Case study and reference design for geothermal energy. An Industrial Shields M-Duino 58 PLC reads pressure and temperature sensors on the heat pump manifolds, drives the pumps and valves, raises alarms and starts an emergency shutdown when needed, and stores operational data for preventive and predictive maintenance. The source does not name a plant or a customer.

The PDF covers the challenge, the three loops (regulate, protect, record and connect), the system architecture with the signal list and the hardware used. Interactive version: geothermal heat pump case study online.