Steam Nozzle Example Problem - Steady State Energy Rate Balance

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Күн бұрын

Find Final Temperature and Cross Sectional Area to achieve a given Exit Velocity leaving the nozzle and entering a turbine using Steady State Energy Rate Balance, Mass Rate Balance, and Ideal Gas Law.
Control Volume Analysis of a nozzle requires both energy and conservation of mass. The same approach used for this nozzle can be used for heat exchangers, turbines, and pumps - any single inlet, single outlet component. (Multiple inlets or outlets can also be modeled by adding those extra terms.) Just start with the general form of the Energy Rate Balance and cross off terms you don’t need.
Be especially careful with your units. There are a lot of opportunities to make unit errors in these problems.
TIMECODES
0:00 Energy Rate Balance
5:35 Mass Rate Balance
6:09 Ideal Gas Law

Пікірлер: 8

@stma8258 3 ай бұрын

Hi, thanks for the video. Do you know if, with thermodynamic equations, it is possible to calculate what is exiting a nozzle, having as an input the inlet flow data and the geometry of the nozzle data (A2/A1)?

@BrianBernardEngineering 3 ай бұрын

This could potentially also be a Fluid Mechanics problem, not Thermodynamics. With inlet velocity and area, and outlet area, you can solve for outlet velocity using "Continuity Equation", ie conservation of mass. Then with outlet velocity, you can find outlet pressure using Bernoulli Equation (or Energy Equation if you want to account for head loss in the nozzle), then that outlet pressure could be used to find what you are looking for?

@stma8258 3 ай бұрын

@@BrianBernardEngineering thanks Brian for clarifying this concept. Indeed I have seen that in order to simulate a nozzle, the solutions available are all about some CFD code.

@antonyevangelista6496 3 ай бұрын

can you give an example of interpolation I always struggle with it and finals are coming up.

@BrianBernardEngineering 2 ай бұрын

Absolutely - do a youtube search for "How to Read Steam Tables - 5 Interpolation Example Problems" and you will probably find it. Or you can go to my channel page, it's one of my oldest videos so the production quality isn't as good as my newer videos, but I think it will still be useful for you. Good luck on finals!