A Taguchi approach for investigation of heat transfer from a surface equipped with rectangular blocks

Bilen, Kadir; Yapıcı, Sinan; Çelik, Cafer

doi:10.1016/s0196-8904(00)00118-7

Cited by 51 publications

(28 citation statements)

References 12 publications

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“…The loss of heat due to conduction to the ambient was calculated by considering the natural convection situation as proposed by Incropera et al [30], and it was found to be less than 2 % of the heat input to the heater. The radiation losses considered in this study were less than 1 % for the polished aluminium channel of emissivity, as reported by Bilen et al [8]. Because the surface of the entire channel was insulated and was small in size, the heat loss due to the conduction was negligible.…”

Section: Methodssupporting

confidence: 67%

“…The Reynolds number is the ratio of the inertia force to the viscous force [16], and it is the most influencing factor on heat transfer, as in the study by [8]. The variation of the Nusselt number with Reynolds number is shown in Fig.…”

Section: Effect Of Inertia Forcementioning

confidence: 96%

“…They found that the Reynolds number had a strong effect on the flow, especially at s/d of 3.0 and 4.0 (s/d is the ratio of spacing between the blocks in stream-wise direction (s) to the size of the block (d)). The Taguchi approach is adapted by Bilen et al [8] to investigate the heat transfer from a surface mounted with rectangular blocks. These researchers reported that the most influencing parameter for increasing the heat transfer is the Reynolds number, and they reported that the turning angle is the second most influential parameter followed by the span-wise position of the blocks.…”

Section: Subscriptsmentioning

confidence: 99%

“…The discrete flow features, such as flow separation and reattachment, led to obvious differences in the spreading of the local convective heat transfer [18]. Figures 7,8,9,10,11 and 12 show the flow visualisation images for the square blocks and circular blocks cases with L x /L y ratios ranging from 1.5 to 2.5 for heat inputs 100 and 300 W for Reynolds number 100 and 300. From Figs.…”

Section: Effect Of Inertia Forcementioning

confidence: 99%

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Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

et al. 2015

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The present work experimentally investigates heat transfer enhancement from a channel mounted with staggered blocks. The effect of the geometrical parameters, such as the square and circular shapes of the blocks and the ratio of the centre to centre spacing between the blocks (L x /L y ratio) along the stream-wise direction and transverse direction of flow, has been investigated. Experiments were conducted using the newly developed experimental setup for Reynolds number ranging from 100 to 500 based on the hydraulic diameter and the average velocity of flow through the channel. The heat input values varied from 100 to 300 W with a step of 50 W, and water was used as working fluid. The results suggest that the variation of the Reynolds number significantly influenced the heat transfer enhancement compared with other geometrical parameters. The squareshaped block imposed greater impact on the heat transfer than the circular blocks. An increase in the heat transfer was observed while increasing the L x /L y ratios from 1.5 to 2.5 for the square blocks, whereas it was reduced for the circular blocks.

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Section: Methodssupporting

confidence: 67%

Section: Effect Of Inertia Forcementioning

confidence: 96%

Section: Subscriptsmentioning

confidence: 99%

Section: Effect Of Inertia Forcementioning

confidence: 99%

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Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

et al. 2015

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“…Performance prediction is then conducted for every case to find the best one. In this paper, the orthogonal design method [28][29][30][31][32] proposed by Taguchi is adopted to reduce the number of computational cases significantly but still be able to obtain a nearly optimum combination of major geometric factors.…”

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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Multi-objective Performance Optimization of a Ribbed Solar Air Heater

Sharma¹,

Choudhary

2019

Solar Energy

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A Taguchi approach for investigation of heat transfer from a surface equipped with rectangular blocks

Cited by 51 publications

References 12 publications

Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

Experimental Investigation on Heat Transfer Enhancement from a Channel Mounted with Staggered Blocks

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

Multi-objective Performance Optimization of a Ribbed Solar Air Heater

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