This document summarizes a numerical study comparing the melting performance of three phase change materials (PCMs) - paraffin wax, sodium acetate trihydrate, and lauric acid - in a two-dimensional hollow spherical container. The study uses computational fluid dynamics (CFD) simulations to analyze melt fraction contours and temperature distributions over time as each PCM melts. Grid independence and time independence tests were performed to select appropriate mesh and time step sizes for the simulations. Results show the energy stored by each PCM and compare their melting performances.
Abstract:This paper deals with the thermal and CFD analysis of automobile radiator. The theoretical calculation has been done in MAT Lab by varying the mass flow rate of coolant. Modeling has been done in Solidworks and exported to Ansys for CFD analysis. The temperature distribution, heat transfer rate for different velocities of coolant to has been done for different tube materials such as copper, aluminium and stainless steel. The numerical results were compared and found that copper has best heat transfer rate and has better efficiency than the others.
Development of Thermal Conductivity Measurement Test Rig for Engineering Mate...IOSR Journals
This paper describe the development of a hot rod method by using water as a coolant medium which
measure the heat loss through the rod for the steady state measurement of thermal conductivity of small
samples. The heat flow through the test sample was essentially one dimensional and heat loss through
engineering material is made to use heated guard to block the flow of heat from the hot rod to the
surroundings. Since large correction factors must be applied to account for guard imperfection and not
maintained ideal condition. So that it may be preferable to simply measure and correct for the heat that flows
from the heater disc to directions other than into the sample. Experimental measurements taken in a prototype
apparatus combined with extensive computational modeling of the heat transfer in the apparatus show that
sufficiently accurate measurements can be obtained to allow determination of thermal conductivity of
engineering material. Suggestions are made for further improvements in the method based on results from
regression analysis of the generated data.
Abstract:This paper deals with the thermal and CFD analysis of automobile radiator. The theoretical calculation has been done in MAT Lab by varying the mass flow rate of coolant. Modeling has been done in Solidworks and exported to Ansys for CFD analysis. The temperature distribution, heat transfer rate for different velocities of coolant to has been done for different tube materials such as copper, aluminium and stainless steel. The numerical results were compared and found that copper has best heat transfer rate and has better efficiency than the others.
Development of Thermal Conductivity Measurement Test Rig for Engineering Mate...IOSR Journals
This paper describe the development of a hot rod method by using water as a coolant medium which
measure the heat loss through the rod for the steady state measurement of thermal conductivity of small
samples. The heat flow through the test sample was essentially one dimensional and heat loss through
engineering material is made to use heated guard to block the flow of heat from the hot rod to the
surroundings. Since large correction factors must be applied to account for guard imperfection and not
maintained ideal condition. So that it may be preferable to simply measure and correct for the heat that flows
from the heater disc to directions other than into the sample. Experimental measurements taken in a prototype
apparatus combined with extensive computational modeling of the heat transfer in the apparatus show that
sufficiently accurate measurements can be obtained to allow determination of thermal conductivity of
engineering material. Suggestions are made for further improvements in the method based on results from
regression analysis of the generated data.
Modelling of fouling in heat exchangers using the Artificial Neural Network A...AI Publications
In this paper, modelling by neural networks was used for obtaining a model for the calculation of fouling factors in heat exchangers. The heat exchangers used in this study are a series of four exchangers where a model was obtained for each exchanger after due estimation of its heat load. The basic theme of this paper is the investigation of fouling factors and the determination of relevant indicators followed by combining design and operation factors along with fouling factors in a mathematical model that may be used for the calculation of the fouling factor. The devised model was tested for reliability and its accuracy in predicting new values for the fouling factor was greater than 98% in view of the design of the model Furthermore, the number of elements related to the design and operation was reduced to four developed formulae (developed factors) to which were added later the four factors selected as indicators of the occurrence of fouling. Both were then used as network input, whereas the output was the value of the fouling factor. The importance of this modelling lies in the fact that it enables the operator to continually predict the value of the fouling factor in heat exchangers and it assists him in taking appropriate measures to alleviate fouling effects ensuring thereby continuous operation of the unit and prevention of emergency shut downs.
