光伏-热电混合系统的综合优化

Abstract Currently, the photovoltaic-thermoelectric (PV-TEG) hybrid system has attracted attention due to its ability to use photovoltaic waste heat to improve power generation efficiency, but its overall energy conversion efficiency remains relatively low. Existing studies employ single optimization approaches and lack systematic, coordinated strategies, which constrain overall PV-TEG system efficiency. To address this issue, this study proposes a new integrated optimization framework comprising four modules, dividing the system into “PV optimization module, PV module, TEG module, and cooling module” to systematically combine photovoltaic optimization and cooling strategies, thereby constructing an integrated optimized PV-TEG system. First, by experimentally comparing different cooling methods, the impact of these methods on PV module temperature, TEG temperature difference, and system power output was analyzed, highlighting the important role of cooling methods in improving TEG performance. Secondly, regarding photovoltaic optimization strategies, the power gain and temperature control ability of different strategies were explored. Finally, the synergistic effect of photovoltaic optimization and cooling strategies was studied under varying solar radiation conditions, and the effects of diurnal and seasonal irradiance fluctuations were also considered, providing valuable insights into the long-term performance and reliability of PV-TEG systems in real-world environments. Experimental results demonstrate that this integrated optimization method significantly improves the overall performance of the PV-TEG system under different operating conditions. Compared to existing single optimization methods, the proposed integrated approach achieves more efficient energy utilization and offers new insights and research directions for PV-TEG system optimization design.