Thermoelectric Cooler Array
Peltier-Effect Solid-State Cooling Modules
Peltier-effect solid-state cooling modules use bismuth telluride junctions mounted on alumina substrates to pump heat away from radiation-sensitive electronics and sensors. Operating without moving parts, multi-stage modules generate zero vibration and achieve temperature differentials up to 70 K. In the lunar vacuum, the absence of ambient convection requires a direct thermal path to radiators or heat pipes to reject hot-side heat. Furthermore, lunar radiation gradually degrades bismuth telluride elements over time, while low coefficients of performance between 0.5 and 1.0 limit operational capacity to small, localized thermal loads under 50 W.
Thermoelectric (Peltier) coolers for localized spot cooling of sensitive electronics
Purpose
Provide vibration-free solid-state cooling for radiation-sensitive electronics and sensors
Context
Child of L2-TCS-HPMP in the Active Thermal Control System
Principles
- ▸Peltier effect pumps heat from cold to hot side when current flows through BiTe junctions
- ▸Multi-stage TEC cascades achieve larger temperature differentials (up to 70K)
- ▸No moving parts means unlimited cycle life and zero vibration
- ▸COP is low (~0.5-1.0) limiting TEC to small heat loads (<50W)
Typical implementations
- ▸Marlow Industries space-rated TECs (heritage on multiple spacecraft)
- ▸Laird Thermal Systems multi-stage Peltier modules
- ▸Custom Thermoelectric BiTe modules for cryocooler pre-staging
Lunar considerations
- ▸Radiation damage to BiTe thermoelectric materials degrades performance over time
- ▸Hot-side rejection in vacuum requires good thermal path to radiator or heat pipe
- ▸Power consumption limits applicability to small localized cooling loads
- ▸Ideal for spot-cooling individual rad-hard processor packages
Specifications
Functional
| primary function | Thermoelectric (Peltier) coolers for localized spot cooling of sensitive electronics |
Physical
| materials | Bismuth Telluride (Bi2Te3) thermoelectric elements, Alumina substrates, Indium solder |
Interfaces
Provides
- Localized cooling for rad-hard processor packages
Requires
- DC power for TEC operation (~10-50W per module)
Cite this entry
Lunar Ark Codex. "Thermoelectric Cooler Array" (L3-TCS-HPMP-TEC). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-TCS-HPMP-TEC
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.