Advantages of Spray Cooling for a Diode Laser Module

Huddle, J.J.; Chow, L. C.; Lei, Shu-Ye; Rini, Daniel P.; Marcos, A.; Chung, Te Yuan; Lindauer, Steven J.; Bass, Michael; Delfyett, Peter J.

doi:10.4271/2000-01-3623

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…The solid-state laser generates the high heat flux waste heat from various laser components ranging 100W/cm² to 500W/cm² over the large surface areas on the order of 100cm². The already severe burden is increased by very tight temperature control requirements for its efficiency and lifetime requirement [Huddle et. al., 2000;Ramalingam, et.…”

Section: Introductionmentioning

confidence: 99%

Advanced Hybrid Cooling Loop Technology For High Performance Thermal Management

Park

Vallury

Perez

2006

4th International Energy Conversion Engineering Conference and Exhibit (IECEC)

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Advanced hybrid cooling loop technology has been developed for the high performance cooling systems for such as U.S. Army next generation vehicles, "Future Combat System (FCS)" and Directed Energy Weapons (DEW), high power Solid State Laser Systems. The hybrid cooling loop combines the active liquid pumping with the passive capillary liquid management in the sintered wick structure of the evaporator and its liquid/vapor separation. The prototype hybrid cooling loop using planar evaporator design was tested to be capable of managing up to 4kW cooling load which is equivalent to the heat flux up to 30W/cm² over the cooling surface area of 135cm² (=7.6cm×17.8cm). From the temperature results, however, much higher heat flux conditions are very likely to be achieved. The measured boiling thermal resistance was as low as 0.16°C-cm²/W and remained relatively constant during heat load variations except cold start conditions. This paper discusses the operating principle of the hybrid cooling loop with single evaporator and presents the test results under various power cycles. The results represent major improvements over the state-of-art heat pipes, loop heat pipes and two-phase spray and jet impingement cooling devices in terms of heat flux, cooling surface area and design simplicity.

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Section: Introductionmentioning

confidence: 99%

Advanced Hybrid Cooling Loop Technology For High Performance Thermal Management

Park

Vallury

Perez

2006

4th International Energy Conversion Engineering Conference and Exhibit (IECEC)

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“…Utilization of spray cooling also makes possible smaller, lighter thermal subsystems because a much lower coolant flow rate is needed. A comparison of the typical coolant flow rates for a 2 cm 2 diode array is given in Figure 5.1 (Huddle, 2000). To keep the emitters at a desired temperature, the pressure in the spray cooling chamber can be adjusted or with a wide variety of fluids other than water to be used.…”

Section: )mentioning

confidence: 99%

Cryo Power and Heat Transfer

Chow¹,

Bass²,

Du³

et al. 2004

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Effects of Liquid Heat Dissipation on Heat Transfer Coefficient in Spray Cooling

Lei

2005

Heat Transfer, Part B

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The effects of the heat flux and liquid temperatures during spray cooling heat transfer were experimentally studied for non-boiling water spray cooling. The experiments show that the heat flux strongly affects the heat transfer coefficient, especially for high temperature sprays or low heat fluxes. A key effect is the heat dissipation from the liquid to the environment. The heat dissipation increases with the spray inlet temperature or the heat flux. To explain the strong dependence of the heat transfer on the heat dissipation in single phase, a spray cooling heat transfer model was suggested which includes the heat dissipation. Experimental measurements of the radial spray droplet temperature profile showed the complex nature of the heat dissipation.

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Advantages of Spray Cooling for a Diode Laser Module

Cited by 3 publications

References 2 publications

Advanced Hybrid Cooling Loop Technology For High Performance Thermal Management

Advanced Hybrid Cooling Loop Technology For High Performance Thermal Management

Cryo Power and Heat Transfer

Effects of Liquid Heat Dissipation on Heat Transfer Coefficient in Spray Cooling

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