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FAQs on Nozzle and diffuser, Power Plant Engineering - Thermodynamics - Mechanical Engineering

1. What is a nozzle in power plant engineering?
Ans. A nozzle in power plant engineering is a device that is used to increase the velocity of a fluid, such as steam or gas, by converting its pressure energy into kinetic energy. It is commonly used in turbines to direct the flow of fluid and enhance the efficiency of power generation.
2. How does a diffuser work in power plant engineering?
Ans. A diffuser in power plant engineering is a device that is used to reduce the velocity of a fluid, such as steam or gas, by converting its kinetic energy into pressure energy. It allows the fluid to expand and slow down, increasing its pressure and providing a more favorable condition for subsequent processes in the power plant.
3. What is the purpose of a nozzle in a power plant turbine?
Ans. The purpose of a nozzle in a power plant turbine is to accelerate the fluid flow, typically steam, coming out of the turbine blades. By increasing the velocity of the steam, the nozzle helps to extract more energy from the fluid and improve the overall efficiency of the power generation process.
4. How does a diffuser improve the efficiency of a power plant?
Ans. A diffuser improves the efficiency of a power plant by recovering some of the kinetic energy from the fluid flow and converting it into pressure energy. By doing so, the diffuser increases the pressure of the fluid, providing a more favorable condition for subsequent processes in the power plant, such as combustion or expansion in turbines.
5. What are the key differences between a nozzle and a diffuser in power plant engineering?
Ans. The key differences between a nozzle and a diffuser in power plant engineering are: - A nozzle increases the velocity of a fluid, while a diffuser decreases it. - A nozzle converts pressure energy into kinetic energy, while a diffuser converts kinetic energy into pressure energy. - A nozzle is typically used at the inlet of a turbine, while a diffuser is used at the outlet. - A nozzle is designed to accelerate the fluid flow, while a diffuser is designed to decelerate it. - A nozzle is usually converging in shape, while a diffuser is usually diverging.
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