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An Experimental Study of Indoor Air Distribution Characteristics in a Room with Mixing Ventilation and Chilled Ceiling

  • Dalian University
  • Dalian University of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

A mixing ventilation (MV) system integrated with a chilled ceiling (CC) cooling system will be a potential advanced heating, ventilation and air conditioning (HVAC) system in the modern office buildings. In this paper, an experimental study of the air distribution characteristics in a room with MV and CC was performed when considering the effect of the heat transfer of external envelope. The distributions of indoor air temperature and velocity were measured and evaluated by the vertical air temperature difference and turbulence intensity, respectively. The results showed that when chilled ceiling surface temperature ranged from 17.0 to 26.0 °C and supply air temperature was 16.0–22.0 °C, the increased trend of vertical air temperature was gradually switched to the decreased trend along the vertical direction, and the vertical air temperature differences in occupied zone were all not exceeded 0.4 °C. The average turbulence intensity was 30–41% when the internal and external sensible cooling loads equal 41.5 W/m2. The range of these evaluation indices varied clearly when the internal sensible cooling load increased from 41.5 to 69.5 W/m2, whereas they were almost the same when the external sensible cooling load increased from 41.5 to 69.5 W/m2.

Original languageEnglish
Title of host publicationProceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2019 - Volume 1
Subtitle of host publicationIndoor and Outdoor Environment
EditorsZhaojun Wang, Fang Wang, Peng Wang, Chao Shen, Jing Liu, Yingxin Zhu
PublisherSpringer
Pages211-220
Number of pages10
ISBN (Print)9789811395192
DOIs
StatePublished - 2020
Event11th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2019 - Harbin, China
Duration: 12 Jul 201915 Jul 2019

Publication series

NameEnvironmental Science and Engineering
ISSN (Print)1863-5520
ISSN (Electronic)1863-5539

Conference

Conference11th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2019
Country/TerritoryChina
CityHarbin
Period12/07/1915/07/19

Keywords

  • Chilled ceiling
  • Mixing ventilation
  • Temperature distribution
  • Velocity distribution

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