Influence of the louver and delta winglet geometry on the thermal hydraulic performance of a compound heat exchanger

Huisseune, Henk; T’Joen, Christophe; Jaeger, Peter De; Ameel, Bernd; Schampheleire, Sven De; Paepe, Michel De

doi:10.1016/j.ijheatmasstransfer.2012.10.016

Cited by 60 publications

(19 citation statements)

References 49 publications

(78 reference statements)

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“…The overall enhancement ratio is highest for the highest inclined angle. Variation of the geometry louvered strip insert includes pitch and slant angle were investigated by Huisseune et al [9]. They investigate the thermal and hydraulic performance of such a compound heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

“…From literatures [3][4][5][6][7][8][9][10], there are many aspects that influence the use of louvered strip insert (geometry, the arrangement to the flow direction, and shape of louvered strip insert). The main mechanism of heat transfer enhancement due to insertion include the reduction of the hydraulic diameter and induced swirling flow makes a better fluid mixing [11].…”

Section: Introductionmentioning

confidence: 99%

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Influences of pitch-length louvered strip insert on thermal characteristic in concentric pipe heat exchanger

Yaningsih

Wijayanta

2017

MATEC Web Conf.

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Abstract. The effects of pitch-length louvered strip inserts with a forward arrangement on heat transfer and friction factor characteristics in a concentric pipe heat exchanger were experimentally investigated. Louvered strip insert was installed inside the tube. For comparison, the experiment without louvered strip (plain tube) was conducted. All cases were tested under steady state condition for Reynolds number ranging from 5300-17,500. The results show that the utilization of louvered strip insert produced a higher heat transfer rate compare to a plain tube. Nusselt number, friction factor, and heat transfer coefficient ratio increased with decreasing pitch length. The Nusset number for louvered strip insert with S of 40, 50, and 60 mm increasing in the value of 67% -77%; 48% -53%; and 21% -24% than plain tube, respectively. While the tube fitted with louvered strip insert by S of 40, 50, and 60 mm, friction factor increased 2.91 -3.84; 2.41 -2.92; and 1.88 -2.08 times greater than a plain tube. The addition of louvered strip insert with S of 40, 50, and 60 mm producing heat transfer coefficient ratio in the range of 1.02 -1.12; 1.03 -1.07 and 1.03 -1.04.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influences of pitch-length louvered strip insert on thermal characteristic in concentric pipe heat exchanger

Yaningsih

Wijayanta

2017

MATEC Web Conf.

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“…Wind tunnel of rectangular shape was used to perform the test on louver assembly in the test rig. The condition of the air is at normal temperature and pressure as given in the reference [7].The dimension of the setup for the experimentation is as follows:-Linear length in the direction of the flow is 200 mm. It consists of 10 tubes along the complete length.…”

Section: Methodology a Experimental Set Upmentioning

confidence: 99%

“…and also we got the work done by H. Husseune. [7] on the louver fin which is very important in heat transfer enhancement. We have decided to work on this reference.…”

Section: IIImentioning

confidence: 99%

“…As it has been reported that the best parameter it had taken is the combination of louver angle, height ratio of the delta winglet, angle of attack of the delta winglet vortex generator, delta winglet aspect ratio and fin pitch(**). We have taken all the parameters except louver angle as constant as in the reference paper [7]. The detail of geometry taken for the test and simulation are explained in following chapters.…”

Section: IIImentioning

confidence: 99%

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Numerical and Experimental study of Louvered Fin Heat Exchangers and Increasing the Heat Transfer capacity by Geometrical and Flow parameters using CFD

Kumar¹

2017

IJRASET

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Louvered fin heat exchanger is a type of compact Heat exchanger that consists of a stack of alternate flat plates called parting sheets and corrugated fins, both being brazed together as a block. Streams exchange heat by flowing along the passages made by the fins between the parting sheets. Separating plates act as the primary heat transfer surfaces and the appendages known as fins act as the secondary heat transfer surfaces intimately bonded to the primary surface. Aluminium is the most commonly used material and stainless steel is employed in high pressure and high temperature applications. CFD Simulation results show an excellent flow phenomenon with the basis of stability and accuracy. Results show the best combination of the angle for optimum pressure drop and heat transfer rate. In current study the temperature drop is increase with increase in louver angle, turbulent is high near to the winglet. As the velocity of air is increase the temperature drop is decreased. We found that when louvered angle, velocity, pressure, Temperatures are the best combination of the angle for optimum pressure drop and heat transfer rate.

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Vortex Generators

Saha¹,

Ranjan²,

Emani³

et al. 2019

Heat Transfer Enhancement in Plate and Fin Extended Surfaces

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Influence of the louver and delta winglet geometry on the thermal hydraulic performance of a compound heat exchanger

Cited by 60 publications

References 49 publications

Influences of pitch-length louvered strip insert on thermal characteristic in concentric pipe heat exchanger

Influences of pitch-length louvered strip insert on thermal characteristic in concentric pipe heat exchanger

Numerical and Experimental study of Louvered Fin Heat Exchangers and Increasing the Heat Transfer capacity by Geometrical and Flow parameters using CFD

Vortex Generators

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