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AngryAlpaca · 07-09-2004, 10:03 PM

I assumed 80CFM but that's horribly wrong. It'll be around half that.

Now, 40CFM is 1.13267386 m^3/minute or 1132.7lpm, and the heat of a system is around 12000J/minute

The heat capacity of air is 1.005kJ/kgC and the density is 1.29kg/1000L so the mass of the momentary flow is 1.46kg. 1.46*1.005 = 1.47kJ for each degree of temperature rise. 12000/1470 = 8.2C

Umm... That's a useless number.

Ok, let's try it again. The volume of a heater core is 1.18L and the air is recycled 960 times per minute. 8.2C/960 times = a temperature rise of 0.00854C across the radiator. The second radiator is 0.0085C warmer.

Did I do that wrong or does anyone have any theory or testing showing otherwise?

I think series is fine if that's correct.

07-09-2004, 10:03 PM	#13
AngryAlpaca Cooling Savant Join Date: Jan 2004 Location: Alberta Posts: 631	I assumed 80CFM but that's horribly wrong. It'll be around half that. Now, 40CFM is 1.13267386 m^3/minute or 1132.7lpm, and the heat of a system is around 12000J/minute The heat capacity of air is 1.005kJ/kgC and the density is 1.29kg/1000L so the mass of the momentary flow is 1.46kg. 1.46*1.005 = 1.47kJ for each degree of temperature rise. 12000/1470 = 8.2C Umm... That's a useless number. Ok, let's try it again. The volume of a heater core is 1.18L and the air is recycled 960 times per minute. 8.2C/960 times = a temperature rise of 0.00854C across the radiator. The second radiator is 0.0085C warmer. Did I do that wrong or does anyone have any theory or testing showing otherwise? I think series is fine if that's correct.