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针对武汉地区混合式热泵系统在运行时出现的热积累现象,利用Fluent软件建立武汉地区某办公楼的冷却塔-土壤源热泵模型,并在传统的温差控制策略的基础上提出两种控制策略——夜间冷却塔运行策略和夜间热泵制热工况运行策略。通过模拟研究,比较3种控制策略的优缺点,发现夜间热泵制热工况运行的控制策略可对土壤起到较好的降温作用,可有效解决系统长期运行热积累的问题。
Aiming at the heat accumulation phenomenon of the hybrid heat pump system in operation in Wuhan area, a cooling tower-soil source heat pump model of an office building in Wuhan area was established by Fluent software. Based on the traditional temperature difference control strategy, two control strategies were proposed - Operation strategies of night cooling tower and nighttime heat pump heating condition. Through the simulation study, the advantages and disadvantages of the three control strategies are compared. It is found that the control strategy of the nighttime heat pump heating operation can reduce the temperature of the soil and solve the problem of long-term heat accumulation.