Ammonia vaporization studies related to the OTEC program. Annual report

Technical Report · Fri Feb 01 04:00:00 EST 1980

OSTI ID:5950904

Sabin, C M; Poppendiek, H F; Connelly, D J; Roth, B W

The results of the third year of a program to provide design information applicable to OTEC heat exchangers are summarized. The tasks addressed during this year include acquisition of test data in film evaporation of ammonia over horizontal tubes, condensation of ammonia over horizontal tubes with modified surfaces, and effects of vapor crossflow on the liquid distribution in horizontal tube film evaporators. Data are presented on the film evaporation heat transfer performance of single tubes with various materials and surface finishes, for a range of heat fluxes and liquid loadings appropriate to an OTEC plant. Data are presented on the condensation heat transfer performance of single tubes with helically-grooved and wire-wrapped surfaces. It is shown that such modifications enhance the heat transfer rates significantly, when compared to a plain smooth tube. Data are presented which illustrate both qualitatively and quantitatively the effects to be expected from vapor-liquid interactions in horizontal tube film evaporators.

• Research Organization: Geoscience Ltd., Solana Beach, CA (USA)
• DOE Contract Number: AC03-76ET20340
• OSTI ID: 5950904
• Report Number(s): GLR-216; ON: DE82004412
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
AMMONIA
DESIGN
ENERGY TRANSFER
EVAPORATION
FLOWMETERS
FLUID FLOW
HEAT EXCHANGERS
HEAT FLUX
HEAT TRANSFER
HYDRIDES
HYDROGEN COMPOUNDS
MEASURING INSTRUMENTS
METERS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OCEAN THERMAL POWER PLANTS
PERFORMANCE
PHASE TRANSFORMATIONS
POWER PLANTS
SOLAR POWER PLANTS
THERMAL POWER PLANTS
TUBES
VAPOR CONDENSATION