Energy Analysis and Cycle Flashcards
1
Q
What is a cycle?
A
- A sequence of processes that begin and end at the same state
2
Q
What are the 3 most common cycles in Thermodynamics?
A
- Power, refrigeration, and heat
3
Q
What is the power cycle?
A
- Takes in heat, generates work, and releases work to the surroundings
4
Q
What is the balanced formula of a cycle?
A
Qcycle = Wcycle
5
Q
What is the balanced formula of a power cycle?
A
Qin - Qout = Wcycle
Wcycle > 0
6
Q
What is the efficiency?
A
purpose/cost
7
Q
What is the efficiency of a power cycle?
A
Wcycle / Qin
8
Q
What is the Refrigeration cycle?
A
- Absorbs heat from the inside (cold), work is added from electricity, and heat is released into the surroundings
- transfer heat from low to high temperatures by using mechanical work as the input
9
Q
What is the balance of a Refrigeration cycle?
A
Wcycle = Qout - Qin
10
Q
What is the coefficient of performance? (Beta)
A
Purpose/ Cost = Qin / Wcycle
result can be greater than 1
11
Q
What is the heat cycle?
A
-transfer heat from low to high temperatures by using mechanical work as the input
12
Q
What is the coefficient of performance in the heat cycle?
A
- gamma
- game = Qout/Wcycle
- gamma is greater than 1
