To explore the novel structure and optimize the performance of the photovoltaic/thermal (PV/T) system, the linear Fresnel concentrating PV/T (LFPV/T) systems plus thermoelectric generator (TEG) with and without gravity-driven heat pipe (GHP) are investigated in this paper. GHP is an efficient heat transfer device, which could collect heat accumulated on PV to the hot side of TEG. TEG can convert heat into electrical energy with a temperature gradient. In this case, the GHP-LFPV/T-TEG system is proposed. However, the increased heat flux may rise the PV temperature and decrease the output of PV cells, so the water type LFPV/T-TEG system without GHP is introduced. This research focuses on the numerical study of the two systems and the comparative analysis of the performance is completed. The results show that the existence of GHP improved the thermal and comprehensive performance of the system and the output of TEG. After running for 7 h, the thermal efficiency and the comprehensive efficiency of the GHP-LFPV/T-TEG system were 10.23% and 2.55% respectively higher compared to those of the LFPV/T-TEG system, while the electrical efficiency and exergy efficiency were 2.91% and 1.56% lower under 800 W/m² solar irradiation, 18 ℃ ambient temperature, and 15 ℃ initial water temperature. The TEG output of the GHP-LFPV/T-TEG system and the LFPV/T-TEG system was 13.64 kW and 6.41 kW respectively. Moreover, the influence of solar irradiation, concentration ratios, and TEG modules was also discussed.

为了探索新颖的结构并优化光伏/热能（PV / T）系统的性能，线性菲涅尔聚光PV / T（LFPV / T）系统加上带有或不带有重力驱动热管（GHP）的热电发电机（TEG） ）在本文中进行了研究。GHP是一种高效的传热设备，可以将PV上积聚的热量收集到TEG的热侧。TEG可以将热量转换为具有温度梯度的电能。在这种情况下，建议使用GHP-LFPV / T-TEG系统。然而，增加的热通量可能会提高光伏温度并降低光伏电池的输出，因此引入了没有GHP的水型LFPV / T-TEG系统。本研究着重于两个系统的数值研究，并完成了对性能的比较分析。结果表明，GHP的存在改善了系统的热综合性能和TEG的输出。运行7小时后，GHP-LFPV / T-TEG系统的热效率和综合效率分别比LFPV / T-TEG系统的热效率和综合效率分别高10.23％和2.55％。在800 W / m下分别降低了2.91％和1.56％²太阳辐射，18℃的环境温度和15℃的初始水温。GHP-LFPV / T-TEG系统和LFPV / T-TEG系统的TEG输出分别为13.64 kW和6.41 kW。此外，还讨论了太阳辐射，浓度比和TEG模块的影响。