Test Results from a Parabolic-Cylindrical Solar Collector
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
This report presents and analyzes results from the testing of receiver tubes using a focusing parabolic-cylindrical reflector, north-south axis, which was fully tracking. Various receiver tube design differences have been compared experimentally and analytically at temperatures up to 600°F (315°c). Included are results for an asymmetric receiver tube design, and data showing the influence of an evacuated glass vacuum-jacket. The asymmetric design consists of an insulating strip on the surface of the glass jacket closest to the sun. Also tested have been receiver tubes coated with Pyromark,* black chrome on a dull nickel-plated tube, black chrome on a bright nickel-plated tube, and the Honeywell AMA coating on a bright nickel-plated tube. The Pyromark is a nonselective coating. The test results show significant improvements through the use of a low-order vacuum, the use of selective coatings, and the use of an asymmetric design for the high-emittance coating. The analytical results are within the range of test results and the model will be a valuable tool for further studies. The testing was conducted at the test and evaluation facility in Albuquerque, New Mexico.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1638575
- Report Number(s):
- SAND-75-5333; 389470
- Country of Publication:
- United States
- Language:
- English
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