基于土壤冷热平衡的复合能源系统运行策略研究

Operation strategy of hybrid energy system based on soil cold and heat balance

地源热泵系统因具有高效节能、安全稳定、运行费用低等优点得到了广泛的应用,但也存在系统排/取热量不均衡导致系统效率下降,甚至无法正常运行的问题。为此,许多学者提出了复合能源的解决方案。然而,土壤冷热平衡不仅与复合能源系统中地源热泵系统的能源占比有关,更与地源热泵系统运行时间有关,因此,复合能源系统运行策略的研究显得尤为重要。以北京市某宿舍建筑为例,利用DeST软件计算了全年逐时动态负荷,采用GLD软件模拟了系统不同控制策略下的运行状态,得出了既能满足土壤冷热平衡需求,又能保证系统高效运行的最佳运行策略。

Ground source heat pump systems are widely used because of their high efficiency,energy saving,safety and stability,and low operating costs.However,there are also problems that the system efficiency is reduced due to the imbalance between the system’s heat rejection and heat extraction,and even the normal operation is not possible.Therefore,many scholars propose the solutions of hybrid energy.However,the soil cold and heat balance is not only related to the energy ratio of the ground source heat pump system in the hybrid energy system,but also related to the operating time of the ground source heat pump system.Therefore,the research on the operation strategy of the hybrid energy system is particularly important.Taking a dormitory building in Beijing as an example,using DeST software to calculate the hourly dynamic load throughout the year,and using GLD software to simulate the operating status of the system under different control strategies,concludes the best operating strategy that can not only meet the requirements of soil cold and heat balance,but also ensure the efficient operation of the system.