A method has been developed to evaluate the thermal distortion of the Space Station Solar Dynamic Concentrator and the effects of thermal distortion on concentrator optical performance. The analytical method includes generating temperature distributions with TRASYS and SINDA models, interfacing the SINDA results with the SINDA-NASTRAN Interface Program (SNIP), calculating thermal distortion with a NASTRAN/PATRAN finite element model, and providing flux distribution maps within the receiver with the ray-tracing OFFSET program. Temperature distributions, thermally induced slope errors, and flux distributions maps within the receiver are discussed. Results during a typical orbit indicate that temperatures of the hexagonal panels and triangular facets range between -18 Cel and 99 Cel (-1 to 210 deg J), facet rotations are less than 0.2 mrad, and a change in facet radius due to thermal flattening is less than 5 percent. The predicted power loss with thermal distortion effects was less than 0.3 percent. The thermal distortion of the Solar Dynamic concentrator has negligible effect on the flux distribution within the receiver cavity.
Thermal distortion analysis of the space station solar dynamic concentrator
Thermische Verformungsanalyse des dynamischen Solarkonzentrators einer Weltraumstation
IECEC, 23rd Intersociety Energy Conversion Engineering Conf., ASME ; 3 , Aug ; 341-349
1988
9 Seiten, 12 Bilder, 1 Tabelle, 10 Quellen
Aufsatz (Konferenz)
Englisch
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