Flashcards in Cooling Systems Deck (30)
What are the components of a vapor compression cycle?
3. Expansion Valve
What is the function of a compressor?
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
What is the function of the expansion valve?
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?
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?
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?
In which component of the vapor compression cycle is the pressure of the refrigerant low when it enters/leaves?
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
6. expansion valves
At what components in the lithium bromide absorption cycle is heat added to the cycle?
At what components in the lithium bromide absorption cycle is the heat removed from the cycle?
Where is the pressure high in the lithium cycle?
Where is the pressure low in the lithium cycle?
Where are the expansion valves located in the lithium cycle?
What draws water vapor from the evaporator to the absorber?
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?
What is the function of the pump?
What is a swamp cooler used for and how does it work?
1. Cools air
2. Water is whipped or sprayed into the air. Water evaporates pulling heat from the air, lowering the air temperature