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

Dietrich, M.; Euler, Andreas; Thummes, G.

doi:10.1016/j.cryogenics.2013.11.004

Cited by 19 publications

(14 citation statements)

References 11 publications

(16 reference statements)

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“…Thermal‐expansion‐based thermal regulators have been made using different materials or their composites, such as copper/Teflon, [ 243 ] stainless steel/beryllium, [ 45 ] thermoplastics, [ 11,244 ] and silica/germanium. [ 245,246 ] Further, they have mainly been used for cryogenics [ 234,235,243 ] and outer space applications.…”

Section: Mechanical Thermal Control Devicesmentioning

confidence: 99%

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Fluidic and Mechanical Thermal Control Devices

Klinar

Swoboda

Rojo

et al. 2020

Adv Elect Materials

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In recent years, intensive studies on thermal control devices have been conducted for the thermal management of electronics and computers as well as for applications in energy conversion, chemistry, sensors, buildings, and outer space. Conventional cooling or heating techniques realized using traditional thermal resistors and capacitors cannot meet the thermal requirements of advanced systems. Therefore, new thermal control devices are being investigated to satisfy these requirements. These devices include thermal diodes, thermal switches, thermal regulators, and thermal transistors, all of which manage heat in a manner analogous to how electronic devices and circuits control electricity. To design or apply these novel devices as well as thermal control principles, this paper presents a systematic and comprehensive review of the state‐of‐the‐art of fluidic and mechanical thermal control devices that have already been implemented in various applications for different size scales and temperature ranges. Operation principles, working parameters, and limitations are discussed and the most important features for a particular device are identified.

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Section: Mechanical Thermal Control Devicesmentioning

confidence: 99%

“…[ 245,246 ] Further, they have mainly been used for cryogenics [ 234,235,243 ] and outer space applications. [ 11,244,247 ] One interesting high‐temperature application (up to 700 K) is thermal computing. [ 9,246 ]…”

Section: Mechanical Thermal Control Devicesmentioning

confidence: 99%

Fluidic and Mechanical Thermal Control Devices

Klinar

Swoboda

Rojo

et al. 2020

Adv Elect Materials

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“…The passively operated thermal heat switch was developed in a previous project where it was able to demonstrate that the design principle works [4]. The switch makes use of the very high coefficient of thermal expansion (CTE) of the thermoplastic Ultra-High Molecular Weight Polyethylene (UHMW-PE).…”

Section: Introductionmentioning

confidence: 99%

“…∆T is stable or even Long term measurement of the temperature difference across the switch of Ref [4]. at a heat load of 1 W. Cold flange temperature T CF = 100 K.…”

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confidence: 99%

A lightweight thermal heat switch for redundant cryocooling on satellites

2017

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A previously designed cryogenic thermal heat switch for space applications has been optimized for low mass, high structural stability, and reliability. The heat switch makes use of the large linear thermal expansion coefficient (CTE) of the thermoplastic UHMW-PE for actuation. A structure model, which includes the temperature dependent properties of the actuator, is derived to be able to predict the contact pressure between the switch parts. This pressure was used in a thermal model in order to predict the switch performance under different heat loads and operating temperatures. The two models were used to optimize the mass and stability of the switch. Its reliability was proven by cyclic actuation of the switch and by shaker tests.

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“…The pressure is usually varied inside the cryostat by including an adsorption pump in the gas reservoir. The heat flow in these systems is, however, highly limited [5].…”

mentioning

confidence: 99%

Implementation of a Cryogenic Facility for Space Debris Analysis

et al. 2021

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This paper has resulted from a continued study of spacecraft material degradation and space debris formation. The design and implementation of a thermal vacuum cycling cryogenic facility for the evaluation of space debris generation at a low Earth orbit (LEO) is presented. The facility used for spacecraft external material evaluation is described, and some of the obtained results are presented. The infrastructure was developed in the framework of a study for the European Space Agency (ESA). The main purpose of the cryogenic facility is to simulate the LEO spacecraft environment, namely thermal cycling and vacuum ultraviolet (VUV) irradiation to simulate the spacecraft material degradation and the generation of space debris. In a previous work, some results under LEO test conditions showed the effectiveness of the cryogenic facility for material evaluation, namely: the degradation of satellite paints with a change in their thermo-optical properties, leading to the emission of cover flakes; the degradation of the pressure-sensitive adhesive (PSA) used to glue Velcro’s to the spacecraft, and to glue multilayer insulation (MLI) to the spacecraft’s. The paint flakes generated are space debris. Hence, in a scenario of space missions where a spacecraft has lost the thermal shielding capability, the failure of PSA tape and the loss of Velcro properties may contribute to the release of the full MLI blanket, contributing to the generation of space debris that presents a growing threat to space missions in the main Earth orbits.

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

Cited by 19 publications

References 11 publications

Fluidic and Mechanical Thermal Control Devices

Fluidic and Mechanical Thermal Control Devices

A lightweight thermal heat switch for redundant cryocooling on satellites

Implementation of a Cryogenic Facility for Space Debris Analysis

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