Journal
ENERGY AND BUILDINGS
Volume 108, Issue -, Pages 420-432Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2015.09.032
Keywords
Natural ventilation; Thermal comfort; Daylight; Energy saving; Green building
Funding
- Hong Kong PhD Fellowship Scheme
- Hong Kong Polytechnic University Research Institute for Sustainable Urban Development (RISUD) [K-ZJHE]
- Housing Authority of the Hong Kong SAR Government
- Ove Arup & Partners Hong Kong Limited
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This paper presents a combined daylight, airflow network and building energy simulation of a Public Rental Housing (PRH) development in Hong Kong to fulfil the requirement of the local green building guidance. The numerical modelling results are partly validated by on-site measurements during the period with the highest monthly average outdoor temperature. Different ventilation control strategies are simulated to optimize natural ventilation performance. The simulation results show that the full-day ventilation strategy contributes to a lower average and peak indoor temperatures compared to the non-ventilation and night-ventilation scenarios. The indoor operative temperature of a worst-case vacant flat lies under the upper 80% acceptability limits in ASHRAE 55 during 67.5% of the modelled period in July. On the other side, at least 95.6% of the habitable area in the case buildings is predicted to experience a higher average daylight factor of 1% compared with the local green building guidance. Furthermore, the energy saving potential of the combined natural ventilation and daylight strategies is anticipated to be 51.9% for air-conditioning and 8.3% for lighting compared to a baseline building, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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