不同气候区太阳能-空气源热泵热水系统运行性能评价

本文采用非稳态制热实验方法测试空气源热泵在典型工况下的能效系数,测试不同日照强度下太阳能平板集热器的热效率,分析户用太阳能-空气源热泵热水系统在3～5人典型住宅用户热水负荷下的运行性能;选取不同气候区的代表城市,结合典型年气象数据,评价该系统在不同地区的太阳能贡献率和热水系统全年能效系数(APF)。得出:寒冷、夏热冬冷、夏热冬暖和温和地区热泵机组单独运行时系统APF_h分别为3.03、3.34、3.79、3.28;4个地区太阳能年贡献率分别为29.82%、32.07%、29.58%、38.62%,太阳能-空气源热泵组合系统APF_s分别可达3.67、4.06、4.39、4.45。

Performance Evaluation of Solar-air Source Heat Pump Hot Water System in Different Climatic Zones

To obtain the applicability and operation superiority of the solar-air source heat pump hot water system in different regions, the operation performance and energy efficiency coefficient of the air source heat pump unit and solar collector unit were tested through experiments under typical conditions. Tianjin, Shanghai, Guangzhou, and Kunming were selected for cold, hot-summer and cold-winter, hot-summer and warm-winter, and temperate regions, respectively. With the consideration of Chinese habits on domestic hot water, the performance of the heat pump system was analyzed in different areas for a typical family with 3~5 persons. The annual performance factor (APF) of a hot water system in different regions is calculated based on the weighted annual meteorological data of different cities. It is concluded that the APF of the hot water system is 3.03, 3.34, 3.79, and 3.28 in cold, hot-summer and cold-winter, hot-summer and warm-winter, and temperate regions, respectively, and the annual contribution rate of solar energy in the four regions is 29.82%, 32.07%, 29.58%, and 38.62%, respectively. The APF of the combination system can reach 3.67, 4.06, 4.39, and 4.45, respectively.