Abstract
The present study investigated different combinations of floor/ceiling heating with mixing/displacement ventilation and their impacts on the indoor air distribution and ventilation effectiveness. Measurements were performed in a room during heating season in December. The results show that indoor vertical air temperature differences and air velocities for different hybrid systems are less than 3 C and 0.2 m/s when supply air temperature is 19 C, air change rate is 4.2 h-1, and heated surface temperature of floor/ceiling heating system is 25 C. Ventilation effectiveness of mixing ventilation system combined with floor/ceiling heating systems is approximately equal to 1.0, and ventilation effectiveness of displacement ventilation system combined with floor/ceiling heating systems ranges from 1.0 to 1.2. The floor/ceiling heating systems combined with mixing ventilation system have more uniform indoor air distribution but smaller ventilation effectiveness compared with the floor/ceiling heating systems combined with displacement ventilation system. With regard to the building heat loss increased by non-uniform indoor air distribution and small ventilation effectiveness, there should be an optimal combination of floor/ceiling heating with mixing/displacement ventilation to have the minimal building heat loss.The present study investigated different combinations of floor/ceiling heating with mixing/displacement ventilation and their impacts on the indoor air distribution and ventilation effectiveness. Measurements were performed in a room during heating season in December. The results show that indoor vertical air temperature differences and air velocities for different hybrid systems are less than 3 C and 0.2 m/s when supply air temperature is 19 C, air change rate is 4.2 h-1, and heated surface temperature of floor/ceiling heating system is 25 C. Ventilation effectiveness of mixing ventilation system combined with floor/ceiling heating systems is approximately equal to 1.0, and ventilation effectiveness of displacement ventilation system combined with floor/ceiling heating systems ranges from 1.0 to 1.2. The floor/ceiling heating systems combined with mixing ventilation system have more uniform indoor air distribution but smaller ventilation effectiveness compared with the floor/ceiling heating systems combined with displacement
ventilation system. With regard to the building heat loss increased by non-uniform indoor air distribution and small ventilation effectiveness, there should be an optimal combination of floor/ceiling heating with mixing/displacement ventilation to have the minimal building heat loss.
| Original language | English |
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| Title of host publication | Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning |
| Publisher | Springer |
| Publication date | 2014 |
| Pages | 59-67 |
| Chapter | 7 |
| ISBN (Print) | 978-3-642-39583-3 |
| ISBN (Electronic) | 978-3-642-39584-0 |
| DOIs | |
| Publication status | Published - 2014 |
| Event | 8th International Symposium on Heating, Ventilation and Air Conditioning - Xi' An, China Duration: 19 Oct 2013 → 21 Oct 2013 Conference number: 8 http://www.ishvac2013.org/v2/index.php |
Conference
| Conference | 8th International Symposium on Heating, Ventilation and Air Conditioning |
|---|---|
| Number | 8 |
| Country/Territory | China |
| City | Xi' An |
| Period | 19/10/2013 → 21/10/2013 |
| Internet address |
| Series | Lecture Notes in Electrical Engineering |
|---|---|
| Volume | 261 |
| ISSN | 1876-1100 |