This document discusses simultaneous heat and mass transfer processes. It notes that heat conduction, mass diffusion, and fluid flow obey similar governing equations. While heat and mass transfer are mathematically analogous for gases, they are not as closely coupled for liquids due to lower mass diffusivity. The Chilton-Colburn analogy was developed based on experimental data to relate heat and mass transfer coefficients for liquids, with an exponent of 2/3. Cooling tower design examples demonstrate how heat and mass transfers are coupled in such systems.
”Waste heat recovery” is the process of “heat integration”, that is, reusing heat energy that would otherwise be disposed of or simply released into the atmosphere. By recovering waste heat, plants can reduce energy costs and CO2 emissions, while simultaneously increasing energy efficiency.
This presentation describes how use of judiciously selected Phase Change Materials can be used effectively to store energy and make it available when needed.
In a solar thermal application, typically sunlight is available in a 6-8 hour window from 8am to 4pm. However, the usage extends much beyond that. Phase Change Materials can be used to store energy for usage as required.
Learn how a basic chiller works through Bergs School of Cool. To learn more about refrigerants and chillers, please visit: http://berg-group.com/engineered-solutions/the-science-behind-refrigeration/
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Syllabus:
Availability and Irreversibility
Availability Function
Second Law Efficiencies
Work Potential Associated with Internal Energy
Waste Heat Recovery
Heat Losses – Quality vs. Quantity
Principle of Heat Recovery Units
Classification of WHRS on Temperature Range Bases
Commercial Viable Waste Heat Recovery Devices
Benefits of Waste Heat Recovery
Development of a Waste Heat Recovery System
Commercial Waste Heat Recovery Devices
West Heat Recovery Boiler (WHRB)
Recuperators- Regenerative, Ceramic, Regenerative Heat Exchanger
Thermal wheel/ Heat Wheel
Heat Pipe
Economiser
Feed Water
Heat Pump
Shell and Tube Heat Exchanger
Plate Heat Exchanger
Run-around coil
Direct Contact Heat Exchanger
Advantages and Limitations of WHRD’s
Heat transfer equipment is defined by the function it fulfills in a process. On the similar path, Heat exchangers are
the equipment used in industrial processes to recover heat between two process fluids. They are widely used in space
heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, and
natural gas processing. The operating efficiency of these exchangers plays a very key role in the overall running cost
of a plant. So the designers are on a trend of developing heat exchangers which are highly efficient, compact, and cost
effective.
heat conduction and its mechanisms ,thermal conductivity,Fourier law,variation of thermal conductivity with temperature in metals and solids,steady and unsteady states,biot and Fourier numbers and their significance, Lumped heat analysis
”Waste heat recovery” is the process of “heat integration”, that is, reusing heat energy that would otherwise be disposed of or simply released into the atmosphere. By recovering waste heat, plants can reduce energy costs and CO2 emissions, while simultaneously increasing energy efficiency.
This presentation describes how use of judiciously selected Phase Change Materials can be used effectively to store energy and make it available when needed.
In a solar thermal application, typically sunlight is available in a 6-8 hour window from 8am to 4pm. However, the usage extends much beyond that. Phase Change Materials can be used to store energy for usage as required.
Learn how a basic chiller works through Bergs School of Cool. To learn more about refrigerants and chillers, please visit: http://berg-group.com/engineered-solutions/the-science-behind-refrigeration/
Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Syllabus:
Availability and Irreversibility
Availability Function
Second Law Efficiencies
Work Potential Associated with Internal Energy
Waste Heat Recovery
Heat Losses – Quality vs. Quantity
Principle of Heat Recovery Units
Classification of WHRS on Temperature Range Bases
Commercial Viable Waste Heat Recovery Devices
Benefits of Waste Heat Recovery
Development of a Waste Heat Recovery System
Commercial Waste Heat Recovery Devices
West Heat Recovery Boiler (WHRB)
Recuperators- Regenerative, Ceramic, Regenerative Heat Exchanger
Thermal wheel/ Heat Wheel
Heat Pipe
Economiser
Feed Water
Heat Pump
Shell and Tube Heat Exchanger
Plate Heat Exchanger
Run-around coil
Direct Contact Heat Exchanger
Advantages and Limitations of WHRD’s
Heat transfer equipment is defined by the function it fulfills in a process. On the similar path, Heat exchangers are
the equipment used in industrial processes to recover heat between two process fluids. They are widely used in space
heating, refrigeration, air conditioning, power plants, chemical plants, petrochemical plants, petroleum refineries, and
natural gas processing. The operating efficiency of these exchangers plays a very key role in the overall running cost
of a plant. So the designers are on a trend of developing heat exchangers which are highly efficient, compact, and cost
effective.
heat conduction and its mechanisms ,thermal conductivity,Fourier law,variation of thermal conductivity with temperature in metals and solids,steady and unsteady states,biot and Fourier numbers and their significance, Lumped heat analysis
Derive the relationship between the effectiveness and the number of transfer ...AmitKVerma3
1. what is the difference between heat transfer and Thermodynamics?
