The Analysis Of Hydraulic Condition Of Ring-shaped Heating Network And The Optimization Of Operation Scheme In Handan

The system of ring-shaped heating network with multi-heat sources has its special advantage in saving energy, environment protection, reliable operation, flexible development, economical cost, etc. It will be a development trend in the area of district heating in future. In this paper, research the system of ring-shaped heating network with multi-heat sources in the mail urban area of Han Dan, including mainly:1. Analyze and calculate various different hydraulic conditions of ring-shaped heating network, such as design condition and emergency condition, adjust partial unsuitable pipes, offer some technological parameters for adjusting and selecting hot water circulating pumps and relay pumps, at last select and check water pumps.2. Based on the principle of flow balance and heat balance, analyze two operation schemes: 1) According to the designed scheme, the both of northern power plant and southern power plant are operated at the same time by truncating the heating network with valves in the two ends of Heping Road (the two main heating sources is operated in respective heating area in the whole heating period). 2) By the principle of optimization, operate firstly the northern heating source closing to the heating network; when reaching its heating capacity, start parallely the southern power plant; by this, postpone operating the relay pumps. Finally, compare and analyze the energy efficiency of transportation and operation reliability for two operation schemes, determine the optimal operation scheme of the system of ring-shaped heating network in forward future (in 2010).To analyze the hydraulic condition of the ring-shaped heating network and gain the optimal operation scheme, inquire firstly the calculation method of hydraulic condition of ring-shaped network in this paper, combine with the accessibility analysis method in transmission and distribution system, summarize the calculation process of ring-shaped network with multi-heat sources in design condition; propose the basis of setting relay pump for the transportation system in long-desistance network, including its position and head of relay pump. At last, summarize the optimization principle of operation schemes for ring-shaped network with multi-heat sources, and perfect the designed operation by these principles.By these research and analysis in this paper, not only find partial improper pipes and adjust them, but also by comporision and analysis offer some technological parameters for the department who is responsible for heat-supply system when formulating the optimal operation.