Three-dimensional performance analysis of plain fin tube heat exchangers in transitional regime

Bhuiyan, Arafat A.; Amin, M. Ruhul; Islam, Ariful

doi:10.1016/j.applthermaleng.2012.07.034

Cited by 86 publications

(31 citation statements)

References 15 publications

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“…This model is widely used and is a tested turbulence model. A numerical study considering various turbulent models and their effectiveness in the transitional regime for similar geometries has been conducted recently (Bhuiyan et al, 2012a;Bhuiyan et al, 2012b). The suitability of the k-ω turbulent model has been evaluated comparing other models with the turbulent model and considerable success has been achieved in predicting performance by using this model.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore the suitability of any particular turbulence model for the practical applications of the plate-fin heat exchanger is not addressed. This author studied the suitability of different turbulent models, the k-ɛ model, RNG k-ɛ model, and k-ɷ model and finally k-ɷ model was considered an appropriate choice for turbulent flow (Bhuiyan, Islam, & Amin, 2012a).This author has previously also investigated the flow characteristics for plain and wavy fin tube staggered and inline arrangements for laminar and transitional flow range (Bhuiyan et al, 2012a;Bhuiyan, Amin, & Islam, 2012b;Bhuiyan, Islam, & Amin, 2011). The effects of different geometric parameters such as longitudinal, pitch, transverse pitch, and fin pitch for plain fin, as well as wavy angle and wavy height for the wavy fin have also already been investigated, but all these studies were limited for laminar to the transitional range.…”

Section: Introductionmentioning

confidence: 99%

“…The effects of different geometric parameters such as longitudinal, pitch, transverse pitch, and fin pitch for plain fin, as well as wavy angle and wavy height for the wavy fin have also already been investigated, but all these studies were limited for laminar to the transitional range. In this study, the simulation results for plain fin, considering staggered arrangements for turbulent (2100 ≤ Re H ≤ 7000) flow range, will be investigated to determine their effect on the heat transfer and pressure drop performance based on the available experimental data of (Yuan, 2000)and as a continuation of the numerical work of the authors for laminar flow (Bhuiyan et al, 2011)and transitional flow (Bhuiyan et al, 2012a;Bhuiyan et al, 2012b). A detailed analysis of the effect of the geometrical parameters mentioned above will also be presented.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

Amin¹,

Karim²,

Islam³

2014

Int J Automot Mech Eng

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In the current study, the air-side turbulent thermal and hydraulic characteristics of finned tube heat exchanger of staggered tube arrangement are simulated with steadystate solvers using ANSYS CFX12.0, a Commercial CFD code for turbulent flow regimes. The k-ω model was used to predict the turbulent flow characteristics through the finned tube heat exchanger. The level of confidence of this numerical model was based on a comparison with previous experimental data from the literature, comparing the friction factor f and Colburn factor j, and reasonable agreement is found between the simulations and experimental data. Detailed analysis of the effect of thermal and hydraulic performance of related parameters such as longitudinal pitch, transverse pitch, and fin pitch are also critically evaluated for turbulent flow regime. The increase in the longitudinal pitch and transverse pitch causes a decrease in the heat transfer and pressure drop performance as the flow becomes free and less compact with the increase in the tube pitch. The effect of fin pitch on the heat exchanger performance demonstrates that a decrease in the fin pitch shows the opposite performance to that of the longitudinal and transverse pitches.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

Amin¹,

Karim²,

Islam³

2014

Int J Automot Mech Eng

Self Cite

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“…An et al [15] analyzed the detailed phenomenon in a fin-tube heat exchanger, predicted the heat transfer characteristics of the wave-fin heat exchangers using Fluent, and captured the flow characteristics. Bhuiyan et al [16] investigated the heat transfer and fluid flow characteristics of a four-row plain fin-and-tube heat exchanger using the CFD simulations. The effects of Reynolds number, fin pitch, and tube pitches on the overall heat transfer and friction factor for plate fin-and-tube heat exchangers were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of an Evaporator for a Diesel Engine–Organic Rankine Cycle (ORC) Combined System and Influence of Pressure Drop on the Diesel Engine Operating Characteristics

et al. 2015

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Abstract:The main purpose of this research is to analyze the performance of an evaporator for the organic Rankine cycle (ORC) system and discuss the influence of the evaporator on the operating characteristics of diesel engine. A simulation model of fin-and-tube evaporator of the ORC system is established by using Fluent software. Then, the flow and heat transfer characteristics of the exhaust at the evaporator shell side are obtained, and then the performance of the fin-and-tube evaporator of the ORC system is analyzed based on the field synergy principle. The field synergy angle (β) is the intersection angle between the velocity vector and the temperature gradient. When the absolute values of velocity and temperature gradient are constant and β < 90°, heat transfer enhancement can be achieved with the decrease of the β. When the absolute values of velocity and temperature gradient are constant and β >90°, heat transfer enhancement can be achieved with the increase of the β. Subsequently, the influence of the evaporator of the ORC system on diesel engine OPEN ACCESSEnergies 2015, 8 5489 performance is studied. A simulation model of the diesel engine is built by using GT-Power software under various operating conditions, and the variation tendency of engine power, torque, and brake specific fuel consumption (BSFC) are obtained. The variation tendency of the power output and BSFC of diesel engine-ORC combined system are obtained when the evaporation pressure ranges from 1.0 MPa to 3.5 MPa. Results show that the field synergy effect for the areas among the tube bundles of the evaporator main body and the field synergy effect for the areas among the fins on the windward side are satisfactory. However, the field synergy effect in the areas among the fins on the leeward side is weak. As a result of the pressure drop caused by the evaporator of the ORC system, the diesel engine power and torque decreases slightly, whereas the BSFC increases slightly with the increase of exhaust back pressure. With the increase of engine speed, power loss, torque loss, and BSFC increment increase gradually, where the most significant change is less than 1%. Compared with the diesel engine itself, the maximum increase of power output of the diesel engine-ORC combined system is 6.5% and the maximum decrease of BSFC is 6.1%.

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“…Recently, Yaïci et al (2014) presented a study regarding the effect of air maldistribution at the inlet of a round tube plate fins HEs. They employed a commercial CFD, which first was validated with success using both experimental data and another CFD model (Bhuiyan et al, 2013). The application of the validated CFD model led to affirm that the air maldistribution affected considerably the values of some parameters, such as the Colburn factor (or heat transfer coefficient), friction factor and hence, on the air temperature distribution and pressure drop throughout the heat exchanger.…”

Section: Airflow Maldistribution: Experimental and Numerical Studiesmentioning

confidence: 99%

Analysis of the condensation process and air maldistribution in finned tube and minichannel condensers

Pisano¹

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Three-dimensional performance analysis of plain fin tube heat exchangers in transitional regime

Cited by 86 publications

References 15 publications

Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

Plate Fin and Tube Heat Exchanger Modeling: Effects of Performance Parameters for Turbulent Flow Regime

Performance Analysis of an Evaporator for a Diesel Engine–Organic Rankine Cycle (ORC) Combined System and Influence of Pressure Drop on the Diesel Engine Operating Characteristics

Analysis of the condensation process and air maldistribution in finned tube and minichannel condensers

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