Using a simulation software to perform energy and exergy analyses of the sulfur-iodine thermochemical process

Abstract

The objective of this work is to demonstrate the utilization of the power of simulation tools to perform an exergy analysis of a process. Exergy analysis, being a new and useful thermodynamics tool, will be applied to one of the newest research fields in hydrogen production. One of the many advantages of computer simulation is elimination of the need to construct a pilot plant. Presently, extensive research is underway to come up with the production and use of clean fuels. The research entails performing pilot studies and proof of concept experiments using validated models. The research is further extended to various analyses such as safety, economic sustainability and energy efficiency of the processes involved. The production of hydrogen through thermochemical water splitting processes is one of the newest technologies and is expected to compete with the existing technologies. Among a wide range of thermochemical cycles, the sulfur-iodine (SI) thermochemical cycle process has been proposed as a promising technology for the production of hydrogen. In this research, we demonstrate how a commercial simulator can be used to perform an energy and exergy analysis of the SI water splitting process. Using a commercial simulator, a process flowsheet is developed based on research findings presented by other authors and an energy-exergy analysis is carried out on the process. The method of energy–exergy analysis used in this presentation indicates that an energy and exergy efficiency of 17% and 24% can be attained, respectively, in the conceptual design of the SI cycle.