Methods for reducing heat losses from flat plate solar collectors: Phase II. Final report, February 1, 1976--August 31, 1977

Technical Report · Wed Mar 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6722389· OSTI ID:6722389

Hollands, K G.T.; Raithby, G D; Unny, T E

Improvements to flat plate solar collectors for heating and cooling of buildings were investigated through two parallel studies. The first study, which deals with the free convective heat loss from V-corrugated absorber plate to a plane glass cover, has shown that, for the same average spacing, the free convective heat loss is greater for a V-corrugated absorber plate than for a plane absorber plate. However, provided the average spacing is large enough, the amount of increase is slight. The second study, which deals with the free convective heat loss in a honeycomb solar collector in which the honeycomb consists of a set of horizontal partitions, or slits, has shown that provided the solar collector is tilted to near vertical, such a honeycomb gives equivalent or superior free convective loss suppression than does a square-celled honeycomb having the same amount of material. Correlation equations for the free convective heat loss are given for both studies.

• Research Organization: Waterloo Univ., Ontario (Canada)
• OSTI ID: 6722389
• Report Number(s): COO-2597-4
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
141000* -- Solar Collectors & Concentrators
CONVECTION
ENERGY LOSSES
ENERGY TRANSFER
FLAT PLATE COLLECTORS
HEAT LOSSES
HEAT TRANSFER
HEATING SYSTEMS
HONEYCOMB STRUCTURES
MECHANICAL STRUCTURES
MODIFICATIONS
NATURAL CONVECTION
ORIENTATION
SOLAR ABSORBERS
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR HEATING SYSTEMS