The document summarizes research on phase change materials (PCMs) that can store and release large amounts of thermal energy during melting and freezing. It reviews several studies on developing PCMs for thermal energy storage applications in construction. Some key findings discussed include nanoencapsulating organic PCMs like n-octadecane to improve stability and thermal properties; adding micro-PCM and TiO2 nanoparticles to polyvinyl chloride films to control temperature ranges in buildings; incorporating fatty acid-based nano-PCM and graphite sheets into gypsum boards to significantly reduce energy demands; and using materials like polyethylene glycol and nanoparticles to create nanofibers with improved thermal conductivity for storing thermal energy in construction.
Ph d defense_rajmohan_muthaiah_University_of_oklahoma_07_28_2021Rajmohan Muthaiah
This slide describes the thermal transport in polymers, polymer nanocomposites and semiconductors using molecular dynamics simulations and first principles calculations
Development of Nanocomposite from Epoxy/PDMS-Cyanate/Nanoclay for Materials w...IJMER
Dicyanate monomer viz bis-4-cyanato-polydimethylsiloxane(PDMS-CY) containing
siloxane known as thermally stable structural unit was prepared. The PDMS-CY/DGEBA-stability, thermal degradation kinetics and microstructures
Ph d defense_rajmohan_muthaiah_University_of_oklahoma_07_28_2021Rajmohan Muthaiah
This slide describes the thermal transport in polymers, polymer nanocomposites and semiconductors using molecular dynamics simulations and first principles calculations
Development of Nanocomposite from Epoxy/PDMS-Cyanate/Nanoclay for Materials w...IJMER
Dicyanate monomer viz bis-4-cyanato-polydimethylsiloxane(PDMS-CY) containing
siloxane known as thermally stable structural unit was prepared. The PDMS-CY/DGEBA-stability, thermal degradation kinetics and microstructures
Simulation Studies Of Premixed N-Pentane/Air Liquid Micro CombustionIJERA Editor
With latest improvements in MEMS, combustion based Micro-Power generation devices are seen as alternatives for conventional batteries because of the high energy densities of Hydrogen and other hydrocarbon fuels. An important feature of micro-power system is to utilize the combustion of fuel or propellant in the micro-burner to produce the gas with high temperature and high pressure to drive turbines or other power units, which convert chemical into energy directly or indirectly other forms of energy, for example heat or power. We have concentrated on the usage of Micro combustion as a substitute for conventional batteries .In our study, a Micro Combustor of 1mm x 10mm is taken for Numerical Study. Combustion characteristics of N Pentane-Air mixture in a planar micro-channel is studied numerically. We have performed the liquid fuel combustion of n-Pentane and air to study the effects of liquid fuel combustion in a micro channel. The effect of axial velocity inlet, on exhaust gas temperature and Hydrogen Peroxide addition on exhaust gas concentration was analyzed respectively. We also investigated numerically the combustion characteristics under different conditions such as by varying the DPM, Number of Fuel Streams, and Spray Angle and so on. For this numerical analysis, an experimental model is considered as reference, and the geometry and the boundary conditions are taken from it for the purpose of simulation. In this study, n-Pentane is introduced as liquid droplets at the centerline and the liquid combustion is simulated numerically.
An experimental and analytical study to show the effect of theOzyegin University
The main purpose of this paper is showing the enhancement of thermal conductivity
of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure
carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%,
respectively. All of these samples are tested at different values of applied powers (input power)
(10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the
composites that involve all these percentages is done. In addition, the study involves the effect of
these simples on the performances of both Aluminum and cooper heat sinks.
It is shown from the results that increasing in fiber carbon percentage leads to increase in
thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency,
and density of composite. The increasing in overall heat sink efficiency leads to decrease the
height of heat sink, and consequently decreasing its cost. For instance at 70 W power input,
increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to
decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in
junction temperature by 65 %, and increase fin efficiency by 2.5 %.
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
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Influence of Operating Variables on Functional Parameters of Ammonia Synthesi...Premier Publishers
The synthesis of ammonia involves several parameters that require appropriate control measures. Hence, this study investigated the effects of operating temperature and pressure on size, space velocity, mean residence time and heat generated per unit reactor volume at capacity of 430,000 tons of ammonia production per year. The analysis was performed at temperature and pressure ranges of 673 – 773 K and 150 – 300 atm. At constant conversion, the volume and mean residence time decreased with increase in operating temperature and pressure, while space velocity and heat generated per unit reactor volume increased with increasing temperature and pressure. For instance, from 698 – 773 K and at constant pressure of 250 atm and 0.32 conversion, volume and mean residence time decreased from 3.717 to 0.501 m3 and 7.01 x 10-5 to 9.46 x 10-6 hr, while space velocity and heat generated per unit reactor volume increased from 1.698 x 104 to 1.259 x 105 hr-1 and 1.40 x 107 to 1.57 x 108 kJ/hr.m3 respectively. The temperature and pressure ranges may be realistic, but 698 K and 250 atm is considered for the designed capacity based on the process economics, size and heat requirement.
