Heat Transfer Enhancement—The Maturing of Second-Generation Heat Transfer Technology

Bergles, A. E.

doi:10.1080/01457639708939889

Cited by 64 publications

(23 citation statements)

References 15 publications

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“…In many cases, a consensus is lacking in the technical community with respect to the dominant mechanisms of the heat transfer (in nucleate and transition boiling) and the degree to which the contribution of various mechanisms to total heat flux changes with wall superheat temperature and heater geometry [5]. In addition, a number of studies have focused on the enhancement of heat transfer, which is called the second generation heat transfer technology [12][13][14][15][16]. In the aspect of enhancement of boiling heat transfer, quite a few of studies have been carried out over the past years to improve heat transfer rate and energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…In the aspect of enhancement of boiling heat transfer, quite a few of studies have been carried out over the past years to improve heat transfer rate and energy efficiency. An exhaustive compilation of the relevant literature has been presented by Bergles [12][13][14]16], Webb and Bergles [15], Bergles et al [17], Thome [18], Webb and Kim [19]. Heat transfer enhancement technology is generally classified as active heat transfer enhancement technology, passive heat transfer enhancement technology and compound heat transfer enhancement technology which combines at least two heat transfer enhancement methods [19].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Cheng

Mewes

Luke

2007

International Journal of Heat and Mass Transfer

171

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Cheng

Mewes

Luke

2007

International Journal of Heat and Mass Transfer

171

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“…To improve the overall performance of a heat exchanger effectively, including the reduction of its size and saving of energy for its operation [1], many augmentation techniques have been reported and extensive data on the basic heat transfer and friction characteristics have been published [2][3][4][5]. An effective performance comparison method of these enhanced techniques for a specified purpose at some given operating conditions is very useful for users to select a required technique appropriately.…”

Section: Introductionmentioning

confidence: 99%

A new performance evaluation method and its application in fin-tube surface design of small diameter tube

Fan

Ding

et al. 2010

Front. Energy

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In this paper, a simple yet efficient performance comparison method is proposed based on the assumptions of constant properties and identical frontal area. For this method, no correlations are required, and a small number of discrete data are sufficient. To illustrate the feasibility of the proposed approach, a new slotted fin with 4 mm tubes is designed to replace the original louvered fin with tubes of 7 mm. The orthogonal design method is adopted in the fin design to reduce the number of computational cases significantly, and yet a nearly optimum combination of major geometric factors can still be obtained. The reasonable parametric combination of 3 global parameters is obtained by analyzing the numerical results of 16 plain plate fins. Based on this result, 3 new slotted fins with different fin pitches are studied. The slotted fin with a fin pitch of 1.4 mm is recommended after considering the heat transfer, comprehensive performance, and cost of material and operation. The result shows that compared with the original louvered fin, the recommended fin not only increases the heat transfer rate by 2.2%, 22.5%, and 13.7% under an identical flow rate, identical pressure drop, and identical pumping power constraint, respectively, but also saves approximately 36% of the copper tube materials.

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“…If the performance and efficiency of thermal systems in various industries can be vastly improved, the size of heat exchangers will be reduced and, thereby, a large amount of costs and spaces will be saved. The enhancement (or augmentation) of heat transfer has become an important factor in achieving these goals [1][2][3][4][5]. One of the important challenges in the design of heat exchangers is the enhancement of single-phase heat transfer, especially, when heat exchangers have a single-phase fluid flow on one side and a two-phase flow or phase change on the other side.…”

Section: Introductionmentioning

confidence: 99%

Study of Single Phase Flow Heat Transfer and Friction Pressure Drop in a Spiral Internally Ribbed Tube

Cheng

Chen

2006

Chem Eng & Technol

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The experimental results of single‐phase flow heat transfer and pressure drop experiments in the turbulent flow regime in a spirally ribbed tube and a smooth tube are presented in this paper. The ribbed tube has an outside diameter of 22 mm and an inside diameter of 11 mm (an equivalent inside diameter of 11.6 mm) and the smooth tube has an outside diameter of 19 mm and an inside diameter of 15 mm. Both tubes were uniformly heated by passing an electrical current along the tubes with a heated length of 2500 mm. The working fluids are water and kerosene, respectively. The experimental Reynolds number is in the range of 104–5 · 104 for water and is in the range of 104–2.2 · 104 for kerosene. The experimental results of the ribbed tube are compared with those of the smooth tube. The heat transfer coefficients of the ribbed tube are 1.2–1.6 fold greater than those in the smooth tube and the pressure drop in the ribbed tube is also increased by a factor of 1.4–1.7 as compared with those in the smooth tube for water. The corresponding values for kerosene are 2–2.7 and 1.5–2, respectively. The heat‐transfer enhancement characteristics of the ribbed tube are assessed. This tube is especially suitable for augmenting single‐phase flow heat transfer of kerosene. Correlations for the heat transfer and the pressure drop for the spirally ribbed tube are proposed, according to the experimental data.

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Heat Transfer Enhancement—The Maturing of Second-Generation Heat Transfer Technology

Cited by 64 publications

References 15 publications

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

Boiling phenomena with surfactants and polymeric additives: A state-of-the-art review

A new performance evaluation method and its application in fin-tube surface design of small diameter tube

Study of Single Phase Flow Heat Transfer and Friction Pressure Drop in a Spiral Internally Ribbed Tube

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