ENERGY AND EXERGY EFFICIENCY ANALYSIS OF A SOLAR CONCENTRATING PV/T AIR HEATING COLLECTOR

In this work,a one-dimensional steady heat transfer model for a solar concentration PV/T system with fins is developed.The thermal,electrical,exergy and net electrical efficiencies are simulated.The effects of air mass flow rate,incident solar intensity and wind velocity on air temperature and the efficiencies of the air collector are analyzed.Results show that the air temperature difference,thermal and exergy efficiency increase with incident solar intensity increasing, but the electrical efficiency decreases.The air temperature rises and net electrical efficiency decreases with the air mass flow rate increasing.The calculated results indicated that the exergy efficiency is 18%～11%,the thermal efficiency is higher than 65%.The net efficiency is lower than 2%,but the air mass flow rate has obvious effects on it.