1998-02-01

Cooling System Performance Evaluation 980431

With the ever increasing demand on automotive manufactures to reduce lead times, improve performance, add air conditioning, meet noise and pollution legislation the need to evaluate and improve cooling system performance at the design stage is becoming increasingly important. The cooling system is taken to encompass the full air path of grills, inlet plenum, cooling pack, under bonnet resistance and outlet to the free stream.This paper describes the main structure of a PC based computer program which is being developed to permit the cooling system performance to be optimized at the vehicle concept stage or prior to major updates to a model, which could be for example front end styling or a change of engine. Also discussed are details of how the air paths through the cooling pack, and the system resistances from the inlet grill to the engine compartment outlet are determined.

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