An air conditioning system operates on ideal vapor-compression refrigeration cycle using refrigerant 134a as the cooling fluid. The evaporator operates at 120kPa and the condenser operates at 1.4MPa. The system is to take in air at latm(101.3kPa) 35C, 70% relative humidity and flow rate of 25m3/min and deliver it at 24C and 60% relative humidity. The air first flows over the cooling coils of the evaporator, where it is cooled and dehumidified, and then over resistance heating wires, where it is heated to the desired temperature. The condensate is removed from the cooling section at 14C. Determine: a. The temperature of the air before it enters the heating section b. The amount of heat removed in the cooling section of the air conditioning system c. The amount of heat transferred in the heating section of the air conditioning system
An air conditioning system operates on ideal vapor-compression refrigeration cycle using refrigerant 134a as the cooling fluid. The evaporator operates at 120kPa and the condenser operates at 1.4MPa. The system is to take in air at latm(101.3kPa) 35C, 70% relative humidity and flow rate of 25m3/min and deliver it at 24C and 60% relative humidity. The air first flows over the cooling coils of the evaporator, where it is cooled and dehumidified, and then over resistance heating wires, where it is heated to the desired temperature. The condensate is removed from the cooling section at 14C. Determine:
a. The temperature of the air before it enters the heating section
b. The amount of heat removed in the cooling section of the air conditioning system
c. The amount of heat transferred in the heating section of the air conditioning system
d. The mass flow rate of the refrigerant in the cooling section
e. The power needed to operate the compressor in the cooling section if it operates with isentropic efficiency of 90%.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 9 images
