A Comparative Study on Energy Efficiency and Indoor Thermal Comfort of DOAS Applied to Multi-zone Air-conditioning Systems
Conventional air conditioning systems are facing great challenges considering indoor relative humidity control, system safety and effective ventilation in an energy efficient way. The dedicated outdoor air system (DOAS) is widely believed to overcome these problems. A DOAS-integrated system, which combines a DOAS with dry fan-coil units, is presented in this study. Energy efficiency and indoor thermal comfort of this air-conditioning scheme is investigated and compared with two conventional systems, i.e. wet fan-coil units and variable air volume systems, serving the same multi-zone space of an office building in Hong Kong. Control strategies for the DOAS-integrated system are also presented. Tests on two typical operation conditions, i.e. summer day and spring day, are conducted on the simulation platform of TRNSYS. Simulation results show that the DOAS-integrated dry fan-coil unit system can achieve the best indoor relative humidity on two typical days, and it consumes almost the same amount of energy as the wet fan-coil unit system on the summer day and about 5％ more energy on the spring day. In addition, the effect of total heat recovery exchanger on energy saving in hot and humid regions is obvious and demonstrated.
Dedicated outdoor air system Multi-zone air-conditioning Thermal comfort Building energy efficiency
Gaoming Ge Fu Xiao Lizhi Zhang
Department of Building Services Engineering,The Hong Kong Polytechnic University,Kowloon,Hong Kong,C Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry,South China U
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
405-412
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）