光伏光热-CO2热泵热水系统运行性能模拟研究
Simulation study on operational performance of photovoltaic/thermal combined CO2 heat pump water heater systems
摘要：
针对光伏光热(PV/T)-CO2热泵热水系统,利用TRNSYS软件建立了仿真模型,并利用实测数据进行了验证。模拟了该系统在北京某目标建筑应用提供生活热水的全年运行特性和能耗特性,并与独立PV+独立CO2热泵热水系统进行了对比分析。结果表明:PV/T-CO2热泵热水系统在供全年生活热水的情况下,其全年光电性能、系统年能耗及系统COP均优于独立PV+独立CO2热泵热水系统;该系统的年平均光电效率为12.61%,比独立PV+独立CO2热泵热水系统高2.56%;年能耗为2 705.50 kW·h,比独立PV+独立CO2热泵热水系统低3.41%;年平均系统COP为3.20,比独立PV+独立CO2热泵热水系统提高了7.74%。
Abstract：
In this paper, a simulation model for the photovoltaic/thermal (PV/T) combined CO2heat pump water heater system is developed using TRNSYS software and validated using measured data. The year-round operational characteristics and energy consumption characteristics of the system are simulated for supplying domestic hot water in a target building application in Beijing, and compared with those of the independent PV and independent CO2heat pump water heater system. The results show that the annual photovoltaic performance, system annual energy consumption and system COP of the PV/T combined CO2heat pump water heater system are better than those of the independent PV and independent CO2heat pump water heater system for supplying domestic hot water throughout the year. The annual average photovoltaic efficiency of the system is 12.61%, which is 2.56% higher than that of the independent PV and independent CO2heat pump water heater system. The annual energy consumption is 2 705.50 kWh, which is 3.41% lower than that of the independent PV and independent CO2heat pump water heater system. The annual average system COP is 3.20, which is 7.74% higher than that of the independent PV and independent CO2heat pump water heater system.
Keywords:CO2 heat pump; photovoltaic/thermal (PV/T); water heater system; performance simulation; photovoltaic efficiency; energy consumption; system COP