Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Thermodynamic Analysis of a Trigeneration System Integrated with Water Steam or Organic Rankine Cycles
Submission Author:
Thalyta Stefani Amâncio Santiago , SP
Co-Authors:
Thalyta Stefani Amâncio Santiago, Ana Elisa Achiles, José Vicente Dangelo
Presenter: Thalyta Stefani Amâncio Santiago
doi://10.26678/ABCM.COBEM2019.COB2019-0638
Abstract
Trigeneration systems combine the production of cooling, heating and power utilities obtained from one primary energy source. This thermal integration is one of the ways to decrease global primary energy consumption and greenhouse gas emission. Conventional trigeneration systems consist of a Brayton cycle, followed by a heat recovery steam generator (HRSG) and finally an absorption chiller. In this work, two different configurations of a trigeneration system were studied, evaluating their thermodynamic performance. These systems differ from each other by the inclusion of a second power cycle, after the absorption chiller, which is a Rankine cycle operating with water (SRC) or an organic fluid (ORC). An ammonia/water single-effect absorption chiller was used. Thermodynamic performance of these two configurations was evaluated considering both energetic and exergetic approaches and a parametric investigation (varying inlet pressure in turbines and pinch point temperature in heat exchanger) was performed. The energetic efficiency of the best performance of this trigeneration integrated with a Rankine cycle was 57.56 % for the ORC, and 55.91 % for the SRC and exergetic efficiencies were 39.41 % and 37.8 3%, respectively.
Keywords
Trigeneration, Organic Rankine Cycle, energy, exergy, Efficiency
