Thermal

Thermal simulator results for two representative orbits; no thermal control strategies implemented

Thermal simulator results for two representative orbits; no thermal control strategies implemented

Spacecraft in Low Earth Orbit (LEO) operate in an environment that produces temperature extremes from as low as -100 ºC to as high as 100 ºC. At these extremes, critical spacecraft components such as batteries and avionics boards cease to function. The job of the thermal team is to predict how ELFIN’s components will thermally respond to the flight environment and to develop methods for preventing the spacecraft from exceeding temperature restrictions.

Some of the engineering problems that the thermal team tackles include:

  • Accurate thermal modeling and simulation is vital in developing thermal control strategies. The team is currently developing a Matlab-based high-fidelity thermal simulator that inputs orbit parameters and spacecraft properties and outputs temperature profiles of each component in the spacecraft. Some simulation results can be found in the figures presented on this page.
  • Using the knowledge gained from our thermal simulator, the team can make sandbox-style design changes to the thermal properties of the spacecraft to see their effect on the resulting temperature distribution. This is equivalent to finding out how adding thermally protective covers or structures change the thermal characteristics of the spacecraft without actually building prototypes. This dynamic functionality of the thermal simulator is crucial in streamlining the decision making process.
  • Validating the simulator results with actual satellite temperature profiles measured in nanosatellites that have flown in the past.
  • Thermal-vacuum testing of spacecraft components, also to validate simulation results and thermal control strategies.
A 3D Printed model of the Fluxgate Magnetometer covered with high-reflectance, low-emittance thermal tape

A 3D Printed model of the Fluxgate Magnetometer covered with high-reflectance, low-emittance thermal tape