Horizontal-tube falling-film evaporation with structured surfaces
Journal Article
·
· J. Heat Transfer; (United States)
Extensive experimental tests for tubes with commerical structured surfacesin a horizontal single-tube falling-film evaporator were conducted. The testsections were hollow copper cylinders with GEWA-T, Thermoexcel-E, or High Fluxsurfaces electrically heated by inserted cartridge heaters. A smooth surfacecylinder was also tested for reference. All tubes were tested in both poolboiling and falling-film evaporation with water. The results reveal thatfalling-film evaporation provides much higher heat transfer coefficients thanpool boiling in the low heat flux, convective region. The GEWA-T surfaceenhances heat transfer through its increased and accessible area, whileThermoexcel-E and High-Flux demonstrate high heat transfer performances becauseof enhanced nucleate boiling. The falling-film evaporation data for thestructured surfaces either merge or show a tendency to merge with the respectivepool boiling curves at high heat fluxes. Unusual incipient boiling behaviorof Thermoexcel-E and the effects of factors such as surface aging, surfacesubcooling, film flow rate liquid feed height, and rate of heat flux change,are described.
- Research Organization:
- Assistant Professor, Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409-4289 Assoc. Mem. ASME(US); Professor, Department of Mechanical Engineering, Aeronautical Engineering, and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180-3590 Fellow ASME
- OSTI ID:
- 6251896
- Journal Information:
- J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 111:2; ISSN JHTRA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of oil contamination on the nucleate pool-boiling behavior of R-114 from enhanced surfaces. Master's thesis
Pool boiling heat transfer from enhanced surfaces to dielectric fluids
On falling film evaporator – A review of mechanisms and critical assessment of correlation on a horizontal tube bundle with updated development
Technical Report
·
Sun Jun 01 00:00:00 EDT 1986
·
OSTI ID:6920839
Pool boiling heat transfer from enhanced surfaces to dielectric fluids
Journal Article
·
Sat May 01 00:00:00 EDT 1982
· J. Heat Transfer; (United States)
·
OSTI ID:5222680
On falling film evaporator – A review of mechanisms and critical assessment of correlation on a horizontal tube bundle with updated development
Journal Article
·
Tue Dec 05 19:00:00 EST 2023
· International Communications in Heat and Mass Transfer
·
OSTI ID:2251580