Indirect evaporative cooler for energy recovery in some coastal cities in China
Indirect evaporative cooler(IEC)is a sustainable and high-efficient cooling device which has been widely used in hot and dry regions around the world.Recent studies indicate that the IEC can also be used as a high-efficient energy recovery device in a central air-conditioning(A/C)system in hot and humid regions.An IEC is installed before an air handling unit(AHU)to pre-cool the fresh air by recovering the cooling capacity from the exhaust air from air-conditioned rooms.The fresh air would be cooled and dehumidified by the IEC because of possible condensation.Therefore,the energy consumption of the chiller is reduced as part of the cooling load is removed by IEC.The IEC energy recovery system is particular suitable for 100%fresh air A/C system,in which cool and dry exhaust air can be fully used as secondary air in an IEC.The energy performance of IEC energy recovery system in three developed cities(Hong Kong,Guangzhou and Shanghai)along the coast of China is evaluated.The numerical model of IEC considering three possible operating states(non-condensation,partial condensation and total condensation)condensation is developed The model is then incorporated into Trnsys for year-around simulation.The results show that the IEC energy recovery system can reduce 28.1%to 31.6%energy consumption in a central air-conditioning system with 100%fresh air supply in the above cities.The IEC almost operates under condensation state in hot and humid summer season.Compared with conventional rotating heat recovery wheel,the IEC energy recovery system stands out for its low energy consumption,easy maintenance and cross contamination free.It breaks the regional limitation of IEC application and extends the application to hot and humid regions,with great energy saving and commercialization potential.
indirect evaporative cooler energy recovery energy saving numerical simulation coastal cities
Yi CHEN Hongxing YANG
Faculty of Science and Technology,Technological and Higher Education Institute of Hong Kong,Hong Kon Renewable Energy Research Group(RERG),Department of Building Services Engineering,The Hong Kong Poly
国际会议
武汉
英文
175-182
2018-08-21（万方平台首次上网日期，不代表论文的发表时间）