Comparative exergoeconomic analyses of the integration of biomass gasification and a gas turbine power plant with and without fogging inlet cooling

Abstract

a b s t r a c tInlet cooling is effective for mitigating the decrease in gas turbine performance during hot and humid summer periods when electrical power demands peak, and steam injection, using steam raised from the turbine exhaust gases in a heat recovery steam generator, is an effective technique for utilizing the hot turbine exhaust gases. Biomass gasification can be integrated with a gas turbine cycle to provide efficient, clean power generation. In the present paper, a gas turbine cycle with fog cooling and steam injection, and integrated with biomass gasification, is proposed and analyzed with energy, exergy and exergoeconomic analyses. The thermodynamic analyses show that increasing the compressor pressure ratio and the gas turbine inlet temperature raises the energy and exergy efficiencies. On the component level, the gas turbine is determined to have the highest exergy efficiency and the combustor the lowest. The exergoeconomic analysis reveals that the proposed cycle has a lower total unit product cost than a similar plant fired by natural gas. However, the relative cost difference and exergoeconomic factor is higher for the proposed cycle than the natural gas fired plant, indicating that the proposed cycle is more costly for producing electricity despite its lower product cost and environmental impact.

Comparative Exergoeconomic Analyses of Gas Turbine Steam Injection Cycles with and without Fogging Inlet Cooling

“…We address this need in the present paper by carrying out exergoeconomic analyses of gas-turbine cycles utilizing both fogging for inlet cooling and steam injection to improve understanding of the techno-economic behavior of such systems and assist improvement efforts. The authors have previously published an article regarding the utilization of fog cooling in biomass fired plants and its exergoeconomic analysis [18], and the present work extends those efforts. The FSTIG cycle and its components are assessed and the advantages and disadvantages of the FSTIG cycle are compared with those for other cycles.…”

Peculiarities of the transit phase transformation regime for water droplets that are slipping in humid gas

“…Water spray application in air conditioning [2], fire suppression [3][4][5][6][7], gas cooling [8,9] and agricultural irrigation systems [10,11] can be considered as traditional. Heat and mass transfer processes are applied for surface treatment [12][13][14] and protection [15][16][17][18], cooling towers [19][20][21]9,22], washing processes [23][24][25], water freezing and crystallization [26][27][28], aerosols [29,30], gas turbines [31][32][33][34][35], heat recovery from humid flue gas [36,37], NO x reduction in fuel combustion [38][39][40], water and fuel emulsions [41][42][43][44], plasma technique [45][46][47] and other thermal technologies. Wide water spraying application practice defi...…”

Advanced Exergy, Exergoeconomic, and Exergoenvironmental Analyses of Integrated Solar-Assisted Gasification Cycle for Producing Power and Steam from Heavy Refinery Fuels

“…The largest share of exergy destruction is related to the gasification unit. Athari et al [22] Investigation of a gas turbine cycle with fog cooling and biomass gasification. Perna et al [23] Investigation of combined biomass and solar energy sources in a gasification cycle for hydrogen production.…”