Alternate Fuels Capability of Gas Turbines in the Process Industry
As we move into the latter 1970’s and early 1980’s, we can anticipate a period of continuing uncertainty in availability of fuel supplies for the process industry. Even though the overall picture is unclear, there are some aspects of the total problem that are predictable, with a reasonable degree of confidence. One of the developments that can be predicted on the domestic scene is the unavailability of natural gas as an industrial fuel. Short supplies of this resource have significantly limited the installation of new facilities utilizing natural gas as a fuel supply, as well as creating a need to convert existing equipment to use alternate supplies of fuel where uninterruptable sources of natural gas are no longer available. This paper discusses the fuel flexibility of heavy-duty gas turbines and is a status report on the capability of today’s equipment. In addition, techniques for evaluating alternate gas turbine fuels including requirements for cleanliness, combustion properties, physical properties, composition, performance and emissions characteristics, etc., are discussed. Fuels which are covered include: Gasification Process Derived Fuels, By-Product Gases, Distillate Oil, Crude Oil, Residual Oil, Vaporized Liquid Fuels, and Liquefied Coal Products.