Heat Exchanger Performance is a powerful, user friendly, program for the analysis of two types of Heat Exchangers: Shell & Multi-Tube Exchangers, and Double Pipe Exchangers. In either case, the tubes are of the bare-tube type. The program will analyze the performance of a known heat exchanger: Given the flows and inlet temperatures of the Tube-side fluid and the Shell-side fluid, the program will predict the exit temperatures of both fluids and the total heat exchanged.