boiler effectiveness

boiler evaporative capacity

factor of evaporation

boiler efficiency.

can be raised rapidly

is raisd at slower rate

is raised at same rate

could be raised at fast/slow rate depending on design

20%

40%

50%

90%.

15%

20%

30%

45%

pulverised fuel fired boiler

cochran boiler

lancashire boiler

babcock and wilcox boiler