Abstract
The stack effect occurs always when there exits temperature difference between
indoor and outdoor air and climate wind pressure even increases its strength. This stack effect acts like a chimney: natural convection of air entering at the lower floors, flowing through the building and exiting from the upper floors. The vertical movement of the air within the building will occur in the shafts and staircases as well as any other openings that exist at the slab edge or in vertical piping sleeves at various locations that are not perfectly sealed. Uncontrolled air movement over the building envelope and further through the building increases draft risk and energy consumption. Over the neutral pressure level point, exfiltration happens and outflowing air could be condensate inside building envelope and increase the risk of mold grow. Also, high uncontrolled air movement could increase noise and the risk of spread of pollutions between apartments. In this study, the effects of external and internal air tightness, air temperature control of shaft and outdoor environmental conditions on air pressure conditions were simulated in a high rise apartment building with a multi-zone simulation model. Based on the carried out analysis together with air tightness of envelope, internal air tightness of shafts is playing a significant role in the stack effect. Thus staircases and lifts should be provided with
own airtight anteroom and airtightness of apartment doors should be improved.
indoor and outdoor air and climate wind pressure even increases its strength. This stack effect acts like a chimney: natural convection of air entering at the lower floors, flowing through the building and exiting from the upper floors. The vertical movement of the air within the building will occur in the shafts and staircases as well as any other openings that exist at the slab edge or in vertical piping sleeves at various locations that are not perfectly sealed. Uncontrolled air movement over the building envelope and further through the building increases draft risk and energy consumption. Over the neutral pressure level point, exfiltration happens and outflowing air could be condensate inside building envelope and increase the risk of mold grow. Also, high uncontrolled air movement could increase noise and the risk of spread of pollutions between apartments. In this study, the effects of external and internal air tightness, air temperature control of shaft and outdoor environmental conditions on air pressure conditions were simulated in a high rise apartment building with a multi-zone simulation model. Based on the carried out analysis together with air tightness of envelope, internal air tightness of shafts is playing a significant role in the stack effect. Thus staircases and lifts should be provided with
own airtight anteroom and airtightness of apartment doors should be improved.
| Original language | English |
|---|---|
| Title of host publication | CLIMA 2016 - proceedings of the 12th REHVA World Congress |
| Publisher | Aalborg University, Department of Civil Engineering |
| Number of pages | 10 |
| ISBN (Print) | 87-91606-30-6 |
| Publication status | Published - 2016 |
| MoE publication type | A4 Article in a conference publication |
| Event | International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings - Aalborg, Denmark Duration: 22 May 2016 → 25 May 2016 |
Conference
| Conference | International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings |
|---|---|
| Abbreviated title | IAQVEC |
| Country/Territory | Denmark |
| City | Aalborg |
| Period | 22/05/2016 → 25/05/2016 |
