Begell House Inc.
Journal of Enhanced Heat Transfer
JEH(T)
1065-5131
11
2
2004
Enhanced Heat and Mass Transfer in the New Millennium: A Review of the 2001 Literature
87-118
10.1615/JEnhHeatTransf.v11.i2.10
Raj M.
Manglik
Thermal-Fluids and Thermal Processing Laboratory, Mechanical and Materials Engineering, University of Cincinnati, 2600 Clifton Ave, Cincinnati, OH 45220, USA
Arthur E.
Bergles
Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA; University of Maryland, College Park, MD, USA; Massachusetts Institute of Technology, Cambridge, MA, USA
An extended bibliography of 355 technical papers on enhanced, or augmented, heat and mass transfer that were published in 2001 is presented. The literature collection, which is classified in a currently used, but evolving, technique/device-heat/mass transfer mode taxonomy, is representative of the sustained interest in enhancement at the start of the third millennium. Given the growing demands for, and the consequent pressures on, the world's limited energy resources, research and development in the field are expected to grow as enhanced heat transfer provides attractive solutions for improving conversion and usage efficiencies. Also, efforts to advance the state of the art and bring about generational changes or evolution in heat and mass transfer enhancement technologies and their applications are highlighted, which provides some direction for future study and developments.
Bionic Optimization of Heat Transport Paths for Heat Conduction Problems
119-132
10.1615/JEnhHeatTransf.v11.i2.20
Zai-Zhong
Xia
Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China
Xin-Guang
Cheng
Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China
Zhi-Xin
Li
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education School of Aerospace, Tsinghua University; Department of Engineerig Mechanics, Tsinghua University, Beijing 100084, China
Zeng-Yuan
Guo
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Haidian District, Beijing 100084, China
A fundamental problem of heat conduction optimization, the design of the most effective heat transport path using a given volume of high conductivity material, was studied in this article. Analogous to natural selection, bionic optimization is developed to construct the optimal constructs of the high conductivity material. In the numerical simulation, the high conductivity material was treated as being alive, growing at the location with maximum temperature gradient. Then, the bionic optimization is effectively used to construct the heat transport paths for a square bar and volume-to-point problem with uniform or nonuniform heat sources.
Effects of Surface Coating on the Critical Heat Flux for Pool Boiling from a Downward Facing Surface
133-150
10.1615/JEnhHeatTransf.v11.i2.30
M. B.
Dizon
Department of Mechanical & Nuclear Engineering, Pennsylvania State University, University Park, PA 16802
J.
Yang
Department of Mechanical & Nuclear Engineering, Pennsylvania State University, University Park, PA 16802
Fan Bill
Cheung
Department of Mechanical & Nuclear Engineering, Pennsylvania State University, State College, PA, 16802
J. L.
Rempe
Idaho National Engineering and Environmental Laboratory, P.O. Box 1625, Idaho Falls, ID
Kune Yull
Suh
Department of Nuclear Engineering, Seoul National University, San 56-1, Sillim-dong, Kwanak-gu, Seoul 151-742, Korea
S.-B.
Kim
Korea Atomic Energy Research Institute, P.O. Box 105, Yuseoung, Taejon, Korea
As part of a joint U.S.−Korean International Nuclear Engineering Research Initiative investigating methods to enhance external reactor vessel cooling (ERVC) under severe accident conditions, it was proposed that surface coating be used to enhance the critical heat flux (CHF) for downward facing boiling. Toward this end, metallic microporous coatings were selected, and different compositions of the coating material were evaluated, in order to obtain a mixture with desirable qualities. Durability and adhesion tests were also done to study the performance of each of the resulting coatings. Quenching of the candidate coatings was then conducted under downward facing boiling conditions, using hemispherical test vessels to obtain the local boiling curves. Compared to a plain vessel surface under identical experimental conditions, considerable enhancement was observed in the critical heat flux for vessels with surface coatings. Optical and SEM (Scanning Electron Microscope) photos showed that the candidate coating possessed the desired porous microstructure with interconnecting channels and pores, leading to appreciable increases in the local CHF limits.
Using Capsulated Liquid Metal Fins for Heat Transfer Enhancement
151-160
10.1615/JEnhHeatTransf.v11.i2.40
Taha K.
Aldoss
Mechanical Engineering Department, Jordan University of Science and Technology, Irbid 22110, Jordan
Moh'd Ahmad
Al-Nimr
Jordan University of Science and Technology
This work introduces a novel method that enhances the heat transfer from a given surface by using a capsulated liquid metal fin. The thermal performance of this fin is estimated and compared with that of a conventional solid fin. It is found that using the capsulated fin may enhance the performance of an equal size conventional solid fin significantly. The effect of different design and operating parameters on the capsulated fin thermal performance is investigated. Two equal-size geometries for the capsulated fins longitudinal sectional area are investigated: the rectangular and the half-circular fins. It is found that the rectangular fins show better performance than that of the half-circular fins. Also, it is found that using the capsulated fin is justified in applications that involve a high base temperature, high height-to-width aspect ratio, and high external convective heat transfer coefficient.
Condensation Heat Transfer and Pressure Drop of Brazed Plate Heat Exchangers Using Refrigerant R-134a
161-182
10.1615/JEnhHeatTransf.v11.i2.50
Amir
Jokar
Exponent Inc.
Steven J.
Eckels
Institute for Environmental Research, Kansas State University, Manhattan, Kansas 66506, USA; Alan Levin Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan,
Kansas 66506, USA
Mohammad H.
Honsi
Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan KS 66506
Thomas P.
Gielda
Visteon Climate Control, 4500 Helm St./D175, Plymouth MI 48170
Experimental heat transfer and pressure drop results for two brazed plate heat exchangers (BPHE) of different sizes are presented in this article. The BPHEs are a type of compact plate heat exchanger with parallel corrugated plates that are brazed together in series. Water and a glycol/water mixture in the liquid phase were passed through the heat exchangers in a counter flow configuration, and relevant experimental data were collected. The Wilson technique was then used to obtain the single-phase heat transfer coefficient in the corrugated passages. The BPHEs were subsequently installed in a simple refrigeration cycle and the heat transfer coefficients and pressure drops during condensation of R-134a were measured. Empirical correlations for this type of plate heat exchangers were developed, plotted, and compared with relevant published results.