Performance of humid air turbine with exhaust gas expanded to below ambient pressure based on microturbine

Wan, Kuifang; Zhang, Shijie; Jing, Wang; Xiao, Yunhan

doi:10.1016/j.enconman.2010.03.005

Cited by 16 publications

(5 citation statements)

References 26 publications

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“…Numerical simulations allowed us to analyze the performance of the MGT by varying the main parameters of the saturator. Wan et al [37] proposed an mHAT cycle in which the exhaust is discharged with pressure below ambient (BAHAT). Numerical models were implemented in gPROMS.…”

Section: Humidified Gas Turbinesmentioning

confidence: 99%

Numerical Modeling of Energy Systems Based on Micro Gas Turbine: A Review

Reale

Sannino

2022

Energies

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In the context of the great research pulse on clean energy transition, distributed energy systems have a key role, especially in the case of integration of both renewable and traditional energy sources. The stable interest in small-scale gas turbines can further increase owing to their flexibility in both operation and fuel supply. Since their not-excellent electrical efficiency, research activities on micro gas turbine (MGT) are focused on the performance improvements that are achievable in several ways, like modifying the Brayton cycle, integrating two or more plants, using cleaner fuels. Hence, during the last decades, the growing interest in MGT-based energy systems encouraged the development of many numerical approaches aimed to provide a reliable and effective prediction of the energy systems' behavior. Indeed, numerical modeling can help to individuate potentialities and issues of each enhanced layout or hybrid energy system, and this review aims to discuss the various layout solutions proposed by researchers, with particular attention to recent publications, highlighting the adopted modeling approaches and methods.

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Section: Humidified Gas Turbinesmentioning

confidence: 99%

Numerical Modeling of Energy Systems Based on Micro Gas Turbine: A Review

Reale

Sannino

2022

Energies

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“…Older low-NOx combustors used water for temperature control (Jonsson and Yan, 2005), since it acts as a diluent, reducing system temperatures. Although the addition of steam may appear to improve the power output, this does not take into account the energy of rendering the steam (Wan, et al, 2010). If water is added, efficiency gains would be reduced due to the energy required to convert the water into steam via evaporation.…”

Section: Humidified Turbine Cyclesmentioning

confidence: 99%

CO2-enhanced and humidified operation of a micro-gas turbine for carbon capture

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Finney

Ingham

et al. 2018

Journal of Cleaner Production

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As greenhouse gas emissions are a key driver of climate change, sources of CO 2 must be mitigated, particularly from carbon-intensive sectors, like power production. Natural gas provides an increasingly large percentage of electricity; however its lower carbon intensity is insufficient to make proportional reduction contributions to circumvent 2°C global warming. The low partial pressure of CO 2 in its flue gas makes postcombustion capture more challenging increasing the CO 2 in the exhaust assists in enhancing capture efficiency. This paper experimentally investigates the impact of the combination of humidified air turbines and exhaust gas recirculation to increase CO 2 partial pressures, with the aim of evaluating their effects on emissions and turbine parameters at various turndown ratios. It was found that CO 2 levels could be increased from 1.5 to 5.3 vol%, meaning more efficient post-combustion capture would be possible. CO 2 and steam additions increased incomplete combustion when used together at high levels for low turndown ratios (below 60%), with CO increasing from 49 to 211 ppm and CH 4 from 2.5 to 52 ppm; this effect was negated at higher power outputs. Turbine cycle humidification resulted in net improvements to the turbine efficiency, by up to 5.5% on a specific fuel consumption basis.

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“…If (17) is satisfied, then a reduction in the value of f has been obtained, the trial point is accepted, and a new iteration begins with possibly a larger trust-region radius. Otherwise the step is rejected and the trust-region radius is reduced.…”

Section: Solving the Mathematical Modelmentioning

confidence: 99%

“…Also Carapellucci and Cau studied a modular procedure based on fundamental thermodynamic relations, including real gas behavior [11], mainly used for power plants simulations [12]. Many other modular-based codes have been developed for commercial uses since their origin; examples include THERMOFLEX, property of Thermoflow Inc. [13], that is a fully flexible program for heat balance modeling and engineering, particularly suited to model both conventional [14] and unconventional power plants, like solar ones [15]; GE's GateCycle [16], a professional tool for both the gas and steam sides of power plant design and analysis [17]; Prosim, a modular simulation and design environment for power processes [18], developed by Endat Oy (Prosim, www.endat.fi). The great advantages of the modular approach have yielded the development of a whole class of object-oriented programming languages, among which the most notably is Modelica, introduced in 1996 within the project ESPRIT [19].…”

Section: Introductionmentioning

confidence: 99%