铁路站房地源热泵系统工程热平衡分析

Analysis on Heat Balance of Ground Source Heat Pump System in Railway Station

结合具体工程,根据某车站空调采暖系统设计工况及该工程地埋管换热特性测试报告,采用地源热泵系统作为冷热源。考虑地源热泵系统的冷热平衡需要,分析采用地源热泵+锅炉辅助系统及太阳能地源热泵耦合系统两种不同热平衡方案用于铁路站房,计算各自需要的热泵机组容量及室外埋管换热器具体设计规模。详细介绍两种系统的冷热平衡方式,并对各自特点及工程运用进行论述,提出在具体工程中因地制宜,应根据不同情况,采用合适的系统热平衡方式。

In regard to an actual railway station, based on its design circumstance of air-condition heating system and its testing report of ground heat transfer characteristics, the ground source heat pump system was adopted as its cold and heat source. Considering the need for heat balance of the ground source heat pump system, this thesis analyzes the two different schemes used in railway station buildings： the one is a ground source heat pump system assisted by boiler, and the other is a coupled system of solar energy with ground source heat pump. And then respectively for both schemes, this thesis calculates the required capacity of ground source heat pump unit and the required design scale of ground heat exchanger. This thesis also discusses how to achieve the cold and heat balance for the two different schemes, and analyzes each characteristics and applicability in actual projects. Finally this thesis points out： it is necessary to use suitable and customized heat balance modes for different projects on the basis of local conditions.