Saturday, 8 March 2025

Steam Pressure vs Atmospheric Pressure

- Steam Pressure: This refers to the pressure exerted by steam within a system. It can be higher or lower than atmospheric pressure, depending on the state of the steam and the equipment involved (like boilers or turbines).

- Atmospheric Pressure: This is the pressure exerted by the weight of the air in the atmosphere, typically at sea level, approximately 101.3 kPa (kilopascals) or 14.7 psi (pounds per square inch). 

In thermal systems, managing steam pressure is crucial for efficiency; steam is often condensed at pressures lower than atmospheric pressure to optimize energy recovery and system performance.

The correct answer is 3.
Condenser.

Explanation:
In a thermal power station, the condenser is designed to convert steam back into water after it has done work in the turbine. This process occurs at a pressure lower than atmospheric pressure to facilitate efficient heat exchange and condensation. The lower pressure helps maximize the thermal efficiency of the power cycle by allowing the steam to condense effectively, which is essential for maintaining the overall cycle.