Pressure Drop and Heat Transfer Characteristics of Louvered Fin Heat Exchangers

Amirnordin, Shahrin Hisham; Didane, Djamal Hissein; Mansor, Mohd Norani; Khalid, Amir; Seri, Suzairin Md; Raghavan, Vijay R.

doi:10.4028/www.scientific.net/amm.465-466.500

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…The air flow tends to be in the same direction as the louver‐directed flow, which leads to higher heat transfer efficiency and better performance. Amirnordin et al 13 used ANSYS Fluent simulations to analyze the effects of louver fin structural parameters on the overall performance. Shojaeefard et al 14 performed multiple target optimization on the air side of microchannel condensers using genetic algorithm, thereby enhancing the optimized condenser heat‐transfer rate by 3.97% and reducing the corresponding pressure drop by 8%.…”

Section: Introductionmentioning

confidence: 99%

Design and performance optimization of microchannel condensers for electric vehicles

Liu

et al. 2021

Int J Energy Res

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Summary Conventional air conditioning systems for electric vehicle have insufficient performance. Therefore, the structures on both sides of microchannel condensers must be optimized to improve their thermal hydraulic performance and enhance the COP of the air‐conditioning system in electric vehicles. Through numerical calculations and experiments, the thermal hydraulic performance of microchannel condensers were evaluated to determine the optimal values of the microchannels number, flat‐tube hole aspect ratio, flow passes, and fin pitch. The results obtained using established numerical calculation models have certain reliability with errors within ±5.6%. The results reveal that the heat exchange performance of the microchannel condensers could be enhanced by appropriately reducing the fin pitch at certain frontal air velocities. Additionally, this causes a rapid increase in air flow resistance. When the flat‐tube hole aspect ratio is 1.15 and the number of flat‐tube channels is 10, the microchannel heat exchanger demonstrates optimum thermal hydraulic performance. Experimental results show that the heat exchange capacity of the three‐ and four‐pass microchannel condenser are very close which is 36.5% greater than that of the two‐pass microchannel condenser. Meanwhile, the three‐pass condenser refrigerant flow resistance is 8.3% lower than that of the four‐pass condenser. Therefore, the microchannel condenser with three passes demonstrates the best thermal hydraulic performance.

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Section: Introductionmentioning

confidence: 99%

Design and performance optimization of microchannel condensers for electric vehicles

Liu

et al. 2021

Int J Energy Res

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“…A similar investigation was conducted by Djamal et al [6] but only for various louver angles (22 • , 25.5 • , and 29 • ). Amirnordin et al [7] conducted 3D numerical simulations to study an effect of the fin geometry on the pressure drop and heat transfer characteristics. The investigations were carried out for the Reynolds number from 200 to 1000 based on the louver pitch.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kowalczyk,

Łęcki,

Romaniak

et al. 2021

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The results of experimental investigations of heat transfer and a friction factor in an air channel of the minichannel heat exchanger are presented. The main aim of the analysis was to examine an influence of geometrical parameters of the fin shape with two geometries on heat transfer and flow characteristics of the air channel. The test rig was designed to monitor the parameters of the airflow during cooling by the minichannel heat exchanger. The analysis was conducted with the airflow in the range of 1-5 m/s. The temperature of the evaporation in a refrigeration system was set at 288.15 K. The energy balance of the refrigeration system was carried out. A numerical model describes the airflow through a part of the heat exchanger. Numerical simulations were validated with the experimental data. Numerical methods were used to evaluate the performance of the system and possibilities to improve the fin geometry. The characteristics of the friction factor (a measure of the pressure loss in the airflow) and the Colburn j-factor (heat transfer performance) were calculated. For the maximal velocity of the airflow, the Colburn factor was equal to 0.048 and the evaporator capacity equaled 1914 W.

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“…Moreover, louvered fins are often used in automotive application because of their continuous fins design that channel air flow better to reduce the resistance of air flow. All of these above mentioned advantages are making it important to have a compact and lightweight heat exchanger [2,3,4].…”

Section: Introductionmentioning

confidence: 99%

“…In this study, analysis of different louver angles at constant louver pitch and fin pitch are performed using ANSYS Fluent. Results of other parameters such as different louver pitch and fin pitch had been published in different paper [2]. This study intends to determine the effects of louver angle on the performance of louvered fin heat exchangers numerically by using two types of Reynolds number definition; based on louver pitch and fin pitch.…”

Section: Introductionmentioning

confidence: 99%

Effects of Geometrical Parameters to the Performance of Louvered Fin Heat Exchangers

Didane

Woon

Seri

et al. 2015

AMM

Self Cite

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Abstract. Numerical study using ANSYS Fluent is conducted to investigate the effects of louver angle on pressure drop and heat transfer of a heat exchanger. Flow simulations are conducted on 3D modeling of multi stacks louvered fins at three different parameters of louver angles which are 22.0º, 25.5º and 29.0º with Reynolds number ranging from 200 to 1000. These Reynolds numbers are based on louver pitch and fin pitch. The flow temperature is set at 300K which is the room temperature, while temperature of louver fin is set at 400K. The results show that Reynolds number based on fin pitch 2.02 mm and louver angle of 22.0º generate higher performance of heat exchanger compared to louver pitch of 1.40 mm and the other louver angles. Therefore, configuration of Reynolds number based on fin pitch 2.02 mm and louver angle 22.0º is preferred to be adopted in the design process of heat exchanger.

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Pressure Drop and Heat Transfer Characteristics of Louvered Fin Heat Exchangers

Cited by 4 publications

References 8 publications

Design and performance optimization of microchannel condensers for electric vehicles

Design and performance optimization of microchannel condensers for electric vehicles

Archives of Thermodynamics

Effects of Geometrical Parameters to the Performance of Louvered Fin Heat Exchangers

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