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标题：Thermal Performance Study on Parametric Variation of Storage Volume of Water Loaded in a Small and a Domestic Size Experimental Shallow Solar Ponds (SSP)
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作者：Ganesh.S ; Arumugam. S
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
期号：ICMEET
页码：370
出版社：S&S Publications
摘要：The thermal performance of a small size and a domestic size Shallow Solar Pond (SSP) have beeninvestigated by varying the volume of water stored in the SSPs and their performance are compared. The thermalperformance curve for SSPs has been obtained and from the curve the heat loss coefficient of the SSPs has beenexperimentally determined. A small size shallow solar pond have been fabricated using a ceramic sink of size 0.47mx 0.30m x 0.13m and was properly insulated along the inside bottom and side walls with black Polyurethane foam(PUF) in sheet form of thickness 12mm. A Low Density Polyethylene (LDPE) black sheet liner of 200 micrometerthickness has been laid all along the bed side and inner peripheral sides for better solar energy capture. Once the studyvolume of water is loaded in the SSP, a clear transparent PVC sheet of 150 micrometer thickness was laid over the topsurface of water and used as evaporation suppressing membrane. A single transparent glass cover of 5mm thicknesswas fixed for air leak proof on top of SSP inorder to reduce the convective heat losses due to wind effect. Copper -constantan thermocouples have been used in different numbers to measure the temperature at different locations of theSSP system. Small size SSP was made for a maximum storage volume of 10 liters and the study was conducted initiallyloaded with 2 liters of water and further studies were made for the increased storage volumes of water in steps of 2liters upto 10 liters. It is inferred from the obtained results that the temperature attained by the small size SSP wasfound to have maximum at 81.50C, 74.20C, 710C, 66.50C, 700C for the storage volumes of 2, 4, 6, 8, 10 litersrespectively. The mean instantaneous heat collection efficiency was estimated as 37.2% and the estimated mean heatloss coefficient was 4.23 W/m2 0C. The mean τα product of the system is estimated as 0.48. A domestic size shallowsolar pond has been fabricated inorder to hold larger volume of water, using a metal tray made of GI sheet of size1.02m x 0.68m x 0.10m and was tested for its performance for the increased storage volumes from 15 liters to 50 litersin steps of 5 liters a day. The domestic size SSP has attained maximum temperatures of 870C, 83.30C, 88.30C, 86.30C,75.40C, 700C, 620C, 75.50C, when the domestic SSP loaded with the storage volumes of 15, 20, 25, 30, 35, 40, 45, 50liters respectively. The mean instantaneous heat collection efficiency was estimated as 51.5% and the estimated meanheat loss coefficient was 3.84 W/m2 0C. The mean τα product of the system is estimated as 0.68. The maximumtemperature of the SSP water was found to be decreasing with the increase in the storage volume of water. The shallowsolar pond of the type discussed here could be utilized as a source of hot water which could be suitably used for thedomestic and industrial heat applications process. A large size shallow solar pond of similar type could providenecessary hot water for the generation of even electrical power when properly designed and coupled through an ORCengine.
关键词：Shallow solar pond; Storage volume variation; Instantaneous efficiency; Thermal performance curves;Overall heat loss coefficient