Thermodynamics Lecture Notes Summary

5 Pages
Unlock Document

Mechanical and Aerospace Engineering
MAAE 2400
Edgar Matida

MAAE2400 Thermo Exam Review Units & Convention: 2 2 1N=1kg∙m/s 1MPa=1N /mm 1¿0.1MPa ∣¿ −P atm 1J=1N /m K=℃+273.15 PgaugeP ¿ Q>0: Heat transfer to the system W>0: Work done by the system Closed Systems: Fixed quantity of matter – use internal energy (u) ∆E=∆U+∆KE+∆ PE=m u −u + ∙m V −V 1 2 2+m(z −z ) First Law: ( 2 1) 2 ( 2 1 ) 2 1 Open Systems: Region of space through which mass may flow – use enthalpy (h) 2 h+ V1 2 2 V2 h+ 2 First Law: m out +gz 2) m (¿+gz 1)− ∑ ¿ ¿ dE cv ́ ́ dt =Q −cv+ cv ∑ ¿ dE cv For steady-state/steady-flow: dt =0 Process Parameters: MAAE2400 Adiabatic Process: No thermal interaction with surroundings Isothermal Process: Constant temperature Isobaric Process: Constant pressure Isentropic Process: Constant entropy Power Cycle: Creates work from heat transfer (Hot -> Cold) Refrigeration Cycle: Uses work to create heat transfer (Cold -> Hot) QC TH Coefficient of Performance: βR= Ẃ , βmax T −T C H C Heat Pump: Refrigeration Cycle, but keeps something hot instead of cold Q H Coefficient of Performance: βHP ́ W C Heat Transfer Q́ =−kA ∆T Conduction (Fourier): Cond ∆ x , where k=thermalconductivity[W /m∙ K] ́ Radiation: Q rε∙σ∙ A∙(T bodyT surface σ=5.67×10 W/m ∙K 2 4 ε=Emissivity Where, and MAAE2400 Q Ch∙A ∙(T bodyT surface Convection: Phase Quality: mvapour m vapour x= = m liquid vapour m h=h +x(h −h ) I.e. For Enthalpy: f g f Ideal Gas: pV=mRT or pv=RT kJ 8.314kmol∙K R =287 J ∙K R= air kg
More Less

Related notes for MAAE 2400

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.