Abstract
Return vent height of stratified air distribution (STRAD) systems has been intensively investigated and been widely recommended to be the middle level. It is also reported that combining the exhaust with heat sources can reduce cooling load. However, optimization of return vent height of the room combing exhaust with heat sources has been rarely reported. This study optimizes the return vent height of a room with exhaust/lamps-combined layout and cooled by an impinging jet ventilation system (one type of STRAD systems). Evaluation indices cover energy consumption, indoor air quality, and thermal comfort (i.e., cooling coil load, mean age of air, CO2 mass fraction, the temperature difference between head and ankles, predicted percentage of dissatisfied, and draft rate). The exhaust/lamps-combined layout leads to an optimal return vent height of 1.5 m, which is close to the optimal height for exhaust/lamps-split layouts, indicating the exhaust/lamps relative distance is ignorable when optimizing return vent heights.
| Original language | English |
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| Title of host publication | Proceedings of the 12nd International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2021), Seoul, Korea, 24-26 November 2021 |
| Number of pages | 5 |
| Publication status | Published - 24 Nov 2021 |
| Event | 12nd International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2021) - Seoul, Korea, Democratic People's Republic of Duration: 24 Nov 2021 → 26 Nov 2021 |
Conference
| Conference | 12nd International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2021) |
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| Country/Territory | Korea, Democratic People's Republic of |
| City | Seoul |
| Period | 24/11/21 → 26/11/21 |
Bibliographical note
Information for this record is supplemented by the author(s) concerned.Research Keywords
- impinging jet ventilation
- return vent height
- cooling coil load
- indoor air quality
- exhaust/lamps-combined layout