Design of condensing radiators for spacecraft thermal management

Izenson, Michael G.; Crowley, Christopher J.

doi:10.2514/6.1992-2864

Cited by 6 publications

(6 citation statements)

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“…The effect of bends was ignored. The pressure drop in the condenser was assessed by three different two-phase models [1]. A detailed discussion can be found in [1] and seems unnecessary to reiterate here.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The pressure drop in the condenser was assessed by three different two-phase models [1]. A detailed discussion can be found in [1] and seems unnecessary to reiterate here. Saturation pressure-temperature data were modeled by curve fitting into a power function.…”

Section: Model Descriptionmentioning

confidence: 99%

“…Continuous change of heat input at these points, prove the consistency of the model. Figure 18 compares the simulated pressure drop in the condenser using three different well-known two-phase models [1].…”

Section: Operating Temperature and Working Fluidmentioning

confidence: 99%

“…Figure18. Calculation of two-phase pressure drop in the condenser using three different two-phase models[1].…”

mentioning

confidence: 99%

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A hybrid CFD-mathematical model for simulation of a MEMS loop heat pipe for electronics cooling applications

Ghajar

Darabi

Crews

2004

J. Micromech. Microeng.

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A hybrid CFD-mathematical (HyCoM) model was developed to predict the performance of a micro loop heat pipe (MLHP) as a function of input heat rate. A micro loop heat pipe is a passive two-phase heat transport device, consisting of microevaporator, microcondenser, microcompensation chamber (CC) and liquid and vapor lines. A CFD model was incorporated into a loop solver code to identify heat leak to the CC. Two-phase pressure drop in the condenser was calculated by several two phase correlations and results were compared (Izenson and Crowley 1992 AIAA Paper A92-47847). Capillary tube correlations (Blevins 1984 Applied Fluid Dynamics Handbook (New York: Van Nostrand-Reinhold)) were used for pressure drop calculations in fluid lines. Effects of working fluid and change in geometry were studied. For a heat transport distance of 10 mm, the base model MLHP was 50 mm long, 16 mm wide and 1 mm thick. In the base model, widths of the grooves, liquid and vapor lines, evaporator and condenser were 55 µm, 200 µm, 750 µm, 2 mm and 4 mm, respectively.

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Section: Model Descriptionmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Operating Temperature and Working Fluidmentioning

confidence: 99%

“…Figure18. Calculation of two-phase pressure drop in the condenser using three different two-phase models[1].…”

mentioning

confidence: 99%

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A hybrid CFD-mathematical model for simulation of a MEMS loop heat pipe for electronics cooling applications

Ghajar

Darabi

Crews

2004

J. Micromech. Microeng.

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“…The pressure drop in the condenser was treated as before [1], using the methodology of [17] or [11,12], and recently [3]. The pressure drop in the evaporator was calculated as follows.…”

Section: Model Descriptionmentioning

confidence: 99%

Numerical modeling of evaporator surface temperature of a micro loop heat pipe at steady-state condition

Ghajar¹,

Darabi²

2005

J. Micromech. Microeng.

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Numerical investigations have been performed to simulate a novel micro loop heat pipe (MLHP) under steady-state conditions. For most electronics, the maximum working temperature is an important design factor; therefore an accurate prediction of this temperature is crucial. The model predicts the steady-state temperature distribution at the surface of the heat source as a function of applied heat loads. This code builds upon a previous code developed by the authors (Ghajar et al 2005 J. Micromech. Microeng. 15 313–21), and utilizes a hybridizing of an alternating direction implicit (ADI) computational fluid dynamics (CFD) code and relevant thermodynamic equations. Using this simulation tool, the minimum required compensation chamber cavity has been calculated and checked for various operating temperature ranges. Additionally, the design of the MLHP has been improved by evaluating the effects of the geometric feature variations. Considering the fabrication constraints, some of the optimized geometry dimensions were found to be a groove wall thickness of 2 µm, a groove width of 7 µm, a wicking structure length of 500 µm and a vapor line width of 2 mm.

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Numerical analysis of heat and mass transfer in the capillary structure of a loop heat pipe

Kaya

Goldak

2006

International Journal of Heat and Mass Transfer

116

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Design of condensing radiators for spacecraft thermal management

Cited by 6 publications

References 0 publications

A hybrid CFD-mathematical model for simulation of a MEMS loop heat pipe for electronics cooling applications

A hybrid CFD-mathematical model for simulation of a MEMS loop heat pipe for electronics cooling applications

Numerical modeling of evaporator surface temperature of a micro loop heat pipe at steady-state condition

Numerical analysis of heat and mass transfer in the capillary structure of a loop heat pipe

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