Numerical study on the optimization of air channels in PVT wall
In order to determine the optimal flow channel structure for PVT(Photovoltaic-Thermal)walls,mathematical models are established for four different types of flow channels(designated as M1～M4),and comparative analysis is conducted on their thermal/electrical performance.Firstly,the accuracy of the mathematical models is confirmed by comparing them with correlations reported in the literature.Secondly,the influence of the flow channel structure on the collection efficiency,electricity generation efficiency,and exergy efficiency is analyzed.The results indicate that the flow channel structure significantly affected the performance of PVT walls.M4 performed the best in terms of collection efficiency,reaching 44.06%when the air flow rate is 3.7×10-2kg/s.In terms of electricity generation efficiency,M1 performed the best,followed by M3 and M2,with M4 being the lowest.Regarding exergy efficiency,when the air flow rate is less than 0.0184 kg/s,M1 shows the highest exergy efficiency;while when the air flow rate exceeded 0.0184 kg/s,M3 exhibites the highest exergy efficiency.It is thus difficult to achieve high electricity generation efficiency and collection efficiency simultaneously within the flow channel structure of a single PVT wall.However,considering both the quantity and quality of energy produced by PVT walls,the structure of M3 could be considered the best.
NETL
NSTL
万方数据
