Help w Thermodynamics of a Radiator/Fan System?
Help w Thermodynamics of a Radiator/Fan System?
(OP)
I am looking for help modeling a simple thermodynamic system representing a heat exchanger and a fan (as in a typical automotive arrangement, water to air). It doesn't need to be textbook, but I need something "close enough" to work for estimating the viability of different designs.
Some of the variables I'd like to adjust are the dimensions of the radiator (which affects Q but im unsure of the formula), the heat load input, the temperature of the water, the ambient temperature, and the CFM of air flowing through the radiator. I understand these systems follow curves and I guess I just need to solve for the balance point.
Any help is much appreciated..
thanks,
Steve
Some of the variables I'd like to adjust are the dimensions of the radiator (which affects Q but im unsure of the formula), the heat load input, the temperature of the water, the ambient temperature, and the CFM of air flowing through the radiator. I understand these systems follow curves and I guess I just need to solve for the balance point.
Any help is much appreciated..
thanks,
Steve





RE: Help w Thermodynamics of a Radiator/Fan System?
area*htc*delta_t
Beyond that, it's primarily refinement of the parameters
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Help w Thermodynamics of a Radiator/Fan System?
Cars have less 'serious' fans, for acoustic and cost reasons, and because if the underhood aero is done right, the fans can be switched off above a modest speed.
Because of that aero, e.g. how the air gets past the bumper, through the radiator, and out of the engine compartment, and presence and geometry of chin spoilers and such, you may find that your worst case situation is _not_ at max power output.
Mike Halloran
Pembroke Pines, FL, USA