DESIGN OF TRIGENERATION SYSTEMS - PROCESS INTEGRATED APPLICATIONS OF ENERGY-CONVERSION DEVICES IN CHEMICAL-PLANTS

In the conceptual design of trigeneration systems, which combine the p roduction of chemicals, power, and heat, an energy conversion device i s considered a chemical plant's unit operation. A method is presented whereby options can be identified for the integration of such devices in chemical plants. Firstly, all functions of the energy conversion de vice must be described. Secondly, the functions of the auxiliary equip ment present in a stand-alone power system must be summarised. Third, a chemical process has to be selected which can perform some of the fu nctions of the power system's auxiliary equipment. The integration of a fuel cell in a methanol plant illustrates the application of the met hod.