Performance of a dry cooling and dedicated ventilation system under different operating conditions

Hua Chen, Wai Ling Lee, Ai Xia Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Effectiveness of dry cooling and dedicated ventilation (DCDV) system for decoupling dehumidification from cooling to achieve the desired indoor condition and condensate-free objectives for air-conditioning of office environments in Hong Kong has been confirmed in previous simulation and experimental studies by the authors. However, our previous studies assumed a constant outdoor air and chilled water flow rates, and this is not always the case in practice. Whether this assumption could affect the effectiveness of DCDV system is the subject of present investigation. A prototype that could enable the variation of outdoor air and chilled water flow rates, as well as indoor and outdoor conditions, was set up for laboratory experiments. Our results have illustrated the effectiveness of DCDV system in achieving the intended condensate-free objective which was most affected by the space-sensible heat ratio and chilled water flow rate. Little influence was found to be introduced by the outdoor air flow rate and outdoor air conditions. The results, through sensitivity and statistical analysis, were found consistent with results of our previous studies.
Original languageEnglish
Pages (from-to)651-658
Number of pages8
JournalIndoor and Built Environment
Volume25
Issue number4
DOIs
Publication statusPublished - 1 Jul 2016

Keywords

  • Dedicated ventilation
  • Dry cooling
  • Performance analysis
  • Variable chilled water flow rate
  • Variable outdoor air flow rate

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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