Refrigerant

Question 1

What is superheat?

Answer 1

The amount of heat added to a gas above its saturation point

Question 2

What is sub- cool

Answer 2

The heat removed from a liquid below it’s saturation point

Question 3

How do we find superheat

Answer 3

First convert suction pressure into temperature using PT chart. Then suction line temperature minus temperature evaporator saturation temperature

Question 4

How do we find sub – cooled

Answer 4

First convert discharge pressure into temperature using the PT chart. Then condenser saturation temperature minus liquid line temperature

Question 5

What causes the evaporator split and how do we calculated it

Answer 5

It happens because we absorb heat from the return air, it is the return air temperature minus the supply air temperature

Question 6

What causes the condenser split and how do we calculate it

Answer 6

It happens because we reject the heat from the condensing coil, discharge air temperature minus the outdoor air temperature

Question 7

What is saturation point

Answer 7

Where gas turns to liquid or liquid turns to gas