It enables in conjunction with the accessory set 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
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.
Learning Objectives And Experiments
- Setup of different refrigeration circuits
- Design, operation and adjustment of components
- Evaporation pressure, intake pressure, capacity and refrigeration controllers
- Electric thermostat
- Manual valve as expansion element
- Post-injection valve
- Solenoid valve with coil
- Four-way reversing valve
- Power and auxiliary contactor
- Time relay
- Defrost timer
- Hot gas defrosting
- Read and understand technical drawings and operating instructions
- Fault finding
Specification
- Components for the setup of complex refrigeration circuits in conjunction
- 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 Specification
- 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
