Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Exergy Analysis of a Multipurpose CCHP Layout Based on Natural Gas Engines for Application in the Tertiary Sector
Submission Author:
Julian Esteban Barrera Torres , SC
Co-Authors:
Julian Esteban Barrera Torres, Edson Bazzo
Presenter: Julian Esteban Barrera Torres
doi://10.26678/ABCM.ENCIT2018.CIT18-0546
Abstract
This manuscript presents the main results of the exergy analysis of a cogeneration layout for supplying electric power, saturated steam, cold water for air conditioning, and sanitary hot water to a hospital facility located at the city of Florianópolis, Brazil. Firstly, some key concepts and general features of the exergy analysis are summarized and the power and thermal demands of the facility are presented. Once the maximum demands for each utility are identified, seven cogeneration scenarios are proposed based on the possible utilities’ combinations, as well as on premises commonly used by cogeneration experts. Results obtained from the exergy analysis of each scenario are compared with the efficiency calculated conventionally by the energy balance of the plant, showing that the balance between the amounts of steam and cold water delivered by the plant has the opposite effect over the energy and exergy performances of the plant. On the other hand, the exergy destruction rate calculated for the plant equipment presents the prime mover and the gas-water heat transfer as the operations with the greatest possibility of improvement. Finally, some insights are introduced regarding the practical limitations of the exergy-derived results and further exergy-based analyses.
Keywords
cogeneration, Exergy Analysis, Energy Efficiency, Tertiary Sector
