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Dynamic Behaviour of Thermostatic Radiator Valve (TRV)
I have a new task about thermostatic radiator valves and have difficulty in finding the dynamic behaviour of the thermostatic radiator valve. In detail: I can find the kv value for the set values (the numbers on the TRV) but I cannot find the change of kv (the opening change) as according to the indoor temperature at any time. In another words, I need to find what the flow will be at different set values of TRV (for example the no 3 that is in between 1 and 5 numbers) and at different indoor temperature conditions (for example at start up of heating the indoor temperature will be 10degreeCelcius together with during the continuous operation control dynamics of TRV).
The technical specifications by the TRV producers do not include this (kv or flow change) at partial behaviour conditions according to the set number values, right? If not, how can I find this relationship (kv according to TRV set no and indoor temperature value during operation)?