The impact of temperature on mean local air age and thermal comfort in a stratum ventilated office |
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| Authors: | Lin Tian Zhang Lin Jing Liu Ting Yao Qiuwang Wang |
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| Affiliation: | 1. Building Energy & Environmental Technology Research Unit, School of Energy and Environment and Division of Building Science and Technology, City University of Hong Kong, Hong Kong SAR, China;2. State Key Lab of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049, China |
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| Abstract: | The influence of the supply air temperature on the mean local air age and thermal comfort of a typical individual office under stratum ventilation is investigated by a numerical method, which is validated by an experiment carried out by the authors. The results show that for an office, when the supply air temperature is increased from 19 °C to 21 °C, the corresponding mean occupied zone temperature rises from 24.5 °C to 26.5 °C. The inhaled air quality for the occupant is improved when supply air temperature rises from 19 °C to 21 °C. Also, the thermal comfort indices (predicted mean vote or PMV, predicted percentage of dissatisfied or PPD and predicted dissatisfied or PD) fulfill the requirements of ISO 7730 and CR 175 1998. For summer cooling operation, stratum ventilation may offer a feasible solution to elevated indoor temperatures, which are recommended by several governments in East Asia. |
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| Keywords: | Stratum ventilation Mean local air age Thermal comfort Elevated indoor temperatures |
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