Experimental data for ammonia condensation on vertical and inclined fluted tubes

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/6446321· OSTI ID:6446321

Combs, S. K.

Heat transfer experiments were run to evaluate the performance of single fluted tubes with ammonia condensing on the outside for the DOE Division of Central Solar Technology, Ocean Systems Branch. Data are presented for tubes of 2.54-cm (1-in.) nominal diameter and 1.2 m (4 ft) in length including (1) tests with a vertical fluted tube with seven equally spaced drainage skirts--''effective'' condensing length of 0.15 m (0.5 ft), (2) tests with both a smooth and a fluted tube inclined 30/sup 0/ off vertical, and (3) tests with a doubly fluted tube. The results for the tube with drainage skirts showed that for ammonia there was no advantage in going to shorter condensing lengths (< 1.2 m (4 ft)) in the range of heat fluxes tested (5000--50,000 W/m/sup 2/ (1500--16,000 Btu/hr . ft/sup 2/)). For the inclined tests, the film condensation coefficients for the smooth tube were more than doubled over results for a vertical smooth tube; whereas, for the inclined fluted tube, the heat transfer performance was slightly lower than for a vertical orientation. Overall heat transfer coefficients are presented for the doubly fluted tube over a range of water velocities and heat loads; data are given for two inside tube (water-side) configurations--one for full flow through the tube and one for flow through an annulus.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6446321
• Report Number(s): ORNL-5488
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
AMMONIA
CONDENSERS
DATA
ENERGY TRANSFER
HEAT EXCHANGERS
HEAT TRANSFER
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OCEAN THERMAL POWER PLANTS
PERFORMANCE
PERFORMANCE TESTING
POWER PLANTS
SOLAR POWER PLANTS
TESTING
TUBES
VAPOR CONDENSATION
VAPOR CONDENSERS