Numerical Simulation on Performance of Finned-Built-Middle Photovoltaic Trombe Wall
A novel built-middle photovoltaic Trombe wall with vertical fins was proposed in this study.Based on the first and second laws of thermodynamics,the effects of fins spacing and height on the performance were numerically investigated,and the performance was compared with that of the built-middle photovoltaic Trombe wall without fins.The results show that the thermal efficiency can be effectively improved within a certain range of fins spacing and fin height.Decreasing the fins spacing and increasing the fins height can enhance the electrical efficiency.By introducing the overall exergy efficiency,it is found that the obtained electrical energy dominates the overall exergy efficiency compared to thermal energy.There exists the optimal fins spacing to maximize the overall exergy efficiency under higher fins,and increasing fins height can enhance the overall exergy efficiency of the system.The finned-built-middle photovoltaic Trombe wall has the overall exergy efficiency of 12.74％at 15.625 mm of fins spacing and 45 mm of fins height,which is an improvement of 11.29％compared to the system without fins,and has a great potential for application.
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