PRESSURE - GAUGE, ABSOLUTE, VACUUM AND ATMOSPHERIC PRESSURE | ENGINEERING THERMODYNAMICS

On this video, we will be discussing about PRESSURE. This is one of the fundamentals that we need to understand once we start studying thermodynamics, fluid mechanics and hydraulics. Moreover, this is a basic subject in studying chemistry and physics so it is really important to understand pressure and properly differential gauge pressure (sometimes written as gage pressure), vacuum pressure, absolute pressure and atmospheric pressure. On this video, we will be explaining these types in a way to easily understand and remember. We will also be solving problems in order to understand the application of what we have learned. Language is in mixed English and Filipino / Tagalog.
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Lecturer: Engr. Eleazar Salut, Chemical Engineer

[@josemariavillacorta4359]

thank you so much sir! ang dami ko pong natutunan sayo lalo na't hirap akong maka sunod sa klase. kudos!

[@jameek2228]

salamat sir huhu nakatulong tlaga to

[@solidtunemusic2300]

Very helpful! Thank you very much!

[@JasperKyleICacho]

Thank you so much, Sir! I was able to visualize and easily understand all that was bothering me.

[@Enginerds]

We are happy to help

[@JaykeSapalaran-iq3qs]

Sir salamat po sa pag share mo Ng iyong kaalaman 🫡🫡🫡🫡🫡

[@Enginerds]

Its my pleasure

[@ardalesjohnarjaya.1265]

Thank you for this po!!

[@Enginerds]

You're welcome

[@Kendallela]

Best explanation. 🎉

[@DIYwithengineering]

Thank you for sharing sir godbless

[@user-cj9rv4ii5w]

Thank you so much sir Engr

[@cortanamorgenstern7541]

Hi Sir, thank you. You made the lesson easier. Question lang po, say sa problem di sya stated kung gauge pressure. Matic po ba yun na absolute pressure sya?

[@mor10a]

Solid po na padali

[@thermodynamics9554]

A blessed day sir, May I know your reference material (ebook, book) in this lecture video? Btw, thank you for this kind of learning video.

[@Enginerds]

We basically used different sources and combined them together. This also includes our personal notes that we made while we are still studying in the university.

[@AnaMaria-sd4pj]

How come for the last question (problem 5) you didn’t subtract the atmospheric pressure from pgh when finding the gauge pressure?

[@aaronjamestagailo4917]

Gauge pressure is equal to pgh. Therefore we dont need atmospheric pressure to solve for the Patm.

[@3dprintwiz378]

Ano po ang naka lagay sa Steam Tables, guage or absolute?

[@Enginerds]

It is more often in absolute scale. But you still have to make sure since some steam tables are using gauge or both like this: www.miyawaki-inc.com/en/technical/table02 Steam tables based on gauge pressure indicate atmospheric pressure as 0, while steam tables based on absolute pressure indicate it as 101.3 kPa (14.7 psi). Also, to distinguish gauge pressure from absolute pressure, a "g" is typically added to the end of the pressure unit, for example kPaG or psig.

[@3dprintwiz378]

@@Enginerds So if I have a pressure reading on my guage, I should convert it to absolute before referring to my steam tables. By the way, my book of steam tables does not indicate A or G in the pressure column. Thank you very much for the response sir.

[@Enginerds]

@@3dprintwiz378 Check the saturation temperature of steam at 100 deg C saturation temperature. If it is zero, then it is gauge. If it is 101.325 KPa then it is absolute

[@3dprintwiz378]

@@Enginerds Thank you very much sir. Just confirms my reference steam tables are in absolute pressure.