experimental study of thermal behavior for a non-evacuated cpc collector with heat transfer oil

sustainable development would be a key solution for climate change and renewable energy plays an important role in this policy. recently, according to increase of co2 emission and other relevant impacts, solar energy has been gaining more attentions from policy makers. thus, compound parabolic concentrators collectors are considered as one of the promising applications from solar thermal advantages. therefore in this study a non-evacuated cpc collector with 2.5 of concentrating ratio and heat transfer oil as the fluid has been provided and tested under different mass flow rates (3 levels). experimental results indicate that, outlet temperature is within 80-100oc for all conditions. moreover, it was concluded that heat losses decrease, when oil mass flow rate descends, presumably wind cooling effects is a dominant factor during test periods. additionally, extracted differential temperature of oil in the collector was correlated with solar radiation and results proved system compatibility with industrial heat demands.