enertec-sm

For controlling the environmental temperature in the home there are two possibilities:
· control using a thermostat
· control by PLC

The first possibility uses a wall thermostat which commands a given area in the home. This thermostat commands either directly or by relay (if the panels to be piloted are more than 3) the electricity of the Radiel using the on/off system.

This means that at the planned temperature, the thermostat blocks the electricity of the Radiel and then restores it when the room temperature lowers.
With this system, as can be seen in the diagram 1, the room temperature is not stable and linear, but follows a sinusoidal curve. That is because when the thermostat stops the electricity, the energy stored in the stone continues warming the environment for a time thus raising the temperature. However, when the environment loses temperature and the thermostat reactivates the plates, due to their thermal ability, they employ a certain time to reheat to a level that enables heat to be radiated, therefore the temperature of the environment still lowers slightly before rising again.

The second and more efficient possibility, foresees the management of the temperature through programming with PLC and relative power card.
Every room is provided with a probe PT100 inserted into an electrical socket of the plant, which records the temperature. The signal is sent to the monitor, with a specific software, that is programmed to manage, through the special card, the amount of power applied to the Radiel.
In this case the electrical current is not switched on/off, but the power of the plates is modulated in function of the precise thermal demand. The planned temperature, the actual temperature and the percentage of power applied at that moment in that room, are visualized on a touch-screen monitor of 5,7" colour or black and white (see the images below) that can be positioned, at the discretion of the client, for easy control and programming.

This system permits the autonomous management of every single room, both of the temperature and of the timing schedule.
It permits a linear temperature (not sinusoidal as in the previous case), that is constant in each room. See diagram 2.
It supplies only the energy that is dissipated from the residence, depending upon the thermal isolation, favouring a saving of at least 10% on consumption, thanks to better efficiency.
It gives the possibility of keeping under constant control the temperature of every room with the relative power applied at that moment.