DESIGN OF HEAT EXCHANGER FOR THE GAS TURBINE AIR INLET COOLING

Efficiency of a gas turbine is closely related to the intake air temperature. An increase in
the intake air temperature will results in a decreasing of the turbine efficiency. This
report basically discusses the results from the research done and basic understanding of
the chosen topic, which is design of a heat exchanger for gas turbine inlet air cooling
system. The project aims at providing a constant air temperature at the inlet side of the
gas turbine irrespective of the change in ambient temperature by employment of a heat
exchanger to reduce the temperature at constant low temperature. In this paper, focus is
given to the best fin geometry for plate and fin heat exchanger in order to improve the
efficiency of the gas turbine. This paper also discussed about the selection of a few
parameters based on given standard rating in designing high performance plate and fin
heat exchanger with high transfer rate of heat and a few numerical solution to find the
suitable sizing of heat exchanger for gas turbine at Gas District Cooling area. A clear
methodology to complete this project was also proposed in this paper. As a result from
this research, it was said to achieve the objectives made with satisfied parameters that
can be applied to the real world problem to reduce the air temperature. The results were
done with the helped of assumptions made and with set of analytical equations to
identify the parameters desired. Fin surface geometry of 1/8 - 16.00 (D) can be use for
air side while as for the water side, geometry of 1/8-19.82 (D) can be use. Both of the
fin surface geometry was tested and proved to reduce the air and water temperature and
yield a satisfied heat transfer coefficient, as well as efficiency.