An experimental comparison of two multi-louvered fin heat exchangers with different numbers of fin rows

Doğan, Bahadır; Altun, Özge; Uğurlubilek, Nihal; Tosun, Mert; Sarıçay, T.; Erbay, L. Berrin

doi:10.1016/j.applthermaleng.2015.07.059

Cited by 37 publications

(14 citation statements)

References 23 publications

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“…To predict the timevarying performance of folded louvered fins in microchannel heat exchangers, a model was developed which successfully predicts the amount of heat transfer in these systems [12]. The transient and steady-state flow conditions in heat exchangers with double-row and triple-row multi-louvered fins were investigated in order to estimate the performance of these heat exchangers [13].…”

Section: Introductionmentioning

confidence: 99%

The effects of fin height, fin-tube contact thickness and louver length on the performance of a compact fin-and-tube heat exchanger

Javaherdeh¹,

Vaisi²,

Moosavi³

2018

IJHT

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In this paper, the effects of fin height, louver length and fin-tube contact thickness on the amount of heat transfer and pressure drop in a compact louvered fin-and-tube heat exchanger were studied experimentally and numerically using the − method. The effects of fintube contact thickness (with the variations of this thickness being more than or less than fin thickness variation) and fin height and also the relationship between Louvre length and fin height were examined. To validate the modeling, first, the numerical model was compared with an experimental prototype, and a good agreement was observed between the experimental and numerical results. The modeling results indicate that the increase in the fin-tube contact thickness, until the contact thickness becomes equal to fin thickness, leads to the improvement of heat exchanger performance; but beyond that, it is ineffective. Also, heat exchanger performance improves with the increase of louver length at a fixed fin height. According to the results, the minimum Louvre length should be 1.0 mm less than the fin height. An analytical equation relating Louvre length to fin height has been obtained, which agrees with model results by up to 98%.

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Section: Introductionmentioning

confidence: 99%

The effects of fin height, fin-tube contact thickness and louver length on the performance of a compact fin-and-tube heat exchanger

Javaherdeh¹,

Vaisi²,

Moosavi³

2018

IJHT

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“…However, the correlations of Stanton number, Colburn j-factor and friction factor are defined for a large range of Reynolds number and geometric descriptions for heat exchangers with multi-louvered fins, it is necessary that the performance of every new type of heat exchanger is analysed individually due to the complexity of the combined effects of geometrical and operational parameters [33].…”

Section: Heat Exchangers-advanced Features and Applicationsmentioning

confidence: 99%

Comprehensive Study of Heat Exchangers with Louvered Fins

Erbay¹,

Doğan²,

Öztürk³

2017

Heat Exchangers - Advanced Features and Applications

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The purpose of this chapter is to describe the basic physical features and the analysis of the thermal-hydraulic performance of the louver fins. The terminology which is used widely in the field of compact heat exchanger with louvered fin is described. The flow phenomenon affected by the operating conditions and the geometric parameters of the louvered fin is examined using the flow visualization techniques found in the literature. A methodology is given to calculate the heat transfer and the friction factor. Stanton number, Colburn j-factor and friction factor are defined as a performance criteria and the variations of these criteria with respect to the Reynolds number and the geometric parameters of the louvered fin. The combinations of these dimensionless number such as area goodness factor (j/f), volume goodness factor (j/f 1/3) and JF number related with the volume goodness factor are discussed in terms of overall performance criteria. Finally, the correlations of the louvered fin heat exchanger and their tabulated data was summarized.

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“…The geometric parameters of plate were also studied as the factors that influence the heat transfer and pressure drop of plate heat exchanger. Bahadır Dogan [7] compared the heat exchanger performance between double and multi-row fin heat exchanger by studying the exchanger side of air, studies showed that in quasi-steady state, the double fin heat exchanger with higher thermal performance and efficiency, and the friction factor is also high. Muley [8] noted the uneven distribution of the fluid in the plate heat exchanger was a major factor that affected the performance of the plate heat exchanger.…”

Section: Introductionmentioning

confidence: 99%