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为降低系统运行能耗和提高出口热水可利用性,提出一种新型采用定容式冷却的低倍聚光光伏/光热(PVT)系统。于南京选择一晴朗天气,在进水温度为20℃和出水温度为40℃的条件下,进行室外实验。实验结果表明该系统的热效率可达39.4%,电效率可达14.1%。同时,还采用有限容积法对该系统进行建模,以实验当天的环境数据为基础对系统热性能和电性能进行模拟,模拟结果与实验吻合良好,为进一步优化该系统打下基础。
In order to reduce the system energy consumption and increase the availability of hot water for export, a new low-power concentrating PV / PVT system using constant-volume cooling is proposed. Choose a sunny weather in Nanjing, the inlet temperature of 20 ℃ and the water temperature of 40 ℃ under the conditions of outdoor experiments. Experimental results show that the thermal efficiency of the system can reach 39.4%, the electrical efficiency of up to 14.1%. At the same time, the system is also modeled by the finite volume method. The thermal and electrical performance of the system are simulated based on the environmental data of the experiment day. The simulation results are in good agreement with the experiment, laying a solid foundation for further optimization of the system.