Design and Development of Loop Heat Pipes

Mena, F.; Supper, W.; Puillet, Christian

doi:10.4271/2000-01-2315

Cited by 8 publications

(5 citation statements)

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“…The constrained space of such applications requires to design specific LHPs. Various models have been developed for the LHP characterization [7,23,[29][30][31][32]. The steady state models are useful to size new-designed LHPs and to predict LHP performance for various fixed external conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The LHP was developed and tested in 1972 in the former Soviet Union [1]. The development of LHPs was a response to the challenge of the increasing needs of electronic systems, and with the specific demand of aerospace technology, which requires high operational reliability and robustness [2][3][4][5][6][7][8][9][10]. The two-phase loops offer many advantages over heat pipes [1,11] in terms of operation against gravity, maximum heat transport capability, smoothwalled flexible transport lines, and fast diode action.…”

Section: Introductionmentioning

confidence: 99%

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Parametric analysis of loop heat pipe operation: a literature review

Launay

Sartre

Bonjour

2007

International Journal of Thermal Sciences

234

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric analysis of loop heat pipe operation: a literature review

Launay

Sartre

Bonjour

2007

International Journal of Thermal Sciences

234

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“…Concerning the development of the LHP transient modeling, only a limited amount of publications exist in the open literature. Mena et al [10] have developed a transient model based on the energy and mass balance equations in a monodimensional hydraulic network. The mass flow rate was assumed to be constant at each instant in the whole loop and the pressure energy was neglected.…”

mentioning

confidence: 99%

“…The mass flow rate was assumed to be constant at each instant in the whole loop and the pressure energy was neglected. By comparing the calculation and experimental results, Mena et al [10] concluded that this modeling approach did not allow one to perform very accurate thermohydraulic analysis at the LHP level during the transient changes. Wrenn et al [11] have used the NASA-standard thermohydraulic analyzer, SINDA/FLUINT, which solves the conservation equations of mass, momentum, and energy.…”

mentioning

confidence: 99%

Transient Modeling of Loop Heat Pipes for the Oscillating Behavior Study

Launay

Platel

Dutour

et al. 2007

Journal of Thermophysics and Heat Transfer

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“…The purpose of this study was to develop a low-cost high-performance small LHP with a plastic wick for space and terrestrial applications. So far, there have been several reports on LHPs with plastic wicks [4][5][6][7][8]. However, detailed discussion of the properties and the advantages and disadvantages of plastic porous wicks have not been well discussed.…”

mentioning

confidence: 99%

Development of an Experimental Small Loop Heat Pipe with Polytetrafluoroethylene Wicks

Nagano

Fukuyoshi

Ogawa

et al. 2011

Journal of Thermophysics and Heat Transfer

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This paper reports the development of an experimental small loop heat pipe with polytetrafluoroethylene (PTFE) wicks. Three kinds of PTFE porous materials were fabricated, and their wick properties were evaluated. It was clarified that the peak pore radii of the PTFE porous materials ranged from 0.8 to 2:2 m, and their porosities ranged from 27 to 50%. A small loop heat pipe with PTFE wicks was designed using these properties, and an experimental small loop heat pipe, for which the wick in an evaporator is exchangeable, was fabricated. The experimental loop was tested with 1.2 and 2:2 m PTFE wicks under atmospheric conditions. The test result with a 2:2 m PTFE wick showed a high operating temperature, possibly due to vapor leak from the evaporator grooves to the compensation chamber. The test results with the 1:2 m PTFE wick showed a lower operating temperature, lower thermal resistance, and stable operation of the loop heat pipe. Nomenclature D I Wick = inner diameter of wick, m D O Wick = outer diameter of wick, m K = permeability, m 2 k Eff = effective thermal conductivity, W m 1 K 1 k L = thermal conductivity of liquid, W m 1 K 1 k Wick = thermal conductivity of wick material, W m 1 K 1 L Wick = active length of wick, m _ m Wick = mass flow rate of fluid through wick, kg s 1 P Cap = capillary limit, Pa _ Q HL = heat leak through wick, W _ Q Load = heat load to evaporator, W R E C = thermal resistance between evaporator and condenser, K=W r Pore = pore radius of wick, m T SatCore = saturation temperature of wick core, K T SatEvap = saturation temperature of evaporator, K T Cond = average temperature of condenser, K T Evap = average temperature of evaporator, K P Cond = pressure drop of condenser, Pa P Grv = pressure drop of grooves of wick, Pa P LL = pressure drop of liquid line, Pa P Tot = total pressure drop in LHP, Pa P VL = pressure drop of vapor line, Pa P Wick = pressure drop across wick, Pa P G = gravity head, Pa " = porosity, % = contact angle, deg. L = viscosity of liquid, Pa s L = density of liquid, kg m 3 = surface tension, N m 1

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Design and Development of Loop Heat Pipes

Cited by 8 publications

References 0 publications

Parametric analysis of loop heat pipe operation: a literature review

Parametric analysis of loop heat pipe operation: a literature review

Transient Modeling of Loop Heat Pipes for the Oscillating Behavior Study

Development of an Experimental Small Loop Heat Pipe with Polytetrafluoroethylene Wicks

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