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Products  |  Thermodynamics, Heating and Sanitary Systems  |  Refrigeration and Air Conditioning  |  ET 351
ET 351 Refrigeration Cycle with Open Compressor Show data sheet (pdf file) Print page
Technical Description
The heat transferred to and from a refrigeration circuit can be investigated with this compact benchtop unit. The evaporator contains two electrical heaters that are used as a cooling load. The motor torque for the open compressor is measured using a spring balance. The heat dissipated can be determined by measuring the temperature change and flow rate of the cooling water. An environmentally friendly refrigerant is used.
A supply of cooling water is required.
Learning Objectives / Experiments
· Performance under cooling loads
· Energy balances at evaporator and condenser
· Calculation of the motor power via speed and torque
· Coefficient of performance
Features
Water-cooled evaporator with cooling coil, collector function, and sight glass
Compact system with torque measurement
Variable cooling load
Alternative products
ET 165 -- Experimental Module Refrigeration System
Specification
[1] Heat transfer to and from a refrigeration circuit
[2] Open compressor with drive motor
[3] Condenser with cooling coil, collector and sight glass, 1300W
[4] Tubular evaporator with 2 adjustable heaters as cooling load
[5] Motor torque determined via spring balance
[6] Temperature sensors with selector switch and display, displays for current and voltage, flow meters
[7] HP pressostat and temperature limiter
[8] CFC-free refrigerant R134a
[9] lxwxh: 1200x620x1218mm, 90kg
[10] 230V, 50Hz, 1 phase
Technical Data
Compressor: 500rpm, refrigerating capacity: 550W at -10/20°C suction temp., displacement: 2.26m³/h; Drive motor: 370W, 1500rpm
Heater: 2x 750W
Measuring ranges:
- Voltmeter: 0...230V, Ammeter: 0...10A
- speed: 0...10000rpm
- temperature: -20...200°C
- pressure: -1...9bar / -1...24bar
- spring balance: 0...50N
- flow rate (water): 4...51g/s
- flow rate (R134a): 1.2...16.2g/s
Dimensions and Weight
l x w x h : 1200 x 620 x 1218 mm
Weight : approx. 90 kg
Connections
230V, 50Hz, 1 phase
Water connection
Scope of Delivery
1 complete unit
1 instruction manual
Order Details
061.35100 ET 351 Refrigeration Cycle with Open Compressor
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© 2005 G.U.N.T. Gerätebau GmbH