A. Tozlu , E. Özahi, A. Abuşoğlu
3rd International Conference on Engineering and Natural Sciences (ICENS 2017), ISBN: 978-605-83575-4-9, Budapest, Hungary, May 3-7
Publication year: 2017

Closed cycle gas turbine power generation systems have a significant potential to produce power.
They have lost their first-time popularity when compared with more efficient open cycle gas
turbines, which is related to higher firing temperature. Nevertheless in the recent past, closed cycle
gas turbines become popular again as an alternative energy conversion method because of the
recent developments in working fluid technologies. In this study, a closed cycle gas turbine is
modeled for electricity production from the exhaust gas in Gaziantep Municipal Solid Waste (MSW)
Power Plant in the frame of heat recovery.
In this system, the supercritical CO2 (S-CO2) was used, which has the values of Pcrit=73.8 bar and
Tcrit=30.98 oC. Engineering equation solver (EES) was used for modeling the closed cycle gas turbine
using the energy and exergy equations. The total power production is found to be 1286.9 kW as a
result of the thermodynamic analyses. The overall energy and exergy efficiencies are evaluated as
47.16 % and 61.83 %, respectively. When energy and exergy efficiencies of the system are compared
to other gas turbine cycles which exist in the open literature, it is seen that the results are shown to
be acceptable within the system ranges.

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