| Issue |
E3S Web Conf.
Volume 111, 2019
CLIMA 2019 Congress
|
|
|---|---|---|
| Article Number | 03074 | |
| Number of page(s) | 8 | |
| Section | High Energy Performance and Sustainable Buildings | |
| DOI | https://doi.org/10.1051/e3sconf/201911103074 | |
| Published online | 13 August 2019 | |
Influence of Building Air Tightness on Energy Consumption of Ventilation System in Nearly Zero Energy Residential Buildings
1 College of Urban Construction, Nanjing Tech University, Nanjing, 210009, Jiangsu, China
2 China Academy of Building Research, Beijing 100020, China
* Corresponding author: yuzhen@chinaibee.com
Building air tightness increased quickly in recent years as nearly zero energy buildings concept gradually drawn more attentions from the industry. Ventilation system plays an important role for the indoor air quality control in residential buildings with good air tightness. The energy consumption of the ventilation system is a significant part of the overall energy consumption of low energy residential building. The influence of the building air tightness on the energy consumption of ventilation system was not addressed sufficiently in previous studies. This paper analyses the quantitative relations between building air tightness, energy recovery efficiency and ventilation system control strategy. A mathematical model of the heating and cooling energy consumption in residential buildings is proposed, which takes building air tightness, energy recovery efficiency and control strategy of ventilation system as major input parameters. Equivalent COP of ventilation energy recovery system is proposed as an energy efficiency index of the ventilation system. It can be used as a criterion to decide the optimal design parameters of nearly zero residential buildings in different climate conditions.
© The Authors, published by EDP Sciences, 2019
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