Journal of Applied Mathematics
Volume 2012 (2012), Article ID 287271, 12 pages
Research Article

Airflow and Heat Transfer in the Slot-Vented Room with Radiant Floor Heating Unit

1School of Civil Engineering, Hunan University, Hunan, Changsha 410082, China
2Department of Building Engineering, Hunan Institute of Engineering, Hunan, Xiangtan 411104, China
3Soochow University, Jiangsu, Suzhou 215137, China
4Institute of Built Environment and Control, Zhongkai University of Agriculture and Engineering, Guangdong, Guangzhou 510225, China

Received 13 January 2012; Accepted 20 February 2012

Academic Editor: M. F. El-Amin

Copyright © 2012 Xiang-Long Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Radiant floor heating has received increasing attention due to its diverse advantages, especially the energy saving as compared to the conventional dwelling heating system. This paper presents a numerical investigation of airflow and heat transfer in the slot-vented room with the radiant floor heating unit. Combination of fluid convection and thermal radiation has been implemented through the thermal boundary conditions. Spatial distributions of indoor air temperature and velocity, as well as the heat transfer rates along the radiant floor and the outer wall, have been presented and analyzed covering the domains from complete natural convection to forced convection dominated flows. The numerical results demonstrate that the levels of average temperature in the room with lateral slot-ventilation are higher than those without slot-ventilation, but lower than those in the room with ceiling slot-ventilation. Overall, the slot-ventilation room with radiant floor heating unit could offer better indoor air quality through increasing the indoor air temperature and fresh air exchanging rate simultaneously. Concerning the airborne pollutant transports and moisture condensations, the performance of radiant floor heating unit will be further optimized in our future researches.