Using a chain recooling system on buildings in hot and humid climates

Wei Jen Chen*, David E. Claridge, Jiajun Liao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In hot and humid climates, warm outside air with rich moisture content impacts several aspects of building operation. To meet the ventilation requirement while maintaining indoor relative humidity (RH) at the desired level, dehumidification is usually required. This is typically done by cooling the air to 55 °F (12.8 °C). However, if the zone cooling load is low, then inefficient reheat may be necessary to maintain the indoor temperature set-point. To achieve better system efficiency, a new HVAC system concept called the “Chain Recooling System” is proposed. In this paper, it is shown that compared to a conventional Single Duct Variable Air Volume (SDVAV) system, the proposed system has the potential to provide better indoor air quality, eliminate the reheat requirement, and reduce fan energy consumption. To demonstrate the advantages of the proposed system, a building on the Texas A&M University campus in College Station, TX, is selected as a case study. It is projected that the HVAC system related energy consumption would be reduced by 15.2% and the average contaminant level would be reduced by 27% if the SDVAV system were replaced by the CRS without sacrificing comfort in the individual zones.

Original languageEnglish
Pages (from-to)85-95
Number of pages11
JournalBuilding and Environment
Volume129
DOIs
Publication statusPublished - 2018 Feb 1
Externally publishedYes

Keywords

  • Building efficiency
  • Chain recooling system
  • Hot and humid
  • Indoor air quality

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Geography, Planning and Development
  • Building and Construction

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