Conversion of water into steam is the primary function of a utility boiler. The steam pressure is used to turn
a steam turbine thus, generating electricity. Within the boiler drum there exists a steam/water interface.
Boiler steam drum water level is one of the important parameters of power plant that must be measured
and controlled. For safe and efficient boiler operation, a constant level of water in the boiler drum is
required to be maintained. Too low water level may cause damage boiler tube by overheating. On the other
hand too high drum water level leads to improper function of separators, difficulty in temperature
controlling and damage in superheater tubes. Turbine may also be damaged by moisture or water
treatment chemicals carryover. The amount of water entering the boiler drum must be balanced with the
amounts of steam leaving to accomplish the constant water level in the drum. Therefore it is extremely
important to have the knowledge of the operating principles, installation requirements, strength and
weaknesses of drum water level control system. Ignoring these considerations can result in misapplication,
frequent maintenance, unsafe operation and poor instrument as well as system performance. In this paper
design aspects and installation requirements of boiler drum level control are discussed for safe and
economic operation.
The discussion on "Handling of Turbines During Emergencies" has been detailed in the ppt. Some case studies are also discussed in the session where the course participants express their difficulties while coming across the emergencies in handling the turbines at their locations.
Thermal Power Plant Simulator, Cold, warm and Hot rolling of Steam TurbineManohar Tatwawadi
The presentation describes the cold rolling, warm rolling and hot rolling and synchronising of steam turbine. The Temperature Matching Chart for Turbine metal and Steam is also discussed in the presentation
The discussion on "Handling of Turbines During Emergencies" has been detailed in the ppt. Some case studies are also discussed in the session where the course participants express their difficulties while coming across the emergencies in handling the turbines at their locations.
Thermal Power Plant Simulator, Cold, warm and Hot rolling of Steam TurbineManohar Tatwawadi
The presentation describes the cold rolling, warm rolling and hot rolling and synchronising of steam turbine. The Temperature Matching Chart for Turbine metal and Steam is also discussed in the presentation
The presentation discuss about the operations, causes and remedies for the facing emergencies of steam Turbines. Specially for the 210MW LMW units. The emergencies can be created on simulator and studied on the simulator ACCORDINGLY.
This deals with Boiler feed pumps used in power plants .
contains details about the KHI and FK series pumps , technical parameters and maintenance prctices followed for these pumps
The presentation details about the Boiler Operation specifically while lightup of boiler and loading of boiler. the course participants discuss in details about the operations carried in their respective power stations
The presentation discuss about the operations, causes and remedies for the facing emergencies of steam Turbines. Specially for the 210MW LMW units. The emergencies can be created on simulator and studied on the simulator ACCORDINGLY.
This deals with Boiler feed pumps used in power plants .
contains details about the KHI and FK series pumps , technical parameters and maintenance prctices followed for these pumps
The presentation details about the Boiler Operation specifically while lightup of boiler and loading of boiler. the course participants discuss in details about the operations carried in their respective power stations
Plan de Accion y Ejecutivo AlimentoECO Luis Aguelo ESDEN Business SchoolLuis Aguelo Torrens
Action and Executive Plan about bio supermarket online with full range of bio products and with local business focus, for big cities Madrid and Barcelona. Project made in Madrid for ESDEN Escuela de Negocios y Tecnologias.
ARC's Greg Gorbach Collaborative Enterprise Presentation @ ARC Industry Forum...ARC Advisory Group
ARC's Greg Gorbach Collaborative Enterprise Presentation @ ARC Industry Forum 2010 in Orlando, FL.
