Author: Alex Valdes 
Stewards: Jian Gong, and Fengqi You
Heat exchangers are necessary process units that are part of any detailed process flow diagram. Process streams commonly interact through heat exchangers in order to save money on heating and cooling utilities. Furthermore, the surface area of the heat exchanger is proportional to the amount of heat that can be transferred and is the most indicative cost component of a heat exchanger. Therefore, all of the commercial simulators include models for heaters, coolers, heat exchangers, fired heaters,and air coolers . Typically, the only inputs necessary for heat exchanger models to converge are properly specified inlet streams (flow rate, temperature, pressure, composition), the pressure drop of the shell and tube, and the outlet temperatures (or the duty).
- G.P. Towler, R. Sinnott. Chemical Engineering Design: Principles, Practice and Economics of Plant and Process Design. Elsevier, 2012.