Refrigeration PH Chart Qs

What is the unit of measurement for enthalpy on a Ph diagram?

• BTU/lb

• Kj/kg

• j/g

• Kj/g

What is the unit of measurement for pressure on a Ph diagram?

• Bar/gauge

• Pascal/gauge

• Bar/absolute

• Pascal/absolute

The refrigerating effect is

• The total cooling capacity of the system

• The amount of heat rejected from each kg of refrigerant as it passes through the condenser

• The amount of heat absorbed into each kg of refrigerant as it passes through the compressor

• The amount of heat absorbed into each kg of refrigerant as it passes through the evaporator

The heating effect is

• The total cooling capacity of the system

• The amount of heat rejected from each kg of refrigerant as it passes through the condenser

• The amount of heat absorbed into each kg of refrigerant as it passes through the compressor

• The amount of heat absorbed into each kg of refrigerant as it passes through the evaporator

The work done (energy input) is

• The total cooling capacity of the system

• The amount of heat rejected from each kg of refrigerant as it passes through the condenser

• The amount of heat absorbed into each kg of refrigerant as it passes through the compressor

• The amount of heat absorbed into each kg of refrigerant as it passes through the evaporator

Identify the refrigerant components from the Ph diagram below.

What point is the red dot ?

• Superheated vapour

• Bubble

• Sub cooled liquid

• Dew

What point is the Blue dot ?

• Superheated vapour

• Bubble

• Sub cooled liquid

• Dew