Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Electrohydrodynamically Enhanced Convective Boiling of Alternative Refrigerants: Fundamental Understanding and Applicability
Electrohydrodynamically (EHD) enhanced convective boiling, based on the extraction phenomenon, is experimentally investigated. The working fluids are R-134a and R-404A refrigerants. Both smooth and enhanced tubes are investigated in a horizontal configuration. The heat transfer enhancement and suppression with the corresponding pressure-drop data are presented. The ratio of EHD power consumption relative to the heat transferred was less than 1.5% for the data presented. A theoretical analysis is presented to determine the contributing terms of the EHD power consumption, and it was determined that the electric conduction mechanism was the primary contributing factor to current flow. The transient application of EHD, in the case that resulted in the suppression of the heat transfer under steady-state conditions, provided transient enhancements for convective boiling of R-404A in a horizontal smooth tube. Additionally, applicability of the EHD extraction phenomenon to convective boiling is discussed.
Electrohydrodynamically Enhanced Convective Boiling of Alternative Refrigerants: Fundamental Understanding and Applicability
Electrohydrodynamically (EHD) enhanced convective boiling, based on the extraction phenomenon, is experimentally investigated. The working fluids are R-134a and R-404A refrigerants. Both smooth and enhanced tubes are investigated in a horizontal configuration. The heat transfer enhancement and suppression with the corresponding pressure-drop data are presented. The ratio of EHD power consumption relative to the heat transferred was less than 1.5% for the data presented. A theoretical analysis is presented to determine the contributing terms of the EHD power consumption, and it was determined that the electric conduction mechanism was the primary contributing factor to current flow. The transient application of EHD, in the case that resulted in the suppression of the heat transfer under steady-state conditions, provided transient enhancements for convective boiling of R-404A in a horizontal smooth tube. Additionally, applicability of the EHD extraction phenomenon to convective boiling is discussed.
Electrohydrodynamically Enhanced Convective Boiling of Alternative Refrigerants: Fundamental Understanding and Applicability
Bryan, James E. (Autor:in) / Seyed-Yagoobi, Jamal (Autor:in)
HVAC&R Research ; 8 ; 337-355
01.10.2002
19 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
An Experimental Study of Convective Boiling of Refrigerants R-22 and R-410A
| British Library Conference Proceedings | 1998
An Experimental Study of Convective Boiling of Refrigerants R-22 and R-410A
| British Library Online Contents | 1998
Experimental Study of Electrohydrodynamically (EHD) Enhanced Evaporator for Nonazeotropic Mixtures
| British Library Online Contents | 1993
Convective Vaporization of Refrigerants in Tube Banks
| British Library Online Contents | 1993
Nucleate Boiling of Halocarbon Refrigerants: Heat Transfer Correlations
| Taylor & Francis Verlag | 2000