Abstract
The effects of working fluid properties on the gas turbine performance have been investigated. The convective heat transfer rates have been compared for various gases and the gas which is more favorable than air has been determined. It is found that the convective heat transfer coefficient for helium is almost twice that for air. This implies that the helium heat-exchanger needs only half the surface area of tubing for the same temperature difference comparing with one for air, or that higher effectiveness can be obtained economically by using helium.
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