ARHYOSA™ Project Prototype

The project included the configuration of three successive incremental prototypes installed and set up by MYWAI at the project partner Ansaldo Green Tech. The setup required the presence of an EDGE device interfaced via OPC-UA with the electrolyzers to enable real-time monitoring of the sessions. In this way, the system allowed the visualization and analysis of critical operating variables and the identification of potential anomalies, providing a detailed overview of system performance.

The main functionalities enabled by the prototype allowed, in particular, the following actions:

Monitoring and Classification of Power Ramps
The system is capable of tracking and analyzing the power ramps absorbed by the electrolyzers, both during increase and decrease phases.
The ramps are classified into different bands based on the rate of variation relative to the nominal power of the electrolyzer (estimated by multiplying the number of cells by the nominal power of a single cell, approximately 5 kW).

Monitoring of Detailed Operating Variables
The system enabled real-time visualization of the following variables, essential for early diagnosis of anomalies:

• Electrical Current: Monitoring of the output current from the stack and production current.
• Temperature: Monitoring of inlet and outlet temperatures of the electrolyte, as well as the temperatures of individual cells. High temperatures (typically above 50°C) are a common cause of membrane degradation.
• Flow Rates: Analysis of electrolyte flow rates entering the stack (FT600 and FT610, such as S0_GVL_SCADA.HIOD_610.Value and S0_GVL_SCADA.FQT_600.Value). These parameters affect sealing quality, fluid dynamic performance, and thermal exchange control.
• Cell Voltage: Detailed monitoring of the voltage of each individual cell (VM_001 to VM_005, and VM_TOTAL), enabling the identification of increases in ohmic resistance or overvoltages due to electrode degradation.