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Optimization of dish solar collectors with and without secondary concentrators
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jaffe, L. D. |
| Copyright Year | 1982 |
| Description | Methods for optimizing parabolic dish solar collectors and the consequent effects of various optical, thermal, mechanical, and cost variables are examined. The most important performance optimization is adjusting the receiver aperture to maximize collector efficiency. Other parameters that can be adjusted to optimize efficiency include focal length, and, if a heat engine is used, the receiver temperature. The efficiency maxima associated with focal length and receiver temperature are relatively broad; it may, accordingly, be desirable to design somewhat away from the maxima. Performance optimization is sensitive to the slope and specularity errors of the concentrator. Other optical and thermal variables affecting optimization are the reflectance and blocking factor of the concentrator, the absorptance and losses of the receiver, and, if a heat engine is used, the shape of the engine efficiency versus temperature curve. Performance may sometimes be improved by use of an additional optical element (a secondary concentrator) or a receiver window if the errors of the primary concentrator are large or the receiver temperature is high. |
| File Size | 4315411 |
| Page Count | 129 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19830010953 |
| Archival Resource Key | ark:/13960/t9964ch1d |
| Language | English |
| Publisher Date | 1982-05-15 |
| Access Restriction | Open |
| Subject Keyword | Energy Production And Conversion Concentrators Heat Pumps Efficiency Apertures Solar Collectors Maxima Parabolic Reflectors Optimization Foci Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
