Radiometric measurement of temperature distributions in solar cavity receivers
An engineering tool incorporating a scanning infrared radiometer, an image digitizer, a microcomputer, and the software to drive the system was developed to allow remote mapping of the temperature distribution in solar cavity receivers. Using enclosure analysis, the infrared image processing program extracts the irradiance map from the radiosity map of the cavity to yield an emissive power map. Using the calibration curve of the radiometer and the emissivity of the surface of the cavity, the emissive power map is transformed into a temperature map. The system was tested by comparing its calculated temperatures to temperatures measured by thermocouples at several locations on the surfaces of heated model cavity receivers. The average relative error for the cavities ranged from 4.6%--34.9%, with the relative error on the base usually less than half that on the wall. Some work was also carried out to compensate the detected radiosity field for the system transfer function error of the scanner system. 8 refs., 57 figs., 3 tabs.
- Research Organization:
- Clarkson Univ., Potsdam, NY (USA). Dept. of Mechanical Engineering; United Technologies Research Center, East Hartford, CT (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6303348
- Report Number(s):
- SAND-89-7026; ON: DE89011467
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140700* -- Solar Thermal Power Systems
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
CHEMICAL ANALYSIS
COMPUTER ARCHITECTURE
COMPUTERS
CSP
Concentrating Solar Power
DIGITAL COMPUTERS
MAPPING
MEASURING INSTRUMENTS
MICROCOMPUTERS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTORS
RADIOMETERS
RADIOMETRIC ANALYSIS
SCALE MODELS
SOLAR RECEIVERS
STRUCTURAL MODELS
TEMPERATURE DISTRIBUTION
THERMOCOUPLES
140700* -- Solar Thermal Power Systems
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CALIBRATION
CHEMICAL ANALYSIS
COMPUTER ARCHITECTURE
COMPUTERS
CSP
Concentrating Solar Power
DIGITAL COMPUTERS
MAPPING
MEASURING INSTRUMENTS
MICROCOMPUTERS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATION DETECTORS
RADIOMETERS
RADIOMETRIC ANALYSIS
SCALE MODELS
SOLAR RECEIVERS
STRUCTURAL MODELS
TEMPERATURE DISTRIBUTION
THERMOCOUPLES