分布式水泵供热系统的工程应用-建筑与土木工程专业论文.docxVIP

哈尔滨工业大学工程硕士学位论文 哈尔滨工业大学工程硕士学位论文 哈尔滨工业大学工程硕士学位论文 哈尔滨工业大学工程硕士学位论文 - - PAGE IV - - - III - Abstract With the development of district heating systems, the energy consumption of heat network gets more and more attention by people. Although the size of district heating systems has increased in recent years, the management level of heating company has been improved, the energy waste phenomenon is still serious. The main reason is that the price system of coal and electricity is irrational which make the enterprises in the ―energy saved but money is not festival‖ position. The initiative of the heating company taking measures to saving energy is combated. Meanwhile the traditional way of calculating and analyzing heating energy is not strict in theory. Assessment of economic effect by energy saving will cause controversy. In this paper, with the distributed pump program of a certain district heating heating system in Harbin for engineering example, the relationship between energy saving ratio of district heating system and the location of zero pressure point was discussed, and the economic of the system was calculated in order to direct actual designment and application. Firstly, the transportation energy consumption of traditional district heating system was compared with two different types of distributed pump heating system, and then the energy saving ratio calculation method was obtained. Secondly, 37 programs were proposed according to the pressure difference between heat source and zero pressure point. The variation curve of energy saving rate and the numbers of pump stations with pressure head of circulation pump was studied. The feasibility of 37 programs was qualitatively analyzed with the curve, and the option area of program was decided. Finanlly, the economy calculation model of distributed pump heating system was established, the system initial cost, operation cost was analysed, and then system annual conversion cost was obtained. The economy of the program w