First International Conference on MOLDAVIAN RISKS – FROM ...

<strong>First</strong> <strong>International</strong> <strong>Conference</strong> on MOLDAVIAN RISKS - FROM GLOBAL TO LOCAL SCALE
16-19 May 2012, Bacau, Romania
COMPARATIVE STUDY VIEWING THE EFFICIENCY OF
THE GRANULAR FILTERS DEPENDING ON THE TYPE OF
THE FILTER MATERIAL
Marius Stanila, Valentin Nedeff, Mirela Panainte, Alexandra Dana Chitimus
“Vasile Alecsandri” University of Bacau, Department of Environmental and Mechanical
Engineering
Corresponding author: Stanila Marius, mstanila63@gmail.com
Abstract: The paper presents several aspects regarding the operation optimization, during
the warm season, for a mixed cycle gas turbine, type Titan 130S, installed at S.C. CET
S.A. Bacau. The operation optimization at partial loads for the mixed cycle gas turbine,
type Titan 130S, has been done using the multicriteria analysis, taking into consideration
the operation’s restrictions required for this type of gas turbine. The criteria taken into
consideration for the multicriteria analysis are: the thermic energy demand, the global
efficiency in high efficiency cogeneration operating conditions, the electric energy price,
NOx emissions level, CO2 emissions level. These criteria have been applied to several gas
turbine operating conditions, after analysing this data the optimum operation condition was
chosen, that was correspondent to a predefined forecast period. These scenarios have taken
into consideration the need to ensure the forecast thermic energy demand for hot tap water
supply to the domestic and non-domestic clients in Bacau city during the warm season,
with both energy and financial efficiency and with a low level of pollutant emissions.
There are two operating restrictions considered for the gas turbine, the first is of a technical
nature and the second regards the admissible level for NOx emissions. The restrictions with
a technical nature take into discussion the maximum number of turbine start-ups, the daily
number of start-ups and the annual number of start-ups for this type of turbine being
limited. This limitation is due to the stress of the equipments during the turbine start-up
drive, and exceeding the allowed number of start-ups leads to premature wearing and to the
growth of the maintenance expenses. The restrictions regarding the NOx emissions level
derive from the installation of a SoLoNOx combustion system for this type of turbine. The
SoLoNOx combustion system ensures a low level of NOx emissions, and the considered
restriction is due to this type of combustion start-up operation at loads higher than 60% of
this type of gas turbine rated power. The SoLoNOx combustion system uses powerful
swirl injectors that produce an intense circulating area for the mix-fuel in the combustion
chamber, with low oxygen level so as the combustion takes place at a low temperature,
thus blocking the formation of thermic NOx.
Key words: gas turbine, optimization, emission, combustion system.
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