The hybrid photovoltaic solar-assisted heat pump are primarily used to generate electricity and provide thermal energy for heating applications.This study investigates the performance enhancement of a hybrid Photovolt...The hybrid photovoltaic solar-assisted heat pump are primarily used to generate electricity and provide thermal energy for heating applications.This study investigates the performance enhancement of a hybrid Photovoltaic Thermal Solar-Assisted Heat Pump(PV/T-SAHP)system integrated with a solar tracking mechanism.The system was simulated using TRNSYS to evaluate its monthly electrical output and coefficient of performance(COP)of the heat pump system over a year.The results showed a significant improvement in energy generation and efficiency compared to a conventional PV/T system without SAHP system.Overall,the solar tracking configuration of the PV/T-SAHP generated 10%–40%more electricity than the fixed system.The system for the tracking mode achieved a maximum monthly average electrical energy output of 634.349 kWh in June.Throughout the year,the tracking mode consistently outperformed the fixed mode.During the winter months of January and December,the tracking system produced 328.7 and 323.6 kWh,respectively,compared to 297.8 and 299.7 kWh for the fixed mode.The highest COP of 5.65 occurred in July,indicating a strong seasonal correlation with solar irradiance.In contrast,the minimum COP of 4.55 was observed in the months,February and March,reflecting reduced solar availability.The solar tracking feature consistently maintained an optimal panel angle,increasing energy gains and improving system efficiency.Overall,the integration of a heat pump and tracking control significantly improved system performance,making the hybrid PV/T-SAHP configuration a promising solution for year-round renewable energy generation.展开更多
以夏热冬冷地区的办公建筑为例,利用瞬态系统仿真程序(transient system simulation program, TRNSYS)构建主动式相变蓄能地板模块,建立了主动式相变蓄能地板空调系统和常规风机盘管加新风空调系统的仿真模型,对其节能性和经济性进行模...以夏热冬冷地区的办公建筑为例,利用瞬态系统仿真程序(transient system simulation program, TRNSYS)构建主动式相变蓄能地板模块,建立了主动式相变蓄能地板空调系统和常规风机盘管加新风空调系统的仿真模型,对其节能性和经济性进行模拟计算.以典型日和供冷季晚间蓄冷运行工况为条件,研究冷冻水温对主动式相变蓄能地板的蓄释能特性、室温波动与热泵制冷系数的影响.结果表明:夜间相变蓄冷工况下,在满足每平方米冷负荷为74.78 W情况下,9℃为最佳供水水温;采取晚间低电价时段间歇运行蓄冷热泵的方案,能够有效提高热泵运行时的制冷系数,并降低运行费用;主动式相变蓄能地板空调系统供冷季的能耗相比于常规风机盘管加新风空调系统减少30.5%,运行费用减少44.24%,夏季制冷综合能效比达到了2.38.展开更多
文摘The hybrid photovoltaic solar-assisted heat pump are primarily used to generate electricity and provide thermal energy for heating applications.This study investigates the performance enhancement of a hybrid Photovoltaic Thermal Solar-Assisted Heat Pump(PV/T-SAHP)system integrated with a solar tracking mechanism.The system was simulated using TRNSYS to evaluate its monthly electrical output and coefficient of performance(COP)of the heat pump system over a year.The results showed a significant improvement in energy generation and efficiency compared to a conventional PV/T system without SAHP system.Overall,the solar tracking configuration of the PV/T-SAHP generated 10%–40%more electricity than the fixed system.The system for the tracking mode achieved a maximum monthly average electrical energy output of 634.349 kWh in June.Throughout the year,the tracking mode consistently outperformed the fixed mode.During the winter months of January and December,the tracking system produced 328.7 and 323.6 kWh,respectively,compared to 297.8 and 299.7 kWh for the fixed mode.The highest COP of 5.65 occurred in July,indicating a strong seasonal correlation with solar irradiance.In contrast,the minimum COP of 4.55 was observed in the months,February and March,reflecting reduced solar availability.The solar tracking feature consistently maintained an optimal panel angle,increasing energy gains and improving system efficiency.Overall,the integration of a heat pump and tracking control significantly improved system performance,making the hybrid PV/T-SAHP configuration a promising solution for year-round renewable energy generation.
