Validation of radiant and convective heat transfer models of photonic membrane using non-invasive imaging of condensation pattern

E. Teitelbaum, D. Aviv, M. Hou, J. Li, A. Rysanek, F. Meggers

Research output: Contribution to journalConference articlepeer-review

Abstract

Cooling a sample of a material until condensation is observed is a standard technique for accurately measuring the dewpoint and associated relative humidity in a volume. When conducting an experiment with a membrane-assisted radiant cooling panel, we found that membrane surface temperatures were difficult to measure directly. Instead, the onset of condensation was used to infer the membrane's surface temperature. However, the radiant cooling panels displayed variations of membrane surface temperature at steady state, and thus a resulting condensation contour was observed, forming a curve on which the membrane surface temperature was accurately known and constant - the dewpoint. The curve was in equilibrium between the internal panel temperature driven by internal free convection in the air gap and the view factor to surrounding surfaces, which can be evaluated at each point along the curve. In this paper, we assess the convective and radiative heat transfer balances using simulations. Our methods expand the “sensing” of condensation to provide information about view factor and thermal stratification, both of which are quantities that are difficult to measure adequately in the field.

Original languageEnglish (US)
Article number012100
JournalJournal of Physics: Conference Series
Volume2069
Issue number1
DOIs
StatePublished - Dec 2 2021
Event8th International Building Physics Conference, IBPC 2021 - Copenhagen, Virtual, Denmark
Duration: Aug 25 2021Aug 27 2021

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Validation of radiant and convective heat transfer models of photonic membrane using non-invasive imaging of condensation pattern'. Together they form a unique fingerprint.

Cite this