Title :
Heat Transfer Forms and Efficiency Analysis of Urban Sewage Delivery Heat Transfer System
Author :
Chenghu, Zhang ; Haiyan, Wang ; Dexing, Sun
Author_Institution :
Harbin Inst. of Technol., Harbin, China
Abstract :
The thimble delivery heat-transfer (TDHT) system is one of the primary modes to utilize the energy of urban sewage. Used the efficiency-number of transfer units method (ε-NTU), the heat-transfer efficiencies of the parallel-flow and reverse-flow TDTH forms are analyzed and the calculation formulas and characteristic are also given. The results indicated that the efficiency of parallel-flow is larger than it of reverse-flow, so the TDTH system must choose the parallel-flow form. The definition of distance-load ratio (DLR) has been defined and the minimum DLR has been obtained by the technical and economic feasibility analysis. The thesis will provide reference for heat-transfer calculation and schemes determination of urban sewage cool or heat source applied delivery heat transfer method.
Keywords :
heat transfer; sewage treatment; Thimble delivery heat transfer system; distance-load ratio; economic feasibility analysis; efficiency number; heat source; heat transfer calculation; heat transfer efficiency analysis; heat transfer form; parallel flow form; urban sewage cool; urban sewage delivery heat transfer system; Economics; Heat pumps; Heat transfer; Sun; Waste heat; Water heating; delivery heat transfer; efficiency; parallel-flow; reverse-flow; urban sewage;
Conference_Titel :
Measuring Technology and Mechatronics Automation (ICMTMA), 2011 Third International Conference on
Conference_Location :
Shangshai
Print_ISBN :
978-1-4244-9010-3
DOI :
10.1109/ICMTMA.2011.365