The Collaborative Enterprise: People-Centric Collaborative Tools and Technology Enable Teamwork, Innovation, and Productivity Web 2.0 Collaborative Platforms
The Collaborative Enterprise
Market pressures reward companies that dynamically
respond to changing conditions
‘Dynamic’ implies continuous change (innovation)
Innovation is accelerated when people/organizations
collaborate (work together towards a goal)
Technology can enable collaboration necessary for enhanced
innovation; collaboration technologies are evolving
Every company has many potential opportunities to benefit
from improved collaboration
Every project/initiative has a collaborative dimension which
should be given its due
A Collaborative Enterprise seeks to leverage (collaborative)
technology to compete in a dynamic environment through:
• Improving the effectiveness of Teams, Projects, and Initiatives
• Facilitating broad innovation business models, strategies,
tactics, and business management
Javier Velilla - Economía Digital - UOCedigJavier Velilla
Conferencia sobre el programa de Especialización en Empresas en un Entorno Digital de la Business School de la UOC del que soy director académico. Realidad aumentada, sintaxis digital y empresa-red
Enhancing the Performance of An Industrial Boiler Using Fuzzy Logic ControllerIJMREMJournal
This paper focus on the performance of an industrial boiler using fuzzy logic controller. The parameter of the
various industrial boilers are subjected to the change due to change in the environment or atmosphere. These
parameter may be categorized as steam, pressure and temperature of the industrial boiler in use. In this paper
work, a strategy of fuzzy logic controller called fuzzy supervisory is used which generates set points for the
conventional controllers. This work also compared the performance of a boiler evaporator system when the
system is controlled by a traditional proportional integral derivatives type strategy and when the system is
controlled using fuzzy logic blocs to provide set point for it. The main change consists of representing only the
behaviour of the drum evaporator system having a partial model of the combustion process with a simplified
combustion control system and a three element boiler feed water receives a supervisory signal that comes from
fuzzy logic to improve the performance of the overall control system.
Enhancing the Performance of An Industrial Boiler Using Fuzzy Logic ControllerIJMREMJournal
This paper focus on the performance of an industrial boiler using fuzzy logic controller. The parameter of the
various industrial boilers are subjected to the change due to change in the environment or atmosphere. These
parameter may be categorized as steam, pressure and temperature of the industrial boiler in use. In this paper
work, a strategy of fuzzy logic controller called fuzzy supervisory is used which generates set points for the
conventional controllers. This work also compared the performance of a boiler evaporator system when the
system is controlled by a traditional proportional integral derivatives type strategy and when the system is
controlled using fuzzy logic blocs to provide set point for it. The main change consists of representing only the
behaviour of the drum evaporator system having a partial model of the combustion process with a simplified
combustion control system and a three element boiler feed water receives a supervisory signal that comes from
fuzzy logic to improve the performance of the overall control system.
Development of a Bench-Top Air-to-Water Heat Pump Experimental ApparatusCSCJournals
A bench-top air-to-water heat pump experimental apparatus was designed, developed, and constructed for instructional and demonstrative purposes. This air-to-water heat pump experimental apparatus is capable of demonstrating thermodynamics and heat transfer concepts and principles. This heat pump experimental setup was designed around the vapor compression refrigeration cycle. This experimental apparatus has an intuitive user interface, reliable, safe for student use, and portable. The interface is capable of allowing data acquisition by a computer. A PC-based control system which consists of LabVIEW and data acquisition unit is employed to monitor and control this experimental laboratory apparatus. This paper provides details about the development of this unit and the integration of the electrical/electronic component and the control system.
The presentation is about the boiler drum's water level control, which is used on the ship for generating the steam. The presentation briefs about some controls used overboard to maintain the level inside the boiler for continuous steam supply.
Flow Control Using Variable Frequency Drive In Water Treatment Process of Dei...IJTET Journal
Abstract— Water scarcity is a major problem in the current scenario, so consumption of water should be reduced in industries.
The pulp and paper(P&P) industry is one of the heaviest users of water. Water is used in nearly every step of the manufacturing
process. To control the consumption of large amounts of fresh water in industries, water treatment process is important. This
project is done at Tamilnadu Newsprint and Papers Limited, Karur under the area of deinked pulp plant and the process of water
treatment. In water treatment process chemical dosage flow added should be correct according to the inlet flow. In our project
Variable Frequency Drive is used instead of control valve. According to the inlet flow induction motor speed is controlled by
using VFD, then chemical dosage flow, is controlled. The method of speed control used here is vector control. In this process by
using VFD, leakage of chemicals is minimised and the precise control of chemical dosage flow is improved.
The primary function of a utility boiler is to convert water into steam to be used by a steam turbine/ generator in producing electricity. The boiler consists of a furnace, where air and fuel are combined and burned to produce combustion gases, and a feedwater tube system, the contents of which are heated by these gases.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Design and implementation of a water level and pump motor controlling system(...Zabir Arkam
Drinking pure water and using clean water are more important for human body. It is observed commonly in our country that people are not aware of using water in households. Besides the natural sources of clean and pure water on the surface are decreasing day by day. On the other hand, the demand for clean and pure water is increasing due to rapid population growth in our country. It is observed in households that much water is being wasted due to overflow in water tank. Besides, much electric power is being lost due to lack of water pump controlling system. In this project, a calculation has been shown on economic effect due to overflow of water. To address the problem, a water level and water pump controlling system has been designed. In the development of the system a float switch, two indicator lamps, a relay, a magnetic contactor and an alarm have been used. In this project, relay plays an important role in safety which keeps the whole system out of power when accidently or due system fault the water is electrified. Though whole system goes out of power, relay will remain active by taking power from supply though itself. The system has gone under many trials. Finally, a successful and effective operation has been observed under different environments. The main advantages of the sophisticated system are environmentally friendliness, easiness of installation and maintenance, cost effectiveness and availability of its parts.
