Natural convection in composite wall collectors with porous absorber
Journal Article
·
· Solar Energy (Journal of Solar Energy Science and Engineering); (USA)
- Ecole Polytechnique, Montreal, Quebec (Canada)
Steady natural convection heat transfer has been studied in a modified Trombe wall solar collector with a porous medium used as an absorber. The boundary conditions were: two isothermal walls at different temperatures, two horizontal bounding adiabatic walls and either uniform or nonuniform heat generating porous layer with orifices. The aspect ratio A was from 5 to 10. The influence of orifice opening and position as well as the nonuniform heat generation within the porous medium have been studied in detail with the Darcy number varying from 10{sup {minus}8} to 10{sup {minus}2}. The results are presented in terms of practical parameters ({Eta}, {Eta}{sub max}, q) as a function of Ra, Da and other nondimensional geometrical parameters. The isotherms and stream lines within the cavity are also produced. The overall results indicate that Da and geometrical parameters are the most important parameters affecting system performance.
- OSTI ID:
- 5684539
- Journal Information:
- Solar Energy (Journal of Solar Energy Science and Engineering); (USA), Journal Name: Solar Energy (Journal of Solar Energy Science and Engineering); (USA) Vol. 45:6; ISSN SRENA; ISSN 0038-092X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
BOUNDARY CONDITIONS
COMPUTER CODES
CONVECTION
ENERGY SYSTEMS
ENERGY TRANSFER
EQUATIONS
EQUIPMENT
FLOW MODELS
FLUIDS
HEAT TRANSFER
HEAT TRANSFER FLUIDS
HEATING SYSTEMS
MASS TRANSFER
MATHEMATICAL MODELS
MODIFICATIONS
NATURAL CONVECTION
PASSIVE SOLAR HEATING SYSTEMS
PERFORMANCE
POROSITY
S CODES
SOLAR ABSORBERS
SOLAR COLLECTORS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
TEMPERATURE DISTRIBUTION
TROMBE WALLS
WALLS
141000* -- Solar Collectors & Concentrators
BOUNDARY CONDITIONS
COMPUTER CODES
CONVECTION
ENERGY SYSTEMS
ENERGY TRANSFER
EQUATIONS
EQUIPMENT
FLOW MODELS
FLUIDS
HEAT TRANSFER
HEAT TRANSFER FLUIDS
HEATING SYSTEMS
MASS TRANSFER
MATHEMATICAL MODELS
MODIFICATIONS
NATURAL CONVECTION
PASSIVE SOLAR HEATING SYSTEMS
PERFORMANCE
POROSITY
S CODES
SOLAR ABSORBERS
SOLAR COLLECTORS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
TEMPERATURE DISTRIBUTION
TROMBE WALLS
WALLS