Environmental Control System Simulation using EASY5, as Applied to the F-14

The Naval Air Development Center has developed a thermal model of the F-14 Environmental Control System (ECS) using the EASY5 dynamic anaysis computer program. In addition to discussing the modeling effort, this paper also details several improvements made to the EASY5 program in an attempt to improve its accuracy, flexibility, and computational stability. Also highlighted is a simplified version of the F-14 EASY5 ECS model which is being used to conduct trade studies and to calculate the initial conditions required to run the EASYS program.