Study On Evaluation Of Residential Air Conditioning Technology In Yangtze Valley

The Yangtze River area is located in hot summer and cold winter thermal zone, which has persistent high temperature in summer, gloom and cold weather in winter, and damp environment in transition season, the all year climate is formidable, so there needs the coexistence of heating, cooling, dehumidification and ventilation in indoor environment. Recent years, with the fast increase of economic level, the construction of residential building in this area has a vigorous development, which has been accompanied with the multiple application of residential air-conditioning technology. Due to lack of scientific evaluation and guidance, the energy consumption of air-conditioning system in this area is astonishing, but both the energy resource situation and development view are not supporting for this mode which coarsely improve the heat and moisture environment in residential buildings. Based on this background, the paper develops a more comprehensive and systematic evaluation studies on residential air-conditioning technology in Yangtze River area, initially establishes a more complete comprehensive evaluation system of residential air-conditioning and lay a solid foundation for research on active energy consumption of residential building. This paper is one of the researches of the project"study on theory and strategy of residential building energy consumption in Yangtze River area"(2006BAJ01A05-1), which is the sub-project of the major project supported by national scientific and technological in the"eleventh five-year"plan.The complete system of comprehensive evaluation about residential air- conditioning consists of three sections, one is index system which is comprised of inherence linked indexes; the other one is the evaluation method which can correctly reflect the evaluation target; the last one is the evaluation system which definitely reflect the composition of corresponding weight.The premise of constitution of evaluation index system is to determine guidance, namely the evaluation principle. So, three principles of evaluation of residential building, climate compatibility, social compatibility and environmental compatibility, are proposed firstly in this paper on the basis of analysis on the conditions and problems of the existing evaluation principles and the necessity of new principles; the meaning, definition, role and status of three principles are also represented in the paper. The climate compatibility of several kinds of cold and heat source technologies of residential air-conditioning in Yangtze River area is evaluated. The climate compatibility means the reliability of the same air-conditioning technology applied in different climatic conditions and different air-conditioning technologies applied in same climatic condition. Guided by the principle and theory of climate compatibility, the climate impact factor, climate evaluation index and index quantification method of air source heat pump, ground source heat pump, gas heat pump and direct fired absorption chiller are studied, and different evaluation methods of regional evaluation and technical evaluation of climate compatibility are determined; the evaluation results of climate compatibility of 9 representative cities and four kinds of cold and heat source technologies are obtained.The social compatibility of several kinds of air-conditioning technologies of residential building in Yangtze River area is evaluated. Social compatibility refers to the satisfaction level of the residential air-conditioning technology to its relative social factors. Guided by the principle and theory of social compatibility, the evaluation index system of social compatibility of residential air-conditioning technology has been established; in nine representative cities in Yangtze River area, the social compatibility of five residential air-conditioning technologies, which include room air conditioner, multi-connected heap pump, unitary air conditioner gas heat pump and direct fired absorption chiller, are evaluated based on fuzzy comprehensive evaluation method and the evaluation result of social compatibility of five different air-conditioning technologies are obtained.The environmental compatibility of several kinds of air-conditioning technologies of residential building in Yangtze River area is evaluated. Environmental compatibility refers to the evaluation on its environmental impact based on the life cycle of air-conditioning technology. The detailed list model of environmental compatibility is established by using life-cycle evaluation method which consider the production and transmission of primary energy source and the eventually abandoned air-conditioning system as the system boundary, and consider 1kW output cooling capacity as the functional unit; the energy depletion potential, global warming potential, atmospheric pollutant emissions and its thermal pollution emissions of five residential air-conditioning technologies, which include room air conditioner, multi-connected heap pump, unitary air conditioner gas heat pump and direct fired absorption chiller, are calculated; the environmental compatibility of five different air-conditioning technologies of residential building in Yangtze River area is evaluated comprehensively and the relative order of the technologies from best to worst is: direct fired absorption chiller > room air conditioner > gas heat pump > multi-connected heap pump> unitary air conditioner.Base on the evaluation of climate compatibility, social compatibility and environmental compatibility, the gradual-hierarchy-tree-like index system of residential air-conditioning technology is constructed, which has scientific structure, comprehensive index and operable application; the application characteristics and requirements of government, technology provider and user are analyzed, base on that analysis, the variable weight system of evaluation index system is proposed; in nine representative cities in Yangtze River area, based on the procedure of comprehensive evaluation of residential air-conditioning technology, the application of five different air-conditioning technologies, which include room air conditioner, multi-connected heap pump, unitary air conditioner gas heat pump and direct fired absorption chiller, is evaluated comprehensively, and the appropriate air-conditioning technologies for different cities in Yangtze River area is obtained, finally, according to applications in different main bodies, the development proposal of residential air-conditioning technology for cities in Yangtze River area is represented in this paper.