复合补热地源热泵系统设计方法研究与应用

摘要

基于地源热泵系统在北方地区长期运行的土壤热不平衡问题，提出了一种复合补热地源热泵系统，研究表明其具有良好的应用效果及节能潜力。为保证该系统规范、合理地推广应用，基于 TRNSYS 平台提出了该复合补热地源热泵系统的设计方法。该方法包括建筑负荷计算、地源热泵机组选型、地埋管换热器设计、水泵选型、复合补热机组选型5个流程，通过预估设计和调试设计2个阶段保证了系统的供热可靠性、土壤全年热平衡、土壤温度稳定波动及热泵机组的性能水平。以一个工程为例，详细阐述了具体的设计过程。%To eliminate the soil thermal imbalance of ground-source heat pump system (GSHP)in cold region,proposes a hybrid ground-source heat pump system with heat compensation.The previous studies approve that the proposed system is energy-efficient and has great potential for application.To promote its application normally and reasonably,presents the design method based on TRNSYS.This design method includes five parts:calculation of building load,selection of GSHP unit,design of ground-source heat exchangers,selection of water pump and heat compensation unit.The predicting and adjusting period of the design method can well guarantee the system’s heating reliability,the soil’s thermal balance,the stability of soil temperature fluctuation,and the heating performance of GSHP unit.At last,taking a project as an example,demonstrates the design method specifically.