8th International Conference of Information Technology, Control and Automatio...ijics
8th International Conference of Information Technology, Control and Automation (ITCA 2020) will provide an excellent international forum which contributes new results in all areas of Information Technology (IT), Control Systems and Automation Engineering. The conference focuses on all technical and practical aspects of IT, Control Systems and Automation with applications in real-world engineering and scientific problems. The goal of this conference is to bring together researchers and practitioners from academia and industry to focus on information technology, control engineering, automation, modeling concepts and establishing new collaborations in these areas.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
8th International Conference of Information Technology, Control and Automatio...ijics
8th International Conference of Information Technology, Control and Automation (ITCA 2020) will provide an excellent international forum which contributes new results in all areas of Information Technology (IT), Control Systems and Automation Engineering. The conference focuses on all technical and practical aspects of IT, Control Systems and Automation with applications in real-world engineering and scientific problems. The goal of this conference is to bring together researchers and practitioners from academia and industry to focus on information technology, control engineering, automation, modeling concepts and establishing new collaborations in these areas.
An angular momentum spinner includes two or more rotating arms loaded with an adjustable sliding block
for each arm and laid symmetrically about a rotating center. Each sliding block is controlled to move
along the corresponding rotating arm. Such a spinner can display the conservation of angular momentum
vividly and intuitively, and can also serve as an amusing toy for children. The spinner can be used as a
teaching equipment to demonstrate the theorem of angular momentum conveniently, intuitively and
amusingly.
A STUDY ON APPLICATION OF BAYES’ THEOREM IN APPIN TECHNOLOGYijics
Mathematics is the only word that conquers the whole world. Mathematics comprises each and every concept that exists in this world. Statistics and probability are the two main concepts that are dealing with the statistical survey of this world. Of these two concepts, Probability has one of the Main applications of dealing with mathematics that is very much useful in real life applications. In this paper, Bayes’ Theorem and its applications are discussed deeply with its application problems using the data which was collected for the company named Appin Technology during the industrial exposure training. This application helped me to give some useful ideas to the company to improve their production level.
8th International Conference of Information Technology, Control and Automatio...ijics
8th International Conference of Information Technology, Control and Automation (ITCA 2020) will provide an excellent international forum which contributes new results in all areas of Information Technology (IT), Control Systems and Automation Engineering. The conference focuses on all technical and practical aspects of IT, Control Systems and Automation with applications in real-world engineering and scientific problems. The goal of this conference is to bring together researchers and practitioners from academia and industry to focus on information technology, control engineering, automation, modeling concepts and establishing new collaborations in these areas.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
5th International Conference on Networks, Communications, Wireless and Mobile Computing (NCWMC 2020) looks for significant contributions to the Computer Networks, Communications, wireless and mobile computing for wired and wireless networks in theoretical and practical aspects. Original papers are invited on computer Networks, network protocols and wireless networks, Data communication Technologies, network security and mobile computing. The goal of this Conference is to bring together researchers and practitioners from academia and industry to focus on advanced networking concepts and establishing new collaborations in these areas.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS)
ISSN : 2249 - 1147 [Online]; 2319 - 412X [Print]
http://airccse.org/journal/IJICS/ijics.html
Call For Papers
Important Dates
· Submission Deadline : January 11, 2020
· Acceptance Notification : February 11, 2020
· Final Manuscript Due : February 19, 2020
International Journal of Instrumentation and Control Systems (IJICS)ijics
International Journal of Instrumentation and Control Systems (IJICS) is a Quarterly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Instrumentation Engineering and Control Systems. The journal focuses on all technical and practical aspects of Instrumentation Engineering and Control Systems. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced instrumentation engineering, control systems and automation concepts and establishing new collaborations in these areas. Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the Instrumentation Engineering.
