Thermal Subsystem Peer Review 7-9-3

Objective: To maintain all components of the space craft within their specific temperature range

Method Model Empty Spacecraft for entire orbit: Assumptions: ISS Orbit Thermal Properties StructureResults: Heat gain from Radiation Heat reflected within satellite

Inside-the-Box Modeling Used to monitor temperatures at specific locations during orbit. This will allow for us to troubleshoot during the mission when components are not acting properly. Thermistors Sensor is glued to surface of interest, where it creates a specific resistance in response to temperature measurement. Approximately, 50 thermistors will be required at $3-$6 each.

Inside-the-Box Modeling Isolation Some sensitive electrical components will need to be isolated from the radiative/conductive environment. We can do this thru MLI blankets. Heat Reservoirs Components which are exposed to alternating hot and cold modes, will need to be in contact with heat reservoirs which will both gather and supply heat when needed. Temperature Control

Radiator: The radiator rejects excess heat into space. Placement: The best position for the radiator is the earth facing side of the satellite. This should not affect the cameras, and is standard practice. Inside-the-Box Modeling Heat Expulsion

What’s Next? Thermal Model Upon reporting specifications of materials and equipment, as well as their modes of operation, our model can be expanded to increase accuracy. Placement of Thermistors will result from the reporting of these specifications, so we can identify points of interest for temperature measurement.

References gore.ocean.washington.edu/.../ Students/Crone/therm.htm index.shtml