The design of gas turbine heat recovery boiler systems is based on several engineering and economic parameters that require lengthy iterative calculations. Computer programs have been developed which reduce the time factor and provide the optimum design for a given set of exhaust conditions and steam requirements. This paper describes programs which provide an installed cost estimate that can be used to evaluate the affect of variations in boiler pinch point, back pressure, stack temperature, superheated steam temperature, feed water approach temperature, and supplementary firing for any gas turbine heat recovery application. Another program provides operating performance of the selected boiler design through a range of exhaust conditions due to ambient or load changes, and also for changes in the steam capacity or pressure requirements. Data from this program is used to plot performance “maps” for the full range of “off-design” operating conditions.

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