CPC reflectors for enhanced solar radiation collection of an evacuated tube solar water heater

摘要

Two CPC reflector profiles have been designed for integration with commercially available Evacuated Tube Solar Water Heater (ETSWH). The optical efficiencies of the designed concentrating ETSWHs were calculated using three dimensional ray-trace and compared to that of the non-concentrating ETSWH. The potential of the designed concentrating profiles for enhancing solar radiation collection of ETSWHs in Northern Maritime climates was investigated by calculating the hourly and daily collected amounts of solar radiation on the 21st day of March, June, September and December. An increase in daily solar radiation collection of up to 14.22% over the non-concentrating ETSWH was predicted.