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conventional mounting arrangement. The complete rotating assembly weighs 1860 lbs.' Figure 4 Rotor Assembly of 1000 kW Turbine Generator-Pump Unit The stator housing and turbine volute for the proto type machine were built as welded steel fabrications. Subsequent units will employ castings for the turbine volute, stator housing, and bearing pedestals. Fig ure 5 is a view of the prototype machine in the test installation. The control and switchgear cabinet rugged unit, having undergone many start-stop cycles, overspeed events, full load operation and a 1000 hour endurance test. Figure 5 1000 kW Turbine-Generator-Pump Unit and Switchgear/Control Module on Test TABLE 7 DESIGN OPERATING CONDITIONS OF PROTOTYPE MACHINE Turbine Inlet: temperature, of - 230 pressure, psia - 79.6 Condenser: temperature, of - 94. pressure, psia - 9.3 System flow rate, lb/hr - 325,000 Generator power output, kW - 1,000 Bearing liquid supply pressure, psia 6 Teat I o Teat II x Teat lIa 300!------:5tlO!::-----":'lOOO::!:::-----:1~5tlO~ Turbine Shalt Power (hpj 802099-1 Figure 6 Test Results: Aerodynamic Efficiency of 1500 hp Turbine ESL-IE-81-04-90 can be seen in the foreground. This cabinet contains a 4160 volt reduced-voltage motor starter which was employed in two modes during test operations: a) to start the unit up, using the induction generator as a motor; b) to connect the generator to the electric utility power system after it was brought to within + 2% synchronous speed by the turbine. The latter procedure will be the standard method for bringing units on line, although the former procedure was equally effective. The cabinet also contains a Woodward 2301 load sharing and speed control governor, programmable controller for sequencing the system startup and shutdown cycles, local control and annunciator panel, and contactors for condensate pumps. The turbine achieved an aerodynamic efficiency of 84 percent at the design conditions, given in Table 7. Results of aerodynamic performance tests are shown in Figure 6. Test results for overall efficiency of the turbine-generator unit, from turbine inlet vapor to electric power output, are shown in Figure 7. An overall efficiency of 74% was achieved at the 1000 kW design point condition with relatively flat performance at lower power levels. The machine was shown to be a reliable, 520 Proceedings from the Third Industrial Energy Technology Conference Houston, TX, April 26-29, 1981PDF Image | ORC WASTE HEAT RECOVERY IN REFINERIES AND CHEMICAL Process
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