With this article I intend to use a ratio practically forgotten and that can get us out of trouble when we are selecting air conditioning equipment to condition a space.
Thermal Load
In the best of cases we will have made a calculation of thermal loads of the space we want to condition.
Sensitive Cooling Power
If we have a medium level, we will surely have selected the specific team based on the refrigeration power sensitive.
Circulations
At this point we move to the expert level, it is not enough to ensure that our air conditioning equipment is capable of combating the thermal load of the premises, we must ensure that problems such as:
- Stratification.
- Air currents.
It is clear that with a correct selection of the diffusion system These factors can be mitigated, however, my advice is that before addressing it you verify that the hour circulations They have a reasonable value.
The circulation hours are obtained by dividing the delivery flow of the equipment due to the volume of the space that we intend to air-condition; Once the value is obtained, we move on to the analysis:
- If the circulations are less than 8, we run the risk of stratification occurring: The flow rate of the equipment is very small compared to the volume we want to air condition.
- If the circulations are greater than 12 we run the risk of generating air currents: The flow rate of the equipment is very large compared to the volume we want to air condition.
He optimal value of circulations is 10, although we can move in the range 8 – 12.
Conclusion
We have to pay special attention to circulation when we air-condition the space. large volumes or with a high thermal load density, since if we do not analyze its value we run the risk of stratify in the first case or to generate large air currents In a second.
As I suppose many of you are thinking, this is resolved with CFDs, but as I always tell my students we must never forget the ratios, the boards and the agile calculations.
I hope it has been useful to you
