恒压顺序燃烧系统中部分分解氨洁净高效燃烧的富淬贫分级策略数值评价

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Tarjei Heggset, Ole Meyer, Luis Tay Wo Chong Hilares, Andrea Ciani, Andrea Gruber
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引用次数: 0

摘要

在未来的能源系统中,可预见的是(通常)远程且(总是)不稳定,不可调度的可再生能源发电由太阳能和风能资源主导,氢(H2)和氨(NH3)作为物流方便,化学简单和无碳的化学品出现在能源运输和储存中。在这种情况下,Ansaldo的恒压顺序燃烧(CPSC)系统的一个方便的特点是,根据燃料的反应性和燃烧特性,可以独立控制两个燃烧阶段的燃料量,这与其他替代方法相比具有根本的优势。然而,与氢气相比,氨的燃烧是由截然不同的热化学过程控制的,因此需要一种截然不同的方法来缓解极低的火焰反应性(爆出)和形成大量不需要的污染物和温室气体(NOx和N2O)的关键问题。在这项工作中,我们提出了CPSC系统的燃料柔性操作概念,并基于非定常雷诺平均纳维-斯托克斯(uRANS)和大涡模拟(LES),结合详细的化学动力学,我们首次探索了CPSC体系结构在应用于部分分解氨燃烧的富淬-贫(RQL)策略下的满负荷运行。数值模拟结果证实了之前在不同燃烧系统中观察到的RQL运行中氨燃烧的主要特征,并表明CPSC结构具有良好的潜力,可以在RQL模式下运行,具有低NOx和N2O排放和良好的燃烧效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical Assessment of a Rich-Quench-Lean Staging Strategy for Clean and Efficient Combustion of Partially Decomposed Ammonia in the Constant Pressure Sequential Combustion System
Abstract In a future energy-system prospective, predictably dominated by (often) remote and (always) unsteady, non-dispatchable renewable power generation from solar and wind resources, hydrogen (H2) and ammonia (NH3) have emerged as logistically convenient, chemically-simple and carbon-free chemicals for energy transport and storage. In this context, a convenient feature of Ansaldo's Constant Pressure Sequential Combustion (CPSC) system, resulting in a fundamental advantage compared to alternative approaches, is the possibility of controlling the amount of fuel independently fed to the two combustion stages, depending on the fuel reactivity and combustion characteristics. However, ammonia combustion is governed by widely different thermo-chemical processes compared to hydrogen, requiring a considerably different approach to mitigate crucial issues with extremely low flame reactivity (blow-out) and formation of significant amounts of undesired pollutants and greenhouse gases (NOx and N2O). In this work, we present a fuel-flexible operational concept for the CPSC system and, based on unsteady Reynolds-Averaged Navier-Stokes (uRANS) and Large Eddy Simulation (LES) performed in conjunction with detailed chemical kinetics, we explore for the first time full-load operation of the CPSC architecture in a Rich-Quench-Lean (RQL) strategy applied to combustion of partially-decomposed ammonia. Results from the numerical simulations confirm the main features of ammonia-firing in RQL operation already observed from previous work on different combustion systems and suggests that the CPSC architecture has excellent potential to operate in RQL-mode with low NOx and N2O emissions and good combustion efficiency.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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