A STUDY ON APPLICATION OF BAYES’ THEOREM IN APPIN TECHNOLOGYijics
Mathematics is the only word that conquers the whole world. Mathematics comprises each and every concept that exists in this world. Statistics and probability are the two main concepts that are dealing with the statistical survey of this world. Of these two concepts, Probability has one of the Main applications of
dealing with mathematics that is very much useful in real life applications. In this paper, Bayes’ Theorem and its applications are discussed deeply with its application problems using the data which was collected for the company named Appin Technology during the industrial exposure training. This application helped me to give some useful ideas to the company to improve their production level.
An angular momentum spinner includes two or more rotating arms loaded with an adjustable sliding block for each arm and laid symmetrically about a rotating center. Each sliding block is controlled to move along the corresponding rotating arm. Such a spinner can display the conservation of angular momentum vividly and intuitively, and can also serve as an amusing toy for children. The spinner can be used as a teaching equipment to demonstrate the theorem of angular momentum conveniently, intuitively and amusingly.
Integrating Fault Tolerant Scheme With Feedback Control Scheduling Algorithm ...ijics
In order to provide Quality of Service (QoS) in open and unpredictable environment, Feedback based
Control Scheduling Algorithm (FCSA) is designed to keep the processor utilization at the scheduling
utilization bound. FCSA controls CPU utilization by assigning task periods that optimize overall control
performance, meeting deadlines even if the task execution time is unpredictable and through performance
control feedback loop.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...
Importance of three elements boiler drum level control and its installation in power plant
1. International Journal of Instrumentation and Control Systems (IJICS) Vol.4, No.2, April 2014
DOI : 10.5121/ijics.2014.4201 1
IMPORTANCE OF THREE-ELEMENTS BOILER
DRUM LEVEL CONTROL AND ITS
INSTALLATION IN POWER PLANT
Sanjoy Kumar Chakraborty1
, Nilotpal Manna2
and Surodh Dey3
1
Department of Electronics and Instrumentation Engineering
JIS College of Engineering, Kalyani, Nadia – 741235, India
2
HOD, Department of Electronics and Instrumentation Engineering
JIS College of Engineering, Kalyani, Nadia – 741235, India
3
Sr. Manager (INST), Tata Power Co. Ltd., Jamshedpur, India
ABSTRACT
Conversion of water into steam is the primary function of a utility boiler. The steam pressure is used to turn
a steam turbine thus, generating electricity. Within the boiler drum there exists a steam/water interface.
Boiler steam drum water level is one of the important parameters of power plant that must be measured
and controlled. For safe and efficient boiler operation, a constant level of water in the boiler drum is
required to be maintained. Too low water level may cause damage boiler tube by overheating. On the other
hand too high drum water level leads to improper function of separators, difficulty in temperature
controlling and damage in superheater tubes. Turbine may also be damaged by moisture or water
treatment chemicals carryover. The amount of water entering the boiler drum must be balanced with the
amounts of steam leaving to accomplish the constant water level in the drum. Therefore it is extremely
important to have the knowledge of the operating principles, installation requirements, strength and
weaknesses of drum water level control system. Ignoring these considerations can result in misapplication,
frequent maintenance, unsafe operation and poor instrument as well as system performance. In this paper
design aspects and installation requirements of boiler drum level control are discussed for safe and
economic operation.
KEYWORDS
Superheater, Steam Drum Level, Wet Leg System, Swell, Cascade Controller.
1. INTRODUCTION
Control of the proper water level in the boiler is critical for operation of the boiler. If the level is
too low, boiler tube will be damaged by overheating. Too high water level leads to improper
function of steam separators, difficulties in temperature control, and the moisture or water
treatment chemical carryover can damage the super heater tubes and turbines. In addition, the
drum pressure control is adversely affected by poor level control. Dynamic simulation studies of
boiler conforms that internal parameters, such as steam pressure, drum level and steam
temperature are essential to be within safety limits [1, 2]. The sliding operation pressure of
modern three drum Heat Recovery Steam Generators, along with frequent start up and shut down,
contributes additional challenge of selecting the proper combination of instruments and
maintaining correct water levels under all conditions.
Steam Drum Level is both critical and difficult to measure and maintain. Precise control of the
water level in the drum is essential. Too high water level can result in water carryover into the
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steam piping. On the other hand, too low water level can expose the generating tubes (down
comers), preventing the water in the drum from cooling the furnace tubes that may be the cause of
possible damage. For measurement of drum level following points must be taken care of.
Elimination of errors which are attributed in measurement due to fluctuating water level or
changing rate of water inflow and steam outflow.
Thermodynamics of pressure and temperature, geometry of the steam drum, and equation
of continuity are the parameters to define transmitter calibration.
