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Title: Experimental studies on the solidification behaviour of a phase change material in a vertical concentric cylinder
Researcher: Ravikumar solomon G
Guide(s): Velraj R
Keywords: Heat Transfer Fluid
Latent heat thermal energy storage systems
Mechanical Engineering
Phase Change Material
Vertical concentric cylinder
Upload Date: 10-Mar-2014
University: Anna University
Completed Date: 01/10/2013
Abstract: In the eighties, researchers were interested in reducing the cost of newlineenergy and save the depleting fossil fuels. However, recently the importance newlinehas shifted from these goals towards the environmental perspective, with the newlineaim of reducing the pollutant emissions such as carbon dioxide, chloro fluro newlinecarbons etc. The dual challenge is how to meet the world s growing energy newlineneeds, while reducing the impact of energy use on the environment. This has newlineled to the utilization of sustainable energy sources and energy conservation newlinemethodologies. The building cooling is responsible approximately 40% of the newlinetotal world annual energy consumption. The concept of free cooling of newlinebuildings has gained a lot of attention among the researchers and engineers in newlinerecent years, as it reduces / eliminates the load on the conventional air newlineconditioning systems employed in building cooling, by avoiding the operation newlineof energy intensive air conditioning compressors. The Phase Change Material (PCM) based thermal energy storage systems, also known as latent heat newlinethermal energy storage systems (LHTES) have received greater research newlineattention in free cooling applications, to store the cool energy available in the newlineambient during the early morning hours, and to utilize the stored cool energy newlinefor the space cooling of buildings during the day time. newlineDuring the phase change in the LHTES units, the solid liquid newlineinterface moves away from the heat transfer surface. In this process, the newlinesurface heat flux decreases with respect to time, due to the increasing thermal newlineresistance of the growing layer of the molten/solidified medium, as the newlinethermal conductivity of the solidified PCM is very low. For most of the available PCMs, the Biot number (Bi= hR/k) becomes larger as the thermal newlineconductivity is very low, and the surface temperature of the PCM drops newlinewithin a short period after solidification is started, and this results in a very newlinelow heat flux thereafter. newline
Pagination: xix, 138p.
Appears in Departments:Faculty of Mechanical Engineering

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01_title.pdfAttached File17.03 kBAdobe PDFView/Open
02_certificates.pdf1.89 MBAdobe PDFView/Open
03_abstract.pdf12.68 kBAdobe PDFView/Open
04_acknowledgement.pdf6.59 kBAdobe PDFView/Open
05_contents.pdf24.28 kBAdobe PDFView/Open
06_chapter 1.pdf2.9 MBAdobe PDFView/Open
07_chapter 2.pdf59.41 kBAdobe PDFView/Open
08_chapter 3.pdf15.46 MBAdobe PDFView/Open
09_chapter 4.pdf4.04 MBAdobe PDFView/Open
10_chapter 5.pdf223.81 kBAdobe PDFView/Open
11_chapter 6.pdf20.79 kBAdobe PDFView/Open
12_appendix.pdf2.29 MBAdobe PDFView/Open
13_references.pdf27.19 kBAdobe PDFView/Open
14_publications.pdf10.28 kBAdobe PDFView/Open
15_vitae.pdf7.28 kBAdobe PDFView/Open

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