Weather influence on the performance of solar collector

A laboratory-scale evacuated tube solar collector (ETSCs) has been developed and tested for unloading conditions in Lanzhou, China. clear sky cloudy have tested. Heat is generally considered instantaneous because it a function of multiple factors, like ambient temperature radiation. The results show day with maximum average value temperature, outlet, inlet, radiation 12 -60C, 56 310C, 69 340C, 931 576W/m2, respectively, while was eight -30C 861.2 449W/m2 respectively. Clear the mass flow rate 0.25 0.21 Kg/sec, 0.27 0.03 heat loss -0.307 -0.05kW day. R square were 0.76 0.4 day, For correlation relationship, slope 0.0029 0.0539 In other conditions, per unit area increases by 1 W/m2, daily collected. Increasing difference between hot water storage tank environment one °C, collection decreases W/m2. It concludes that much better efficiency than