Development of a Cryogenic Heat Pipe

Prenger, F. C.; Stewart, Walter F.; Runyan, J. E.

doi:10.1007/978-1-4615-2522-6_209

Cited by 10 publications

(5 citation statements)

References 1 publication

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“…Heat pipes: Larger c with higher forward-mode conductances at smaller DT can be achieved using the liquid-vapor phase change in heat pipe thermal diodes. Heat pipe diodes are a relatively mature technology, and they have been developed for diverse applications ranging from temperature control of spacecraft sensors and electrical devices, 172 thermal energy storage, 173 nighttime radiative cooling, 174 and temperature control of buildings for reduced energy consumption. 175 In a large-scale infrastructure application, gravity-driven heat pipe thermal diodes known as thermosiphons were installed on the Trans-Alaska Pipeline System 176 and the Qinghai-Tibet Railway 177 to prevent permafrost melting.…”

Section: -13mentioning

confidence: 99%

Thermal diodes, regulators, and switches: Physical mechanisms and potential applications

Wehmeyer

Yabuki

Monachon

et al. 2017

Applied Physics Reviews

368

261

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Interest in new thermal diodes, regulators, and switches has been rapidly growing because these components have the potential for rich transport phenomena that cannot be achieved using traditional thermal resistors and capacitors. Each of these thermal components has a signature functionality: Thermal diodes can rectify heat currents, thermal regulators can maintain a desired temperature, and thermal switches can actively control the heat transfer. Here, we review the fundamental physical mechanisms of switchable and nonlinear heat transfer which have been harnessed to make thermal diodes, switches, and regulators. The review focuses on experimental demonstrations, mainly near room temperature, and spans the fields of heat conduction, convection, and radiation. We emphasize the changes in thermal properties across phase transitions and thermal switching using electric and magnetic fields. After surveying fundamental mechanisms, we present various nonlinear and active thermal circuits that are based on analogies with well-known electrical circuits, and analyze potential applications in solid-state refrigeration and waste heat scavenging.

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Section: -13mentioning

confidence: 99%

Thermal diodes, regulators, and switches: Physical mechanisms and potential applications

Wehmeyer

Yabuki

Monachon

et al. 2017

Applied Physics Reviews

368

261

View full text Add to dashboard Cite

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“…It should be noted that the use of bi-porous capillary-porous structures, application of which in the development of modern highly efficient heat pipes and so-called vapor chambers (VCs) is just beginning, is also very promising [153][154][155][156][157][158][159][160][161][162][163][164]. Such structures, created with simultaneous use of powders of two particle kinds, very different in size (or sometimes shape), have both small pores (about several microns) and large pores (about tens of microns).…”

Section: Heat Transfer Enhancement and Increase In Critical Heat Flux In Horizontal Layers Of Liquid Of Finite Heightmentioning

confidence: 99%

“…The small pores enable creation of a large capillary "pump," while the large pores help to reduce the resistance to the liquid flow, evacuate vapor, and provide a large area/space for phase transition. Cryogenic heat pipes stand out as a prominent heat transfer device in such low temperature gradient heat transfer without any external power [153,156]. A heat pipe consists of three basic components: container, working liquid, and wick structure.…”

Section: Heat Transfer Enhancement and Increase In Critical Heat Flux In Horizontal Layers Of Liquid Of Finite Heightmentioning

confidence: 99%

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

Павленко

Кузнецов

2021

J. Engin. Thermophys.

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The paper presents a brief analysis of current achievements and key issues in the field of heat transfer and critical heat flux enhancement during boiling of cryogenic liquids and freons under various heat release laws via micro-structuring of the heat-generating surface. A review of new experimental data on the efficiency of heat transfer and critical heat flux enhancement during pool boiling via new micro-structured capillary-porous coatings created by plasma sputtering and selective laser melting/sintering (3D printing) is presented. The results of analysis of the efficiency of heat transfer and critical heat flux during boiling on heat-generating surfaces with micro-textures of different shapes and micro-profiling created by micro-deforming cutting are presented. New results obtained during nitrogen boiling under various hydrodynamical conditions on the mechanisms of sharp increase in the rate of non-stationary cooling of plates with new structured capillary-porous or low-heat-conductivity coatings with certain parameters are discussed. New results on the degree of heat transfer enhancement during boiling of liquids on micro-structured surfaces modified by the method of micro-arc oxidation are presented.

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“…There exist various kinds of heat switches for space applications, each having their own advantages and disadvantages. Most common are heat switches of the Gas-Gap and CTE-based (CTE: linear thermal coefficient of expansion) type [2,3,4], but also some designs based on other physical effects are known [5,6]. In Gas-Gap switches the pressure of a gas in a small gap is controlled.…”

Section: Introductionmentioning

confidence: 99%

A compact thermal heat switch for cryogenic space applications operating near 100K

2014

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A thermal heat switch has been developed intended for cryogenic space applications operating around 100 K. The switch was designed to separate two pulse tube cold heads that cool a common focal plane array. Two cold heads are used for redundancy reasons, while the switch is used to reduce the thermal heat loss of the stand-by cold head, thus limiting the required input power, weight and dimensions of the cooler assembly. After initial evaluation of possible switching technologies, a construction based on the difference in the linear thermal expansion coefficients (CTE) of different materials was chosen. A simple design is proposed based on thermoplastics which have one of the highest CTE known permitting a relative large gap width in the open state. Furthermore, the switch requires no power neither during normal operation nor for switching. This enhances reliability and allows for a simple mechanical design. After a single switch was successfully built, a second double-switch configuration was designed and tested. The long term performance of the chosen thermoplastic (ultra-high molecular weight polyethylene) under cryogenic load is also analysed.

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Development of a Cryogenic Heat Pipe

Cited by 10 publications

References 1 publication

Thermal diodes, regulators, and switches: Physical mechanisms and potential applications

Thermal diodes, regulators, and switches: Physical mechanisms and potential applications

Development of Methods for Heat Transfer Enhancement During Nitrogen Boiling to Ensure Stabilization of HTS Devices

A compact thermal heat switch for cryogenic space applications operating near 100K

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