This paper discusses test results of inserting a cylindrical fouling probe unit in a shipboard LM2500 and a land-based Solar Saturn gas turbine exhausts. These probes are total heat flux measurement devices for film chemistry and heat transfer experiments under simulated heat exchanger conditions.The average film build-up rate and heat transfer rate are inversely proportional to the test time. The total thermal resistance of the fouled probe increased linearly with time. After a five-hour test, the measured fouling thermal resistance factor was 1.5 times the recommended TEMA design factor. As the average surface temperature for the tests increased, the average fouling film build-up rate and the film sulfur content decreased. Lower wall temperatures produce thicker fouling films. The thermal conductivity of the test films ranged from 0.0204 to 0.0272 BTU/HR-F-ft2/ft (0.0353 to 0.0470 J/sec-K-m2/m).Up to 30% by weight of the film samples consists of metals and sulfur present in the fuel as impurities or additives. Fouling deposits from shipboard waste heat boiler operations, unlike those from land-based operation, will be affected by more alkali metals in salty air.
Fouling Effects of Turbine Exhaust Gases on Heat Exchanger Tubes for Heat Recovery Systems
Sae Technical Papers
Passenger Car Meeting & Exposition ; 1979
1979-02-01
Conference paper
English
Fouling Effects of Turbine Exhaust Gases on Heat Exchanger Tubes for Heat Recovery Systems
Automotive engineering | 1979
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