Abstract:

In this paper , the Second Law Analysis of Thennodynamics is advanced for the energy supply modes of building HV AC and hot water system , which occupies 80% of building energy consumption. The theoretical basis to increase exergy efficiency from the traditional 10% to 65% is then pointed out. The corresponding technical approaches， based on the energy-conservative design of building envelop , should integrate the creation of low exergy-
loss air-conditioning tenninal technology with large-scope district cooling system (DCS) and distributed combined cooling , heating and power system (DES/CCHP) , fonning the new generation of Town Building Energy Purvey System. In order implement the creation of Town Building Energy Purvey System in China ，the paper pointed out the challenge and opportunity , and the importance of taking the experiences of developed countries and overcome the main barriers in idea and mechanism. Finally , the implementation practice steps for newly constructed towns and existing towns are suggested respectively; the significant role of municipal administration on planning , policy , organization and coordination are emphasized.

Key words: town energy system, thennodynamic analysis, combined cooling, heating and power, integrated creatlon