(57ag) An Integrated Approach of Safety, Sustainability, Reliability, and Resilience Analysis Via a Return on Investment Metric: A Compressor System Case Study

Process design and technology selection are driven by multiple of objectives including technical, economic, environmental, safety, and resilience drivers. Traditionally, techno-economic analyses have been used to select and optimize process design. Subsequently, environmental, safety, and resilience issues have been included in post-design analysis. With the recognition of the importance of including the various objectives during the early stages of process design, there has been a growing interest in develop systematic methods for multi-objective conceptual design. Recently, novel concepts have been proposed for the incorporation of sustainability and safety in design through financial frameworks. In the current work, an extended approach is proposed for the incorporation of reliability, resilience, safety and sustainability aspects during the conceptual design of the process system. In this proposed methodology, safety and sustainability weighted return on investment metric (SASWROIM) is extended to include impacts of resilience and reliability aspects with different design changes and configurations. For this purpose, a safety, sustainability, reliability, and resilience weighted return on investment metric (S2R2WROIM) is introduced. A multi-objective decision making can thus be carried out for the optimal design based on this augmented method over the convention economic return on investment metric. The general methodology to screen process alternatives through S2R2WROIM begins with the synthesis and simulation of base case and alternative cases flowsheet in Aspen Hysys. This is followed by performance analysis, evaluation of various metrics, and application of integrated metric to select the recommended design. A compressor process system case study in a hydrocracking process plant is demonstrated to illustrate the application and benefits of the proposed methodology. The new approach provides the decision makers with meaningful information and insights about safety, reliability, resilience, and sustainability along with the economic aspect.