Refrigeration components for advanced experiments ET 910.11

Refrigeration components for advanced experiments

Type: ET 910.11
Name: Refrigeration components for advanced experiments


ET 910.11 enables in conjunction with ET 910, ET 910.10, ET 910.05 and the accessory set ET 910.12 the performance of advanced experiments related to refrigeration.

Commercial components are used in practical experiments. These components are mounted on plates ready to be connected and are arranged clearly in the frame of ET 910.05.

The set includes complex refrigeration components, such as capacity controller, intake pressure controller, defrost timer, four-way reversing valve and refrigeration controller. The four-way reversing valve, for example, is used to reverse the circuit. This allows for the defrosting of an iced-up evaporator by operating it temporarily as condenser. Manometers provide an insight to the pressure ratios in the refrigeration circuit.

Via pressure and temperature measurements the changes of state of the refrigerant can be tracked and entered into the log p-h diagram. The temperature is measured by interlaboratory thermometers.

Technical details

  • components for the setup of complex refrigeration circuits in conjunction with ET 910 and ET 910.10
  • post-injection valve
  • refrigeration controller with PTC sensor
  • defrost timer, timing interval 30min
  • time relay
  • four-way reversing valve, solenoid valves
  • electric thermostat as temperature controller
  • power and auxiliary contactor
  • Technical data

    Rated controller capacity at t0=-10°C, tc=25°C

    • evaporation pressure: 2,8kW at Δp=0,2bar
    • intake pressure: 5,3kW at Δp=0,2bar
    • capacity: 4,8kW at offset=0,7bar

    Thermostat: -5…35°C
    Refrigeration controller: -40…110°C
    Post-injection valve: -45…35°C
    Time relay

    • response delay: 0,05s…100h

    Setting ranges

    • evaporation pressure controller: 0…5,5bar
    • intake pressure controller: 0,2…6bar
    • capacity controller: 0,2…6bar
    Dimensions and weight

    Plate height: 297mm
    Weight: approx. 25kg