为研究太阳能光伏光热系统与多联供系统结合的运行特性,搭建太阳能光伏光热联合双源热泵系统实验台,测试系统在制热、制冷、制热水模式下的运行特性,重点分析在制热水模式与制热模式下分别从PV/T源和从空气源取热时的制热量、COP、用电量等数据以及从PV/T水箱取热对PV/T板的电效率和热效率的影响,分析系统在实际运行中的节能性。实验结果表明：在冬季低温晴朗天气的制热模式下,热泵机组平均COP为2.18,太阳能光伏光热联合双源热泵系统平均COP为3.17,其中从PV/T源取热占运行时长的61.57%;在制热水模式下,相同取热温度时,从PV/T源取热的热泵性能均优于从空气源取热;从PV/T水箱取热可有效降低PV/T板的板温,从而提高PV/T板的电、热效率。
Abstract
In order to study the operational characteristics of a combined solar photovoltaic-thermal system and multi-source heating system, an experimental platform for a solar photovoltaic-thermal combined dual-source heat pump system was constructed. The system was tested in heating, cooling, and hot water production modes, with a focus on analyzing the heat output, COP, electricity consumption, etc., when heating from the PV/T source and air source in heating hot water production and heating modes. The impact of heating from the PV/T water tank on the electrical and thermal efficiency of the PV/T panel was also examined, along with an analysis of the system's energy saving performance during actual operation. The experimental results indicate that in heating mode during cold and sunny winter weather, the average COP of the heat pump unit is 2.18, while the system's average COP is 3.17, with heating from the PV/T source accounting for 61.57% of the operating time. In the hot water production mode, at the same heating temperature, the heat pump performance is superior when heating from the PV/T source compared to heating from the air source. Heating from the PV/T water tank can effectively reduce the temperature of the PV/T panel, thereby enhancing its electrical and thermal efficiency.
关键词
热泵系统 /
光伏组件 /
性能系数（COP） /
电效率 /
热效率
Key words
heat pump systems /
PV modules /
coefficient of performance /
electrical efficiency /
thermal efficiency
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