Thermal Control.

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Presentation transcript:

Thermal Control

Requirements Define high level diagram of thermal control Identify major components required Define system and hardware requirements sufficiently to allow future thermal control architecture definition and hardware trade studies

Basic Hardware Required Passive Thermal Control Multilayer Insulation (MLI) Surface Finishes Active Thermal Control Panel (strip) heaters Closed switch controlled by PRTs (Platinum Resistance Thermometers) monitoring optimal temperature for spacecraft components Used to heat hydrazine thrusters before initial burns Structures | Propulsion | GN&C | Telecommunications | Carla

Thermal Control Calculated Temperature of Equipment and Spacecraft PRT Monitor Equipment Temperature Activate Heat for Thrusters Assume Passive Thermal Control Panel Heating ON/OFF Structures | Propulsion | GN&C | Telecommunications | Carla

Plume Protection Trade Study Material Basic Information Pros Cons Molybdenum Alloys Used in turbine blades Meets temperature requirements Unsure of space worthiness PICA Used as heat shield for entry into Earth/Mars atmospheres Light weight, used in previous space missions Unsure of cost

Plume Protection Trade Study Cont. Molybdenum PICA Density Okay Good Space worthiness Unknown Temperature Appropriate

Basic Material Properties Molybdenum Alloy (TZM) Density of 10.22 g/cm3 Melting temperature 2610 degrees C Can retain integrity until at least 1300 degrees C PICA (ablative material) (Phenolic Impregnated Carbon Ablators) Used on heat shield of Stardust Sample Return Capsule Designed by Lockheed Martin Density of 0.224- 0.321 g/cm3 Withstand at least 2700 degrees C WILL UPDATE SLIDE WITH JUST ONE APPROPRIATE MATERIAL

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