| Title |
A Study on an Energy-efficient Outdoor Air Supply Operation Control Method of Apartment Heat Recovery Ventilation System |
| Authors |
Yee Jurng-Jae ; Kim Seok-Keun |
| Keywords |
Heat Recovery Ventilation System ; Energy-efficient ; Outdoor Air Supply ; Operation Control Method |
| Abstract |
Recently, the ventilation system is required by law to satisfy minimum fresh air requirements, but this, in turn, inevitably forces the ventilation system itself to consume extra energy. Thus, there is an increasing need for an adequate control method for supplying outdoor air, which minimizes energy consumption while insuring that indoor air quality is efficiently maintained. Therefore, this study, it will propose a proper outdoor air supply control method in order to minimize energy consumption while effectively preserving IAQ. Results of this study are as follows : (1) It is necessary to avoid operating constant heat-exchange-mode throughout the year, which is common in apartment nowadays, and to switch to bypass-mode, depending on the condition of indoor and outdoor air, for energy conservational outdoor air supply in the ventilation system of apartments. It is also proved that outside air supply control should be determined by the dry bulb temperature instead of enthalpy, in order to be energy-efficient in apartments because apartments are usually not introducing an extra latent heat control method. (2) From the result of energy performance simulations for the heating & cooling loads used to propose a proper operating control method of the heat exchange ventilation system, it was found that using heat-exchange-mode by schedule control method in heating season and using bypass-mode by temperature sensor both in intermediate season and cooling season provided the largest energy savings. (3) The result also showed that adopting this method in weather conditions in Seoul city saved 16.4% of energy compared to the preexistent annual heat-exchange-mode. |