| 요약2 |
One of the hybrid(load-sharing) HVAC systems, that attracted attention with its potential for energy savings while providing high thermal comfort, is a radiant cooling system using ceiling panels. The panel system may be combined either with a central forced-air system or with decentralized convective systems, or with in-space fan-coil units. In this study, in order to verify heat transfer characteristics of ceiling panels, numerical and parametric studies were performed for various design and operating variables, such as tube spacing, tube diameter, thermal resistance of fin, inlet water temperature and mass flow rate, etc. As results, in order to improve the cooling capacity in terms of panel design, the ceiling panel must narrow as possible the tube spacing and should be minimized the thermal resistance between the tube and the fin. Also, the temperature and flow rate of cold water supplied to the ceiling panel had a great influence on the cooling capacity of the radiant panel. |