ORNL-DWG 78-3196R


100%


















33%








 0%
 (a) ELECTRIC-ONLY
 POWER PLANT


HEAT REJECTED
 TO THE
 ENVIRONMENT






THERMAL ENERGY
 FOR DISTRICT
 HEATING


25%1


(b) COGENERATION
 POWER PLANT


Fig. 1. Comparison of energy use from electric-only
 and cogeneration steam turbine power plants.