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Surprising effects of combined vapour and liquid mass transfer resistances when condensing a mixture outside tube banks

Tord Karlsson (Institutionen för energi och miljö, Värmeteknik och maskinlära) ; Lennart Vamling (Institutionen för energi och miljö, Värmeteknik och maskinlära)
International Journal of Heat and Mass Transfer Vol. 48 (2005), p. 403-412.
[Artikel, refereegranskad vetenskaplig]

Detailed calculations are carried out for condensation of a binary zeotropic mixture outside a tube bank to investigate combined effects of mass transfer resistances in the liquid and vapour phases. The question is how a change in mass transfer resistance in the vapour phase can influence the heat flux. The surprising result is that a decrease in resistance in the vapour phase by reducing the tube pitch, and thus increasing the vapour velocity, reduces the heat flux between 20% and 50% for the conditions studied. This is due to a combination of mass transfer resistance, depletion of the heavy volatile component, and a reduction of the phase interface temperature.

Nyckelord: Condensation; Mixture; Tube bundle; Mass transfer resistance

Denna post skapades 2005-12-03. Senast ändrad 2015-02-11.
CPL Pubid: 5604


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Institutioner (Chalmers)

Institutionen för energi och miljö, Värmeteknik och maskinlära (2005-2014)



Chalmers infrastruktur