A simple deployable radiator with autonomous thermal control function

Hosei Nagano, Yuji Nagasaka, Akira Ohnishi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper describes the concept, detailed design, fabrication, and test results of a Reversible Thermal Panel (RTP), which is a new, passive and lightweight 100W-class deployable radiator with an environment adaptive function. The RTP changes its function reversibly from a radiator to a solar absorber by deploying/stowing the radiator/absorber reversible fin upon changes in the heat dissipation and thermal environment, and is effective for the thermal control of high power density small satellites, landers, and interplanetary spacecrafts. Parametric studies were conducted with detailed simulation models, and the RTP configuration that satisfies thermal requirements with the restraints of weight and fin efficiency variation was determined. Based on the analytical results, an RTP engineering model was fabricated using high thermal conductive graphite sheets in the reversible fin, and a shape memory alloy in the passive deployment/stowing actuator. Test results indicated excellent performance of the RTP as a passive radiator from the standpoints of heat rejection capability, specific heat rejection, and variation of the fin efficiency. The effectiveness of the RTP as a solar absorber that can be substituted for a survival heater was also demonstrated.

Original languageEnglish
Title of host publication38th AIAA Thermophysics Conference
Publication statusPublished - 2005
Event38th AIAA Thermophysics Conference - Toronto, ON, Canada
Duration: 2005 Jun 62005 Jun 9

Other

Other38th AIAA Thermophysics Conference
CountryCanada
CityToronto, ON
Period05/6/605/6/9

Fingerprint

Radiators
radiators
fins
absorbers
rejection
spacecraft
Solar absorbers
interplanetary spacecraft
thermal environments
shape memory alloys
heaters
Hot Temperature
radiant flux density
Interplanetary spacecraft
graphite
actuators
specific heat
engineering
cooling
heat

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Nagano, H., Nagasaka, Y., & Ohnishi, A. (2005). A simple deployable radiator with autonomous thermal control function. In 38th AIAA Thermophysics Conference

A simple deployable radiator with autonomous thermal control function. / Nagano, Hosei; Nagasaka, Yuji; Ohnishi, Akira.

38th AIAA Thermophysics Conference. 2005.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nagano, H, Nagasaka, Y & Ohnishi, A 2005, A simple deployable radiator with autonomous thermal control function. in 38th AIAA Thermophysics Conference. 38th AIAA Thermophysics Conference, Toronto, ON, Canada, 05/6/6.
Nagano H, Nagasaka Y, Ohnishi A. A simple deployable radiator with autonomous thermal control function. In 38th AIAA Thermophysics Conference. 2005
Nagano, Hosei ; Nagasaka, Yuji ; Ohnishi, Akira. / A simple deployable radiator with autonomous thermal control function. 38th AIAA Thermophysics Conference. 2005.
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