Factors Influencing Automotive Air Conditioner Evaporator Optimization 690131

On the basis of calculations from a computer program developed specifically for fin-tube coils cooling air by refrigeration evaporation, data are presented and discussed showing the effect of core design (tube diameter, tube arrangement, and core depth), and of operating limits (face velocity, air and refrigerant pressure drop) on “optimum” designs of automotive air conditioning evaporator coils at a typical operating point. Calculations are also made showing the effect of changing the operating conditions on the capacity of several core designs. It is shown that the “optimum” depends on many factors. The complex interaction of these factors makes the optimum for one specific car model or operating condition not likely to be the same as for another.