| 摘要: |
| 太阳能辅助土壤源热泵复合系统是严寒寒冷地区实施清洁供能的重要手段之一。在该系统中，太阳能集/蓄热系统与土壤源热泵系统有不同的连接方式和运行模式，太阳能系统的运行时间直接影响土壤的热恢复程度。本文基于TRNSYS平台建立了可全年进行蓄热的太阳能辅助土壤源热泵复合系统，提出了独立双埋管土壤蓄热器模拟计算方法，并与现场测试数据进行了对比验证。基于大连市公共建筑实际工程，通过正交试验设计及TRNSYS模拟全面研究了系统运行参数，得到对系统运行能耗与土壤温度变化率有重要影响的运行参数并分析了其影响规律。结果表明：系统运行能耗与冬季热泵供水温度、负荷侧水流量、土壤侧水流量均呈正相关，与夏季热泵供水温度呈负相关；当累计供热供冷量比为1.31时，系统运行能耗与蓄热启动温度呈负相关；当累计供热供冷量比为2.32时，与蓄热启动温度为正相关；当累计供热供冷量比为1.77时且蓄热启动温度为35 ℃时，系统运行能耗最低。土壤温度变化率与蓄热启动温度呈负相关。应根据系统累计供热供冷量比来相应调节太阳能系统运行时间和运行参数。 |
| 关键词: 太阳能 土壤源热泵 TRNSYS 模型建立 影响因素 |
| DOI： |
| Received:March 13, 2022Revised:March 14, 2022 |
| 基金项目:国家自然科学基金（52078097）资助项目。 |
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| Model and Parametric Analysis of Solar-assisted Ground-source Heat Pump System with Dual Independently Buried Tubes |
|
Wang Yun, Duanmu Lin, Li Xiangli, Tong Cang
|
| (Faculty of Infrastructure Engineering, Dalian University of Technology) |
| Abstract: |
| A solar-assisted ground-source heat pump system is an excellent way of supplying clean energy in extremely cold regions. In this system, the solar energy collection and storage system has different connection and operation modes from the ground-source heat pump system. The running time of the solar system directly affects the thermal recovery characteristics of the soil. In this study, a solar-assisted ground-source heat pump system with annual heat storage was established based on the TRNSYS platform. A simulation calculation method for a soil heat accumulator with double independently buried pipes was proposed. The simulation results were compared to the field test data. Based on the actual project of a public building in Dalian, the operating parameters, which greatly influence the total operating energy consumption and the soil temperature change rate of the system, were obtained using an orthogonal experimental design and TRNSYS simulation. Their influence laws were subsequently analyzed. The results showed that the total operating energy consumption of the system positively correlated with the water supply temperature of the heat pump in winter, load-side water flow rate, and soil-side water flow rate. It negatively correlated with the water supply temperature of the heat pump in summer. When the cumulative heating and cooling capacity ratio was 1.31, the total operating energy consumption of the system negatively correlated with the start-up temperature of the heat storage. When the ratio was 2.32, it positively correlated with the start-up temperature of heat storage and when the ratio was 1.77, the start-up temperature of heat storage was 35 °C, and the energy consumption of the system was the lowest. The change rate in the soil temperature is negatively correlated with the start-up temperature of heat storage. The operating time and parameters of the solar system were adjusted according to the heating and cooling ratios of the system. |
| Key words: solar energy ground-source heat pump TRNSYS model establishment influence factors |