Application of Pinch Technology in Refrigerator Condenser Optimization by Usi...ijtsrd
Refrigeration is the major application area of thermodynamics, in which the heat is transferred to higher temperature region from a lower temperature region. Refrigerators are the devices which produce refrigeration and the refrigerators which operate on the cycles are called refrigeration cycles. Pinch technology and computational fluid dynamics CFD is key for study the condenser and enhance the better option for new design. Pinch Analysis also known as process integration, heat integration, energy integration, or pinch technology is method for minimizing the energy costs of a process by reusing the heat energy in the process streams rather than outside utilities. Mr. Mayur B. Ramteke | Prof. S. K. Bawne "Application of Pinch Technology in Refrigerator Condenser Optimization by Using CFD" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46440.pdf Paper URL : https://www.ijtsrd.com/engineering/mechanical-engineering/46440/application-of-pinch-technology-in-refrigerator-condenser-optimization-by-using-cfd/mr-mayur-b-ramteke
With increasing pollution worldwide, the emission standards for diesel engines has become more stringent. The Euro 6 limits the NOxemission from diesel engine to 0.08 g Km. The current paper presents the various analysis method of EGR cooler operating under different conditions. The primary causes of EGR failures i.e. fouling is also studied by various scholars. The numerical method CFD encompassing 1D geometry and experimental techniques of evaluating EGR cooler is also studied. The effect of geometry, material and operating conditions on performance of EGR cooler are investigated by various scholars and the results obtained by such tests are also presented. Dwarika Sahu | Dr. S. S. K. Deepak "Review on Numerical Analysis of EGR Cooler" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33570.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/33570/review-on-numerical-analysis-of-egr-cooler/dwarika-sahu
Magnetic field effect on mixed convection flow in a nanofluid under convectiv...IAEME Publication
An analysis is carried out to investigate the influence of the prominent magnetic effect on mixed convection heat and mass transfer in the boundary layer region of a semi-infinite vertical flat plate in a nanofluid under the convective boundary conditions. The transformed boundary layer,ordinary differential equations are solved numerically using Runge-Kutta Fourth order method.
The International Journal of Mechanical Engineering Research and Technology is an international online journal published Quarterly offers fast publication schedule whilst maintaining rigorous peer review. The use of recommended electronic formats for article delivery expedites the process of All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field of appropriate to ensure that they are likely to be the level of interest and importance of appropriate for the journal.
Modelling of fouling in heat exchangers using the Artificial Neural Network A...AI Publications
In this paper, modelling by neural networks was used for obtaining a model for the calculation of fouling factors in heat exchangers. The heat exchangers used in this study are a series of four exchangers where a model was obtained for each exchanger after due estimation of its heat load. The basic theme of this paper is the investigation of fouling factors and the determination of relevant indicators followed by combining design and operation factors along with fouling factors in a mathematical model that may be used for the calculation of the fouling factor. The devised model was tested for reliability and its accuracy in predicting new values for the fouling factor was greater than 98% in view of the design of the model Furthermore, the number of elements related to the design and operation was reduced to four developed formulae (developed factors) to which were added later the four factors selected as indicators of the occurrence of fouling. Both were then used as network input, whereas the output was the value of the fouling factor. The importance of this modelling lies in the fact that it enables the operator to continually predict the value of the fouling factor in heat exchangers and it assists him in taking appropriate measures to alleviate fouling effects ensuring thereby continuous operation of the unit and prevention of emergency shut downs.
Application of Pinch Technology in Refrigerator Condenser Optimization by Usi...ijtsrd
Refrigeration is the major application area of thermodynamics, in which the heat is transferred to higher temperature region from a lower temperature region. Refrigerators are the devices which produce refrigeration and the refrigerators which operate on the cycles are called refrigeration cycles. Pinch technology and computational fluid dynamics CFD is key for study the condenser and enhance the better option for new design. Pinch Analysis also known as process integration, heat integration, energy integration, or pinch technology is method for minimizing the energy costs of a process by reusing the heat energy in the process streams rather than outside utilities. Mr. Mayur B. Ramteke | Prof. S. K. Bawne "Application of Pinch Technology in Refrigerator Condenser Optimization by Using CFD" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46440.pdf Paper URL : https://www.ijtsrd.com/engineering/mechanical-engineering/46440/application-of-pinch-technology-in-refrigerator-condenser-optimization-by-using-cfd/mr-mayur-b-ramteke
With increasing pollution worldwide, the emission standards for diesel engines has become more stringent. The Euro 6 limits the NOxemission from diesel engine to 0.08 g Km. The current paper presents the various analysis method of EGR cooler operating under different conditions. The primary causes of EGR failures i.e. fouling is also studied by various scholars. The numerical method CFD encompassing 1D geometry and experimental techniques of evaluating EGR cooler is also studied. The effect of geometry, material and operating conditions on performance of EGR cooler are investigated by various scholars and the results obtained by such tests are also presented. Dwarika Sahu | Dr. S. S. K. Deepak "Review on Numerical Analysis of EGR Cooler" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-6 , October 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33570.pdf Paper Url: https://www.ijtsrd.com/engineering/mechanical-engineering/33570/review-on-numerical-analysis-of-egr-cooler/dwarika-sahu
Magnetic field effect on mixed convection flow in a nanofluid under convectiv...IAEME Publication
An analysis is carried out to investigate the influence of the prominent magnetic effect on mixed convection heat and mass transfer in the boundary layer region of a semi-infinite vertical flat plate in a nanofluid under the convective boundary conditions. The transformed boundary layer,ordinary differential equations are solved numerically using Runge-Kutta Fourth order method.
