Evaporative rate model for a natural convection glazed collector/regenerator

Journal Article · Thu Feb 01 04:00:00 EST 1990 · Journal of Solar Energy Engineering; (USA)

DOI:https://doi.org/10.1115/1.2930759· OSTI ID:5792158

Nelson, D J ^[1]; Wood, B D ^[2]

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1. Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA). Dept. of Mechanical Engineering
2. Arizona State Univ., Tempe, AZ (USA). Dept. of Mechanical and Aerospace Engineering

In this paper, a numerical method has been applied to model the water evaporation rate of a glazed collector/regenerator component of an open-cycle absorption refrigeration system. This two-dimensional model calculates local heat and mass-transfer coefficients as part of the solution. The air flow in the glazed channel is driven by the combined buoyancy of both heat and mass transfer (water evaporation). Since the heat and mass-transfer coefficients each depend on both of the driving potentials determined by local conditions in the falling film, a solution of the conjugate problem is required. The resulting nonuniform air-film interface conditions cause the local heat and mass transfer to differ significantly from the uniform boundary condition case. The glazed collector/regenerator is much less sensitive to the ambient temperature and humidity than the unglazed collector. The addition of a glazing over the collector/regenerator provides a significant performance improvement and enhances solution regeneration in a windy humid climate.

• OSTI ID: 5792158
• Journal Information: Journal of Solar Energy Engineering; (USA), Journal Name: Journal of Solar Energy Engineering; (USA) Vol. 112:1; ISSN 0199-6231; ISSN JSEED
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140909* -- Solar Thermal Utilization-- Miscellaneous Solar Applications-- (1980-)
141000 -- Solar Collectors & Concentrators
ABSORPTION REFRIGERATION CYCLE
CONVECTION
COVERINGS
ENERGY TRANSFER
EQUIPMENT
EVAPORATION
GLAZING
HEAT EXCHANGERS
HEAT TRANSFER
HYDROGEN COMPOUNDS
MASS TRANSFER
MATHEMATICAL MODELS
NATURAL CONVECTION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REFRIGERATORS
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
SOLAR REFRIGERATORS
THERMODYNAMICS
WATER