A MCDM Methodology to Determine the Most Critical Variables in the Pressure Drop and Heat Transfer in Minichannels

This paper proposes a methodology aiming at determining the most influent working variables and geometrical parameters over pressure drop heat transfer during condensation process of several refrigerant gases using exchangers with pipes mini channels technology. A multi-criteria decision making (MCDM) was used; this MCDM includes mathematical method called SIMUS (Sequential Interactive Modelling for Urban Systems) that applied to results 2543 tests obtained by designed refrigeration rig in which five different refrigerants (R32, R134a, R290, R410A R1234yf) two tube geometries were tested. allows us reduce computational cost compared use neural networks or other model development systems. research shows six out 39 better define simultaneously minimum drop, as well maximum transfer, saturation fluid entering condenser being important one. Another aim highlight new based on operation their application improve energy efficiency CO2 footprint derived minichannels.