Study of Falling Jet Flash Evaporators

Technical Report · Mon Nov 01 00:00:00 EST 1982

DOI:https://doi.org/10.2172/6741834· OSTI ID:6741834

Kreith, F.; Olson, D. A.; Bharathan, D.; Green, H. J.

Experimental results of flash evaporation from sheets of water, 3.2 mm and 6.3 mm thick and 27.9 cm wide, falling freely in the presence of their own vapor, are reported. With no flashing the jets fall in coherent sheets, but with flashing the jets were observed to spread and break up into droplets. Flashing was characterized by an effectiveness parameter, which was found to increase with increasing water temperature and jet length. Variations in water flow rate and heat flux did not influence the effectiveness appreciably.

• Research Organization: National Renewable Energy Lab. (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 6741834
• Report Number(s): SERI/TP-252-1415; ON: DE83002462
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
DIRECT CONTACT HEAT EXCHANGERS
FLASHING
JETS
ACCURACY
DROPLETS
FLOW RATE
HEAT FLUX
REYNOLDS NUMBER
WATER
WATER VAPOR
EVAPORATION
FLUIDS
GASES
HEAT EXCHANGERS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
VAPORS
flash evaporation
direct-contact heat transfer
thermal efficiency
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