FLOW WORK & Energy Conservation in Open Systems in 11 Minutes!

Energy Conservation
Open Systems
Mass Conservation
Flow Work

0:00 Mass and Energy Conservation
0:31 Energy Entering and Leaving
1:40 System vs. Flow Work
2:40 Work Flow In and Out
3:46 Enthalpy Substitution
4:08 General Energy Conservation Equation
4:39 Special Cases
5:02 Conservation of Energy Example
5:50 Solution - Mass Conservation
7:08 Solution - Energy Conservation
8:19 IMPORTANT Unit Analysis
9:23 Kinetic Energy - Negligible?

Previous Lecture:
14. Mass and Volumetric Flow Rate:

Next Lecture:
16. Pipe Flow, Nozzles, Diffusers, and Throttling Devices

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Other Thermodynamics Lectures:

19. Transient Systems:
28. Otto Cycle:
29. Standard Diesel Cycle:
30. Rankine Cycle:
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Other Engineering Courses (Playlists):

[LessBoringLectures]

CORRECTIONS: 1) 5:24 The problem statement is supposed to use 6 m/s as the inlet velocity, not 5 m/s! All the calculations and results are consistent with vi = 6 m/s. 2) 7:51 The equation should read volumetric flow rate OVER velocity, not times velocity; the value for m dot e is correct, though.

[brunoabdelnour]

This is absolutely amazing and thorough while still being short. Great job and thank you!!

[kavehzamani]

@ 7:55 you multiplied volumetric flow rate by the specific volume when you should have divided it, to obtain the mass flow rate. The numbers were correct though. Thanks for making these videos you're saving my thermodynamics grade 🙏🙏🙏

[jbergamp]

Eres un cabron d bueno con estos videos. Muchas gracias

[gooddeedsleadto]

How does pressure remain constant in the superheater phase of the boiler or air conditioning running on rankin cycle?
Has it got something to do with the concept of workflow or specific volume?
Kindly remove this bothering. Confusion?