Week 5 Lecture 7 Flashcards
Rate of entropy change =
Rate of entropy transfer + rate of entropy production
At steady state the rate of entropy change is ____
0
At steady state, the equation for rate of entropy is:
0 = rate of entropy transfer + rate of entropy production
The rate of entropy transfer =
Σ(Qk/Tk) + Σmisi - Σmjsj
(Qk/Tk) represents the heat transfer occuring at temperature Tk
i and j refer to the inlet and outlet streams
Rate of entropy production
S gen
Rate of entropy transfer + Rate of entropy production equation
Σ(Qk/Tk) + Σmisi - Σmjsj + S gen = 0
Entropy is not a ________ quantity
conserved
If the process is irreversible, there maybe an ________
internal generation
If the process is ________, there maybe an internal generation
irreversible
Type of diagram used for Rankine cycle
T-S diagram
T is for temperature
S is for entropy
enthalpy-entropy chart
h-s diagram
enthalpy-entropy chart
p-h diagram
pressure enthalpy diagram
constant entropy
isentropic
isentropic conditions are shown by a ____ line on T-S and H-S diagrams
straight vertical
example of a reversible heat engine
carnot cycle
The two vertical steps on a carnot engine are ____ processes
adiabatic