Thermal analysis of a flat-plate boiling collector having sub-cooled inlet and saturated exit states

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Solar Energy; (USA)

DOI:https://doi.org/10.1016/0038-092X(89)90139-4· OSTI ID:5196828

El-Assy, A Y; Clark, J A ^[1]

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1. Univ. of Michigan, Ann Arbor (USA)

The analysis of the thermal performance of a boiling flat-plate solar collector is presented. A generalized heat removal factor and a new formulation for the overall thermal loss coefficient are developed. It is demonstrated that the conventional heat removal factor for non-boiling collectors is a limiting case of a more generalized result. The new formulation for the overall thermal loss coefficient is shown to be a function of the fractional non-boiling length of the flow channel. The influence of the inlet sub-cooling is evaluated and the operating limits of solar flat-plate collectors are determined. A comparison is made between the thermal model for boiling collectors having sub-cooled inlet states and experimental results. Favorable agreement is obtained.

• OSTI ID: 5196828
• Journal Information: Solar Energy; (USA), Vol. 42:2; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
FLAT PLATE COLLECTORS
THERMAL ANALYSIS
EXPERIMENTAL DATA
HEAT LOSSES
PERFORMANCE
THEORETICAL DATA
THERMAL EFFICIENCY
THERMODYNAMIC MODEL
DATA
EFFICIENCY
ENERGY LOSSES
EQUIPMENT
INFORMATION
LOSSES
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE MODELS
SOLAR COLLECTORS
SOLAR EQUIPMENT
STATISTICAL MODELS
141000* - Solar Collectors & Concentrators