Order Parameter and Elastic Constants Studies of Liquid CrystalsIJERA Editor
This study focused on the smectogenic polysiloxane, PG296, and the nematogenic, PG375, Where noted the lower order parameter at higher molecular weight polymers, they do support the overall trend of an increased nematic range with increasing polymer concentration. The reduced solvent power of 5CB when used with the polymer PG375 might be associated with the lack of side groups of similar cyanobiphenyl structure in the polymer but could also be related to the strong dipolar anti-parallel associations that might be expected to form between the cyano terminated polymer side groups, thus locking in the backbone configuration. The elastic constants and S2 as a function of polymer concentration, where the constants decreases with increasing concentration of the solution.
Simulation Studies Of Premixed N-Pentane/Air Liquid Micro CombustionIJERA Editor
With latest improvements in MEMS, combustion based Micro-Power generation devices are seen as alternatives for conventional batteries because of the high energy densities of Hydrogen and other hydrocarbon fuels. An important feature of micro-power system is to utilize the combustion of fuel or propellant in the micro-burner to produce the gas with high temperature and high pressure to drive turbines or other power units, which convert chemical into energy directly or indirectly other forms of energy, for example heat or power. We have concentrated on the usage of Micro combustion as a substitute for conventional batteries .In our study, a Micro Combustor of 1mm x 10mm is taken for Numerical Study. Combustion characteristics of N Pentane-Air mixture in a planar micro-channel is studied numerically. We have performed the liquid fuel combustion of n-Pentane and air to study the effects of liquid fuel combustion in a micro channel. The effect of axial velocity inlet, on exhaust gas temperature and Hydrogen Peroxide addition on exhaust gas concentration was analyzed respectively. We also investigated numerically the combustion characteristics under different conditions such as by varying the DPM, Number of Fuel Streams, and Spray Angle and so on. For this numerical analysis, an experimental model is considered as reference, and the geometry and the boundary conditions are taken from it for the purpose of simulation. In this study, n-Pentane is introduced as liquid droplets at the centerline and the liquid combustion is simulated numerically.
An experimental and analytical study to show the effect of theOzyegin University
The main purpose of this paper is showing the enhancement of thermal conductivity
of the epoxy with many percentages of carbon fiber into it. In addition to pure epoxy and pure
carbon fiber, three percentages of carbon fiber are used in this study, which are 20, 40, and 60%,
respectively. All of these samples are tested at different values of applied powers (input power)
(10, 25, 40, 55, and 70 W). A comparison between pure epoxy, pure carbon fiber and the
composites that involve all these percentages is done. In addition, the study involves the effect of
these simples on the performances of both Aluminum and cooper heat sinks.
It is shown from the results that increasing in fiber carbon percentage leads to increase in
thermal conductivity of composite, heat sink junction temperature, overall heat sink efficiency,
and density of composite. The increasing in overall heat sink efficiency leads to decrease the
height of heat sink, and consequently decreasing its cost. For instance at 70 W power input,
increasing the fiber carbon percentage(from 0 to 100%) for each material of heat sink, leads to
decrease the average fin length by 48% ,decrease the manufacturing cost by 47%, increase in
junction temperature by 65 %, and increase fin efficiency by 2.5 %.
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
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Influence of Operating Variables on Functional Parameters of Ammonia Synthesi...Premier Publishers
The synthesis of ammonia involves several parameters that require appropriate control measures. Hence, this study investigated the effects of operating temperature and pressure on size, space velocity, mean residence time and heat generated per unit reactor volume at capacity of 430,000 tons of ammonia production per year. The analysis was performed at temperature and pressure ranges of 673 – 773 K and 150 – 300 atm. At constant conversion, the volume and mean residence time decreased with increase in operating temperature and pressure, while space velocity and heat generated per unit reactor volume increased with increasing temperature and pressure. For instance, from 698 – 773 K and at constant pressure of 250 atm and 0.32 conversion, volume and mean residence time decreased from 3.717 to 0.501 m3 and 7.01 x 10-5 to 9.46 x 10-6 hr, while space velocity and heat generated per unit reactor volume increased from 1.698 x 104 to 1.259 x 105 hr-1 and 1.40 x 107 to 1.57 x 108 kJ/hr.m3 respectively. The temperature and pressure ranges may be realistic, but 698 K and 250 atm is considered for the designed capacity based on the process economics, size and heat requirement.
