An overview on thermal and fluid flow characteristics in a plain plate finned and un-finned tube banks heat exchanger

Tahseen, Tahseen Ahmad; Ishak, M.; Rahman, M. M.

doi:10.1016/j.rser.2014.10.070

Cited by 91 publications

(27 citation statements)

References 139 publications

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“…There are a significant number of experimental studies [2][3][4][5][6][7][8][9][10][11][12] that investigate heat transfer characteristics and pressure drop in tube banks and a greater number of numerical studies [13][14][15][16][17][18][19][20][21][22][23][24] on those subjects as well. Although most of the aforementioned studies focus on heat transfer and pressure drop, more detailed studies investigate entropy generation as well as energy and exergy efficiencies of tube banks and HRSG systems.…”

Section: Literature Reviewmentioning

confidence: 99%

Second law optimization of heat exchangers in waste heat recovery

Erguvan

MacPhee

2019

Int J Energy Res

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Summary This paper numerically investigates the first and second law efficiencies of transient crossflow over tube banks. A significant number of simulations were performed using a commercial computational fluid dynamics (CFD) tool, ANSYS Fluent 18.2, with varying inlet temperature, Reynolds number, pitch ratio (PR), number of inline cylinders, and heat transfer coefficient defining a heat leakage on the system. Numerical results compare favorably with published data in terms of Nusselt number and pressure drop. Five hundred seventy‐six simulations were performed, and energy efficiencies ranged from 72% to 99%, while exergy efficiencies ranged from 26% to 70%. No discernable, universal trends were observed across all data sets, but the staggering amount of results spans a wide range of operational characteristics for tube bundle waste heat recovery. To illustrate the insight such data can provide, we consider four sample cases for analysis: well‐insulated low‐grade heat recovery, poorly insulated low‐grade heat recovery, well‐insulated high‐grade heat recovery, and poorly insulated high‐grade heat recovery. Low‐ and high‐grade heat recovery cases were simulated with differing inlet heat transfer fluid (HTF) values, and heat leakage was introduced as a source term in the 2D energy equation. Detailed descriptions of the efficiencies of all cases are described, with references to the immense body of simulation data included in the appendix. Overall, the highest efficiencies of the first and second laws were obtained in domains that have three cylinders and inlet temperature of 500 K and eight cylinders and an inlet temperature of 400 K, respectively. The main findings of this study could be beneficial in designing a highly efficient waste heat recovery system, especially when source temperatures vary.

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Section: Literature Reviewmentioning

confidence: 99%

Second law optimization of heat exchangers in waste heat recovery

Erguvan

MacPhee

2019

Int J Energy Res

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“…The Grimison experimental model for staggered or aligned tubes arrangements was developed in 1937 to calculate the average Nusselt number for a tube bundle by the following correlation [14], [15], [16]:…”

Section: ❖ Grimison Modelmentioning

confidence: 99%

“…The Zhukauskas model, published in 1972, was proposed as a result of experimental studies with an accuracy of ±15% [15], [17]. This model is governed by the following correlation [12], [15], [19], [20]:…”

Section: ❖ Zhukauskas Modelmentioning

confidence: 99%

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Concentration solar dryer water-to-air heat exchanger: Modeling and parametric studies

Bououd

Mechaqrane

2017

International Journal of Hydrogen Energy

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“…Owing to its ease of processing and installment, as well as low cost and proven technique [6,7], finned tube heat exchanger has been widely applied in fields of air conditioner [8][9][10][11] and power plant [12][13][14]. In traditional air conditioning system, the finned tube heat exchanger can only exchange sensible heat.…”

Section: Introductionmentioning

confidence: 99%