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模拟分析了一种直热空气源变频热泵热水系统,包括水箱模块与热泵模块的理论耦合特性和热泵系统在变工况下的运行特性,并且比较了压缩机频率每变化1Hz和冷凝温度每变化1℃对系统的影响.模拟分析表明:压缩机功率随环境温度变化的趋势为抛物线状,在20℃左右达到最高;制热量与环境温度呈正线性相关;热泵模块出热水流量随环境温度变化呈指数增长;当压缩机有效容积和吸气系数等参数不变时,制冷剂质量流量与环境温度呈正线性变化;制热COP随环境温度呈指数增长,随出水温度的升高而降低;调节频率可以更有效改善系统制热量,而降低冷凝温度从而适当降低用水温度(如42℃),可以更有效地降低功耗、增加出水流量.
A direct hot air source frequency conversion heat pump hot water system is simulated and analyzed, including the theoretical coupling characteristics of the water tank module and the heat pump module and the operating characteristics of the heat pump system under varying operating conditions. Comparisons of the compressor frequency change 1Hz and the condensing temperature And the influence of 1 ℃ on the system is simulated.The simulation results show that the trend of the compressor power with the ambient temperature is parabolic and reaches the highest at around 20 ℃ .The heating capacity is positively correlated with the ambient temperature.The heat flow rate of the heat pump module varies with the ambient temperature When the parameters such as the compressor effective volume and the suction coefficient are constant, the mass flow of the refrigerant changes linearly with the ambient temperature. The COP of the heating system increases exponentially with the ambient temperature and decreases with the rise of the outlet water temperature. Adjusting the frequency can effectively improve the heating capacity of the system. Lowering the condensing temperature and appropriately lowering the temperature of the water (such as 42 ° C) can reduce the power consumption and increase the output flow more effectively.