Tippawan P., Arpornwichanop A., 2016, Maximizing the Efficiency of a Heat Recovery Steam Generator for Solid Oxide Fuel Cell-Based Trigeneration Systems, Chemical Engineering Transactions, 52, 1051-1056.
In this study, a complete strategy for the optimum design of a heat recovery steam generator (HRSG) is outlined. The performance of the heat recovery steam generator is examined by modelling a trigeneration system based on an ethanol-fuelled solid oxide fuel cell in Aspen Plus. To maximize the HRSG efficiency, the performance of the HRSG at different steam product specifications is investigated in terms of the exergy efficiency and exergy destruction. The result shows that to minimize exergy destruction in the HRSG, the temperature difference across the HRSG should be maintained at a minimum and superheated condition should be avoided. Heat recovery steam generator with double pressure levels shows the maximum efficiency when utilizing 10 - 30 % of recovered heat for cooling application and employing the remaining heat for heating devices at nearly saturated condition.
