Novel ventilation cooling system for reducing air conditioning in buildings. Part I: Testing and theoretical modelling

John Turnpenny, D.W. Etheridge, D.A. Reay

Research output: Contribution to journalArticlepeer-review

192 Citations (Scopus)


A latent heat storage unit incorporating heat pipes embedded in phase change material (PCM) is developed and tested for a novel application in low energy cooling of buildings. A one-dimensional mathematical model of the heat transfer from air to PCM is presented to allow sizing of a test unit. Details of the construction and testing of one heat pipe/PCM unit in a controlled environment are described, and measurements of heat transfer rate and melting times are presented. When the difference between air and PCM temperature was 5 °C, the heat transfer rate was approximately 40 W over a melt period of 19 h. The heat transfer rate could be improved, and the phase change time shortened, with an alternative design for finning of the heat pipe inside the PCM.
Original languageEnglish
Pages (from-to)1019-1037
Number of pages19
JournalApplied Thermal Engineering
Issue number11
Publication statusPublished - 1 Aug 2000


  • Air conditioning
  • Buildings
  • Energy conservation
  • Heat pipes
  • Heat storage
  • Heat transfer
  • Mathematical models
  • Ventilation
  • Phase change materials (PCM)
  • Cooling systems

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