Performance analysis of desiccant dehumidification systems driven by low-grade heat source

Jongsoo Jeong, Seiichi Yamaguchi, Kiyoshi Saito, Sunao Kawai

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

If a desiccant dehumidification system can be driven by a heat source whose temperature is below 50 °C, exhaust heat from devices such as fuel cells or air conditioners can be used as its heat source, thereby saving energy. Therefore, in this study, we used a previously validated simulation model to determine the minimum heat source temperature for driving a desiccant dehumidification system. We considered four desiccant dehumidification systems that can be driven by waste heat - conventional desiccant-type systems (wheel type and batch type with only desiccant), a system with a precooler, double-stage-type systems (a type with two desiccant wheels and a four-partition desiccant wheel type), and a batch-type system with an internal heat exchanger. We found that among these systems, the last system can be driven by the lowest heated air temperature - approximately 33 °C - which is considerably lower than that of the conventional system.

Original languageEnglish
Pages (from-to)928-945
Number of pages18
JournalInternational Journal of Refrigeration
Volume34
Issue number4
DOIs
Publication statusPublished - 2011 Jun 1

Keywords

  • Air conditioning
  • Dehumidification
  • Desiccant
  • Desiccant wheel
  • Optimization
  • Silica gel

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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