热泵谷电蓄热供暖系统设计匹配模式的研究

Design and Matching Mode of Heat Pump Valley Electric Storage Heating System

目的对热泵谷电蓄热供暖系统中蓄热水箱放置于热泵机组的源侧和负荷侧的设计形式、夜间谷电向水箱蓄热时为用户末端供暖的热量来源的不同匹配模式进行研究。方法利用模拟软件TRNSYS对热泵谷电蓄热供暖系统的不同设计形式和匹配模式建立仿真模型,在供暖季进行模拟分析,得到系统的性能与经济参数。通过Origin对建筑热负荷与不同设计形式之间的关系建立非线性曲线,进行拟合分析。结果源侧水箱的设计形式系统COP为2.36,耗电量为4578.10 kW·h、年电费2179.46元、初投资18080元;负荷侧水箱的3种匹配模式系统COP在3.08~3.29,耗电量在6438.12~7936.12 kW·h,年电费在2638.69~3229.88元,初投资在33580~38180元。建立的建筑热负荷与源侧水箱的设计形式之间关系的曲线表达式为y=2076.71 χ^(2)+0.96;与负荷侧水箱的设计形式的曲线表达式为y=2442.54 χ^(2)+1。结论设计形式为源侧水箱的经济性更佳,负荷侧水箱系统性能更佳;匹配模式热泵放热的经济性更佳,水箱放热的系统性能更佳。

The design form of heat storage tank placed on the source side and load side of heat pump unit in heating system of heat pump valley electric heat storage and the different matching modes of heat source for user end heating when valley electric heating tank accumulates heat at night are studied.Simulation models of different design forms and matching modes for heat pump valley electric regenerative heating system were established by the TRNSYS software,and the performance and economic parameters of the system were obtained by simulation in the heating season.And through Origin,the relationship between building thermal load and different design forms is analyzed by establishing nonlinear curve fitting.The COP of the design form system for the source side water tank is 2.36,and the power consumption,annual electricity charge and initial investment are 4578.10 kW·h,2179.46 yuan and 18,080 yuan respectively.The COP of the three matching mode system for the load side water tank is 3.08-3.29,power consumption 6438.12 kW·h-7936.12 kW·h,annual electricity fee 2638.69 yuan-3229.88 yuan,and initial investment 33,580 yuan-38180 yuan.The established curve expression of the relationship between the building heat load and the design form of the source side water tank is y=2076.71 χ^(2)+0.96.The curve expression for the design form of the load side water tank is:y=2442.54 χ^(2)+1.From the design form,the economy of the source side water tank is better,and the performance of the load side water tank system is better.From the point of view of matching mode,heat pump heat release economy is better,water tank heat release system performance is better.