Thermal Performances Comparison between Dry-Coil and Wet-Coil Indirect Evaporative Cooler under the Same Configuration

Yi Chen, Hongxing Yang

Research output: Journal article publicationConference articleAcademic researchpeer-review

3 Citations (Scopus)


The indirect evaporative cooling (IEC) is an energy efficiency and environmental friendly air-conditioning device which cools the air by water evaporation. In the market, there're two kinds of IEC units, namely dry-coil IEC and wet-coil IEC. The only differences between them lie in the sequence of air humidification process and heat exchange process. In dry-coil IEC, the two processes are separated. The working air firstly being humidified and then proceed sensible heat exchange with the fresh air; while in wet-coil IEC, the two processes are simultaneous. The different arrangement may result in distinction of thermal performance. The paper presents the analytical models for dry-coil IEC and wet-coil IEC and compares their supply air temperature and cooling efficiency under the same configuration. The condensation and non-condensation statuses for both IEC types were discussed by simulation under a wide range of fresh air inlet parameters. The results show that the wet-coil IEC owns a higher efficiency and can provide lower temperature supply air either in condensation or non-condensation statuses. Besides, the efficiency of both types of IEC will be lowered once condensation occurs.
Original languageEnglish
Pages (from-to)3162-3167
Number of pages6
JournalEnergy Procedia
Publication statusPublished - 1 Jan 2015
Event7th International Conference on Applied Energy, ICAE 2015 - Abu Dhabi, United Arab Emirates
Duration: 28 Mar 201531 Mar 2015


  • comparison
  • condensation
  • dry-coil IEC
  • efficiency
  • simulation
  • wet-coil IEC

ASJC Scopus subject areas

  • General Energy


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