Order Parameter and Elastic Constants Studies of Liquid CrystalsIJERA Editor
This study focused on the smectogenic polysiloxane, PG296, and the nematogenic, PG375, Where noted the lower order parameter at higher molecular weight polymers, they do support the overall trend of an increased nematic range with increasing polymer concentration. The reduced solvent power of 5CB when used with the polymer PG375 might be associated with the lack of side groups of similar cyanobiphenyl structure in the polymer but could also be related to the strong dipolar anti-parallel associations that might be expected to form between the cyano terminated polymer side groups, thus locking in the backbone configuration. The elastic constants and S2 as a function of polymer concentration, where the constants decreases with increasing concentration of the solution.
Phase change material (PCM) thermal composites consisting of porous aluminium/stearic acid phase change material have been produced for heat storage applications. Porous aluminium/stearic acid composite structures were produced by infiltrating stearic acid PCM into open- cell porous aluminium materials prepared by using dissolvable spherical salt beads in combination with vacuum casting process. Scanning electron microscopic analysis has been used to characterize the empty porous aluminium materials and the results reveal a cellular structure consisting of spherical pores which are interconnected with smaller windows. The thermal response of empty porous aluminium structures and those infiltrated with stearic acid was measured using an infrared camera. The result showed that the heat transfer performance of the PCM thermal composites was significantly improved and largely dependent on the relative density of the porous structures.
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
Enhanced thermal conductivity of epoxy matrix composites filled with boron ni...IAEME Publication
The present paper deals with the estimation of thermal conductivity of epoxy Composites embedded with boron nitride (BN) micro-fillers. These composites with BN content ranging from 0 to 11.3 vol. % have been prepared and the thermal conductivities of the samples are measured experimentally.
Solar thermal control of building integrated phase change materials an experi...eSAT Journals
Abstract
In the present paper, we study experimentally the thermal behavior of phase change material (PCM) for thermal control of indoor
applications. The experimental setup consists of two full scale identical concrete cavities, situated in Faculty of Sciences Aïn
Chock in Casablanca- Morocco (33°36'N, 07°36'W). The first cavity incorporates paraffinic phase change material with melting
temperature of 22 °C and second cavity is built with alveolar bricks. The test cells are equipped by set of thermocouples and heat
flux meters connected to data logger. Thermal analysis for the two cubicles was conducted. The results show that inner
temperature swings decreases remarkably in the cavity with PCM with temperature minima 3 °C upper to the case without PCM.
On the other hand, there is time shift between PCM cavity and the reference cavity temperature oscillations. The integration of the
phase change material on the roof of the building reduces the temperature of internal walls as it has good thermal inertia. When
PCM panel covered the roof, solar heat transmission is reduced. This significantly reduces the ambient temperature of the cell.
This demonstrates the ability of PCM to increase the thermal comfort of buildings.
Keywords: PCM, Thermal Comfort, Building, Passive Solar Heating, Heat Storage. Melting, Solidification
Fabrication of new ceramics nanocomposites for solar energy storage and releasejournalBEEI
The carbides nanostructures have huge applications in renewable energy fields such as the saving of solar energy and release which attributed to the good their properties (thermal, electrical, mechanical, optical and chemical). So, in this paper, the solar energy storage and release of carbides nanoparticles/water for building heating and cooling applications have been investigated with different concentrations of metals carbides nanoparticles (tantalum carbide-silicon carbide). The results showed that the melting and solidification times for thermal energy storage and release decrease with an increase (TaC-SiC) nanoparticles concentrations. From the obtained results, the TaC/SiC nanostructures/ water nano-system are considered as promising materials for solar energy storage and release with high efficiency and high gain (more than 50% compare with the water). Also, the TaC/SiC may be used for heating and cooling fields with good performance and high gain.
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.
Similar to IRJET- Literature Review on Energy Storage Materials (20)
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
HEAP SORT ILLUSTRATED WITH HEAPIFY, BUILD HEAP FOR DYNAMIC ARRAYS.
Heap sort is a comparison-based sorting technique based on Binary Heap data structure. It is similar to the selection sort where we first find the minimum element and place the minimum element at the beginning. Repeat the same process for the remaining elements.