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| The ET 405 contains a hermetic compressor, 4 heat exchangers, 3 expansion valves and 4 different interchangeable capillaries. The unit can be operated in different modes. 11 manually operated valves allow corresponding changes to be made to the refrigeration circuit. The relevant measured values are displayed directly on indicator instruments. Therefore, sequences and consequences of switching operations within a cooling unit can be directly investigated. Sight glasses in the refrigerant circuit allow direct observation of the refrigerant status. A coaxial tube bundle heat exchanger can be operated as a counterflow condenser or as a parallel flow evaporator. This heat exchanger is used to heat or cool a glycol/water mixture circuit. Refrigerating loads are created by different fan speeds on the finned tube evaporators. |
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Learning Objectives / Experiments |
- Layout, function and main components of a heat
pump
- Measurement of relevant pressures, temperatures,
flow rates, current and voltage
- Illustration of the thermodynamic cyclic process in a
p-h state diagram
- Comparison of different operating modes
- Comparison of different expansion elements
(expansion valve, 4 capillaries)
- Determination of: efficiency, coefficient of
performance, specific compressor work,
compressor pressure ratio, specific cooling capacity
and specific refrigerating capacity
- Heat balance |
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Features
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* Air-to-water heat pump
* Heating and cooling
* High practical relevance due to use of standard
refrigeration engineering components
* 7 different modes, adjustable using 11 manually
operated valves |
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Alternative products
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ET 103 -- Heat Pump with Pumpdown Control
ET 104 -- Heat Pump with Dual Mode Evaporator
ET 422 -- Commercial Refrigeration Unit with Fault Simulation
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| Specification |
[1] Air-to-water heat pump for cooling and heating
[2] 7 different operating modes possible, adjustable using 11 manually operated valves
[3] Hermetic piston compressor, finned tube condenser, 2 finned tube evaporators
[4] Coaxial tube heat exchanger (refrigerant - water/glycol)
[5] Water/glycol circuit with 3.5ltr tank and circulating pump
[6] Refrigeration circuit with intake pressure regulator, sight glasses, pressure regulators, 3 thermostatic expansion valves, 4 different capillary tubes
[7] CFC-free refrigerant R134a
[8] 230V, 50/60Hz, 1 ph. or 120V, 60Hz, 1 ph. |
| Technical Data |
Compressor: power consumption 235W at
-10°C, refrigerating capacity: 580W at 5/32°C
Tube heat exchanger for R134a: Power: 1.6kW at
0°C, Δt=6K
Finned tube evaporator with fan: heat exchanger surface: 0.55m², power: 470W
Finned tube condenser with fan: heat exchanger surface: 1m², power: 750W
Capillary lengths: 300-500-1000-1500mm |
| Dimensions and Weight |
l x w x h : 1700 x 750 x 1600 mm
Weight : approx. 185 kg |
| Connections |
| 230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase |
| Scope of Delivery |
| 1 heat pump, complete, 3 capillaries 1 stopwatch, 1 graduated beaker, 2ltr, 1 combination wrench AF17, 1 pressurised air hose, 2m with hose clips (for filling tank), 1 instruction manual |
| Order Details |
061.40500 ET 405 Reverse Cycle Refrigeration Training System
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