Slide 1

Experiment 9 Evaporator Analysis & Coefficient of Performance

Slide 2

Ideal Refrigeration Cycle 1-2 Isentropic compression in a compressor 2-3 Constant-pressure heat rejection in a condenser 3-4 Throttling in an expansion device 4-1 Constant-pressure heat absorption in an evaporator

Slide 3

4. Evaporator 1. Compressor 2. Condenser 3. Expansion valve Set-Up Procedure 1.Turn on Fans 2.Expansion valve up to 45 mm in the rotameter scale 3.Wait 4 min 4.Record difference of pressure 5.Record temperature Shut-Down 1. Close receiver outlet V6 2. Wait 4 min and close receiver inlet V5

Slide 4

Outlet Pressure of Compressor P H (Psi) Inlet Pressure of Compressor P L (inch Hg, 1 inch Hg=0.491 Psi) Channel 102 Outlet Temperature of Evaporator T 2 (F) Channel 103 Inlet Temperature of Evaporator T 3 (F) Channel 104 inlet Temperature of Condenser T 4 (F) Channel 105 Outlet Temperature of Condenser T 5 (F) Channel 106 Discharge Temperature of Compressor T 6 (F) Channel 107 Suction Temperature of Compressor T 7 (F) Channel 110 (Volts) Volume Flow Rate : Channel 110 43.07 (ml/min) Voltage of the Compressor V (volts) Current of the Compressor I (ampere) Data to Record

Slide 5

Data Analysis 1. Follow the lab manual to do the data analysis. 2. Property tables of the refrigerant (HCFC-123) are available on Dr. Alvarados website: http://etidweb.tamu.edu/classes/entc370/