An experimental study of free convection in compound parabolic concentrator (CPC) cavities

Journal Article · Mon Oct 31 23:00:00 EST 1988 · J. Sol. Energy Eng.; (United States)

DOI:https://doi.org/10.1115/1.3268270· OSTI ID:6303203

Chew, T C; Wijeysundera, N E; Tay, A O

An experimental study of the free convection heat transfer between the cylindrical absorber and the flat top of a compound parabolic concentrator (CPC) is described. Results are obtained for a range of absorber temperatures and four CPC cavity heights. For similar conditions of operating temperature, the heat transfer from a cylinder in free air is about 30 to 50 percent higher than in a CPC cavity. Two correlations for Nusselt and Grashof numbers have been obtained using the equivalent length and the cavity height as the characteristic length of the system.

• Research Organization: Dept. of Mechanical and Production Engineering, National Univ. of Singapore (SG)
• OSTI ID: 6303203
• Journal Information: J. Sol. Energy Eng.; (United States), Journal Name: J. Sol. Energy Eng.; (United States) Vol. 110:4; ISSN JSEED
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
COMPOUND PARABOLIC CONCENTRATORS
DATA
ENERGY TRANSFER
EQUIPMENT
EXPERIMENTAL DATA
HEAT TRANSFER
INFORMATION
NUMERICAL DATA
NUSSELT NUMBER
PERFORMANCE
SOLAR CONCENTRATORS
SOLAR EQUIPMENT