Make complex changes of state in the otherwise closed piping systems of refrigerating plants visible and tangible. With the aim of creating a memorable concept of the theoretical comparative process through the positions of the components and pipes, this trainer makes an important contribution to the recognition of technical analogies in real plants. In refrigeration plants, the cooling effects are used for cooling. If the heat system is used to produce heat, this is known as a heat pump.
The ET 380 trainer provides an insight into the process of phase change and creates a didactic bridge to the theoretical comparative process, the log p-h diagram.
All relevant measured values are captured by sensors. The simultaneous transmission of the measured values to a PLC enables easy analysis and the representation of the process in the log p-h diagram. The PLC provides accurate data on the condition of the refrigerant, which is used for the accurate calculation of the refrigerant mass flow. The calculation therefore provides a much more accurate result than measurement with conventional methods. The touch screen displays the main characteristic variables of the process, such as the pressure ratio of the compressor and the coefficient of performance.
The trainer is controlled by a PLC via touch screen. By means of an integrated router, the trainer can alternatively be operated and controlled via an end device. The user interface can also be displayed on additional end devices (screen mirroring). Via the PLC, the measured values can be stored internally. Access to stored measured values is possible from end devices via WLAN with integrated router/ LAN connection to the customer’s own network. When using a direct LAN connection, the measured values can be transferred to a PC and read out and stored there (for example with MS Excel).
