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Slope error measurement tool for solar parabolic trough collectors : preprint / J. Kathleen Stynes, Benjamin Ihas.
- Format:
- Book
- Author/Creator:
- Stynes, J. Kathleen.
- Series:
- Conference paper (National Renewable Energy Laboratory (U.S.)) ; 5500-54636.
- Conference paper NREL/CP ; 5500-54636
- Language:
- English
- Subjects (All):
- Solar collectors--Evaluation.
- Solar collectors.
- Parabolic troughs--Research.
- Parabolic troughs.
- Specular reflectance--Measurement.
- Specular reflectance.
- Reflective materials--Optical properties.
- Reflective materials.
- Genre:
- technical reports.
- Technical reports
- Technical reports.
- Physical Description:
- 1 online resource (8 pages) : color illustrations.
- Place of Publication:
- [Golden, Colo.] : National Renewable Energy Laboratory, 2012.
- Summary:
- The National Renewable Energy Laboratory (NREL) has developed an optical measurement tool for parabolic solar collectors that measures the combined errors due to absorber misalignment and reflector slope error. The combined absorber alignment and reflector slope errors are measured using a digital camera to photograph the reflected image of the absorber in the collector. Previous work using the image of the reflection of the absorber finds the reflector slope errors from the reflection of the absorber and an independent measurement of the absorber location. The accuracy of the reflector slope error measurement is thus dependent on the accuracy of the absorber location measurement. By measuring the combined reflector-absorber errors, the uncertainty in the absorber location measurement is eliminated. The related performance merit, the intercept factor, depends on the combined effects of the absorber alignment and reflector slope errors. Measuring the combined effect provides a simpler measurement and a more accurate input to the intercept factor estimate. The minimal equipment and setup required for this measurement technique make it ideal for field measurements.
- Notes:
- Title from PDF title screen (viewed July 27, 2012).
- "April 2012."
- "To be presented at the 2012 World Renewable Energy Forum, Denver, Colorado, May 13-17, 2012."
- Includes bibliographical references (page 8).
- OCLC:
- 801977694
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