Download or read book Model of Critical Heat Flux in Subcooled Flow Boiling written by Mario Peter Fiori and published by . This book was released on 1968 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical phenomenon occurring before and at the critical heat flux (CHF) for subcooled flow boiling has been investigated. The first phase of this study established the basic nature of the flow structure at CHF. A photographic study of the flow in a glass annular test section was accomplished by using microflash lighting. The results showed that the flow structure at CHF for high heat flux (1 to 5 million Btu/hr-sq ft), high subcooling (50-110F), at low pressures (less than 100 psia) was slug or froth flow depending on the mass velocity. Nucleation was shown to exist in the superheated liquid film. Pin-holes in the burned-out test sections suggested that the CHF condition was extremely localized. Flow regime studies in tabular and annular geometries, using an electrical resistance probe, provided further evidence of the slug or froth nature of the flow, and also showed that dryout of the superheated liquid film was not responsible for CHF. Since this evidence was contradictory to previously formulated models of CHF, a new model was proposed. (Author).
Download or read book Critical Heat Flux in Subcooled Flow Boiling of Water written by Yuzhou Chen and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Critical Heat Flux in Subcooled Flow Boiling of Water.
Download or read book Critical Heat Flux in Subcooled Flow Boiling written by S. M. R. Azeem and published by . This book was released on 1998 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Regimes and Mechanistic Modeling of Critical Heat Flux Under Subcooled Flow Boiling Conditions written by Jean-Marie Le Corre and published by . This book was released on 2007 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal performance of heat flux controlled boiling heat exchangers are usually limited by the Critical Heat Flux (CHF) above which the heat transfer degrades quickly, possibly leading to heater overheating and destruction.
Download or read book Forced convection Boiling Near Inception in Zero Gravity written by Thomas H. Cochran and published by . This book was released on 1970 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forced-convection boiling at low heat flux and flow velocities in zero gravity for slightly subcooled distilled water.
Download or read book Modeling of Critical Heat Flux for Subcooled and Low quality Flow Boiling written by C. H. Lee and published by . This book was released on 1989 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Critical Heat Flux During Subcooled Flow Boiling in Rectangular Channels written by Ryo Nakajima and published by . This book was released on 1996 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Convective Flow Boiling written by John C. Chen and published by CRC Press. This book was released on 1996-07-01 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines current developments in the technology of flow boiling systems which are affected by convective flows. Written by acknowledged leaders in the field this book consists of revised papers presented at an international conference.
Download or read book A New Mechanistic Model of Critical Heat Flux in Forced convection Subcooled Boiling written by and published by . This book was released on 1997 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of its practical importance and various industrial applications, the process of subcooled flow boiling has attracted a lot of attention in the research community in the past. However, the existing models are primarily phenomenological and are based on correlating experimental data rather than on a first-principle analysis of the governing physical phenomena. Even though the mechanisms leading to critical heat flux (CHF) are very complex, the recent progress in the understanding of local phenomena of multiphase flow and heat transfer, combined with the development of mathematical models and advanced Computational Fluid Dynamics (CFD) methods, makes analytical predictions of CHF quite feasible. Various mechanisms leading to CHF in subcooled boiling have been investigated. A new model for the predictions of the onset of CHF has been developed. This new model has been coupled with the overall boiling channel model, numerically implemented in the CFX 4 computer code, tested and validated against the experimental data of Hino and Ueda. The predicted critical heat flux for various channel operating conditions shows good agreement with the measurements using the aforementioned closure laws for the various local phenomena governing nucleation and bubble departure from the wall. The observed differences are consistent with typical uncertainties associated with CHF data.
Download or read book Critical Heat Fluxes for curved and straight surfaces during subcooled flow boiling written by Thomas George Hughes and published by . This book was released on 1974 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental and analytical studies of the critical heat flux for subcooled flows of Freon 113 over concave, convex and straight surfaces have been conducted. Correlation functions for the critical heat flux on each surface have been developed from an idealized model of the vapor bubble cycle in nucleate boiling. These functions have been evaluated and compared with data collected in an experimental apparatus, constructed as part of this investigation. Details of the apparatus design and operating procedures are given.
Download or read book An Overview of Heat Transfer Phenomena written by Salim Newaz Kazi and published by IntechOpen. This book was released on 2012-10-31 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the wake of energy crisis due to rapid growth of industries, urbanization, transportation, and human habit, the efficient transfer of heat could play a vital role in energy saving. Industries, household requirements, offices, transportation are all dependent on heat exchanging equipment. Considering these, the present book has incorporated different sections related to general aspects of heat transfer phenomena, convective heat transfer mode, boiling and condensation, heat transfer to two phase flow and heat transfer augmentation by different means.
Download or read book Hydrodynamic Aspects of Boiling Heat Transfer written by N. Zuber and published by . This book was released on 1959 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Effects of Flow and Orientation on the Critical Heat Flux in Subcooled Forced Convection Boiling written by Matthew Joseph Brusstar and published by . This book was released on 1995 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Critical heat flux in subcooled flow boiling on finned and unfinned tube geometries written by S. Y. Shim and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prediction of Critical Heat Flux for Flow Boiling in Subcooled and Saturated Regimes written by Zhijian Deng and published by . This book was released on 1998 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Critical Heat Flux in Flow Boiling in Microchannels written by Sujoy Kumar Saha and published by Springer. This book was released on 2015-06-04 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Brief concerns the important problem of critical heat flux in flow boiling in microchannels. A companion edition in the SpringerBrief Subseries on Thermal Engineering and Applied Science to “Heat Transfer and Pressure Drop in Flow Boiling in Microchannels,” by the same author team, this volume is idea for professionals, researchers, and graduate students concerned with electronic cooling.
Download or read book Enhancement of Critical Heat Flux in Subcooled Flow Boiling Using Alcohol Additives and Twisted tape Inserts written by Ronald A. Pabisz (Jr.) and published by . This book was released on 1996 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
