| Title |
A Study on Indoor Environmental Control System Coupled with Hybrid-ventilation and Radiant Floor Heating/Cooling System |
| Authors |
Seo Jung-Min ; Lee Joong-Hoon ; Song Doo-Sam |
| Keywords |
Hybrid Ventilation ; Cooling ; Heating ; Experiment ; Simulation |
| Abstract |
Lately, a concern about IAQ is increasing and the demand for indoor thermal comfort is growing. These result in higher energy consumption for indoor environmental control. The hybrid ventilation system using nature power as it possible seems to reduce the energy use for ventilation and cooling. For this reason, the hybrid ventilation is widely applied in Europe and Japan. In this study, a concept of the hybrid ventilation system coupled with radiant floor heating and cooling is proposed. In this Paper, the details of hybrid ventilation system are described and the performance of the proposed systems is evaluated through physical experiment and simulation in terms of the indoor environmental control behaviors and energy saving efficiency. To analyze the possibility of indoor climate control using the hybrid ventilation system, the experiment was accomplished under intermediate season. As results, the indoor thermal environment was controlled with comfort as introducing the outdoor air when the outdoor condition was good, and the energy demand for cooling and ventilation is decreased. Based on the experimental results, the performance of the proposed system was analyzed by TRNSYS simulation in intermediate season and summer. The indoor thermal environment is controlled by radiant floor cooling mainly and the hybrid ventilation system take on a role for ventilation, night-time cooling and dehumidification under summer season. From the simulation result, energy performance of the proposed system is better than a traditional air-conditioning system. However, when outdoor humidity is high, the dehumidification load for ventilation is increased. This result suggests that the outdoor air should be introduced based on the enthalpy instead of temperature. |