考虑需求响应的蓄能空调系统灵活用能实验研究
摘要：由于实际建筑冷热负荷存在较大波动，空气源热泵系统经常面临频繁启停，灵活利用储能水罐装置可解决该问题并提升空调系统的运行效率。搭建了可灵活调控储能水罐的空调系统，利用变风量实验平台，对冬夏两季储能水罐作为缓冲装置的运行机理和作为主动储能装置参与需求响应的运行情况进行了研究与分析。通过实验验证了主动储能系统的可行性，从系统水温、能耗及运行费用方面分析了不同策略的运行效果。结果表明：在“大流量、小负荷”的实际运行工况下，储能水罐进出水温差弥补了组合式空调机组进出水温差较小的不足，使空气源热泵的启停次数减少；储能水罐作为主动储能装置在参与需求响应时能为电网提供稳定的削峰负荷，在非需求响应日，可实现罐内能源的有效利用。
关键词：蓄能空调灵活用能空气源热泵主动储能储能水罐需求响应启停次数
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Experimental study on flexible energy utilization of energy storage air conditioning system considering demand response
Abstract: Due to the large fluctuation of the cooling and heating load of the actual building, the air-source heat pump system is often faced with frequent start and stop. The flexible using energy storage tank can solve this problem and improve the operation efficiency of the air conditioning system. An air conditioning system with flexible regulation of energy storage tank is set up, and the operation mechanism of energy storage tank as buffer device in winter and summer and the operation of participating in demand response as active energy storage device are studied and analysed by using VAV experimental platform. The feasibility of the active energy storage system is verified by experiments, and the operation effects of different strategies are analysed from the aspects of system water temperature, energy consumption and operating cost. The results show that under the actual operating condition of “large flow rate and small load”, the temperature difference between the inlet and outlet of the tank makes up for the small temperature difference deficiency between the inlet and outlet of the combined air handling unit, then the start-stop times of the air-source heat pump are reduced. As an active energy storage device, the tank can provide a stable shedding load when participating in demand response, and effectively utilize the energy on the non-demand response day.
Keywords: energy storage air conditioning; flexible energy utilization; air-source heat pump; active energy storage; energy storage tank; demand response; start-stop time;
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