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HTM 322 | Facilities Management > Cooling Systems > Flashcards

Cooling Systems Flashcards

1
Q

What are the components of a vapor compression cycle?

A
  1. Compressor
  2. Condenser
  3. Expansion Valve
  4. Evaporator
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2
Q

What is the function of a compressor?

A

Increase pressure

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3
Q

What is the state of the refrigerant entering and leaving the compressor?

A

In as a gas

Out as a gas

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4
Q

What is the function of a condenser?

A

Gas to a liquid

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5
Q

What is the state of the refrigerant entering and leaving the condenser? Why?

A

In as a gas
Out as a liquid
High pressure

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6
Q

What is the function of the expansion valve?

A

Reduce pressure

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7
Q

What is the state of the refrigerant entering/leaving the expansion valve?

A

In as a liquid

Out as a liquid

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8
Q

What is the function of the evaporator?

A

Liquid to gas (cooling coils)

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9
Q

What is the state of refrigerant entering/leaving the evaporator?

A

In liquid
Out gas
Low pressure

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10
Q

At which components of the vapor compression cycle is energy added?

A

Compressor and evaporator

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11
Q

At which component of the vapor compression cycle is energy removed?

A

Condenser

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12
Q

Does a dehumidifier tend to raise or lower the temperature of the room it is in?

A

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

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13
Q

In which component of the vapor compression cycle is the pressure of the refrigerant high when it enters and leaves?

A

Condenser

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14
Q

In which component of the vapor compression cycle is the pressure of the refrigerant low when it enters/leaves?

A

Evaporator

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15
Q

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?

A

The temperature goes up in the room

The temperature and the pressure go up inside the system until it breaks

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16
Q

What is the best way to improve the efficiency of a vapor compression cycle?

A

Reduce the temperature at the condenser

17
Q

Which uses more energy to run the condenser?

A

Water cooled is colder so it uses more energy

18
Q

List the 6 components of the lithium bromide absorption cycle

A
  1. pump
  2. generator
  3. condenser
  4. evaporator
  5. absorber
  6. expansion valves
19
Q

At what components in the lithium bromide absorption cycle is heat added to the cycle?

A

Generator
Absorber
Pump

20
Q

At what components in the lithium bromide absorption cycle is the heat removed from the cycle?

A

Condenser

Evaporator

21
Q

Where is the pressure high in the lithium cycle?

A

Pump
Generator
Condenser

22
Q

Where is the pressure low in the lithium cycle?

A

Evaporator

Absorber

23
Q

Where are the expansion valves located in the lithium cycle?

A

Evaporator

24
Q

What draws water vapor from the evaporator to the absorber?

A

Lithium Bromide

25
Q

What happens at the generator in the lithium cycle? What two products are generated and where does each go next?

A

Pressure from the evaporator is low

26
Q

What happens in the lithium cycle absorber?

A

Water vapor is absorbed into the brine solutoin

27
Q

What three components of the lithium cycle perform the same function as the compressor in the vapor cycle?

A

Pump
Generator
Absorber

28
Q

What is the function of the pump?

A

Increase pressure

29
Q

What is a swamp cooler used for and how does it work?

A
  1. Cools air

2. Water is whipped or sprayed into the air. Water evaporates pulling heat from the air, lowering the air temperature

30
Q

What is a water cooling tower used for and how does it work?

A

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

HTM 322 | Facilities Management (14 decks)

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