The zero elevation and span against transmitter specifications must be checked to ensure
proper calibration of selected transmitter.
Steam drum level controllers are being used from a very long period and their performance
criteria are influenced by various constrains pertaining to control system, process dynamics &
mechanical structural design [3]. The fluctuation range of the water level and water supply flow
can be effectively reduced by conventional PID controller with biological immune adjustment
principle. It exhibits fast response and small overshoots characteristics [4]. The system
performance can be enhanced by using fuzzy logic blocks to provide set-points for the system.
Fuzzy supervisory control generates set-points for the conventional controllers using the strategy
of fuzzy logic controllers (FLCs) [5].
Economic feasibility of a power plant requires smooth and uninterrupted plant operation in spite
of varying electrical power demand. It has been observed from operation experiences of a power
plant that one of frequent causes of shutdowns is by violation of safety limits on the water level
and it is the common observance when the plant is at low operating power. PID controllers can
handle most problems. However, these controllers may not work under certain conditions of
operation such as the effects of ‘‘false water level’’ and wave action (wild oscillation of water
surface). Adaptive Optimal control (AOC) is an important approach for dealing with nonlinearity
problem [6], The concept of modular advanced control system designed for a seamless and
gradual integration into the existing distributed control system has been investigated [7]. For the
quadruple tank process, combination of a gain scheduling controller, a linear parameter varying
controller and an input-output feedback linearization controller have demonstrated very good
performance [8].
The Steam Drum level control is also an influencing factor of overall safety of the power plant as
it is closely related to Main Heat Transport coolant inventory and sustained heat removal through
natural circulation. Steam drum level control at multiple loop configurations has been proposed to
enhance the safety margin [9, 10]. For proper control of drum level single parameter control is not
sufficient, and three element Steam Drum Level Controller has been conventionally used for most
of the boilers where controlling parameters are Drum level, steam flow and feed water flow. In
this paper we will discuss on some the critical issues on drum level measurement and control,
design aspects and installation requirements for safe and trouble-free operation.
2. MEASUREMENT TECHNIQUES OF DRUM LEVEL
Precise measurement of drum level is very difficult due to several factors.
The steam drum itself may not be at perfectly level.
Even at steady state conditions, considerable turbulence in the drum can cause the level to
fluctuate.
Changing rate of water inflow and steam outflow adds to the potential for measurement
error.
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Measurement of boiler steam drum level using differential pressure transmitter must take into
account of certain physical properties of the fluid.
The steam drum contains a two-phase mixture of water and steam at saturation condition.
The densities of water and steam vary with saturation temperature and pressure.
The density of saturated steam above water must be considered, as well as the density of
saturated water in the drum.
There exist several instruments which provide for determination of the boiler drum level by direct
observation such as gauge glasses. This device provides the direct viewing of the liquid level.
Various designs are available providing reflex, transparent or refraction (Bi-colour) images.
However for accurate measurement of drum level and transmit to various equipments for
processing differential pressure transmitter is used.
2.1. Gauge Glass
It is the transparent tube may be mostly enclosed within a metal or toughened glass shroud is
mounted on boiler for direct indication of water level. Two issues are essential in selecting gauge
glasses. Firstly, the ASME (American Society of Mechanical Engineers) Code requires each fired
boiler to have gauge glass and secondly gauge glasses for all boilers operating above 400 PSI.
The gauge glasses must be visible to the boiler operator at the location where immediate control
action is initiated.
2.2. Electronic Probe Level Sensors
Increasingly popular for remote level indication is use of probe type level indicators. The device
consists of an array of probes that provide an incremental representation of the level. These
probes monitor the presence of water electrically and provide both an indication of the level and
control contacts. This eliminates the need for separate devices for indication and control.
2.3. Wet Leg System
For precise measurement of drum level Wet Leg System is useful. In a wet leg system, differential
pressure transmitter is used where the low pressure impulse line is completely field with liquid
(usually the same liquid as the process), and hence the name wet leg. The schematic diagram of
wet leg system is presented at figure1.
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A level transmitter (LT), in association with three valves manifold, is used in an identical manner
as the dry leg system. The gas phase or vapour will be condensed in the wet leg and the catch
tank. The catch tank, with the inclined interconnection line, maintains a constant hydrostatic
pressure on the low pressure side of the level transmitter. This pressure, being a constant, can
easily be compensated for by calibration. Depending on the installation technique and position of
level transmitter in respect of boiler drum, it is necessary to introduce offset at time of calibration
of transmitter. Two approaches are explained here with mathematical interpretation.
