技术中心

【英文篇名】 Urban sewage delivery heat transfer system(2):analysis of heat transfer forms and efficiency 【作者中文名】 张承虎; 孙德兴; 吴荣华; 李桂涛; 黄磊; 【作者英文名】 Zhang Chenghu; Sun Dexing; Wu Ronghua; Li Guitao and Huang Lei Harbin Institute of Technology; Harbin; China; 【作者单位】 哈尔滨工业大学; 【文献出处】 暖通空调, Heating Ventilating 输送; 换热效率; 顺流; 逆流; 【英文关键词】 urban sewage; delivery; heat-transfer efficiency; parallel-flow; reverse-flow; 【摘要】 采用效率-传热单元数法,针对顺流和逆流两种形式的污水套管输送换热(TDHT)系统,分析了换热效率,给出了效率计算公式和特点,指出顺流换热效率大于逆流,推荐TDHT系统采用顺流形式。提出了距离负荷比的概念,从技术和经济可行性方面给出了TDHT系统最小的距离负荷比。 【英文摘要】 Using the efficiency-number of heat transfer units method (ε-NTU method), analyses the heat-transfer efficiencies of the parallel-flow and reverse-flow forms of thimble delivery heat-transfer(TDHT) and presents the calculation formulas and related characteristics. The results indicate that the parallel-flow is higher than reverse-flow in heat-transfer efficiency and is recommended to be used for a TDHT system. Presents the definition of distance-load ratio (DLR) and obtains the minimum DLR by the analysis o... 【基金】 北京市“供热、供燃气、通风及空调工程”重点实验室开放课题(编号:KF200503);; 国家自然科学基金资助项目(编号:50578048)