DOI: 10.1615/ICHMT.2015.THMT-15
ISBN Print: 978-1-56700-427-4
ISBN CD: 978-1-56700-428-8
Experimental study of heat and mass transfer of moist air in convective, asymmetric cooled, vertical gap flows
SINOPSIS
An experimental study of heat and mass transfer in convective flows of humid air has been performed in a vertical, one-sided cooled duct. The analysis of the results focusses on the heat transfer due to phase changes as a function of different wall, system and dew point temperatures. We introduce a set of characteristic numbers, which are deduced from the basic equations for mass, momentum, energy and diffusion to identify possible scaling relations. Experiments are performed within the parameter range of Re ~ 6.1 × 104, 0.025 ≤ Reδ ≤ 0.107, Pr ~ 0.71, Ja ~ 1.7 × 10−2 and Fr ~ 0.116. A linear relation between condensation and convective heat transfer is detected in this parameter range. The experimental results show good agreement with Nusselt's theory of laminar film condensation and Shah's correlation for condensation in vapour ?ows.