Thermal and optical consequences of the introduction of baffles into compound parabolic concentrating solar energy collector cavities

Journal Article · Tue Aug 01 00:00:00 EDT 1995 · Solar Energy

DOI:https://doi.org/10.1016/0038-092X(95)00039-T· OSTI ID:219847

Eames, P C; Norton, B ^[1]

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1. Univ. of Ulster, Newtownabbey (United Kingdom)

A theoretical and experimental investigation into the modifications in optical and thermal performance resulting from the introduction of a baffle into the cavity of a compound parabolic concentrating solar energy collector has been performed. Results are presented in the form of velocity vector diagrams and isothermal plots. A comparison is made of the collector loss coefficient and Hottel-Whiller-Bliss graphs are produced for cavities with and without a baffle present. The introduction of a baffle reduces internal convection thereby reducing heat losses. The associated reduction in optical efficiency is small. 14 refs., 10 figs., 2 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 219847
• Journal Information: Solar Energy, Vol. 55, Issue 2; Other Information: PBD: Aug 1995
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
SOLAR COLLECTORS
THERMAL EFFICIENCY
BAFFLES
CONCENTRATING COLLECTORS
PARABOLIC COLLECTORS
ISOTHERMS