Hi! I’m currently doing a project that involves controlling a radiator valve. The project’s goal is to have a valve connected over Zigbee to some kind of controller that runs a PID and sends commands to the valve. The PID uses a setpoint sent by the user in an external dashboard, and a temperature sensor to measure the room’s current temperature. However, I’m having difficulty finding a valve that has Zigbee and allows me to control the opening value (50%, 30%, whatever). Can someone please help? I’ve looked into some examples like MOES BRT-100-TRV, but can’t find one that allows me to control the opening value of the valve. Thanks.
Radiator valves are not meant to use partial opening to control radiator temperature, so it is unlikely you’ll find one that does. The rate of flow for each radiator should be balanced with the other radiators so that the radiators heat up evenly and the difference in temperature between incoming and outgoing water is right. If it is not, then your heating will be inefficient. That is why the valve should be either open or closed. You can use modulation, as long as flow in the entire system is always possible. It must never happen that all valves are closed without a bypass.