Computational fluid dynamics (CFD) modelling of air flow field, mean age of air and CO2 distributions inside a bedroom with different heights of conditioned air supply outlet

Mao Ning, Song Mengjie, Chan Mingyin, Pan Dongmei*, Deng Shiming

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Citations (Scopus)

Abstract

It was revealed in a previous related study that for an air conditioning (A/C) system used in a sleeping environment, the height of its supply air outlet would significantly affect its ventilation performance in terms of effectiveness. To further examine the underlying reasons of the differences in ventilation performance, the air flow field, distributions of mean age of air, air change efficiency and distributions of CO2 concentrations inside an experimental bedroom were numerically studied using CFD method under five different settings, where its supply air outlet was positioned at 5 different heights. The study results suggested that positing a supply air outlet at a lower level was effective in both saving energy and removing the exhaled CO2 in a breathing zone, and when a supply outlet was positioned at a higher level, less CO2 was removed from the region near the mouth of a sleeper.

Original languageEnglish
Pages (from-to)906-915
Number of pages10
JournalApplied Energy
Volume164
DOIs
Publication statusPublished - 15 Feb 2016
Externally publishedYes

Keywords

  • Air change efficiency
  • CFD method
  • CO concentration
  • Height of supply air outlet
  • Mean age of air
  • Sleeping environments

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