TECHNO-ECONOMIC ASSESSMENT AND OPTIMIZATION OF DISTRICT COOLING SYSTEM IN A MEGA-CITY
Buildings in mega-cities in hot and humid climate regions consume huge amount of energy for air conditioning. The energy use and the associated environmental burdens can be largely reduced if discrete plants in individual building are replaced by district cooling systems (DCSs). Besides lower initial and operating costs due to use of more efficient plants, using a DCS to serve a wide mix of building types can take advantage of the diversity among the buildings cooling demands, which will further reduce initial and operating costs. The cooling demand and energy use of six district models, with peak cooling demands in the range of 10MW to 200MW, were predicted for cases where individual buildings in those districts used independent air- cooled or water-cooled systems and where a direct seawater-cooled DCS was used, based on the year-round weather conditions of Hong Kong. The results show that using a DCS could yield a reduction in air- conditioning energy use in the range of 9-25％. The economic appraisal unveiled that DCS of a capacity of 20MW or greater will be economically viable while best economic performance can be achieved for plants greater than 100MW.
ANTHONY C W LO FRANCIS W H YIK PHIL JONES
Welsh School of Architecture, Cardiff University, United Kingdom Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong
国际会议
广州
英文
406-414
2006-12-01（万方平台首次上网日期，不代表论文的发表时间）