Accessibility navigation

Evaluation of heating performances of different ventilation methods in an office

Li, T., Essah, E. A. ORCID:, Wu, Y., Liao, C. and Cheng, Y. (2023) Evaluation of heating performances of different ventilation methods in an office. Indoor and Built Environment. ISSN 1420-326X

Text - Accepted Version
· Please see our End User Agreement before downloading.


It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1177/1420326X231200561


In this study, twelve cases were investigated in an office-layout room using experiments and computational fluid dynamics (CFD) simulations. The heating performances of four ventilation methods (i.e., Mixing Ventilation (MV), Stratum Ventilation (SV), Deflection Ventilation (DeV) and Impinging Jet Ventilation (IJV)) were comprehensively compared by various evaluation indexes (i.e., predicted mean vote (PMV), draught rate (DR), vertical air temperature difference (△T), air diffusion performance index (ADPI), energy utilization coefficient (EUC), air change efficiency (ACE) and contaminant removal efficiency (CRE)). Better thermal comfort was found in rooms heated by SV and DeV. The PMV, DR and △T under SV and DeV complied with Category B of ISO 7730:2005, and the ADPI was in full compliance with the stipulation of ANSI/ASHRAE 113-2022. For the energy-saving characteristic, the targeted-occupied-zone ventilation methods (i.e., SV, DeV and IJV) can effectively deliver warm air to the occupied zone, with the EUC values higher than unity and thus providing a good potential for energy saving. SV and IJV showed slightly higher ACEs at the breathing zone. The contaminant removal effectiveness of SV, DeV and IJV was comparable. Under the combined influence of occupant thermal plumes and locations of exhausts, MV showed a high CRE. However, the CRE under MV decreased significantly when the exhausts were not above occupants. In the case of supply air parameters in this study, the entropy weight method indicated that DeV and SV had a better overall performance for winter heating, followed by IJV and then MV.

Item Type:Article
Divisions:Science > School of the Built Environment > Construction Management and Engineering
Science > School of the Built Environment > Energy and Environmental Engineering group
ID Code:113475


Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation