Page 312 - Steam Turbines Design, Applications, and Rerating

286 Chapter Fourteen

Figure 14.17 Inlet size requirements for single-valve, single-stage steam turbines, metric
units. (Elliott Company, Jeannette, Pa.)

Step 6: Determine corrected steam rate by formula:
base steam rate (hp + hp loss)
Corrected steam rate = ×
superheat correction factor hp

or

Base steam rate (kW + kW loss)
×
SCF kW
Step 7: Determine steam flow (SF) by the formula:

Steam flow = corrected steam rate × hp

or
Steam flow = corrected steam rate × kW

Step 8: Determine the required inlet size using Fig. 14.16 or 14.17,
knowing SF and turbine inlet pressure and temperature.