Vapor Compression Refrigeration System — MOE Lab Tender Details

Vapor Compression Refrigeration System for Thermodynamics Lab Equipments

Objectives of the experiment:
 
1. Demonstration of the basic refrigeration cycle
2. Plotting pressure-enthalpy diagram from the measured values of pressure and temperature
3. Calculation of actual COP, cycle COP and Carnot COP
4. Calculation of volumetric and isentropic efficiencies of the compressor
5. Calculation of overall heat transfer coefficient of evaporator and condenser
 
Technical Specification:  
 
a) REFRIGERANT : R-134a / Hydrocarbons  
 
b) HERMETICALLY SEALED COMPRESSOR  
 
Capacity : 0.5 TR at 7oC evaporator 54oC condenser temperature)
 
Type : Reciprocating / Rotary
 
c) AIR COOLED CONDENSER  
 
Type : FORCED CONVECTION AIRCOOLED Multi row fin and tube type
 
d) CONDENSER COOLING FAN    
 
Type : Forced Draft, axial flow
 
e) WATER COOLED TYPE EVAPORATOR  : Shell and coil type with SS tank with Insulation, top cover and stirrer with motor
 
f) INSULATION FOR WATER TANK  :  PUF
 
g) VARIATION OF LOAD AT EVAPORATOR : 1 kWimmersion heater provided with variac
 
h) EXPANSION VALVE : Thermostatic expansion valve & Capillary tube (In parallel)
 
i) THERMOSTATIC EXPANSION VALVE :  1 NO.
 
Make : Danfoss / Sporlan  
Type : Straight charged with Internal equalizer type   
 
Solenoid valve for TEV : Danfoss / Sporlan
 
ii) CAPILLARY TUBE :  1 NO.
 
i) REFRIGERANT FLOW MEASUREMNT :  1 No
 
Type : Rotameter
Range : 5 to 50g/s
Accuracy : 1 g/s
j) HAND SHUT OFF VALVES: Before and after each component
Make : Danfoss  
k) FILTER DRIER :  1 NO.
Make : Danfoss/Sporlan  
l) PRESSURE GAUGE : 1 No. (at the inlet to the condenser)  
Type  : Bourdon  
Range :  0 to 300 psig  
m) COMPOUND GAUGES :  1 No. (at the inlet to the compressor)
Type : Bourdon
Range : -30 “ Hg to +150 psig  
n) HP/LP CUTOUT     :  1 NO.
Range      : -30” Hg to 300 psi  
Make and model   : Danfoss/Sporlan  
o) DUAL TYPE DIGITAL WATT METERS FOR COMPRESSOR AND ELECTRICAL HEATER
Range :  0 to 3000 watts,single phase
Watt resolution    :  1 watt  
Type :  2 RMS  
Isolation :  Electrically isolated   
No. of displays    :  one, 4 digit
Computer connectivity   :  through RS485 port on back panel.
Power :  230V±20% ac, 50Hz.
Operating temperature   :  0-50°C  
p) DIGITAL TEMPERATURE INDICATOR  : 1 set   
Temperature range : -30  to 199.9oC Resolution :  0.1oC Type of sensor :  k-type thermocouples. No of channels : 8 channel  No. of displays :  one, 4 digit
Power :  230V±20% ac, 50Hz.
Operating temperature   :  0-50°C  
Temperatures to be measured and indicated are:
1) Evaporator outlet,
2) Compressor inlet,
3) Compressor outlet,
4) Condenser inlet,
5) Condenser outlet,
6) Evaporator inlet,
7) Temperature of water in evaporator tank,
8) Compressor shell temperature