运行频率对复合热源热泵热水器性能的影响

作者:赵伟强 刊名:建筑热能通风空调 上传者:李莹

【摘要】为了研究运行频率对复合热源热泵热水器系统性能的影响,采用变频压缩机与电子膨胀阀,构建了直膨式太阳能-空气复合热源热泵热水器实验装置,并在相近的环境工况下,针对不同运行频率,对该装置进行了性能测试。分析了运行频率的变化对加热时间,蒸发压力及冷凝压力,压缩机耗功以及系统性能系数(COP)和集热效率等的影响,并比较了运行频率的变化对系统性能参数影响的敏感程度。实验结果表明,系统平均COP随运行频率的降低而增大,高频率运行会影响系统稳定性。运行频率的变化对系统各性能参数影响的敏感程度不同,系统平均蒸发压力和压缩机的平均耗功对运行频率的变化最为敏感,其次是加热时间和系统平均COP。

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运行频率对复合热源热泵热水器性能的影响 赵伟强 东南大学能源与环境学院 摘 要: 为了研究运行频率对复合热源热泵热水器系统性能的影响, 采用变频压缩机与电子膨胀阀, 构建了直膨 式太阳能 空气复合热源热泵热水器实验装置, 并在相近的环境工况下, 针对不同运行频率, 对该装置进行了性 能测试。分析了运行频率的变化对加热时间, 蒸发压力及冷凝压力, 压缩机耗功以及系统性能系数 (COP) 和集热 效率等的影响, 并比较了运行频率的变化对系统性能参数影响的敏感程度。实验结果表明, 系统平均 COP随运行 频率的降低而增大, 高频率运行会影响系统稳定性。运行频率的变化对系统各性能参数影响的敏感程度不同, 系 统平均蒸发压力和压缩机的平均耗功对运行频率的变化最为敏感, 其次是加热时间和系统平均 COP。 关键词: 直膨式热泵 太阳能 复合热源 热水器 运行频率 The Effect of Operating Frequency on Performance of Hybrid Heat Sources Heat Pump Water Heater ZHAO Weiqiang School of EnergyandEnvironment, Southeast University Abstract: To analyze the effect of operating frequency on the performance of hybrid heat sources heat pump water heater, the experimental device of the directexpansion solarair source water heat pump was established by using a variable capacity compressor and an electronic expansion valve, and three experiments with different operating frequencywere conducted in the similar environmental conditions. The effect of operating frequencyon the heating time, evaporation pressure, condensing pressure, compressor power consumption, system performance coefficient (COP) and collection efficiency were analyzed, and the sensitivity of the effect of operating frequency on the system performance parameters was compared. The experimental results show that the average COP ofthe system increases with the decrease of the operating frequency, and the high frequency operation will affect the system stability. The change of the operating frequency has different se

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