All components of the heat recovery system are integrated and connected to generate the maximum amount of power from the waste heat source.

The heat recovery system requires a cooling system for proper operation and to avoid thermal collapse of the system. Thus, in Ciments Molins the prototype uses four fans to generate forced air.


Figure. Fan

Figure. WHRU


This generation device follows the same operating principle as any thermoelectric generation device: capture, generation, and dissipation.

An electrical cabinet houses the electronics and receives the electrical power generated by the system. In this cabinet, the power is treated to maximize its efficiency.


Figure. Cabinet diagram


The temperature must be controlled to ensure the proper operation of the system.


Therefore, two IoT nodes are installed inside the electrical cabinet, one to measure the temperature of the hot and cold side of the thermoelectric generator modules and the wall surface temperature. The temperature sensors are placed inside the WHRU and are connected to the IoT nodes installed inside the electrical cabinet. Another IoT node is installed to monitor the power generated by the system.


IoT nodes send the sensor data to a gateway via LoRa. In turn, the gateway that receives the sensor data from each IoT node sends them to the server through the Internet and displays them on the DAEVIS platform.


Figure. Electrical cabinet and gateway


Figure. Communication architecture



Figure. System configuration