A Study on Renewable Energy for the Mitigation of Climate Change

A solar paraboloidal concentrating collector in a non-planar configuration using reflecting materials of reflectance is 0.7 has been thermally designed and developed and at a 1m focal distance in conjunction with a reverse flat plate absorber with black board paint (both selective and non selective coating) theoretically. To study optical and thermal performance tests like stagnation temperature (TPS), water temperature (TW), plate temperature (Tp), Thermal efficiency test (ƞc), optical efficiency test (ƞ0), Heat transfer coefficient from surface to water (U), geometrical concentration ratio (C) and overall heat loss coefficient (UL) has been studied. The concentrator is placed such that all incident parallel rays of light intercepted by the concentrator aperture area reflected to a common focus. In this case the concentrator parabolic in shape. This communication presents the thermal design analysis of a CR- system. The results of some typical numerical calculations are shown graphically and their significance is discussed. There are different kinds of solar concentrating collectors for practical utilization in different cases like solar thermal steam production and distillation, solar candle production, solar gur/ Molases production, solar soap production, solar paddy boiling, solar biscuits production, solar chocolate production, solar salt production, Tobacco curing, solar medical stearilizer etc. Although this work is done for paraboloidal dish type concentrating collector, it will also help to design and fabricate other any type of concentrating collectors for practical utilization under the climatic condition of Bangladesh. Finally, it can be concluded that is feasible and viable to mitigate climate change through Renewable Energy.