(a) Zero Suppression: In some cases, the level transmitter has to be mounted X meters below
the base of an open tank as shown in figure 2.
The liquid in the high pressure impulse line exerts a constant pressure (ܲ ൌ ܵ. ܺ) on the high
pressure side. S is the constant applied for Pressure to height relation. When the liquid level is at
H meters, pressure on the high pressure side of the transmitter will be:
ܲு ൌ ܵ. ܪ ܵ. ܺ ܲ௧
ܲ௪ ൌ ܲ௧
Figure 2: Level transmitter with zero suppression
Figure 1: A wet leg installation
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ܲ ൌ ܲு − ܲ௪ ൌ ܵ. ܪ ܵ. ܺ
The transmitter has to be negatively biased by a value of (– ܵ. ܺ) so that the output of the
transmitter is proportional to tank level (ܵ. )ܪ only. The above procedure is called zero
suppression and it can be done during calibration of the transmitter.
(b) Zero Elevation: When the height of the wet leg (X) is equal to or greater than the maximum
height of the liquid column (H) inside the tank as shown at figure 3, zero elevation offset is to be
applied while calibration of level transmitter.
In a wet leg installation the low pressure side of the level transmitter will always experience a
higher pressure than the high pressure side. When the liquid level is at H meters, we have:
P_High=P_gas+S.H
P_Low=P_gas+S.X
P_Diff=P_High-P_Low=S.H-S.X=-S(X-H)
The differential pressure PDiff sensed by the transmitter is always a negative number (i.e. low
pressure side is at a higher pressure than high pressure side). For proper calibration of the
transmitter, a positive bias (ܵ. ܺ) is introduced to elevate the transmitter output. The positive
biasing technique is called zero elevation.
3. BOILER DRUM LEVEL MEASUREMENT
Drum water level is better measured by differential pressure transmitter. In a pressurized vessel,
measurement of differential pressure is based on the phenomenon that the pressure exerted at any
depth below the surface of the liquid is equivalent to the sum of the hydrostatic pressure acting at
the point of measurement and the static pressure acting on the surface of the liquid. The
hydrostatic pressure can be estimated by multiplying distance of the measuring point below the
liquid surface with liquid density. It is illustrated by the schematic diagram at figure 4.
Figure 3: Wet Leg installation with zero elevation
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For example, a vessel is pressurized by the steam pressure PS acting on the surface of water of
density dW, the level of the liquid being represented by h, above a datum point. Pressure-sensing
connections are provided at the datum (A) and to the gas space (B). The pressure sensed at A is
due to the column of hot water (h), above the datum, in addition to the static pressure (PS), acting
on the liquid surface and drum steam pressure (P0). The pressure sensed at B is only the static
pressure (PS). Hence the difference between two pressures PDiff will be equivalent to the
hydrostatic head of the water level above the datum. By locating the pressure tapping points to
give a desired range of level measurement and measuring the pressure differential between them,
the liquid above the datum at any point within the range may be determined.
The pressure differential will reach its maximum value when the liquid surface is at the datum
level, and approaches towards zero when the liquid level reaches to the upper tapping point, thus
governing the maximum level range.
The hydrostatic pressure is due to the height of the water level above the datum. Representing the
height of the surface above the datum as h and the density of the water at drum pressure and
saturation temperature as dW, the hydrostatic pressure due to water column (PW) will be given by:
ܲௐ ൌ ℎ݀ௐ݃
The pressure of a column of steam is acting on the water surface. The height of the column of
steam will be the difference between overall ranges. Thus represents the operating range of the
level measurement. If hr is been made equivalent to the height of the constant condensate column,
and the density of the drum steam pressure as ds, the pressure (PS ) acting on the surface of the
water is given by:
ܲௌ ൌ (ℎ − ℎ)݀ௌ݃
The pressure due to the constant condensate column is:
ܲ ൌ ℎ݀݃
When the drum steam pressure is P0, the total pressure at A is equivalent to:
Figure 4: Water level measurement in a pressure vessel
Reference
Head
Water Density (dW)
Steam Density (dS)
Water Level
Steam Pressure (PS)
h
(hr-h)
Reference column
Density (dr)
PB
PA
hr
Datum
Level
Differential Pressure
Transmitter (∆P = PA-PB)
Steam Drum
A
B
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ܲ ൌ ܲௐ ܲௌ ܲ
= ℎ݀ௐ݃ (ℎ − ℎ)݀ௌ݃ ܲ
Similarly, total pressure measured at B is:
ܲ ൌ ܲ ܲ
ൌ ℎ݀݃ ܲ
Therefore ܲ ൌ ܲ − ܲ
ൌ ℎ݀ௐ݃ (ℎ − ℎ)݀ௌ݃ ܲ − ℎ݀݃ − ܲ
ൌ ℎ݀ௐ݃ (ℎ − ℎ)݀ௌ݃ − ℎ݀݃
ൌ ℎ(݀ௐ − ݀ௌ)݃ − ℎ(݀ − ݀ௌ)݃
Thus above equation clearly shows that differential pressure is linearly equivalent to water level
of the drum if other parameters are constant. However the accuracy of the method of level
measurement as described will be significantly degraded if the following practical design
conditions are not met.
