A procedure to analyse airflow in automotive air-conditioning systems in an early stage of design

摘要

A procedure for a computer-aided analysis of the airflow in the entire automotive air-conditioning system is introduced. The system is modeled as a one-dimensional network of flow resistances. We analyzed four typical operating modes of the air-conditioning system at different flow rates. Only rough CAD data were necessary to build the models. Results are obtained in terms of resistance curves, operating points, flow distributions at the outlets, and local pressure losses. Once the models are set up, sensitivity analysis is used to examine critical components or design modifications very rapidly.