Abstract

On heated horizontal tubes (18mm O.D.) having the porous surface, a falling film of R-11 (flow rate 0.008-0.091 kg/(m.s)) was evaporated at atmospheric pressure. The heat transfer coefficient of liquid film evaporation is higher than that of pool boiling when the wall superheat is small ; however, the enhancement ratio reduces on the surface structure where the pool boiling heat transfer coefficient is already high. The appearance of dry spots on the porous surface was observed only at a small flow rate close to the threshold value for complete dry-out. Another advantage brought by the porous surface is the virtual elimination of hysteresis phenomena.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.