Direct contact condensation of vapor to falling cooled droplets
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説明
Abstract Direct contact condensation of vapor to falling cooled droplets identical in material with the vapor has been investigated experimentally and theoretically to utilize the subcooled state of the condensed liquid for enhancing a high performance condenser, namely the condensate collected upon disks is sprinkled into the surrounding vapor in droplets and the vapor is condensed around them. Heat transfer of direct contact condensation to a droplet is rate-controlled by the heat transfer in the droplet. Experimental results obtained in this study show a heat transfer coefficient about ten times higher than that of the solid sphere and about four times higher than the theoretical value, considering the circulate motion in the spherical droplet. To explain this discrepancy, a theoretical analysis has been carried out with adequate consideration to the deforming oscillation of the droplet due to surface tension and it is clarified that the analytical solution well explains the experimental results.
収録刊行物
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- International Journal of Heat and Mass Transfer
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International Journal of Heat and Mass Transfer 27 1631-1640, 1984-09-01
Elsevier BV