| Title |
Required Supply Air Conditions and Energy Saving Potentials of Dedicated Outdoor Air System with Parallel Cooling and Heating in a High-rise Apartment Building |
| Authors |
Jeong Jae-Weon ; Kim Min-Hwi ; Kim Yu-Sin ; Kim Jin-Hyo ; Kwon Oh-Hyun |
| Keywords |
DOAS ; High-rise Apartment House ; Decentralized Ventilation ; Centralized Ventilation |
| Abstract |
The main thrust of this paper is to investigate optimized supply air conditions and energy saving potentials of a dedicated outdoor air system (DOAS) applied to a highrise apartment building. As for a typical 132-m2 apartment unit, it was assumed that two different systems; centralized DOAS-Ceiling Radiant Cooling Panel and decentralized Energy Recovery Ventilator-Packaged Air Conditioner were installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program, and annual cooling coil load and heating load reduction potentials were compared. It was found in this research that DOAS-Ceiling Radiant Cooling Panel system can reduce the cooling coil load over 21% annually compared with the current Energy Recovery Ventilator-Packaged Air Conditioner pair. In addition, over 40% of annual ventilation heating load can be reduced by use of DOAS when the enthalpy wheel and the sensible wheel of the DOAS unit operate simultaneously. It was also found that the optimized dew point temperature of the DOAS supply air accommodating total latent load of a space is 11-12°C. |