对一台家用空气源热泵热水器进行冬季性能测试,研究室外空气温度、水箱温度不同时机组性能变化。基于测试数据分析影响机组性能的敏感因素,依据所得天津地区实测数据分析其冬季平均能效。结果表明：COP最低为1.30,具有节能效果;保证用水舒适度及机组运行稳定的情况下,45 ℃为水箱最佳设定温度;室外空气温度偏移较水箱平均温度偏移对系统性能更敏感;测试工况下热泵机组单独工作和启动电辅加热时全冬季的平均能效相差甚微,若用户设定机组在日最高温度时段开启加热,能获得更好的节能效果。
Abstract
The performance of a small household air source heat pump water heater was tested in winter, and the performance changes of the unit were studied when the outdoor air temperature and water tank temperature were different. Based on the test data, the sensitive factors affecting the unit performance are analyzed,and the average energy efficiency in winter is analyzed according to the measured data in Tianjin. The results show that the lowest COP is 1.30, which has energy-saving effect, under the condition of ensuring water comfort and stable operation of the unit, 45 ℃ is the best set temperature of the water tank. The outdoor air temperature offset is more sensitive to the system performance than the average temperature offset of the water tank. Under the test conditions,there is little difference in the average energy efficiency of the whole winter when the heat pump unit works alone and starts the electric auxiliary heating.If the user sets the unit to start heating at the highest temperature of the day,better energy-saving effect can be obtained.
关键词
能效分析 /
空气源热泵 /
热水器 /
环境温度 /
寒冷地区
Key words
efficiency analysis /
air source heat pump /
water heater /
ambient temperature /
cold area
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基金
国家自然科学基金（52178083）; 天津市研究生科研创新项目（2020YJSS083）
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