The temperature of the condensate in the reference column must be as closed as possible
to the water in the vessel.
The pressure in the vessel must not deviate significantly from the working pressure for
which the applied values of the densities of the water and steam are taken.
The reference column head must remain constant and stable under all operating
conditions during which the level measurement is required.
The two impulse lines from the plant tapings to the differential pressure transmitter must
originate from plant connections at the same level, be geometrically similar and be
maintained, as near as possible, at the same temperature.
4. BOILER DRUM LEVEL CONTROL
The information on boiler drum level as measured by above procedure is fed to various process
control units, DCS, SCADA etc. for analysis. After analyzing various information from the drum
level system and other associated sub-systems, the actuating signals are generated from control
units to actuate the control valves of boiler feed water inlet as well as outlet and steam outlet, to
make them open or close.
Under boiling condition, steam supporting field products such as bubbles exist below the
water/steam level interface. There bubbles have volume and therefore displace water to create a
misrepresentation of the true water level in the drum.
Pressure in the drum has another effect upon drum level. Steam bubbles are compressed under
pressure. Due to varying demands of load, the drum pressure changes and therefore the steam
bubbles expand or contract respective to these pressure changes. A higher steam demands will
cause the drum pressure to drop, and the steam bubbles to expand to give the appearance of a
water level that it truly is. The fictitious higher water level cause the feed water input to be shut
down at a time when more water is really required. A surge in water level as a result of the drum
pressure decreasing is called swell. A water level decrease due to drum pressure increase is called
shrink.
4.1. Single Element Drum Level Control
The level transmitters are used to measure the actual drum level. The average of these transmitter
output are compensated for the drum pressure. For load less than 30%, this measured level is
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compared with the set value and the error (single element level error) is applied to the controller
for positioning the control valve at no load (0- 30) % capacity. The control valve position signal
is used as negative feedback for improving the response of the control system.
During start of a boiler, both the feed water and main steam flow rates are below the measurable
ranges, and therefore the three-element control with a level controller and flow controller results
unstabilty. In such cases, it is effective to use single element control in which the feed water
controller is bypassed and the drum level controller directly controls the feed water control valve.
However Single Element Drum Level Control does not perform properly once the boiler is fully
operative. For full running condition of boiler unit other parameters must be taken into account.
In this case three elements drum level control is most effective.
4.2 Three -Elements Drum Level Control
If an unstable feed water system exists exhibiting a variable feed header-to-drum pressure
differential, or if large unpredictable steam demands are frequent, a three- elements drum level
control scheme should be considered. Three elements control is used for load greater than 30%,
to take care of swelling and shrinking asset with load function at higher load.
The control is based on three parameters - mainly a) Drum level b) steam flow c) feed water flow.
Errors of these three elements are computed and control signals are generated to position the
selected full load control valves (30% - 100 %).
Drum Level is measured from drum level transmitter with the compensation of drum
pressure.
Feed Water Flow with compensation of pressure of feed water and temperature.
Main Steam Flow with the help of pressure and temperature and temperature
compensation.
This three-elements controller is often referred as cascade controller in which a drum level
control unit is cascaded into a feed water flow control unit. A schematic diagram of Cascade
controller or three elements drum level controller is shown at figure 5.
Figure 5: Three Elements Drum Level Control
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5. INSTALLATION AND ERECTION WORK
For precise controlling of the boiler drum level, the three elements control is most effective for
considering other important parameters that govern the drum level. Therefore several instruments
are to be installed. Differential Pressure Transmitters are used for measurement of level and flow.
Two control valves are utilized as a final control element for controlling of water and steam flow.
