| Title |
Thermal Comfort of the Floor Supply Air Conditioning System for Different Supply-return Locations during Cooling |
| Keywords |
Floor supply air conditioning system ; 바닥급기 공조시스템 ; Thermal comfort ; 온열 쾌적도 ; Predicted mean vote ; 예상온열감 ; Cooling ; 냉방 |
| Abstract |
This study numerically investigates thermal comfort in a space cooled by the floor-supply air conditioning system, in which three different supply-return locations, one floor supply-ceiling return and two floor supply-floor returns, are treated. A complementary experiment is performed to validate the present numerical analysis, and the prediction agrees favorably with the measured data. In the numerical procedure, a simplified model mimicking the inlet flow through the diffuser is developed for efficient simulations. The calculated results show that the ceiling return type is far better in thermal comfort than the floor return ones within the extent of this study, which seems to be caused by effective vertical penetration of the supply air against natural convection. It is also revealed that the arrangement of port locations in the floor supply-floor return system has insignificant effect on the cooling performance. For selecting a proper system, other characteristics including the heating performance should be accounted for simultaneously with the present estimation. |