Numerical study on cooling of high-power laser diode arrays using slot jet array impingement

Zeng Deng; Jun Shen; Wei Dai; Ke Li; Wenchi Gong; Xueqiang Dong; Gaofei Chen; Maoqiong Gong

doi:10.1016/j.applthermaleng.2019.114061

Numerical study on cooling of high-power laser diode arrays using slot jet array impingement

Zeng Deng, Jun Shen^*, Wei Dai, Ke Li, Wenchi Gong, Xueqiang Dong, Gaofei Chen, Maoqiong Gong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Thermal design shows significant effects on energy conversion efficiency, lifespan and beam quality of high-power laser diode arrays (HPLDAs). In this study, a slot jet array heat sink (SJAHS) is designed to improve the cooling performance of HPLDAs, and numerical simulations were conducted to optimize the flow and heat transfer in the heat sink. Flow passages inside the heat sink ensured that the coolant is allocated to every jet uniformly. The jet geometry is optimized to enhance the heat transfer. When the working fluid is assumed as water at 293 K inlet temperature and at a flowrate of 800 mL/min, the heat sink is capable of removing 150 W heat over an area of 15 mm² with a maximum temperature increase of 52.75 K from the coolant inlet to emitters. It means that the emitter-to-coolant thermal resistance is 0.35 K/W without considering the interface thermal resistance. The corresponding pressure drop is 361 kPa. Compared with the existing microchannel heat sink, the numerical results implied that this new heat sink possesses a better cooling performance.

Original language	English
Article number	114061
Journal	Applied Thermal Engineering
Volume	160
DOIs	https://doi.org/10.1016/j.applthermaleng.2019.114061
Publication status	Published - Sept 2019
Externally published	Yes

Keywords

High-power laser diode array
Numerical simulation
Slot jet array
Thermal design

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10.1016/j.applthermaleng.2019.114061

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title = "Numerical study on cooling of high-power laser diode arrays using slot jet array impingement",

abstract = "Thermal design shows significant effects on energy conversion efficiency, lifespan and beam quality of high-power laser diode arrays (HPLDAs). In this study, a slot jet array heat sink (SJAHS) is designed to improve the cooling performance of HPLDAs, and numerical simulations were conducted to optimize the flow and heat transfer in the heat sink. Flow passages inside the heat sink ensured that the coolant is allocated to every jet uniformly. The jet geometry is optimized to enhance the heat transfer. When the working fluid is assumed as water at 293 K inlet temperature and at a flowrate of 800 mL/min, the heat sink is capable of removing 150 W heat over an area of 15 mm2 with a maximum temperature increase of 52.75 K from the coolant inlet to emitters. It means that the emitter-to-coolant thermal resistance is 0.35 K/W without considering the interface thermal resistance. The corresponding pressure drop is 361 kPa. Compared with the existing microchannel heat sink, the numerical results implied that this new heat sink possesses a better cooling performance.",

keywords = "High-power laser diode array, Numerical simulation, Slot jet array, Thermal design",

author = "Zeng Deng and Jun Shen and Wei Dai and Ke Li and Wenchi Gong and Xueqiang Dong and Gaofei Chen and Maoqiong Gong",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = sep,

doi = "10.1016/j.applthermaleng.2019.114061",

language = "English",

volume = "160",

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issn = "1359-4311",

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T1 - Numerical study on cooling of high-power laser diode arrays using slot jet array impingement

AU - Deng, Zeng

AU - Shen, Jun

AU - Dai, Wei

AU - Li, Ke

AU - Gong, Wenchi

AU - Dong, Xueqiang

AU - Chen, Gaofei

AU - Gong, Maoqiong

PY - 2019/9

Y1 - 2019/9

N2 - Thermal design shows significant effects on energy conversion efficiency, lifespan and beam quality of high-power laser diode arrays (HPLDAs). In this study, a slot jet array heat sink (SJAHS) is designed to improve the cooling performance of HPLDAs, and numerical simulations were conducted to optimize the flow and heat transfer in the heat sink. Flow passages inside the heat sink ensured that the coolant is allocated to every jet uniformly. The jet geometry is optimized to enhance the heat transfer. When the working fluid is assumed as water at 293 K inlet temperature and at a flowrate of 800 mL/min, the heat sink is capable of removing 150 W heat over an area of 15 mm2 with a maximum temperature increase of 52.75 K from the coolant inlet to emitters. It means that the emitter-to-coolant thermal resistance is 0.35 K/W without considering the interface thermal resistance. The corresponding pressure drop is 361 kPa. Compared with the existing microchannel heat sink, the numerical results implied that this new heat sink possesses a better cooling performance.

AB - Thermal design shows significant effects on energy conversion efficiency, lifespan and beam quality of high-power laser diode arrays (HPLDAs). In this study, a slot jet array heat sink (SJAHS) is designed to improve the cooling performance of HPLDAs, and numerical simulations were conducted to optimize the flow and heat transfer in the heat sink. Flow passages inside the heat sink ensured that the coolant is allocated to every jet uniformly. The jet geometry is optimized to enhance the heat transfer. When the working fluid is assumed as water at 293 K inlet temperature and at a flowrate of 800 mL/min, the heat sink is capable of removing 150 W heat over an area of 15 mm2 with a maximum temperature increase of 52.75 K from the coolant inlet to emitters. It means that the emitter-to-coolant thermal resistance is 0.35 K/W without considering the interface thermal resistance. The corresponding pressure drop is 361 kPa. Compared with the existing microchannel heat sink, the numerical results implied that this new heat sink possesses a better cooling performance.

KW - High-power laser diode array

KW - Numerical simulation

KW - Slot jet array

KW - Thermal design

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VL - 160

JO - Applied Thermal Engineering

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ER -

Numerical study on cooling of high-power laser diode arrays using slot jet array impingement

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Keywords

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