Portable instrumentation for solar absorptance and emittance measurements

Conference · Tue Jan 01 00:00:00 EST 1980

OSTI ID:5198051

Pettit, R B; Mahoney, A R

Two portable instruments, one designed for solar absorptance and the other for emittance measurements, have been evaluated. A Solar Spectrum Reflectometer was used for solar absorptance measurements while a model AE Emissometer was used to measure the emittance for an 80/sup 0/C blackbody. Both instruments are manufactured by Devices and Services Co., Dallas, TX. The Solar Spectrum Reflectometer uses four different detector/filter combinations to match an air mass two solar spectral distribution. The solar absorptance values measured for a variety of solar coatings were determined to an accuracy of +-0.02 absorptance units. For second-surface solar mirrors, the instrument underestimates the hemispherical solar reflectance when the reflecting surface is more than 0.2 mm away from the measurement port. The emissometer consists of a heated measurement head and separate display unit. The accuracy of this instrument is better than +-0.03 emittance units for black chrome solar coatings and better than +-0.06 emittance units for all coatings studied.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5198051
• Report Number(s): SAND-80-1541C; CONF-800955-3
• Resource Relation: Conference: Line-focus solar thermal energy technology development conference, Albuquerque, NM, USA, 9 Sep 1980
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ABSORPTIVITY
MEASURING INSTRUMENTS
COATINGS
EMISSIVITY
SOLAR ABSORBERS
SOLAR REFLECTORS
SPECTRAL REFLECTANCE
ACCURACY
BLACK CHROME
GLAZING MATERIALS
MIRRORS
OPTICAL FILTERS
OPTICAL PROPERTIES
PERFORMANCE
BLACK COATINGS
EQUIPMENT
FILTERS
MATERIALS
PHYSICAL PROPERTIES
SOLAR CONCENTRATORS
SOLAR EQUIPMENT
SURFACE PROPERTIES
141000* - Solar Collectors & Concentrators