Good afternoon.
I think it is important to make a table of real air flows (m3 / h or cfm) of each model of Asic (air-cooled) that we know. In this way we will be able to manufacture more efficiently our soundproof boxes for Asic.
The
"real" flow (at maximum regime) of refrigeration
nobody knows, and I tell you why.
The first thing we think is that it would be enough to look at the reference of the fan of that Asic that the manufacturer gives us and see what air evacuation data gives us. But this is not enough, it is a data for nothing reliable ... we must count on the resistance of the heatsinks and internal plates (of different sizes and configuration in each manufacturer and model) that directly reduce the flow. And there are more variables ... equipment with a only fan, there are with double fan, there are fan with 5000 rpm other with 6000 rpm or 7500 rpm, also equipment with fan input different from the output, ... and single-tube Asic and dual-tube Asic.
It would be interesting to know the real value of air movement of each team in its maximum regime (to make sure) of every Asic model. I have a cheap anemometer and because I do not have a measurement area as big as the fans, I do not trust the values.
I have seen that there is a measuring instrument that would work well, it is a balometer.
https://www.tsi.com/getmetafile/7b25020f-3844-4c43-ae5d-663df38b5e20/EBT731_03Normally used to measure airflow ducts accurately.
Imaginary case:
From my experience in D3, which is a team of "single tube" and double fan I have determined that for a diameter of helix of 10, 5 cm, which is about 86 cm2, it is necessary a tube for the extraction with a section of 200 cm2 about 16cm in diameter (with two meters in length) so that the equipment is almost not affected. If for example I wanted to design a box that included two Z11 (double tube of a single fan per tube) I could only rule by trial and error in the choice of the section of the evacuation tube, come on that first I have no chance to know with something of accuracy the tube section that I will need.
However ... if we had a table with the references of air extraction real and quite accurate if we could know the amount of asics of a given model that an extraction tube would be able to admit. Imagine that I do the measurement with the balometer in the D3 and it tells me that evacuates about 300 m3 / h and that to stabilize the equipment (based on trial and error) I previously determined that I needed a tube of 16cm in diameter (200cm2) so that would associate that volume with that section. Well imagine that the Z11 to be double tube but a single fan per tube extracted about 430 m3 / h (measured with our balometer) ... what tube would use? Applying the "logic" above apply a "rule of three" ... if for 300 m3 / h was needed 200cm2 for 430 m3 / h will be missing X. X = 430x200 / 300 = 286cm2. And as we intend to put two Z11 would be about 286x2 = 572cm2 what standardized soundproof tubes are for that section? ... of diameter of 25cm (490cm2) and the next 31,5cm in diameter (774cm2). In that case I would opt for the 25cm because it happens that increasing the diameter of a tube greatly reduces the contact surface of this with air and it is very likely that this is a sufficient section. But well this is a calculation of "fat brush".
With all this I think it would be very useful to have a list of "real" flows evacuated from the different Asics that are in the market. It is more ... it would not cost anything that was a data more than into the specifications given by the manufacturer on each model.
I know it is a difficult task for us ... a second hand balometer is worth 1100 euros ... but if someone who had one and was in this "world" would be ideal to be providing data.
A greeting.
Any idea or correction that comes to mind is welcome.
(I hope somebody thinks it's a good idea
)
