不同气候特征下太阳能-空气源热泵结合方式对复合供暖系统性能的影响研究
Influence of solar-air-source heat pump combination methods on performance of composite heating systems under different climatic characteristics
摘要：
为探究不同太阳能-空气源热泵结合方式对复合供暖系统的影响,分别模拟计算了空气源热泵(ASHP)、并联式太阳能-空气源热泵(PC-SAHP)和太阳能-空气源双源热泵(DS-SAHP)3种供暖系统在6个代表城市供暖季的运行能耗,对比分析了3种系统在不同气候特征下的节能性和经济性,探究了集热面积对DS-SAHP系统节能性和经济性的影响规律。结果表明:DS-SAHP系统能够提高集热效率和太阳能利用率,进而提升系统年平均COP,相比ASHP系统,其最大提高率达36.5%,除济南外,DS-SAHP系统在不同地区均具有最低的全寿命周期成本,最大降低率达11.5%;DS-SAHP系统年平均COP在不同地区均随集热面积增大而升高,而系统全寿命周期成本随集热面积增大呈现不同规律,应根据实际需求权衡判断系统节能性和经济性,以确定最优集热面积。
Abstract：
To explore the influence of different combination methods of solar-air-source heat pumps on composite heating systems, this paper simulates and calculates the operating energy consumption of three heating systems, namely air-source heat pump (ASHP), parallel-connected solar-air-source heat pump (PC-SAHP), and dual-source solar-air-source heat pump (DS-SAHP) during the heating season in six representative cities. The energy-saving and economic performance of the three systems under different climate characteristics are compared and analysed, and the influence law of the collector area on the energy-saving and economic performance of the DS-SAHP system is explored. The results show that the DS-SAHP system can improve the heat collection efficiency and solar energy utilization rate, thereby increasing the annual average COP of the system. Compared with the ASHP system, its maximum increase rate is up to 36.5%. Except for Jinan, the DS-SAHP system has the lowest life cycle cost in different regions, with a maximum reduction rate of 11.5%. The annual average COP of the DS-SAHP system in different regions increases with the increase of collector area, while the life cycle cost of the system shows different laws with the increase of collector area. The energy-saving and economic performance of the system should be weighed and judged according to actual needs to determine the optimal collector area.
Keywords:solar energy; air-source heat pump; composite heating; dual-source heat pump; heating system; life cycle; energy-saving performance; economic performance