地源热泵有限长圆柱面和圆柱体热源模型  

Finite long cylindrical surface and cylinder source model of ground source heat pump

作　　者：战国会[1] 俞亚南[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2011年第6期1104-1107,共4页Journal of Zhejiang University：Engineering Science

摘　　要：为进一步提高地源热泵解析模型的精度,对地源热泵钻孔外非稳态温度场模型进行了研究.考虑地面边界条件、钻孔的有限深度及热流在钻孔径向的分布,提出有限长圆柱面和圆柱体热源模型.在地面以上设虚拟热汇,把温升看成时间、空间上连续的瞬时点热源温度响应的叠加,即采用格林函数法,得到这2种模型的温升解析解.与实验数据对比表明:2种模型可以更精确地计算钻孔外非稳态温度场.计算结果也表明:圆柱面模型和圆柱体模型计算得到的结果差异不大,在计算量上圆柱面模型要小些,因此,在实际应用中推荐采用圆柱面模型.Analytical models of the unsteady thermal field outside the hole wall of ground source heat pump were studied in order to further improve the accuracy.Finite long cylindrical surface and cylinder source model were put forward considering the boundary conditions of ground surface,the depth of bore and the distribution of heat flow in radical direction.A virtual heat sink was assumed above the surface,and the temperature rise was regarded as superposition of responses of transient point heat source which was continuous both in time and space,that was the method of Green＇s function,then analytical solutions of the two models were derived.The two models were demonstrated more precise by comparing with the experimental results.The results of the cylindrical surface source model are close to those of the cylinder source model but the calculation amounts are smaller,so the cylindrical surface source model is recommended in practical application.

关 键 词：地源热泵 传热模型 圆柱面热源模型 圆柱体热源模型 

分 类 号：TU111[建筑科学—建筑理论]