2. Derive the relationship between the effectiveness and the number of transfer units
for a counter flow heat exchanger.
3.Explain the following : Capacity ratio, Heat exchanger effectiveness, Number of
transfer units
As companies examine their total cost of operations, energy usage and heat recovery deliver cost savings through increased energy utilization and efficiency. Heat exchangers offer companies the opportunity to reuse energy generated for a specific purpose instead of venting that energy to the atmosphere. Shell and tube heat exchangers are in wide use throughout the Food, Dairy, Beverage, Pharmaceutical, Chemicals, Petroleum Refining, and Utility industries. This paper briefly explores three modes of heat transfer and basic designs found in shell and tube heat exchangers. Also included are several case studies from different industries where
Enerquip’s heat exchangers have saved the operators energy and money.
GATE Mechanical Engineering notes on Heat Transfer. Use these notes as a preparation for GATE Mechanical Engineering and other engineering competitive exams. For full course visit https://mindvis.in/courses/gate-2018-mechanical-engineering-online-course or call 9779434433.
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.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
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.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
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.
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.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
6. Cooling metal spheres We want to quickly quench a liquid metal to make fine powder. We plane to do this by spraying drops into an oil bath. How can we estimate the cooling speed of the drops? No suitable heat transfer correlations! However, several mass transfer correlations for drops are given: For large drops without stirring: Sherwood number, kd/D ~ Nusselt number, hd/k Schmidt number, v/D ~ Prandtl number, v/α This correlation will be reliable only if the Grashöf number for the cooling falls in the same range as that used to develop the mass transfer correlation.
7. Heat transfer from a spinning disc Imagine that a spinning metal disc electrically heated to 30C is immersed in 1000 cm 3 of an emulsion at 18C. The disc is 3 cm in diameter and is turning at 10 rpm. The emulsion’s kinetic viscosity is 0.082 cm 2 /sec. After an hour, the emulsion is at 21C. What is its thermal diffusivity? Energy balance: I.C., t = 0, T = T 0 α = ? Mass transfer away from a spinning disc:
13. Design of cooling towers Calculate the size of a tower required to cool a given amount of water: Fig. 20.3.2 Fig. 20.3.1 Hot water in Cold water out z Cold air in Hot air out
14. The mass balance on the water vapor in the control volume Water accumulation = water convection in minus that out + water added by evaporation The energy balance on the wet air in the control volume The energy balance on both liquid water and wet air in the control volume:
15. Coupling: X Assuming, the Chilton-Colburn analogy =1 for gases
18. Design a countercurrent cooling tower to cool water at 2150 kg/min. The water enters at 60C and is to be cooled to 25C. The air is fed at 60 g-mol/m 2 .sec with a dry-bulb temperature of 30C and a dew point temperature of 10C. The water flux should be 40% lower than the maximum allowed thermodynamically. Find (1) the flow rate of the water per tower cross section, (2) the tower cross section, and (3) the height of tower required. Refer to Fig 20.3-5, the maximum water flow : AB’ (1) Slope of AB’ = 40% Slop of actual operating line, AB = 110 x 75 / 60 = 137.5 (2) the tower cross section: (3) the tower height:
19.
20. Experimental values: Table 20.5-1 The temperature gradient effect disappears rapidly for dilute solution and is largest when solute and solvent concentrations are similar.
21. Thermal diffusion is studied in a two-bulb apparatus. Each bulb is 3 cm 3 in volume; the capillary is 1 cm long and has an area of 0.01 cm 2 . The left-hand bulb is heated to 50C, and the right-hand bulb is kept at 0C. The entire apparatus is initially filled with an equilmolar mixture, either of hydrogen-methane or of ethanol-water. How much separation is achieved? About how long does this separation take? Thermal diffusion: gas mixture ethanol-water The separations are small; that with liquids is slightly larger but in the opposite direction. Mass balance on the left-hand bulb: Mass balance on the left-hand bulb: Integration… gas ~ 500sec liquid ~ 180 days
![Mathematical analogies ,[object Object],[object Object],[object Object],semiinfinite slab semiinfinite slab Thermal diffusivity Thermal conductivity](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)