Koolance's Response to Hardware Labs "The Copper Radiator Myth"

[jtok202]

Completely, utterly, and totally irrelevant.



I took the time to calculate the actual air-flows:

PA120.2 => 324CFM
HWLabs GT240 => 318CFM
Koolance => 330CFM

So, these are all 2x120mm fan radiators. That means to achieve that sort of air-flow, we'd need to be pushing ~160CFM actual, through the radiator, with each fan.

What sort of fan could do that you ask? 160cfm @ ~110Pa (~0.45in H2O).

Found one!

The Delta TFB1212GHE. This lovely little number is a 220CFM fan, running at a delightfully pleasant 65.0dBA. I have one of these fans at home. They are freaking insanely loud.

Make absolutely no mistake. This is marketing/advertising crap at its total sleaziest worst.

It is of absolutely zero secret that the design for the PA120 series has its efficiency falling away rapidly with the use of fans of >100cfm rating. Above 130cfm fans the PA120 radiators really don't benefit from any extra airflow at all.

This is Koolance purposely choosing the "weak-points" in competing designs, and constructing an artificial test that obfuscates the full disclosure of the fan power and noise required to attain the air-flow levels demonstrated in their tests, and then has the audacity to claim technical superiority.

Once again we see sleazy marketing practices at their worst brought to play against competitors, and targetting the uninformed consumer who will blindly swallow complete tripe all because it "looks official".

It's nothing more than tarted up pig swill with a pretty ribbon on top.

Thank you for doing all the math minutes before I had finished it After reading both letters there is a couple of things that I would like to have explained, If the Ventilation Resistance (Pa) of the Koolance HTE-NX004P (100% Aluminum) is at a greater value than that of the ThermoChill PA120.2 (Brass/Copper) even thought it has a size of exactly 1,306,620 mm^3 / 586,560 mm^3 or 2.27 times greater isn't the Koolance unit more restrictive to air flow. At a rating of 115 kg/m*sec^2 it has a pressure drop of .016 psi.In passing through the radiator at worst that means that the pressure drop of the same amount of area of a ThermoChill is going to be approximately half of that.
f you do the math on the Airflow of the system.... MY math
(fyi kg/m*sec^2= PA = N/s^2)

A turbine like that puts out a "Air Velocity: 5.0 meters per second" which is equivalent to the velocity of the air times the diameter of the aperture to obtain a flow rate, In the case of the Thermochill it would be 5.0meters per a second X .132 X .255 x2119 of air. (converted mm to meters to preserve units.) yielding
5.0 m/s x .132 m x .255 m = .1683 M^3/S
Convert to CFM, because thats what our fans are rated at.
.1683x2119=357CFM

Now for the equivalent koolance unit.
5.0 m/s x .130 x .240 = .156 M^3/S
.156x2119=331 cfm


If none of my math is greviously wrong then this would show a koolance radiator is not going to be significantly more restrictive than a Thermochill.
at 300+CFM OF AIR. which is a ludicrous amount of air. Now for the fun part how many pounds of pressure a 300+cfm fan puts out, to the interwebs.

Gathered from a hovercraft site.
DYNAMICS
Gross hull weight 2,727 Lbs
Engine Frames & Props 1,600
24 People @ 190 ea. 4,560
100 Gal Fuel @ 7 lbs/gal 700
Gross Weight 9,587 Lbs

Static pressure (9,587/800)/5.2 = 2.3 inches W.G. SP

LIFT
120 ft. perimeter @ 10 cfs/ft = 600 cfm/ft = 58,200 cfm
One Fan - Joy Vane-axial.....45 inch diameter, 17 inch hub
@ 2000 RPM 64,000 cfm @ 4.5 inches WG
85 HP consumption

If i understand right for a weight of 9,587 lbs that takes up 120ft. they need 600 cfm of air per a foot so if we have a weight of 9,587 lbs/120 ft =79 lbs/ft we can say that under ideal circumstances a 300 cfm air fan would be able to hold half of that or a wopping 39.5 pounds of weight per a ft of area. Ya this test is realistic.
P.S. thanks for correcting me Cathar forgot for a while that this was a two fan setup as i was dealing with one turbine to calculate.