Lec 5 - Thermodynamic Cycles Thermodynamic Cycle – A...

This preview shows pages 1–4. Sign up to view the full content.

Lect 5 1 st Law of Thermodynamics, Energy, Cycles Kinetic Energy - The energy of mechanical motion 2 2 1 mV KE = ( ) 2 1 2 2 2 1 1 2 V V m KE KE KE - = - = Δ Potential Energy – “Stored” mechanical energy e.g. gravitational potential energy mgz PE = ( ) 1 2 1 2 z z mg PE PE PE - = - = Δ Internal Energy for a thermodynamic system is represented By the symbol U 1 2 U U U - = Δ Total Energy for a thermodynamics system PE KE U E + + = PE KE U E Δ + Δ + Δ = Δ

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

View Full Document
The First Law of Thermodynamics and the Energy Balance There is a property of matter called Energy and Energy is conserved. The Energy Balance: W Q E E - = - 1 2 W Q U PE KE - = Δ + Δ + Δ Other forms of the Energy Balance W Q dE δ δ - = (differential form) W Q dt dE

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Thermodynamic Cycles Thermodynamic Cycle – A sequence of processes that begins and ends at the same state Examples: Energy balance for a cycle: cycle cyccle cycle W Q E-= = Δ Power Cycle: out in cycle Q Q W-= Power cycle efficiency: (thermal efficiency) in cycle Q W = η or in out in Q Q Q-= Refrigeration and Heat Pump Cycles in out cycle Q Q W-= Refrigeration: Coefficient of performance cycle in W Q = β or in out in Q Q Q-= Heat pumps: Coefficient of performance cycle out W Q = γ or in out out Q Q Q-= β...
View Full Document

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern