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http://hdl.handle.net/123456789/1246
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| Title: | Development of Integrated Solar Photovoltaic - Thermal System |
| Authors: | Kumar, Rajiv
Kumar, Vinod |
| Issue Date: | 28-Dec-2012 |
| Abstract: | Solar Photovoltaic is a key technology option to realize the shift to a decarbonized energy supply and is projected to emerge as an attractive alternate electricity source in the future. The solar PV manufacturing base in India comprises primarily of cell and module manufacturing. Solar PV applications in India have followed a different trend from global practices. While globally, there has been higher focus on grid connected applications, the Indian PV market has predominately focused on off-grid applications. In the Indian context, the power scenario and the nature of energy demand is highly skewed, with huge differences seen between the per capita electricity consumption in the urban and the rural areas. For a high cost resource like PV, the relevance and scope of its applications would, therefore, be vastly different from that of a developed western economy. However, the socio-economic and the geographical features of the country provide ample scope to use new, renewable energy resources like SPV. In several cases, SPV appears to be not only the most relevant option, but also a viable alternative even at the prevailing price. Now a days, SPV modules are being manufactured having the various types of solar cell using different semiconductors such as Single / multi / ribbon crystalline Silicon, Thin film Silicon, a-Si, m-Si, Gallium Arsenide, Cadmium Telluride, etc. However, Si (mono / multi crystalline) continues to be the most preferred material because it is one of the most thoroughly studied and understood material available in abundance in the purest form which allows commercial manufacturing of large area cells on a large scale. But Solar Photovoltaic cells have an inherent disadvantage of loosing their efficiency with the rise in temperature. Even a stage comes when the conversion efficiency becomes zero. In view of this fact, the study reported in the present paper, was carried out for the development of Integrated Solar Photovoltaic - Thermal System for electrical and thermal use in buildings with objective to enhance the efficiency of photovoltaic conversion by cooling SPV module with water as well as obtain hot water. It was considered that SPV module be attached to a heat exchanger to develop an integrated system The radiations falling on the SPV modules are converted to electrical output by photovoltaic cells while unutilized radiations are absorbed by the heat exchanger and cool the module for enhanced PV conversion efficiency while the heat removed is utilized for thermal use. The developed Integrated SPV/T system consists of SPV module of 33 Silicon cells in glass to glass moulding with a peak electrical output of 29 Watts generating 15 V at 2.2 V. The module has the circular solar cells area and the rest of the area is transparent. The incident solar radiation which falls on the cells generates electrical power and the rest is allowed to pass through transparent area and is collected by a selectively coated copper receiver which is just below and in close contact of the SPV module. A simple mathematical model has been described in this paper. A typical day observation has been plotted and an improvement of 10 to 15% in electrical output of integrated system is achieved as compared to the output of SPV module without cooling under similar condition. |
| Description: | National Conference Emerging trends of energy conservation in buildings Nov.01-03, 2012
CSIR-Central Building Research Institute Roorkee-247667, Uttrakhand, India. |
| URI: | http://hdl.handle.net/123456789/1246 |
| Appears in Collections: | Published Articles
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