Revisiting radiant cooling: condensation-free heat rejection using infrared-transparent enclosures of chilled panels

Eric Teitelbaum, Adam Rysanek, Jovan Pantelic, Dorit Aviv, Simon Obelz, Alexander Buff, Yongqiang Luo, Denon Sheppard, Forrest Meggers

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

In this study, we enhance the understanding and design of a radiant cooling technology for outdoor comfort in tropical climates, originally proposed by R.N. Morse in 1963, in this journal. We investigate a type of radiant cooling methodology whereby the cold temperature source is physically separated from the outdoor environment by an insulated enclosure using a membrane transparent to infrared radiation. The enclosure isolates the radiant cooling surface from ambient conditions, allowing the radiant surface to be cooled significantly below ambient dew point temperatures without incurring condensation. For this new study, a Fourier Transform Infrared (FTIR) Spectroscopy analysis on three candidate membrane materials is undertaken and a prototype experimental test panel is fabricated. Our study shows that for a 5°C chilled panel temperature, the exterior membrane surface temperature reaches 26°C in a 32°C / 70% RH environment resulting in an effective mean radiant temperature of 15.8°C. These results provide new evidence in support of Morse's original proposal, that such panels could provide significant radiant cooling without condensation in humid environments. Radiant cooling products based on the studied technology may offer an ability to provide thermally comfortable conditions in hot environments without the energy required for dehumidification.

Original languageEnglish (US)
Pages (from-to)152-159
Number of pages8
JournalArchitectural Science Review
Volume62
Issue number2
DOIs
StatePublished - Mar 4 2019

All Science Journal Classification (ASJC) codes

  • Architecture

Keywords

  • Radiant cooling
  • spectral analysis
  • sub dewpoint
  • thermal comfort
  • thermal transparency

Fingerprint Dive into the research topics of 'Revisiting radiant cooling: condensation-free heat rejection using infrared-transparent enclosures of chilled panels'. Together they form a unique fingerprint.

Cite this