Question

Which boiler is most successful boiler in the gas turbine industries?

(a) Because it has greater flexibility

(b) It is easy to control, it’s fully automatic

(c) It has higher thermal efficiency of all

(d) Can increase heat transfer without changing its size

The question was asked during an interview.

My doubt stems from Types of High Pressure Boilers topic in section Steam Generators & Accessories of Energy Engineering

Answer 1

Correct option is (d) Can increase heat transfer without changing its size

The best explanation: When the velocity of gas is greater is greater than speed of the sound, its heat transfer rate also increases. More heat is transferred from the gas to water comparatively when the heat transfer is at subsonic speed. This boiler can increase the heat transfer or can say steam generation rate without increasing boiler size. This is why; Velox boiler is most successful boiler in the gas turbine industries.