污水源热泵渠温受地温作用下的温变模型  

Temperature-changing model of canal temperature affected by soil temperature in sewage heat pump

作　　者：吴荣华[1] 徐莹[1] 孙德兴[1] 任南琪[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2008年第12期1986-1990,共5页Journal of Harbin Institute of Technology

基　　金：中国博士后科学基金资助项目(20060390808)

摘　　要：为更广泛地应用原生污水源热泵技术,有必要对干渠污水与土壤的耦合特性进行深入研究和分析.调查并分析干渠散热时的物理模型与边界条件,基于虚拟热源镜像法,引入并假定土壤地温及其简化条件.理论解析干渠周边土壤温度场及干渠沿程温度函数,为适于工程应用,对渠程温变模型作近似处理与示例.研究表明:干渠散热时的物理模型与边界条件复杂,难以得到精确解.可理论解析近似得到干渠与土壤传热耦合模型,温度场是以同等埋深的土壤地温为渐近线的曲面,而渠温则终将趋于埋深处的地温,由两个特征常数决定.简化的模型适宜工程应用,符合物理机理.The wide utilization of urban sewage heat pump makes it necessary to recognize the coupling characteristic between trunk canal sewage and soil. The physical model and boundary conditions were analyzed during the heat elimination of trunk canal. Based on the dummy heat source image method, the soil temperature and the simplified condition were assumed. The soil temperature field around the trunk canal and the route temperature function of the trunk canal were analyzed in theory. In order to be utilized in project, the temperature - changing model of route canal was approximately treated as an instance. The research shows that it is difficult to obtain the exact solution due to the complexity of physical model and boundary conditions. The heat transfer coupling model between trunk canal and soil can be obtained by the analysis in theory, so the temperature field is a curved face taking the soil temperature in the same depth as the asymptotic line. The canal temperature tends to approximate the soil temperature with the burying depth, and it is determined by two characteristic constants. The simplified model is suitable for projects and meets the physical mechanics.

关 键 词：污水 热泵 干渠 水温 地温 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]