Cooling System Flashcards
What does SEER stand for?
Seasonal energy efficiency ratio
What is the amount of water vapor that an air-conditioning system must remove from air inside a house before the system can begin removing sensible load heat?
Latent Load
What is the amount of heat energy that an air conditioning system must remove from the air inside of a home because of the temperature of the air?
Sensible load
What is the minimum allowed SEER for most of the United States?
14
What is the seer rating on a older systems?
Ten
What are two air conditioning systems inspectors should disclaim?
Radiant cooling systems
and
absorption coolers
What kind of air-conditioning equipment may be encountered as refrigerators in off grid houses or any other places where electricity is difficult for costly to obtain?
Absorption coolers
Absorption systems use natural gas, propane, or renewable energy for fuel. They use ammonia as a refrigerant and an absorber in place of compressor.
Heat energy flows from someplace ____ going to someplace ______.
Hotter
Colder
Water vapor in the air flows (diffuses) from a place with _____ water vapor to a place with ______ water vapor.
More
Less
Can more water vapor exist in warm air than in cool air?
Warm
What is the stack effect?
Hotter air is lighter than cooler air and will rise
What takes a lot more energy?
1- To change matter from one state to another or
2- To raise the temperature of matter within a state.
One, to change matter from one state to another.
For example: solid to a liquid or liquid to a gas, (or vice versa)
What must be removed in order to change matter from a gas to a liquid and a liquid to a solid?
Energy
Energy must be (added or removed) to change matter from a solid to a liquid and from a liquid to a gas?
Added
The first step in the cooling cycle of an air conditioning system is…
The compressor receives cool gas refrigerant at low pressure from the evaporator coil.
In the cooling cycle of an air conditioning system what does the compressor do?
It changes the cool gas refrigerant at low pressure into a super heated gas and high pressure.
In the cooling cycle of an air conditioning system, liquid refrigerant flows in a liquid line _____ towards the evaporator coil.
Under high pressure
In the cooling cycle of an air conditioning system, what does the metering device do?
Reduces the liquid temperature and pressure and the some of the liquid flashes into a gas
In the cooling cycle of an air conditioning system, what happens to the liquid refrigerant in the evaporator coil?
The liquid expands as it flows through the evaporator coil tubes.
As a liquid in the evaporator coils expand, it absorbs heat from the air inside the house.
The absorbed heat causes the liquid to boil and changes into a cool gas at low pressure
When you see a reversing valve inside the condenser cabinet what does that infer?
That is a heat pump
In a heat pump air conditioning system, what roles do the condenser and evaporator play?
The roles are reversed depending on the heating or cooling cycle.
The outside condenser acts like an evaporator coil
The inside evaporator acts like a condensing coil
How long does it take a air conditioner to reach peak efficiency?
Ten to 20 minutes
If an air conditioning system is too large and is short cycling what function may not be performed?
Dehumidification
At What outside temperature should a inspector not test the air conditioner?
60 degrees or below
