Abstract
The concept, detailed design, fabrication, and test results of a reversible thermal panel, which is a new, passive, and lightweight 100 W-class deployable radiator with an environment-adaptive function, is described. The reversible thermal panel 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, lenders, and interplanetary spacecrafts. Parametric studies were conducted with detailed simulation models, and the reversible thermal panel configuration that satisfies thermal requirements with the restraints of weight and fin efficiency variation was determined. Based on the analytical results, a reversible thermal panel engineering model was fabricated using high thermal conductivity graphite sheets in the reversible fin and a shape-memory alloy in the passive deployment/stowing actuator. Test results indicated excellent performance of the reversible thermal panel as a passive radiator from the standpoints of heat-rejection capability, specific heat rejection, and variation of the fin efficiency. The effectiveness of the reversible thermal panel as a solar absorber that can be substituted for a survival heater was also demonstrated.
| Original language | English |
|---|---|
| Pages (from-to) | 856-864 |
| Number of pages | 9 |
| Journal | Journal of Thermophysics and Heat Transfer |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2006 Oct |
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ASJC Scopus subject areas
- Mechanical Engineering
- Physical and Theoretical Chemistry
- Fluid Flow and Transfer Processes
Cite this
Simple deployable radiator with autonomous thermal control function. / Nagano, Hosei; Nagasaka, Yuji; Ohnishi, Akira.
In: Journal of Thermophysics and Heat Transfer, Vol. 20, No. 4, 10.2006, p. 856-864.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simple deployable radiator with autonomous thermal control function
AU - Nagano, Hosei
AU - Nagasaka, Yuji
AU - Ohnishi, Akira
PY - 2006/10
Y1 - 2006/10
N2 - The concept, detailed design, fabrication, and test results of a reversible thermal panel, which is a new, passive, and lightweight 100 W-class deployable radiator with an environment-adaptive function, is described. The reversible thermal panel 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, lenders, and interplanetary spacecrafts. Parametric studies were conducted with detailed simulation models, and the reversible thermal panel configuration that satisfies thermal requirements with the restraints of weight and fin efficiency variation was determined. Based on the analytical results, a reversible thermal panel engineering model was fabricated using high thermal conductivity graphite sheets in the reversible fin and a shape-memory alloy in the passive deployment/stowing actuator. Test results indicated excellent performance of the reversible thermal panel as a passive radiator from the standpoints of heat-rejection capability, specific heat rejection, and variation of the fin efficiency. The effectiveness of the reversible thermal panel as a solar absorber that can be substituted for a survival heater was also demonstrated.
AB - The concept, detailed design, fabrication, and test results of a reversible thermal panel, which is a new, passive, and lightweight 100 W-class deployable radiator with an environment-adaptive function, is described. The reversible thermal panel 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, lenders, and interplanetary spacecrafts. Parametric studies were conducted with detailed simulation models, and the reversible thermal panel configuration that satisfies thermal requirements with the restraints of weight and fin efficiency variation was determined. Based on the analytical results, a reversible thermal panel engineering model was fabricated using high thermal conductivity graphite sheets in the reversible fin and a shape-memory alloy in the passive deployment/stowing actuator. Test results indicated excellent performance of the reversible thermal panel as a passive radiator from the standpoints of heat-rejection capability, specific heat rejection, and variation of the fin efficiency. The effectiveness of the reversible thermal panel as a solar absorber that can be substituted for a survival heater was also demonstrated.
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U2 - 10.2514/1.17988
DO - 10.2514/1.17988
M3 - Article
VL - 20
SP - 856
EP - 864
JO - Journal of Thermophysics and Heat Transfer
JF - Journal of Thermophysics and Heat Transfer
SN - 0887-8722
IS - 4
ER -