Level switches are used for indication and alarm to ensure the safety. Temperature transmitter are
using for measurement of temperature. All these instruments must be of good accuracy and safe
permissible limit to ensure safety and trouble free operation. The field equipments that are to be
deployed are as under:
1. Differential Pressure for drum level - 2 nos.
2. Flow Transmitter for feed water control - 1 no.
3. Flow Transmitter for steam flow control - 1 no.
4. Pressure Transmitter for drum pressure measurement - 1 no.
5. Temperature Transmitter - 1 no.
6. Level Switches for steam drum water level indication with tripping signal: Very Low
Indication, Low Indication, High Indication, Very High Indication
7. Control Valve for steam flow with positioner - 1 no.
8. Control Valve for water flow with positioner - 1 no.
Minimum requirements of I/O cards in DCS for controlling the parameters and synchronous
operation are as under:
Analog Input card (8 channel) - 1 No.
Analog Output card (4 channel) - 1 No.
Digital Input card, 24 V DC (16 channel) - 1 No.
Digital Output card, 24 V DC (16 channel) - 1 No.
6. CONCLUSION
By steam drum level control, fluctuating of water level or changing rate of water inflow and
steam outflow can be controlled in a better way. The observation data of three elements boiler
drum level control of a power plant on a particular day is presented here. These are tabulated at
table 1 and computer display screen is shown at figure 6. Full Load Main CV (OP) represents
main control valve output in % for feed water flow to maintain steam drum water level. Full Load
FW FCV (main) (PO) is the process value (PV) of feed water flow control valve. 3TX SEL Comp
Drum Level (PV) is the process value in mm of level transmitter (average value of three
transmitters) which is final control parameter. Feed Water Flow (PV) is the process value from
feed water flow transmitter that is one of the input value to PID controller. Total steam flow (PV)
is the process value from steam flow transmitter. Actual load (PV) is the plant capacity in %.
Here plant capacity is considered as 120 MW and current values/ readings are shown at graph are
taken at one hour interval. It may be observed that steam drum level is controlled in better way.
The steam output is exactly according to the process requirement and thus overall efficiency is
increased.
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Table 1: Observations after installation
Figure 6: Control panel computer display
ACKNOWLEDGEMENTS
The Authors acknowledge the Technical Education Quality Improvement Program (TEQIP) for
the support to precede the publication.
11. International Journal of Instrumentation and Control Systems (IJICS) Vol.4, No.2, April 2014
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ABOUT THE AUTHORS
Sanjoy Kumar Chakraborty completed A.M.I.E. in Electronics & communication engineering in the year of
1992 from the Institution Of Engineers (I).He is M .Tech student (final semester) of Applied Electronics &
Instrumentation from JIS college of engineering. He has been trained at various software courses from
Jadavpur University including Information Technology from CMC. He has about 19 years experience in
process control and instrumentation with exposure of project execution, erection & commissioning and &
maintenance. The projects are related to steel plane, chemical plant, cement plant, oil industry etc. He
worked in Ruchi Soya Industries Ltd. as Dy. Manager Instrumentation. He is the Member of Electronics &
Telecommunication engineering division & computer science and engineering division of Institution of
engineers (I), Kolkata chapter.
Nilotpal Manna obtained B.E. degree in Electronics and Telecommunication Engineering in 1979 from
Bengal Engineering College, Sibpore, Kolkata, now renamed as Bengal Engineering and Science
University and received M Tech degree in 1981from Indian Institute of Technology Madras (Chennai). He
has wide industrial experience of twenty-two years from semi- government sectors like Instrumentation
Ltd, Kota and several private industries like Toshniwal Instruments Manufacturing Pvt Ltd and others. He
served mostly in the Research and Development wings and was associated in development of various
electronic and communication instruments meant for military application as well as development of
analytical instruments. At present he is Head of the Department of Electronics and Instrumentation
Engineering of JIS College of Engineering, Kalyani, West Bengal, India. He has several research
publications in national and international journals and conferences, and authored four technical books.
E-mail: nmanna324@gmail.com
Mr. Surodh dey completed A.M.I.E in electronics and communication engineering from the Institution of
Engineers (I) in the year 1991. He joined Bells Control Ltd. as instrumentation engineer. Thereafter he
joined Tata Honeywell Ltd (USA based company) at customer support division and worked for fourteen
years. He was assigned to installation and erection work of various power projects. At present he is
working in Tata Power Co Ltd. as head of the Instrumentation Department.