Internal heat transfer experiments for OTEC evaporator tubes
In the Applied Physics Laboratory (APL) Ocean Thermal Energy Conversion (OTEC) plant-ship concept, large-diameter (3 to 4 in.) aluminum tubes with ammonia flowing inside are being proposed for use as a low-cost multipass evaporator. Experiments measuring the internal two-phase heat transfer coefficients of ammonia flowing inside a 3-in.-diameter, 20-ft-long aluminum tube have been conducted at the APL Propulsion Research Laboratory. Prior to these tests, no data were available for large-diameter tubes at the heat fluxes that will occur during OTEC operations (1000 to 3000 Btu/h-ft/sup 2/). The results provide a basis for predicting the internal heat transfer characteristics needed for the design of an evaporator core unit to be tested in the next phase of the development program.
- Research Organization:
- Johns Hopkins Univ., Laurel, MD (USA). Applied Physics Lab.
- DOE Contract Number:
- AI01-77ET20342
- OSTI ID:
- 6881976
- Report Number(s):
- DOE/ET/20342-T4; ON: DE84009335
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
140800* -- Solar Energy-- Ocean Energy Systems
ALUMINIUM
AMMONIA
ELEMENTS
ENERGY TRANSFER
EVAPORATORS
FLUID FLOW
HEAT TRANSFER
HYDRIDES
HYDROGEN COMPOUNDS
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OCEAN THERMAL POWER PLANTS
POWER PLANTS
SOLAR POWER PLANTS
THERMAL POWER PLANTS
TUBES
TWO-PHASE FLOW