Cooling Systems Flashcards
What are the components of a vapor compression cycle?
- Compressor
- Condenser
- Expansion Valve
- Evaporator
What is the function of a compressor?
Increase pressure
What is the state of the refrigerant entering and leaving the compressor?
In as a gas
Out as a gas
What is the function of a condenser?
Gas to a liquid
What is the state of the refrigerant entering and leaving the condenser? Why?
In as a gas
Out as a liquid
High pressure
What is the function of the expansion valve?
Reduce pressure
What is the state of the refrigerant entering/leaving the expansion valve?
In as a liquid
Out as a liquid
What is the function of the evaporator?
Liquid to gas (cooling coils)
What is the state of refrigerant entering/leaving the evaporator?
In liquid
Out gas
Low pressure
At which components of the vapor compression cycle is energy added?
Compressor and evaporator
At which component of the vapor compression cycle is energy removed?
Condenser
Does a dehumidifier tend to raise or lower the temperature of the room it is in?
Increases the air temperature because all the energy absorbed from the room at the evaporator plus the energy to run the compressor is put back into the room at the condenser
In which component of the vapor compression cycle is the pressure of the refrigerant high when it enters and leaves?
Condenser
In which component of the vapor compression cycle is the pressure of the refrigerant low when it enters/leaves?
Evaporator
What happens to the room temp and the components of the vapor compression cycle if the fan on the condenser of a vapor compression cycle breaks?
The temperature goes up in the room
The temperature and the pressure go up inside the system until it breaks
What is the best way to improve the efficiency of a vapor compression cycle?
Reduce the temperature at the condenser
Which uses more energy to run the condenser?
Water cooled is colder so it uses more energy
List the 6 components of the lithium bromide absorption cycle
- pump
- generator
- condenser
- evaporator
- absorber
- expansion valves
At what components in the lithium bromide absorption cycle is heat added to the cycle?
Generator
Absorber
Pump
At what components in the lithium bromide absorption cycle is the heat removed from the cycle?
Condenser
Evaporator
Where is the pressure high in the lithium cycle?
Pump
Generator
Condenser
Where is the pressure low in the lithium cycle?
Evaporator
Absorber
Where are the expansion valves located in the lithium cycle?
Evaporator
What draws water vapor from the evaporator to the absorber?
Lithium Bromide
What happens at the generator in the lithium cycle? What two products are generated and where does each go next?
Pressure from the evaporator is low
What happens in the lithium cycle absorber?
Water vapor is absorbed into the brine solutoin
What three components of the lithium cycle perform the same function as the compressor in the vapor cycle?
Pump
Generator
Absorber
What is the function of the pump?
Increase pressure
What is a swamp cooler used for and how does it work?
- Cools air
2. Water is whipped or sprayed into the air. Water evaporates pulling heat from the air, lowering the air temperature
What is a water cooling tower used for and how does it work?
Water is pumped to the top of the tower. Water then runs down the sides. Some of the water evaporates, pulling heat from remaining water lowering its temperature
