Study on Thermal Performance of a Solar Water Heater with Photovoltaic DC Water Pump
A set of horizontal double-row separated all-glass evacuated tube solar water heating system installed with photovoltaic DC pump was tested to study and analyze the effect of photovoltaic DC pump on the thermal performance of the system.The results showed that,compared with the conven-tional natural circulation system,the PV DC pump reduced the daily useful heat gain of the solar water heating system by 0.77 MJ/m2,and the thermal efficiency was reduced by 4.5％,but the distribution of the water temperature in the water storage tank was more uniform,and the average temperature difference between the upper and lower hot water storage tanks was only 1.46 ℃.
Photovoltaic DC water pumpSolar water heating systemThermal performanceOperating characteristics
万方数据
维普
