Copper disk pyrheliometer of high accuracy
A copper disk pyrheliometer has been designed and constructed that utilizes a new methodology to measure solar radiation. By operating the shutter of the instrument and measuring the heating and cooling rates of the sensor at the very moment when the sensor is at the same temperature, the solar radiation can be accurately determined with these rates. The method is highly accurate and is shown to be totally independent of the loss coefficient in the measurement. The pyrheliometer has been tested using a standard irradiance lamp in the laboratory. The uncertainty of the instrument is identified to be +- 0.61%. Field testing was also conducted by comparing data with that of a calibrated (Eppley) Normal Incidence Pyrheliometer. This paper spells out details of the construction and testing of the instrument; the analysis underlying the methodology was also covered in detail. Because of the high accuracy, the instrument is considered to be well suited for a bench standard for measurement of solar radiation.
- Research Organization:
- University of Florida, Mechanical Engineering Department, Thermal Radiation Laboratory, Gainesville, Florida 32611
- OSTI ID:
- 6066664
- Journal Information:
- Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 22:1; ISSN APOPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140100* -- Solar Energy-- Resources & Availability
COPPER
COST BENEFIT ANALYSIS
DESIGN
ELEMENTS
EQUIPMENT
ERRORS
FABRICATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
OPERATION
PYRHELIOMETERS
RADIATIONS
SOLAR EQUIPMENT
SOLAR FLUX
SOLAR RADIATION
STELLAR RADIATION
TELESCOPES
TRANSITION ELEMENTS