Heat Recovery Boilers

Question 1

HRSG produces steam using what source?

Answer 1

waste gases from gas turbines, diesel engines and off-gases

Question 2

Why is there typically no water-wall in a HRSG

Answer 2

no fireball = no radiation

Question 3

What are the three sections of heat transfer in the HRSG?

Answer 3

1. Superheater
2. evaporator
3. economiser

Question 4

Three objectives of a gas bypass around the HRSG

Answer 4

1. Allows the gas producing source to run without the HRSG
2. Allows start up to be controlled independent of load
3. Allows the gas producing source and HRSG loads to be controlled independently