Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis

J. Derek; A.N. Jinoop; C.P. Paul; S.L. Nidhin; N.G. Rasu; K.S. Bindra

doi:10.1007/978-981-13-6416-7_38

Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis

J. Derek, A.N. Jinoop, C.P. Paul, S.L. Nidhin, N.G. Rasu, K.S. Bindra

SCEDT Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

Micro-channel heat exchangers (MCHEs) are compact and robust heat exchangers with high surface area per unit volume facilitating closer temperature of approach. MCHE is conventionally fabricated using photochemical etching followed by diffusion bonding (PCED). Though PCED allows various flow path designs for improved heat exchange, it is not deployed for MCHE with cross sections other than semi-circular. Laser additive manufacturing (LAM) can overcome this limitation. The present study is focused on thermo-hydraulic simulation of LAM built MCHE with various cross sections. A 3D steady-state computational fluid dynamics (CFD)-based analysis is performed using CFD code ANSYS CFX to estimate the temperature, pressure drop and velocity distribution across the length of channel and variation of friction factor with Reynolds number. The working fluid is supercritical helium and material of construction of MCHE is Inconel 617 (IN 617). The temperature-dependent thermo-physical properties of helium and IN 617 are taken into account for the above simulation. To validate the simulation output, the results for conventionally fabricated PCHE are compared with that of previously published results and are found to be within 5%. The study of MCHE with cross sections other than semi-circular (i.e. square and circular) is also done using the same CFD code. From this numerical analysis, it is found that the heat transfer is maximum in square geometry while pressure drop, velocity across the channel and friction factor are the least for square geometry.

Original language	English
Title of host publication	Advances in Fluid and Thermal Engineering
Editors	P Saha, P Subbarao, B Sikarwar
Publisher	Springer
ISBN (Electronic)	9789811364167
ISBN (Print)	9789811364150
DOIs	https://doi.org/10.1007/978-981-13-6416-7_38
Publication status	Published - 24 Apr 2019
Event	Future Learning Aspects for Mechanical Engineering - Noida, Delhi NCR, India Duration: 3 Oct 2018 → 5 Oct 2018

Publication series

Name	Lecture Notes in Mechanical Engineering

Conference

Conference	Future Learning Aspects for Mechanical Engineering
Abbreviated title	FLAME2018
Country/Territory	India
City	Delhi NCR
Period	3/10/18 → 5/10/18

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10.1007/978-981-13-6416-7_38

Cite this

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title = "Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis",

abstract = "Micro-channel heat exchangers (MCHEs) are compact and robust heat exchangers with high surface area per unit volume facilitating closer temperature of approach. MCHE is conventionally fabricated using photochemical etching followed by diffusion bonding (PCED). Though PCED allows various flow path designs for improved heat exchange, it is not deployed for MCHE with cross sections other than semi-circular. Laser additive manufacturing (LAM) can overcome this limitation. The present study is focused on thermo-hydraulic simulation of LAM built MCHE with various cross sections. A 3D steady-state computational fluid dynamics (CFD)-based analysis is performed using CFD code ANSYS CFX to estimate the temperature, pressure drop and velocity distribution across the length of channel and variation of friction factor with Reynolds number. The working fluid is supercritical helium and material of construction of MCHE is Inconel 617 (IN 617). The temperature-dependent thermo-physical properties of helium and IN 617 are taken into account for the above simulation. To validate the simulation output, the results for conventionally fabricated PCHE are compared with that of previously published results and are found to be within 5%. The study of MCHE with cross sections other than semi-circular (i.e. square and circular) is also done using the same CFD code. From this numerical analysis, it is found that the heat transfer is maximum in square geometry while pressure drop, velocity across the channel and friction factor are the least for square geometry.",

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Derek, J, Jinoop, AN, Paul, CP, Nidhin, SL, Rasu, NG & Bindra, KS 2019, Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis. in P Saha, P Subbarao & B Sikarwar (eds), Advances in Fluid and Thermal Engineering. Lecture Notes in Mechanical Engineering, Springer, Future Learning Aspects for Mechanical Engineering, Delhi NCR, India, 3/10/18. https://doi.org/10.1007/978-981-13-6416-7_38

TY - CHAP

T1 - Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis

AU - Derek, J.

AU - Jinoop, A.N.

AU - Paul, C.P.

AU - Nidhin, S.L.

AU - Rasu, N.G.

AU - Bindra, K.S.

PY - 2019/4/24

Y1 - 2019/4/24

N2 - Micro-channel heat exchangers (MCHEs) are compact and robust heat exchangers with high surface area per unit volume facilitating closer temperature of approach. MCHE is conventionally fabricated using photochemical etching followed by diffusion bonding (PCED). Though PCED allows various flow path designs for improved heat exchange, it is not deployed for MCHE with cross sections other than semi-circular. Laser additive manufacturing (LAM) can overcome this limitation. The present study is focused on thermo-hydraulic simulation of LAM built MCHE with various cross sections. A 3D steady-state computational fluid dynamics (CFD)-based analysis is performed using CFD code ANSYS CFX to estimate the temperature, pressure drop and velocity distribution across the length of channel and variation of friction factor with Reynolds number. The working fluid is supercritical helium and material of construction of MCHE is Inconel 617 (IN 617). The temperature-dependent thermo-physical properties of helium and IN 617 are taken into account for the above simulation. To validate the simulation output, the results for conventionally fabricated PCHE are compared with that of previously published results and are found to be within 5%. The study of MCHE with cross sections other than semi-circular (i.e. square and circular) is also done using the same CFD code. From this numerical analysis, it is found that the heat transfer is maximum in square geometry while pressure drop, velocity across the channel and friction factor are the least for square geometry.

AB - Micro-channel heat exchangers (MCHEs) are compact and robust heat exchangers with high surface area per unit volume facilitating closer temperature of approach. MCHE is conventionally fabricated using photochemical etching followed by diffusion bonding (PCED). Though PCED allows various flow path designs for improved heat exchange, it is not deployed for MCHE with cross sections other than semi-circular. Laser additive manufacturing (LAM) can overcome this limitation. The present study is focused on thermo-hydraulic simulation of LAM built MCHE with various cross sections. A 3D steady-state computational fluid dynamics (CFD)-based analysis is performed using CFD code ANSYS CFX to estimate the temperature, pressure drop and velocity distribution across the length of channel and variation of friction factor with Reynolds number. The working fluid is supercritical helium and material of construction of MCHE is Inconel 617 (IN 617). The temperature-dependent thermo-physical properties of helium and IN 617 are taken into account for the above simulation. To validate the simulation output, the results for conventionally fabricated PCHE are compared with that of previously published results and are found to be within 5%. The study of MCHE with cross sections other than semi-circular (i.e. square and circular) is also done using the same CFD code. From this numerical analysis, it is found that the heat transfer is maximum in square geometry while pressure drop, velocity across the channel and friction factor are the least for square geometry.

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M3 - Chapter

SN - 9789811364150

T3 - Lecture Notes in Mechanical Engineering

BT - Advances in Fluid and Thermal Engineering

A2 - Saha, P

A2 - Subbarao, P

A2 - Sikarwar, B

PB - Springer

T2 - Future Learning Aspects for Mechanical Engineering

Y2 - 3 October 2018 through 5 October 2018

ER -

Investigating the effect of geometry on micro-channel heat exchangers using CFD analysis

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