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HomeThe heat transfer coefficient as a function of steam quality for high-pressure once through flow boiling, with determination of the transition points between the regions of particular heat transfer
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In a "once through" process in which water at a temperature far below the saturation temperature enters the tube, and leaves it as superheated steam, the heat transfer takes place according to different mechanisms each of which is active over a limited length of the tube. As far as the present state of knowledge permits, the heat transfer coefficient for a particular heat transfer region is determined analytically as a function of the mathematical steam quality X, for different heat and mass fluxes and pressures between 170 and 210 bar. Also, for X values indicating the transition between the different regions of heat transfer, equations have been set up as functions of the same parameters. The theoretical background of these equations differs in some cases from the actual theories. Maybe one of the most unconventional approaches to the problem is the assumption that the pipe length over which film boiling takes place can be determined by using an analogy with a water-jet-gas-pump aggregate. This method indeed seems to give a useful correlation equation.
- Published:
- Corporate author(s): Joint Research Centre – Ispra (Joint Research Centre)
- Personal author(s): Nobel, L
- Themes: Scientific and technical research
- Subject: physical sciences , research report , scientific research
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| ISSN | ISBN | DOI | Catalogue number CD-NA-04-561-EN-C |
- Released on EU publications website:
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