A comparative study of compact enhanced fin-and-tube heat exchangers

Wang, Chi-Chuan; Lee, Wei Song; Sheu, Wen-Jenn

doi:10.1016/s0017-9310(01)00011-4

Cited by 126 publications

(42 citation statements)

References 11 publications

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“…Manglik et al [14] presented an overview of previous correlations for the slit fin geometry and a new correlation. Based on a large database of experimental data, thermo-hydraulic correlations were derived for the slit fin (Wang et al [15]) and for the louvered fin (Wang et al [16]). Next to these full scale heat exchanger tests, some authors have focused on the flow behaviour within these interrupted fin designs, in order to better grasp the physics of the heat transfer enhancement.…”

Section: Main Flow Manipulationmentioning

confidence: 99%

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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In this study the inclined louvered fin, a hybrid fin design based on the slit fin and louvered fin design is considered. The goal of the research program is to investigate the interaction between the flow behaviour (flow deflection and transition to unsteady flow) and the thermo-hydraulics of the fin design. This approach was selected in order to reveal the flow physics behind the transitions found in the thermo-hydraulic data.

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Section: Main Flow Manipulationmentioning

confidence: 99%

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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“…Overall thermal performance of the heat exchanger can be expressed as a ratio of the pumping power to the transferred heat, as dimensionless index Figure 10 shows the effect of the geometry parameters on the performance calculated using (8). Rapid performance drop can be observed in all cases for louver angles larger than 40 • .…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The louvers act to interrupt the air flow and create a series of thin boundary layers which have lower thermal resistance than the thick boundary layers on the plain fins [7]. Optimization of heat exchanger geometry may considerably improve energy savings in these systems [8]. On the other hand, improved efficiency leads to reduced exchanger size, thus significantly reduces its manufacturing cost, and annual energy expenditures related to pumping [9].…”

Section: Introductionmentioning

confidence: 99%

Parametric study of fluid flow and heat transfer over louvered fins of air heat pump evaporator

Muszyński¹,

Kozieł²

2016

Archives of Thermodynamics

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Two-dimensional numerical investigations of the fluid flow and heat transfer have been carried out for the laminar flow of the louvered fin-plate heat exchanger, designed to work as an air-source heat pump evaporator. The transferred heat and the pressure drop predicted by simulation have been compared with the corresponding experimental data taken from the literature. Two dimensional analyses of the louvered fins with varying geometry have been conducted. Simulations have been performed for different geometries with varying louver pitch, louver angle and different louver blade number. Constant inlet air temperature and varying velocity ranging from 2 to 8 m/s was assumed in the numerical experiments. The air-side performance is evaluated by calculating the temperature and the pressure drop ratio. Efficiency curves are obtained that can be used to select optimum louver geometry for the selected inlet parameters. A total of 363 different cases of various fin geometry for 7 different air velocities were investigated. The maximum heat transfer improvement interpreted in terms of the maximum efficiency has been obtained for the louver angle of 16• and the louver pitch of 1.35 mm. The presented results indicate that varying louver geometry might be a convenient way of enhancing performance of heat exchangers.

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“…가스쿨러와 증발기에서의 열전달과 압력강하를 해 석하기 위해 냉매의 열전달계수 및 마찰계수는 Yoon et al (7) 의 식을 적용하였고, 핀-관 열교환기의 열전달 매개체로 이용되는 공기의 열전달계수와 마찰계수는 Wang et al (8) 이 제안한 상관식을 사용하였다.…”

Section: 공기와 냉매측 열전달 및 압력강하unclassified

Performance Simulation of a R744 Refrigeration System in a Refrigerator Truck under a Frost Condition

Kim¹,

Myoung

Cho

2013

Korean Journal of Air-Conditioning and Refrigeration Engineerin

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R744 has been appropriated for substitute refrigerant, because of its high stability, and environment-friendly nature as a natural refrigerant. To analyze the cooling performance of a refrigeration system in a refrigerator truck using R744 according to the blocking ratio, an analytical model of the refrigeration system was developed under frost conditions, using EES. The performance of the refrigeration system was predicted with the indoor and outdoor air temperature, outdoor air velocity, and compressor speed. As a result, the system performance decreased, with the increase of frost growth. When the blocking ratio was 40.4% in the basic condition, the refrigeration capacity was decreased by 27.1%, compared to the non-frost condition. Key words R744(이산화탄소), COP(성능계수), Blocking ratio(차단비), Frost(서리), Fin-tube(핀-관)

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A comparative study of compact enhanced fin-and-tube heat exchangers

Cited by 126 publications

References 11 publications

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Parametric study of fluid flow and heat transfer over louvered fins of air heat pump evaporator

Performance Simulation of a R744 Refrigeration System in a Refrigerator Truck under a Frost Condition

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