Numerical modeling and passive thermal control of external lighting systems for Space Station FreedomConsideration is given to three generic families of luminaries with lamp power ranging from 11 to 150 watts. A concept of an equivalent radiation node boundary temperature was used to impose worst hot and cold environments, and transient finite difference models were developed to study the effects of geometry and optical properties of thermal control coatings. Minimum and maximum transient temperatures were computed at the critical location during 90 minute orbit and were compared with allowable limits. Results show that with the proper choice of optical properties, the luminaries can be passively controlled to within acceptable limits.
Document ID
19930062581
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Buck, Gregory A. (Thermotech Consultants Scottsdale, AZ, United States)
Li, Weiming (NASA Headquarters Washington, DC United States)
Tong, Timothy W. (Arizona State Univ. Tempe, United States)