Parabolic solar collector with glass pipe and black fluid

Journal Article · Thu May 01 00:00:00 EDT 1986 · J. Sol. Energy Eng.; (United States)

DOI:https://doi.org/10.1115/1.3268079· OSTI ID:5472081

Chang, M J; Roux, J A

A glass pipe and an absorbing black fluid were combined with a parabolic solar reflector into a solar collector. Thermal efficiencies for three different types of receivers with a parabolic trough solar reflector were compared: (1) single glass pipe with black fluid, (2) concentric annulus glass pipes with black fluid, and (3) black-painted copper tubing. The single glass pipe with a black working fluid performed best experimentally. The single glass pipe with a black fluid was better than the black painted copper tube by an average of 5 percent absolute system efficiency or 14 percent on a total energy absorbed basis. Mass flow rate and wind speed were analytically found to be significant. The black fluid solar collector was found to have an optimum system efficiency for a blackening agent concentration of 15 ml per gallon of water. A numerical lumped heat capacity model was used to compare with the experimental data.

• Research Organization: Univ. of Mississippi, University, MS 38677
• OSTI ID: 5472081
• Journal Information: J. Sol. Energy Eng.; (United States), Vol. 108:2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
PARABOLIC COLLECTORS
BLACK LIQUIDS
PARABOLIC TROUGH REFLECTORS
PIPES
SOLAR RECEIVERS
COMPARATIVE EVALUATIONS
THERMAL EFFICIENCY
BLACK COATINGS
COPPER
FLOW RATE
GLASS
MASS TRANSFER
MATHEMATICAL MODELS
QUANTITY RATIO
SPECIFIC HEAT
VELOCITY
WIND
COATINGS
CONCENTRATING COLLECTORS
EFFICIENCY
ELEMENTS
EQUIPMENT
FLUIDS
LIQUIDS
METALS
PARABOLIC REFLECTORS
PHYSICAL PROPERTIES
SOLAR COLLECTORS
SOLAR CONCENTRATORS
SOLAR EQUIPMENT
SOLAR REFLECTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
141000* - Solar Collectors & Concentrators