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

[Cathar]

OK. Got them now. They're lying, unless they've managed to change the laws of physics.

Their results are impossible.

Air @ 25C has a density of 1.169kg/m³
Air has a specific heat capacity of 1012J/kgC

Air therefore has a thermal capacity of 1.169 x 1012 = 1183 J/m³C

Air-flow through their radiator is 5m/s, with an orifice area of 0.13m x 0.24m

That's 5 x 0.13 x 0.24 = 0.156m³/s

Therefore, the thermal resistance of the air-flow is:

0.156 m³/s x 1183 J/m³C = 184.55 J/sC

A Watt is a Joule/sec

Therefore the thermal resistance of the air is 185.55 W/C, or inverting, a C/W of 0.0054186

i.e. for each watt of heat energy dissipated into the air, the air will warm up by 0.0054186C

Koolance claim a heat dissipation of 9.62kW, or 9620W

9620 x 0.0054186 = 52.13C

i.e. to dissipate that amount of heat, the air MUST have risen by 52.13C above the inlet air temperature.

So the exhaust air MUST be 24.46 + 52.13 = 76.59C

This is basic thermal physics here.

Here's the crunch part. Their results claim that the water discharge temperature is 56.20C

i.e. In a total breakdown of the laws of thermodynamics, the water discharge temperature has somehow managed to exit the radiator at 20C less than the air discharge temperature.

THAT is impossible.