The Performance Improvement In Garri Combined Cycle Power Plant By Inlet Air Media Type Evaporative Cooling
The Performance Improvement In Garri Combined Cycle Power Plant By Inlet Air Media Type Evaporative Cooling
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Date
2015-05-03
Authors
El-Gidi, Mahedi Ahmed
Journal Title
Journal ISSN
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Publisher
UOFK
Abstract
The Gas turbine performance is highly sensitive to the compressor
inlet temperature. In Sudan the output of gas turbine falls to a value that is
less than the rated output under high temperature conditions. The solution of
this problem is important because the peak demand season in Sudan happens
in the summer. One of the convenient methods of inlet air cooling is
evaporative media type which appropriate for hot and dry weather. As the
gas turbine and combined plants in Sudan installed in such ambient
conditions, therefore this method can be used to improve the performance of
gas turbine and combined cycle plants.
This thesis focuses on performance improvement of a Gas turbine
and combined cycle power plant by air inlet media type evaporative system
cooling.
By application of media cooling system in Garri combined cycle
power plant, in eight frame 6 gas turbines. The performance test results
show that the power out of frame 6 gas turbines, (GT1 to GT8) increased by
4.4MW (14%), 5.7MW (18%), 2.1MW (6.8%), 4.5MW (15%), 4.3MW
(15%), 4MW (13), 4.1MW (14%) and 3.4MW (10%). And also steam
turbines 1 to 3 increased by 1MW and steam turbine 4 increased by 0.5MW.
The heat rate for gas turbines decreased by 3.7%, 7.2%, 3.9%, 6.4%,
4%,3.3%,2.3% and 2.4%. Also the efficiency of gas turbines increased by
1%, 2.2%, 1%, 2%, 1.4%, 1 %, 0.6% and 1%.
iv
According to the economical calculations in this thesis the pay back
period is estimated to be 0.23 year (2.8 months) for the evaporative cooling
system, the study in this research has shown that the media type evaporative
cooling system is suitable for the dry and hot climate like Sudan for gas
turbine power enhancement.
Description
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Keywords
Performance,Improvement ,Garri,Combined,Cycle,Power,Plant,Inlet Air Media,Type,Evaporative,Cooling