Question

Which of the following statements is/are correct regarding superheater in boilers?

1. It is a heat exchanger in which heat is transformed to the saturated steam to increase its temperature.

2. It raises the overall efficiency.

3. It reduces turbine internal efficiency.

Select the correct answer using the code given below.
1. 1 and 2
2. 1 and 3 
3. 2 and 3
4. 1 only

Answer 1

Correct Answer - Option 1 : 1 and 2

Concept:

• A superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam
• Superheated steam is used in steam turbines for electricity generation, steam engines, and in processes such as steam reforming
• While the temperature of the steam in the superheater rises, the pressure remains the same as that of the boiler
• The super heater is a heat exchanger in which heat is transferred to the saturated steam to increase its temperature and hence it raises the overall efficiency.
• It reduces the moisture content in last stages of the turbine and thus increases the turbine internal efficiency.