The International Journal of Mechanical Engineering Research and Technology is an international online journal published Quarterly offers fast publication schedule whilst maintaining rigorous peer review. The use of recommended electronic formats for article delivery expedites the process of All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field of appropriate to ensure that they are likely to be the level of interest and importance of appropriate for the journal.
international research journal of engineering and technology 3 nov.pdfnareshkotra
The International Journal of Mechanical Engineering Research and Technology is an international online journal in English published Quarterly offers a fast publication schedule whilst maintaining a proper peer review and the use of recommended electronic formats for an article delivery expedites the process of All submitted research articles are subjected to an immediate rapid screening by the editors consultation with the Editorial Board or others working in the field as assure that they are likely to be the level of interest and importance of appropriate for the journal.
The International Journal of Mechanical Engineering Research and Technology is an international online journal in English published Quarterly offers a fast publication schedule with whilst maintaining a rigorous peer review and the use of recommended electronic formats for article delivery expedites the process of All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field as appropriate to ensure they are likely to be the level of interest and importance appropriate for the journal.
The International Journal of Mechanical Engineering Research and Technology is an international online journal in English published Quarterly offers a fast publication schedule whilst maintaining rigorous peer review the use of recommended electronic formats for article delivery expedites the process All submitted research articles are subjected to immediate rapid screening by the editors consultation with the Editorial Board or others working in the field as appropriate to ensure they are likely to be the level of interest and importance appropriate for the journal.
Energy Storage: CFD Modeling of Phase Change Materials For Thermal Energy Sto...IJERA Editor
To optimize the utilization of thermal conversion systems it is needed to integrate them with thermal energy
storage. Between many types of base materials, the phase change materials (PCMs) are the most adequate
mediums to store and release the thermal energy. PCMs have high latent heat of fusion and, in general, low
thermal conductivity, therefore, nanomaterials are used as additives to enhance the properties of base materials
as PCMs.
Paper presents an exhaustive classification of PCMs and nanomaterials used in thermal energy storage
technologies in addition an assessment about their modeling through computational fluid dynamics (CFD).
Goal was to emphasize CFD use as an effective tool to increase engineering development of thermal energy
storage technologies
Transient thermal analysis of phase change material based heat sinkseSAT Journals
Abstract Integrated circuits operate best in a limited range of temperature hence their package must be designed to remove the excessive heat. As an alternative passive cooling technique means, phase change materials or PCMs have been widely investigated for such transient cooling applications considering their advantage such as high latent heat of fusion, high specific heat, controllable temperature stability and small volume change during phase change, etc. This PCM based cooling techniques have great potential application in the devices which are not operated continuously over a long period, but in intermittently using devices like cellular phones, digital cameras, notebook etc. The PCM absorbs heat from the electronic component when it operates and melts, the molten PCM needs to be re-solidified by dissipating heat to the surroundings while the electronic device are idle, such a cooling system is applicable only for intermittent use devices and not those in continuous operation. To achieve effective cooling it is important to ensure that the operating duration of the electronic device does not exceed the time of full melting of PCM. Advanced transient analysis is required for clear understanding of the mechanism behind this method of cooling while practical implementations are considered. Controlled convective cooling techniques can be implemented for continuous operation such kind of systems. The present work is a numerical study consists of thermal analysis of various configurations of finned heat sink with PCM. The configurations considered are finned heat sink without PCM and with PCM, Half-filled PCM towards the fin tip side and cases which includes forced convection for systems with continuous operation. The unsteady analyses were performed to record the transient nature of problem. The characteristic of PCM and the design of operational time of convective cooling are estimated. By analyzing these different configurations a vivid picture of the physics of heat transfer in PCM based heat sink is figured out. Keywords: Phase change materials; Heatsink; electronics cooling; Thermal management
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
Simulation of curing process of carbon/epoxy composite during autoclave degas...Darkdragon766
Simulation of curing process of carbon/epoxy composite during
autoclave degassing molding by considering phase changes of epoxy
resin
Seong-Hwan Yoo a, b
, Min-Gu Han a
, Jin-Ho Hong a
, Seung-Hwan Chang a, *
a School of Mechanical Engineering, Chung-Ang University (CAU), 221, Huksuk-Dong, Dongjak-Gu, Seoul 156-756, Republic of Korea
b Korea Photonics Technology Institute Lighting Solution R&BD Center, Gwangju, Republic of Korea
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers