Proposal of an eco-friendly high-performance air-conditioning system part 2. Application of evapo-transpiration condenser to residential air-conditioning system

Huynh Thi Minh Thu, Haruki Sato

Research output: Contribution to journalArticle

5 Citations (Scopus)


Improving performance of existing air-conditioning system and minimizing its environmental effect are requested from global environmental issues. A new air-conditioning system using evapo-transpiration condenser has been proposed. Evapo-transpiration condenser is a condenser that uses transpiration by keeping condenser surface wet and water evaporation enhancing heat-transfer rate. In this paper, a prototype of the new system is tested and compared with the existing system in summer weather of Japan. Hourly-average condenser-temperature is achieved to be 5-10 C reduction compared to that of the air-cooled condenser. Without any optimization in system operation, up to more than 30% hourly integral power consumption is saved at ambient temperature below 31 C from this prototype. Besides, temperature of outlet-air from outdoor-unit is nearly the same as ambient temperature, while its relative humidity is slightly higher. Special maintenance is not necessary for the new evapo-transpiration condenser.

Original languageEnglish
Pages (from-to)1596-1601
Number of pages6
JournalInternational Journal of Refrigeration
Issue number6
Publication statusPublished - 2013 Sep 1



  • Air conditioning
  • Energy saving
  • Evapo-transpiration condenser
  • Heat island
  • Waste-heat

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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