more

less

same

depends on other factors

pressure ratio alone

maximum cycle temperature alone

minimum cycle temperature alone

both pressure ratio and maximum cycle temperature

carbonisation of coal

passing steam over incandescent coke

passing air and a large amount of steam over waste coal at about 65°C

partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

carbonisation of coal

passing steam over incandescent coke

passing air and a large amount of steam over waste coal at about 65°C

partial combustion of caol, eke, anthractie coal or charcoal in a mixed air steam blast

control temperature

control output of turbine

control fire hazards

increase efficiency