Spacecraft Radiator Sizing Calculator

Thermal Architecture: Size dedicated spacecraft radiator rejection area ($A_{rad}$) for internal payload dissipation and equivalent space sink temperature ($T_{sink}$).

Payload Dissipation & Environment

Internal Heat Load $Q_{int}$ (W):

Radiator Operating Temp $T_{rad}$ (°C):

Equivalent Sink Temp $T_{sink}$ (K):

Radiator Thermal Emittance $\epsilon$:

Fin Thermal Efficiency $\eta_{fin}$:

Design Thermal Margin (%):

Panel Areal Density ($\text{kg/m}^2$):

Radiator Sizing & Mass Summary

Required Area

-- m²

Specific Heat Rejection

-- W/m²

Design Load (w/ Margin)

-- W

Radiator Panel Mass

-- kg

Thermal Radiative Details

• Radiator Temperature: -- K

• Blackbody Emission (at $T_{rad}$): -- W/m²

• Back-Radiation from Sink ($T_{sink}$): -- W/m²

• Effective Net Emission Factor: --

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Spacecraft Radiator Sizing Calculator

Payload Dissipation & Environment

Radiator Sizing & Mass Summary

Thermal Radiative Details

Frequently Asked Questions