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Studies of boiling heat transfer with electrical fields: Part I. Effect of applied A. C. voltage on boiling heat transfer to water in forced circulation
Author(s) -
Markels Michael,
Durfee Robert L.
Publication year - 1965
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690110428
Subject(s) - nucleate boiling , boiling , critical heat flux , heat transfer , thermodynamics , heat flux , chemistry , annulus (botany) , forced convection , convection , materials science , mechanics , composite material , physics
Alternating current voltage (60 cycles/sec.) was found to increase boiling heat transfer rates and prevent film boiling for deionized water under forced convection at essentially ambient pressure. Steam was used to supply heat to the interior wall of a 0.292‐in. thick annulus, and voltages up to 5,000 v. were impressed across the region of vapor formation. The highest heat transfer rates reached were approximately twice the normal nucleate boiling peak. The application of voltage increased the boiling heat transfer over the entire range tested—mass flow rates up to 5.2 × 10 5 lb./hr.‐sq.ft. and exit qualities up to 4% by weight vapor. Data obtained from tests in which the external wall of the flow annulus was heated indicated an increase in heat flux up to 2,000 v., followed by a decrease in heat flux at voltages above 2,000 v.