Abstract:

Focusing on the problem of difference in the heating load between day and night for office building, which leads to sharp fluctuation in the power consumption of heat pump heating system within a day, thermal storage and heating system using heat pump that suppresses power consumption fluctuations is built, and optimization control strategy is proposed. Taking the stability of power consumption and lower electricity cost as the objective function, the parameters of heat storage and heating are optimized. Based on the weather parameters of Tianjin and one office building with 9000m², the optimization in electricity consumption of the heat pump thermal storage and heating system is carried out. The results indicate that when thermal energy storage is added and the operation parameters is optimized, the valley power consumption is increased and the peak power load is reduced, which achieves the stable electricity consumption during one day. On typical days of heating, the power consumption during peak hours and hourly power consumption on typical day reduces 50.29% and 28.10%, respectively, and the hourly power consumption is stable at 53.54kW throughout the day. Compared with the conventional heat pump heating system without heat storage, the fluctuation of power consumption is greatly cut down and the total operating cost is reduced during the whole heating period.

Key words: suppression in power consumption fluctuation, heat pump thermal storage-heating system, operation optimization strategy, power consumption, operating cost

摘要：

针对办公建筑物昼夜热负荷需求存在差异，从而导致热泵供热系统一天内电力供给需求波动较大的问题，本文构建了平抑电能消耗波动的热泵蓄热-供热系统，并提出了对应的优化运行策略。以热泵蓄热-供热系统耗电功率稳定及耗电成本最低作为优化目标函数，对蓄热和供热参数进行了优化分析。基于天津地区气象参数，根据某9000m²办公楼能耗，对所构建的可平抑电耗的热泵蓄热-供热系统进行了优化分析，结果表明：采用热泵蓄热并对运行参数进行优化控制后，系统的谷电电耗增加，峰电负荷降低，实现了供热系统日耗电功率恒定，典型日高峰时段系统耗电功率最大降低50.29%，日间平均耗电功率降低28.10%，全天耗电功率稳定于53.54kW；与无蓄热常规热泵供热系统相比，整个供热期的电耗波动大幅下降，总运行费用降低。

关键词: 抑制电耗波动, 热泵蓄热-供热系统, 运行优化策略, 耗电功率, 运行成本