Energy-saving cooling is possible, using the free-cooling technique and a differential temperature controller.
Free cooling is a cooling system that take advantage of the lower external temperature to reduce the temperature of an environment without the need for refrigeration machines.
Like, on summer evenings, when house’s windows are opened to let the coolness enter.
The solutions used in the commercial and industrial fields are many and exploit the heat exchange not only between air but also between liquids.
This technique is used in many areas such as in data processing centers, commercial structures, gyms, and so on. , but it is also spreading more and more in the civil sector thanks to the relatively simple technology, low maintenance and considerable energy savings.
To control the temperature of a system, with the free cooling technique, a controller capable of measuring the internal and external temperature is indispensable.
Based on the temperature difference with the outside, the controller can then activate an exchange system (such as mechanical ventilation) to lower the internal temperature.
Ascon Tecnologic Y39D, W09D and K31D controllers can be configured to measure two temperatures (internal and external) and one or more outputs through which to control the actuators.
If the external temperature is lower than the internal one, i.e. there is a temperature difference greater than the programmed Set Point value, the instrument activates the regulation output which, by commanding a fan (or a damper or a fan + damper), will cool the internal environment.
While the fan is running, the temperature measured by the probe placed inside will therefore tend to decrease.
When the difference established by the Set Point is reached, the output will be switched off stopping the air exchange.
Through the alarm thresholds it is also possible to perform any action on the system such as, for example, interrupting the control output if the external temperature is too cold or enabling the differential regulation only within a set temperature band or other possible combinations.
The K31D model also allows for PID-type differential control and can also be provided with 0/4 … 20mA or 0/2 … 10 V analogue outputs.
In conclusion, the differential temperature controllers allow you to control ecological, energy-saving and low-maintenance cooling systems by exploiting the free cooling technique.
Write to info@ascontecnologic.com for an offer.
