Residential Area To Focus On Technical And Economic Analysis Of The Cooling System

District heating and cooling (DHC) system is a part of energy system in a modern city. Many techniques concerning energy conservation can be applied to DHC system, and initial cost and maintenance cost can also be reduced. DHC system has the advantages of higher energy efficiency, eliminating air pollution, saving space of building and beautifying appearance of city. District cooling (DC) is very suitable for high-density residential district in south China. Due to large scale and cost of DC system in residential district, the thesis proposed the problem of technical and economical analysis for DC system in residential district. This paper tried to quest the DC system energy saving, economical and beneficial to environment for residential district in south China, Liuxiancun, a large residential district located in Shenzhen, was taken as example.From this paper, a new optimized method and its program for scheming the capacity and numbers of chillers in central chilled water plant were presented. A new idea of applying cooling water to fountain and waterfall in residential district was brought forward, and the feasibility of such idea was studied. Characteristics and energy consumption of different distribution systems during operation were analyzed and compared, and proper method for calculating energy consumption of variable water volume system was pointed out. A new method applying LCC analysis to optimize AT of chilled water system was presented, and relative mathematic model was established. At the end, the program about technical and economical analysis using LCC analysis for central air conditioning project was presented. Such program was used for technical and economical analysis of DC system in Liuxiancun.The results show that DC system in residential district has the advantages of improving energy efficiency, eliminating air pollution and beautifying appearance of residential district. Through the study, it is believed that the application of DC system in residential district is feasible from the viewpoints of technique and economy. If the supply of natural gas is ensured, it is wise that natural gas, nearly not harmful to environment, is adopted, even if sometimes government should give some priority and support.