DESIGN AND DEVELOPMENT OF COMPOSITE SOLAR APPLIANCES FOR DOMESTIC USE
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Date
2004
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MPUAT, Udaipur
Abstract
The solar energy is the source of all energy sources. It is inexhaustible, clean and renewable sources of energy and can significantly contribute the world energy requirement with available conversion technology.
This research work was undertaken with the objectives to design and develop composite solar appliances for domestic use. Two such composite solar appliances were developed. First Solar Water Heater cum Distillation device for hot water and distilled water simultaneously and second Solar Dryer cum Cooker device for cooking and drying were developed. The performance evaluation of these composite units was done and the techno-economic performances were evaluated. These solar appliances were designed and developed at department of Renewable Energy Source, C.T.A.E., Udaipur. Use of such composite solar appliances may increase the efficiency and reliability without reducing the quality of product and polluting environment.
Appliances were tested for no load condition and full load condition in winter and summer to find out its performances. During no load testing of cooking unit of solar dryer cum cooker the maximum temperatures achieved inside the cooker was 92ºC and 113º C in summer when reflector was not used. Similarly for cooker with reflector, the maximum temperatures were 112.8º C in winter and 134.2º C in summer. F1, F2 values of solar cooker were 0.119,0.120 and 0.32, 0.30 for winter and summer. Time required for rice, tur dal, mug dal was 90, 130 and 100 minutes in winter 60,90 and 75 minutes in summer. In case of dryer without reflector in no load testing, maximum temperature obtained inside the dryer was 59.66ºC in the month of November and for the month of April the maximum inside temperature attained was 63º C. The efficiency for drying maize, wheat and potato was found to be 15.55%, 10.89% and 10.42% for solar dryer in winter, 12.97%, 8.90% and 10.16% for solar dryer in summer respectively.
In solar water heater cum distillation unit the maximum temperatures of water in storage tank were 48.68ºC and 58.28ºC in winter and summer respectively. Total distilled water in 24 hours produced from SWHD in February 2004 and April 2004 was 5007 ml/m2/day and 5275 ml/m2/day
Efficiency of SWHD for winter and summer was found to be 36.70 %, 27.65 % for solar water heater, 49.55%, and 43.97% for distillation for winter and summer. The total cost of SWHD and SDC worked out to be Rs 8930 and 2715. Per day saving of SWHD and SDC would be Rs. 19.20 and Rs. 11.43 For SWHD and SDC the costs could be recovered within the period of 2.11 year and 1.1 year respectively.
Description
DESIGN AND DEVELOPMENT OF COMPOSITE SOLAR APPLIANCES FOR DOMESTIC USE
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Citation
Sengar and Kurchania, 2004