Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Costs assessment in a HAT cycle
Submission Author:
Felipe Raul Ponce Arrieta , MG
Co-Authors:
Felipe Raul Ponce Arrieta, Hairton Júnior José da Silveira
Presenter: Felipe Raul Ponce Arrieta
doi://10.26678/ABCM.COBEM2017.COB17-1014
Abstract
The project aims to analyze the investment and electricity generation costs a humidified air turbine (HAT) cycle for microturbine application. The analysis target the power levels, efficiency and optimum design operation point in order to choose which enables to the higher power generation. A numerical simulation performed in the cycle in software Gate Cycle™ checked the environmental parameters that influence the cycle performance. The main parameters of variation were the outlet temperature of the combustion chamber (900 to 1400ºC), and the pressure ratio of the compressor and the turbine (9 to 13). Graphics we plotted for thermal efficiency, specific power, exergetic efficiency, unit exergetic cost and electricity generation cost of the cycle related to the cycle pressure ratio, thus enabling us to evaluate the best design operation point. This point was chosen for a turbine inlet temperature of 1100ºC and a cycle pressure ratio of 13, in which a higher efficiency (51.93%) is reached with a medium exergetic cost (2.001) without compromising the physical and metallurgical properties of the hot path turbine components, reaching 1.078 MW of net cycle power on the simulation. Therefore, a detailed analysis of the cost of generation we made considering the fuel, the O&M and the investment costs. The investment cost of all components achieve 685,525.05US$ and the system showed the electricity generation cost about 25.60 R$/MWh, which is very competitive in the Brazilian electricity market.
Keywords
Gas microturbine, humidified air turbine, HAT Cycle, cost
