[ILM] 102B Flashcards
1
Q
changing a liquid to a vapour
A
absorbs heat
2
Q
changing a vapour to a liquid
A
expels heat
3
Q
2 main refrigeration cycles
A
- vapour compression cycle
- absorption cycle
4
Q
Vapour compression has 2 meanings
A
- positive displacement
- centrifugal compression(non-positive displacement)
5
Q
positive displacement
A
the process of using a moving piston to squeeze vapour in a cylinder
ex) reciprocating compressor
6
Q
centrifugal compressor
(non-positive placement)
A
has a radial(impeller) wheel that moves vapours
7
Q
Vapour compressor cycle
A
- Compressor - vapour pump
- Condenser - heat dissipation(소실) unit
- TXV - pressure reducer
- Evaporator - heat collector unit
8
Q
Inside of condenser you see
A
- desuperheat
- saturation
- subcooling
9
Q
5 compressor types
A
- Reciprocating
- Rotary - must have check valves
- Scroll - must have check valves
- Screw
- Centrifugal
10
Q
What is a compressor
A
a vapour pump
11
Q
what is a condenser
A
a heat exchanger(heat dissipating)
12
Q
what is a metering device
A
a pressure reducer
13
Q
a metering device can have an adjustable set point
A
True
14
Q
what is an evaporator
A
a heat exchanger(heat collector)
15
Q
kinetic energy
A
energy based on motion
