Hi !
I wish to carry out a management system of central heating (radiators only) with standard KNX (Bus TP1 or IP - not RF).
The gas (condensing) boiler would be controlled via the an external sensor for the curve of heating and via a 0-10 Volts DDC for the modulation of the burner.
The building (private - around 450 m²) will be divided into approximately 10 zones laying out, each one, one KNX thermostat (with management of a weekly program, events and modification of the temperature on zone) and one or more electromechanical valves.
To obtain an ideal modulation of the burner (and to avoid the inopportune phenomenon START-STOP of the burner) according to the energy load required by the building, it would be useful to be able to measure the total request and to defer it on a scale of 0 to 10V to a DDC output.
It would thus be necessary to be able:
* to repatriate the following data from the thermostats:
- t° measured in the zone: t
- t° wished in the zone: T
with ΔT (≥0) = T-t --> ΔT01… ΔT0X… ΔT10
* to integrate a coefficient of importance for each zone: I (e.g.: 15 m ² or 150 m ² - proportional to the calculation of thermal losses)
* to integrate a coefficient of priority for each zone: P (e.g.: bathrooms/computer room vs WC of the cellar)
A module of calculation with 0-10V output (Supervision Module + Output ?) would produce and send a value (≤ 10):
DDC (V) = [[(ΔT01). P.I] +… + [(ΔT0X). P.I] +… + [(ΔT10). P.I]]
if DDC (V) > 10 --> DDC (V) = 10
(e.g.: DDC (V) = 7 --> 7V sent on DDC entry of the boiler --> burner load = 70%)
Consequently, could you indicate me which material could be, according to you, an answer to my technical needs ?
Thank you,
JLR.
I wish to carry out a management system of central heating (radiators only) with standard KNX (Bus TP1 or IP - not RF).
The gas (condensing) boiler would be controlled via the an external sensor for the curve of heating and via a 0-10 Volts DDC for the modulation of the burner.
The building (private - around 450 m²) will be divided into approximately 10 zones laying out, each one, one KNX thermostat (with management of a weekly program, events and modification of the temperature on zone) and one or more electromechanical valves.
To obtain an ideal modulation of the burner (and to avoid the inopportune phenomenon START-STOP of the burner) according to the energy load required by the building, it would be useful to be able to measure the total request and to defer it on a scale of 0 to 10V to a DDC output.
It would thus be necessary to be able:
* to repatriate the following data from the thermostats:
- t° measured in the zone: t
- t° wished in the zone: T
with ΔT (≥0) = T-t --> ΔT01… ΔT0X… ΔT10
* to integrate a coefficient of importance for each zone: I (e.g.: 15 m ² or 150 m ² - proportional to the calculation of thermal losses)
* to integrate a coefficient of priority for each zone: P (e.g.: bathrooms/computer room vs WC of the cellar)
A module of calculation with 0-10V output (Supervision Module + Output ?) would produce and send a value (≤ 10):
DDC (V) = [[(ΔT01). P.I] +… + [(ΔT0X). P.I] +… + [(ΔT10). P.I]]
if DDC (V) > 10 --> DDC (V) = 10
(e.g.: DDC (V) = 7 --> 7V sent on DDC entry of the boiler --> burner load = 70%)
Consequently, could you indicate me which material could be, according to you, an answer to my technical needs ?
Thank you,
JLR.