Computer-Aided Exergy Study of a Gas Microturbine Cogeneration System

In the following article, an exergetic analysis of a microturbine operating with a regenerative Brayton cycle was carried out in order to identify the variation in exergy and exergy destruction behaviour generated in each component of the system by comparing these results to different microturbine loads. The study was carried out on a Brayton cycle with cogeneration which is composed of a compressor, combustion chamber, gas turbine, HRSG and an air preheater. In which the output power of the turbine was varied for the five case studies starting at 25kW to 45kW. As the study is carried out, at 45kW the greatest exergy is consumed and in the combustion chamber it is the one that contributes most to the destruction of exergy, adding up to an average of 36.5% of the total destroyed. With this it was shown that the increase of the power output of the turbine increases the needs of each component of the system and also increases the exertions of the system.

[1]  S. C. Kaushik,et al.  Thermoeconomic evaluation and optimization of a Brayton–Rankine–Kalina combined triple power cycle , 2013 .

[2]  Fengrui Sun,et al.  Exergetic performance optimization for new combined intercooled regenerative Brayton and inverse Brayton cycles , 2016 .

[3]  Ramón Ferreiro García,et al.  Thermodynamic analysis of a Brayton cycle and Rankine cycle arranged in series exploiting the cold exergy of LNG (liquefied natural gas) , 2014 .

[4]  Majid Amidpour,et al.  Energy and exergy analysis of novel combined cooling and power (CCP) cycles , 2017 .

[5]  Ata D. Akbari,et al.  Thermoeconomic analysis & optimization of the combined supercritical CO2 (carbon dioxide) recompression Brayton/organic Rankine cycle , 2014 .

[6]  P. Ahmadi,et al.  Advanced exergy analysis of a carbon dioxide ammonia cascade refrigeration system , 2018, Applied Thermal Engineering.

[7]  Fengrui Sun,et al.  Power optimization of an endoreversible closed intercooled regenerated Brayton cycle , 2005 .

[8]  Said Farahat,et al.  Exergoeconomic multi objective optimization and sensitivity analysis of a regenerative Brayton cycle , 2016 .

[9]  Said Farahat,et al.  New exergy analysis of a regenerative closed Brayton cycle , 2017 .

[10]  Yasin Ust,et al.  Thermodynamic optimization of an irreversible regenerative closed Brayton cycle based on thermoeconomic performance criterion , 2014 .

[11]  Santiago del Rio Oliveira,et al.  Ecological optimization of an irreversible Brayton cycle with regeneration, inter-cooling and reheating , 2015 .

[12]  V. Zare,et al.  Energy and exergy analysis of a closed Brayton cycle-based combined cycle for solar power tower plants , 2016 .

[13]  Lingen Chen,et al.  Power density analysis and optimization of an irreversible closed intercooled regenerated Brayton cycle , 2008, Math. Comput. Model..

[14]  M. Goodarzi,et al.  Performance analysis of a modified regenerative Brayton and inverse Brayton cycle , 2014 .

[15]  Yousef Haseli,et al.  Efficiency of irreversible Brayton cycles at minimum entropy generation , 2016 .

[16]  Carlos Guardiola,et al.  Further analysis of a compression-expansion machine for a Brayton Waste Heat Recovery cycle on an IC engine , 2018 .

[17]  Sung Ho Park,et al.  Thermodynamic and economic investigation of coal-fired power plant combined with various supercritical CO2 Brayton power cycle , 2018 .

[18]  N. Sarunac,et al.  Thermodynamic analysis of simple and regenerative Brayton cycles for the concentrated solar power applications , 2018 .

[19]  M. Goodarzi,et al.  Comparative energy analysis on a new regenerative Brayton cycle , 2016 .