mat hematical model s of an air conditioning (A/ C)<br />evaporator and a ref rigeration evaporator in t he dual2evaporator ref rigerator cars were presented.<br />The simulation analysis and comparison of t he heat t ransfer and flow characteristics of R404A
<br />R22
and R134a were performed under A/ C and ref rigeration operating conditions. The result s<br />show t hat t he cooling capacity of R404A is a lit tle lower t han t hat of R134a but much higher t han<br />t hat of R22
and t he pressure drop of R404A is higher t han t hat of R22 but much lower t han t hat<br />of R134a under t he bot h conditions. R404A has good heat t ransfer and low pressure drop per2<br />formance
and can be used in lower ref rigeration temperat ure than R134a in t he dual2evaporator<br />ref rigerator cars system.<br />
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references
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