eml 3100 lec 3 - Thermodynamics UNIVERSITY OF As FLORIDA we...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture No. 3 1 UNIVERSITY OF FLORIDA Thermodynamics As we have seen on the psychrometric chart, temperature and pressure are important intensive properties. They are used in many thermodynamic calculations.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture No. 3 2 UNIVERSITY OF FLORIDA Thermodynamics Pressure Force exerted by a fluid per unit area. Units: Pascal, Pa = 1 N/m 2 Generally use kPa or MPa 1 atm pressure = 14.7 psia = 34 ft water = 760 mm Hg = 101.3kPa = 29.92 in. Hg, etc In this class, kPa, MPa or psi (doesn’t really violate rule that all names are capitalized but M is capital here also and stands for 1,000,000…my days in chemistry we didn’t use cap M…convention now is to use cap M
Background image of page 2
Lecture No. 3 3 UNIVERSITY OF FLORIDA Thermodynamics Absolute vs Gage Pressure Pabs = Pgage + Patm e.g. psia = psig + 14.7 for a standard atmosphere If a gage located in Gainesville reads, 20 psig then the absolute pressure is 20 + 14.7 or 34.7 psia For thermodynamic relationships get accustomed to using absolute pressure. You’ll see this become more important as we consider ideal gases.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture No. 3
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/05/2011 for the course EML 3100 taught by Professor Sherif during the Summer '08 term at University of Florida.

Page1 / 16

eml 3100 lec 3 - Thermodynamics UNIVERSITY OF As FLORIDA we...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online