Multilayer insulation considerations for large propellant tanks

Nast, T. C.; Frank, D.J.; Feller, J. R.

doi:10.1016/j.cryogenics.2014.02.014

Cited by 20 publications

(12 citation statements)

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“…In Germany, Kunzel and co-workers have examined numerous external insulation build wall facilities with relatively extreme temperature variations and wind-driven rain on multi-story floors (Künzel, Künzel, & Sedlbauer, 2006). In wide Dewar tanks, multilayer insulation has been investigated by (Nast, Frank, & Feller, 2014). A simulation modelling was developed to test the cryogenic fluid boil-off and the thermal conductivity of multilayer insulation.…”

Section: State Of the Artmentioning

confidence: 99%

“…For NASA, test results were used for the planning of large propellant tanks (Nast et al, 2014). The hygrothermal and thermal efficacy of the twenty-year old external wall insulation device was evaluated using laboratory experiments and control, parametric simulations and analysis by Stazi and co-workers (Stazi, Di Perna, & Munafò, 2009).…”

Section: State Of the Artmentioning

confidence: 99%

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Selection of insulation materials with PSI-CRITIC based CoCoSo method

Ulutaş

Balo

Sua³

et al. 2021

rdlc

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The performance effect of construction on energy conservation substantially depends upon application of correct materials and energy saving methodologies. A sizable financial impact is accomplished through insulated walls. The criteria explaining the present wall insulating material options may have different values. Furthermore, they may alter in different aspects, i.e. higher values of certain criteria show a preferable status, while for others they denote an inferior status. In this framework, a variant of compromise is needed, which can be situated through multi-criteria assessment methodologies. To diminish the effect of different methodologies on computational results, few diverse techniques can be considered, with descriptions of the mean predicted values. Thus, drawbacks of certain multi-criteria assessment techniques could be compensated through others. A hybrid methodology through the combination of individual techniques will be accurate if there is a relationship between the values determined through diverse methodologies. In this study, the most efficient insulation material used at external walls is selected by using PSI-CRITIC based CoCoSo Method. The analytical results are important both from financial and engineering point of views as the applied methodology is commercially viable and practically implementable. Precise and up-to-date material properties are derived from the leading companies in the sector.

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Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Selection of insulation materials with PSI-CRITIC based CoCoSo method

Ulutaş

Balo

Sua³

et al. 2021

rdlc

View full text Add to dashboard Cite

show abstract

“…The second analytical approach is the Lockheed Martin Flat Plate equation which is developed with flat plate calorimeter for Silk−net spacers for liquid nitrogen (LN 2 ) and assumes negligible gas conduction under vacuum levels that is less than 10 −5 torr. Thus it includes only conduction and radiation heat loads and the empirical form of the total heat load in the Lockheed Martin Flat Plate equation can be expressed as [27,28]:…”

Section: Lockheed Martian Flat Plate Equationmentioning

confidence: 99%

“…where all constants follows their usual meaning as explained in Eq.4 [27,28] and the value of all constants are mentioned in Table1.…”

Section: Lockheed Martian Flat Plate Equationmentioning

confidence: 99%

Improvement in the performance of multilayer insulation technique and impact in the rare physics search experiments

Singh,

Chaubey

et al. 2021

Preprint

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Providing thermal insulation to systems at very low temperature from surroundings, involves blocking the transport of thermal energy−regular or enhanced, taking place through radiative, conductive and convective processes. For instance, the enhancement of radiative heat transport that takes place by infra−red or far infra−red light at low temperature is due to diffractive propagation. The wavelength of light in this part of the spectrum usually lie in the range of mm to cms. Hence it can get bent across an obstacle while propagating forward. Apart from radiative, the convective and conductive processes also get affected due to appearance of non−linearities in the modes of lattice vibrations and anomalies in material transport due to the appearance of vorticity and turbulence in the intervening media. The Multilayer insulation (MLI) technique has offered a robust thermal protective mechanism to provide proper insulation to the cold walls of the cryostats from the heat of the surroundings (basically the radiation heat load). This work is focussed on the estimation of performance and efficiency of the MLI technique as well as exploration of its versatile applicability. Three different spacer materials such as Dacron, Glass−tissue, and Silk−net with radiation shields are selected for the intervening medium in the present study. This article explores the thermal performance of MLI system by changing the physical parameters (emissivity and residual gas pressure), varying the geometry of the radiation shields (perforation styles of radiation shields) and by analyzing the effect of arrangement of radiation shields on the conduction heat load. The predictions of analytical models−Modified Lockheed equation, Lockheed Martin Flat Plate equation and McIntosh's approach are compared for the performance of MLI systems and for the applicable choice in future experiments. This analysis is concluded by studying the possibility of using MLI technique in the health sector by reducing the evaporation rate of liquid Oxygen (LO 2 ) during pandemic situations e.g., in COVID−19.

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“…[4,19,20] MLI achieves a very high thermal insulation performance, and its apparent thermal conductivity can be as low as 10 À6 -10 À5 W (m K) À1 . [21][22][23] The disadvantage of MLI is that it is susceptible to vacuum changes. During the long-term storage, as the The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/ente.202000591.…”

Section: Introductionmentioning

confidence: 99%

A Novel Composite Insulation System of Hollow Glass Microspheres and Multilayer Insulation with Self‐Evaporating Vapor Cooled Shield for Liquid Hydrogen Storage

Yang

et al. 2020

Energy Tech

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The efficient storage method of hydrogen energy is a major concern in its practical application. Compared with other hydrogen storage methods, liquid hydrogen (LH2) storage has the advantages of high energy storage density and low storage pressure. However, the temperature of LH2 is significantly lower than room temperature, and heat leakage causes it to evaporate continuously. Thus, an efficient thermal insulation technology is a key to LH2 storage. Herein, based on the traditional multilayer insulation (MLI), a novel insulation system combining hollow glass microspheres (HGMs) that is not sensitive to vacuum with self‐evaporating vapor cooled shield (VCS) that can recover hydrogen cold‐energy is introduced and analyzed. Based on the layer‐by‐layer method, a thermodynamic calculation model is established, and related experimental verification is completed. The results show that the heat leakage of the proposed insulation system is decreased by 45% under high vacuum (10−3 Pa) and 81% under low vacuum (1 Pa) compared with the traditional MLI. The influences of the VCS position, LH2 storage pressure, hot boundary temperature, and vacuum on the thermal insulation performance of the composite thermal insulation system are also analyzed.

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Multilayer insulation considerations for large propellant tanks

Cited by 20 publications

References 1 publication

Selection of insulation materials with PSI-CRITIC based CoCoSo method

Selection of insulation materials with PSI-CRITIC based CoCoSo method

Improvement in the performance of multilayer insulation technique and impact in the rare physics search experiments

A Novel Composite Insulation System of Hollow Glass Microspheres and Multilayer Insulation with Self‐Evaporating Vapor Cooled Shield for Liquid Hydrogen Storage

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