THERMAL PERFORMANCE ENHANCEMENT OF SOLAR PARABOLIC TROUGH COLLECTOR USING SECONDARY REFLECTOR

摘要

The slight misalignment in the focal of a parabolic trough collector (PTC) resulted in moreheat losses and lower thermal efficiency due to seasonal movement of the Sun. With a negligible change inthe intercept factor, the secondary reflectors are attached over the receiver to reflect the concentratedsolar rays again on the receiver. Thermal performance of PTC is carried out numerical andexperimentally. Use of secondary reflector improves the thermal efficiency by 10 and the heat loss fromthe PTC has been reduced by 0.5 kJ/s.