一种新型的地源换热器及其换热模型研究  

A New-style Ground-source Heat Exchanger and Its Heat Transfer Model

作　　者：龚光彩[1] 周游[1] 朱少林[1] 周建勇[1] 

机构地区：[1]湖南大学土木工程学院

出　　处：《建筑热能通风空调》2009年第1期1-5,共5页Building Energy & Environment

基　　金：国家高技术研究发展计划项目(2006AA05Z229)

摘　　要：提出了一种新型的地源换热器的设计思想,本设计换热器由两个均流静压槽及静压槽之间的换热管三大部分构成,称为鼠笼式换热器。流体经均流静压槽分流后在各换热管中同向流动,管间传热几乎可以忽略,因此,它能充分利用浅层地源,且结构简单实用,施工方便,易于维护,尤其适合我国南方广大农村和中小城镇。同时,从传热学基本原理出发,根据能量平衡方程、对流换热和导热理论,导出了相应的埋管换热简明算法模型。此模型给出了换热管管长与换热管段流体进出口温度的关系计算式。通过试验测得,该类换热器具有很好的换热效果,能充分利用浅层地源。通过模拟值与试验台实测值的比较表明,误差可以忽略。The design idea of a new-style ground-source heat exchanger is introduced. This kind of heat exchanger which is called mouse-cage heat exchanger consists of two buffers or boxes which can make static pressure and liquid distribution homogeneous and the heat-exchange pipes between them. After being distributed, the flow in all heat-exchange pipes has the same direction, so the heat loses among the pipes are eliminated. Therefore, the heat exchanger can make good use of shallow undersurface ground source. Besides, its structure is simple and feasible and it is easy to be installed and maintained. It is especially fit for country and towns. Based on the basic heat transfer theory and energy balance equations, heat convection and conduction theory, a concise arithmetic model for the design of buried heat exchangers was developed. This model presents the related equation between the length of the heat exchange pipe and the liquid temperature at the inlet and the outlet of the pipe. Measured by tests, such kind of heat exchanger has a good effect of heat transfer and can make good use of shallow undersurface ground source. The comparison between the calculation results by the algorithm and the stable measurement data in a summer in Hunan University shows that the error can be neglected for engineering applications.

关 键 词：地源热泵 换热器 换热模型 

分 类 号：TU833[建筑科学—供热、供燃气、通风及空调工程]