Harnessing Thermal Energy in Power Generation

The video explains the operation of coal-based thermal power plants, focusing on the Rankine cycle. It covers the generation of electricity using steam turbines, the process of condensing steam to boost pressure, and restoring temperature with boilers. Techniques like superheating and reheating are discussed to enhance efficiency. The video also addresses heat management and pollution control using cooling towers and electrostatic precipitators.

What is the primary working fluid used in thermal power plants?

• Water

• Air

• Mercury

• Oil

What is the main function of a steam turbine in a thermal power plant?

• To generate electricity

• To increase steam pressure

• To burn coal

• To cool down the steam

Why is compressing steam directly not efficient in power plants?

• It requires too much space

• It is too slow

• It is a highly energy-intensive process

• It causes pollution

What type of boiler is commonly used in high-capacity power plants?

• Fire tube boiler

• Water tube boiler

• Gas boiler

• Electric boiler

What is the purpose of superheating steam in a power plant?

• To decrease the temperature of the steam

• To cool down the steam

• To increase the efficiency of the cycle

• To reduce steam pressure

What is the maximum temperature that steam turbine materials can withstand?

• 500 degrees Celsius

• 400 degrees Celsius

• 600 degrees Celsius

• 700 degrees Celsius

What is the role of an open feedwater heater in a power plant?

• To burn coal

• To increase steam pressure

• To remove dissolved gases from the feedwater

• To cool down the steam

How is cold liquid supplied to the condenser in a power plant?

• Using a heat exchanger

• Through a cooling tower

• By a compressor

• With a fan

What device is used to clean exhaust gases before releasing them into the atmosphere?

• Electrostatic precipitator

• Cooling tower

• Boiler

• Compressor

What is the efficiency range of modern thermal power plants?

• 20 to 25%

• 40 to 45%

• 30 to 35%

• 50 to 55%