基于负荷率的冷却塔复合式土壤源热泵系统的控制策略研究

Study on the Control Strategy for Hybrid Ground Source Heat Pump System with Cooling Tower Based on Load Rate

本文针对冷却塔复合式土壤源热泵系统提出了一种基于负荷率的控制方式,以一栋图书馆建筑为例,采用TRNSYS软件建立复合式土壤源热泵系统模型,对基于负荷率控制的地埋管优先运行和冷却塔优先运行的两种方案的热源侧温度工况以及系统能耗进行计算分析,结果表明冷却塔优先运行的方案能耗更低。本文提出的控制方式以及采用的计算分析方法可用于冷却塔复合式土壤源热泵系统的设计。

In this paper, a control strategy based on the load rate was presented for hybrid ground source heat pump system with cooling tower. Taking a library as an example, two programs were proposed. The first program was the ground heat exchanger that had a priority in operation of buried pipe ; while for the second program, such a priority was given to the cooling tower. Model of the system was established based on TRNSYS. Moreover, both the source temperature and energy consumption were calculated and analyzed for two programs. The corresponding results showed that the second program had the lower energy consumption. Such a control strategy and the calculation method which were presented in this paper pump system with cooling tower. could be used for the design of hybrid ground source heat