Hybrid Modeling Method for the Complex Radiative Cooling Network in the Chinese Space Station

Yuan, Man; Li, Yunze; Sun, Yunna

doi:10.1061/jaeeez.aseng-4850

Cited by 3 publications

(5 citation statements)

References 24 publications

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“…where ρ is the Earth average solar albedo with a value of 0.35; S is the solar constant with a value of 1353 W/m 2 ; ε r E i is the infrared emissivity of the surface element E i coating [23][24][25][26][27][28].…”

Section: Earth Infrared Radiation External Heat Flow: Collision Methodsmentioning

confidence: 99%

“…where α er E i is the solar absorptance of the surface element E i coating [23][24][25][26][27][28].…”

Section: Earth Albedo Radiation External Heat Flow: Collision Methodsmentioning

confidence: 99%

“…where q i r,A denotes the density of the Earth infrared direct radiation heat flow to the surface element E i ; α r E i , the infrared absorbance of the spacecraft surface element E i , is equal to the coating infrared emissivity [23][24][25][26][27][28].…”

Section: Earth Infrared Radiation External Heat Flow: Pathlength Meth...mentioning

confidence: 99%

“…, with k being the number of reflections [23][24][25][26][27][28]. In summary, the total external heat flow density of the Earth infrared radiation absorbed by the surface element E i is…”

Section: Earth Infrared Radiation External Heat Flow: Pathlength Meth...mentioning

confidence: 99%

“…where q i er,A denotes the density of direct Earth albedo radiation heat flow to the surface element E i ; α er E i is the solar absorptance of spacecraft surface element E i ; θ se is the angle between the direction vector of the sun's rays and the outer normal vector of rays emitted by surface element E i hitting the Earth surface intersection [23][24][25][26][27][28].…”

Section: Earth Albedo Radiation External Heat Flow: Path Length Metho...mentioning

confidence: 99%

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An Innovative External Heat Flow Expansion Formula for Efficient Uncertainty Analysis in Spacecraft Earth Radiation Heat Flow Calculations

Hua

et al. 2023

Aerospace

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Thermal uncertainty analysis of spacecraft is an important method to avoid overdesign and underdesign problems. In the context of uncertainty analysis, thermal models representing multiple operating conditions must be invoked repeatedly, leading to substantial computational costs. The ray tracing calculation of Earth infrared and albedo radiation heat flux is an important reason for the slow calculation speed. As the rays emitted during external heat flux calculations under different operating conditions are independent and unconnected, the rays produced across various conditions are effectively wasted. In this study, the external heat flow equation is thoroughly expanded and the derived factors are clustered and analyzed to develop a novel formula for calculating external heat flow. When this formula is employed to compute the uncertain external heat flux, only one condition necessitates ray tracing, while the remaining conditions utilize simple matrix operations in place of complex ray tracing. Within the aforementioned procedure, certain matrices demonstrate sparse characteristics. The optimization calculations for these matrices can, therefore, benefit from the application of sparse matrix optimization algorithms. Using a spacecraft as an example, the uncertain external heat flux calculation outcomes of the new and traditional formulas are compared and assessed. The findings reveal that the new formula is highly suitable for estimating uncertain Earth radiation heat flow, with a marked improvement in efficiency. The accuracy is essentially equivalent to that of the traditional formula and the calculation precision can be dynamically adjusted to meet user requirements. The methodology can be further generalized to assess the uncertainties associated with radiative external heat fluxes for other celestial bodies within the solar system. This offers a valuable theoretical framework for addressing the uncertainties in the thermal design of deep space exploration vehicles.

show abstract

Section: Earth Infrared Radiation External Heat Flow: Collision Methodsmentioning

confidence: 99%

“…where α er E i is the solar absorptance of the surface element E i coating [23][24][25][26][27][28].…”

Section: Earth Albedo Radiation External Heat Flow: Collision Methodsmentioning

confidence: 99%

Section: Earth Infrared Radiation External Heat Flow: Pathlength Meth...mentioning

confidence: 99%

“…, with k being the number of reflections [23][24][25][26][27][28]. In summary, the total external heat flow density of the Earth infrared radiation absorbed by the surface element E i is…”

Section: Earth Infrared Radiation External Heat Flow: Pathlength Meth...mentioning

confidence: 99%

Section: Earth Albedo Radiation External Heat Flow: Path Length Metho...mentioning

confidence: 99%

See 3 more Smart Citations

An Innovative External Heat Flow Expansion Formula for Efficient Uncertainty Analysis in Spacecraft Earth Radiation Heat Flow Calculations

Hua

et al. 2023

Aerospace

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show abstract

Heat dissipation capacity prediction and cooling adjustment using digital twin technologies for a typical space station cabin

Yuan,

Li,

Sun

2024

J Therm Anal Calorim

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Cooling process analysis using the energy-flow-diagram method for the complex heat dissipation network with a typical space station cabin

Yuan

Sun

2023

Applied Thermal Engineering

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Hybrid Modeling Method for the Complex Radiative Cooling Network in the Chinese Space Station

Cited by 3 publications

References 24 publications

An Innovative External Heat Flow Expansion Formula for Efficient Uncertainty Analysis in Spacecraft Earth Radiation Heat Flow Calculations

An Innovative External Heat Flow Expansion Formula for Efficient Uncertainty Analysis in Spacecraft Earth Radiation Heat Flow Calculations

Heat dissipation capacity prediction and cooling adjustment using digital twin technologies for a typical space station cabin

Cooling process analysis using the energy-flow-diagram method for the complex heat dissipation network with a typical space station cabin

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