MAE 201, Chapters 1 - 5.3
|
Thermodynamic System (TS)
any object or system of objects
|
|
Types of TS
Isolated (no interaction with surroundings), Closed ( no mass exchange), open (mass exchange)
|
|
State Postulate
Defines a number of properties required to fix a state
|
|
Intensive properties
(mass ind.) if the property is the same
|
|
Extensive properties
(mass dep.) if the property is doubled
|
|
macroscopic energys
(Work) kinetic, potential
|
|
microscopic energys
(Heat transfer) thermal, chemical, nuclear, etc
|
|
Closed
U=Qnet-Wnet
|
|
Open
U=Qnet-Wnet+ m(ein-eout)
|
|
adiabatic
no heat transfer
|
|
isothermal
T is constant
|
|
isobaric
P is constant
|
|
isochoric
V is constant
|
|
Specific _______
x=X/m
|
|
kinetic energy
ke=v2/2
|
|
potential energy
pe=gh
|
|
specific total energy
e=ke+pe+u
|
|
total energy
E=mv2/2 +mgh+u
|
|
electric power
W=Voltage*current
|
|
steady electric power
W=Voltagecurrenttime
|
|
boundary work
W=P*V
|
|
shaft work
W= T2pi*number of turns
|
|
Thermal devices
n=Q/mfuel*HV (burner, water heater)
|
|
Mechanical devices (Turbine)
n=Wout/Efluid
|
No comments yet.
Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
