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Numerical investigation of height impact of local exhaust combined with an office work station on energy saving and indoor environment

journal contribution
posted on 2017-07-05, 15:33 authored by Ahmed Qasim Ahmed, Shian Gao
A healthy and comfortable working environment is very important for improving its occupants' productivity. In this study, the evaluation of the height impact for the proposed local exhaust ventilation system on the indoor thermal comfort, inhaled air quality and energy savings was explored numerically. In the proposed system, the exhaust opening was combined with the office workstation in a single unit. The intention was to help extract the warmed and contaminated air locally before it disperses across the room. The performance of the new system at three different heights of the combined system (1.4 m, 1.6 m and 2.0 m) above floor level was investigated numerically with a validated CFD model in a room with and without inclusion of the novel local exhaust ventilation system. The performance of using this system was evaluated using the main evaluation indices for any ventilation system such as energy saving, occupant thermal comfort, draught risk and the quality of the indoor air. The results showed that by selecting a suitable height for the combined system, a significant improvement on energy savings (up to 22.56%) and inhaled air quality can be realised with an acceptable level of the indoor thermal comfort. It was found that in comparison to cases 2 (1.4 m) and 4 (2.0 m), case 3 (1.6 m) was considered to be the best height at which optimal performance could be achieved from the LEVO system.

Funding

The authors would like to thank the Ministry of Higher Education and Scientific Research of Iraq for the financial support of the project.

History

Citation

Building and Environment, 2017, 122, pp. 194-205

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

  • AM (Accepted Manuscript)

Published in

Building and Environment

Publisher

Elsevier

issn

0360-1323

eissn

1873-684X

Acceptance date

2017-06-05

Copyright date

2017

Available date

2018-06-08

Publisher version

http://www.sciencedirect.com/science/article/pii/S0360132317302457

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en

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