Influence of Hydrogen on the Performance and Emissions Characteristics of a Spark Ignition Ammonia Direct Injection Engine

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS Greenhouse Gases: Science and Technology Pub Date : 2023-10-16 DOI:10.3390/gases3040010
Cheolwoong Park, Yonghun Jang, Seonyeob Kim, Yongrae Kim, Young Choi
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Abstract

Because ammonia is easier to store and transport over long distances than hydrogen, it is a promising research direction as a potential carrier for hydrogen. However, its low ignition and combustion rates pose challenges for running conventional ignition engines solely on ammonia fuel over the entire operational range. In this study, we attempted to identify a stable engine combustion zone using a high-pressure direct injection of ammonia fuel into a 2.5 L spark ignition engine and examined the potential for extending the operational range by adding hydrogen. As it is difficult to secure combustion stability in a low-temperature atmosphere, the experiment was conducted in a sufficiently-warmed atmosphere (90 ± 2.5 °C), and the combustion, emission, and efficiency results under each operating condition were experimentally compared. At 1500 rpm, the addition of 10% hydrogen resulted in a notable 20.26% surge in the maximum torque, reaching 263.5 Nm, in contrast with the case where only ammonia fuel was used. Furthermore, combustion stability was ensured at a torque of 140 Nm by reducing the fuel and air flow rates.
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氢气对火花点火式氨直喷发动机性能及排放特性的影响
由于氨比氢更容易储存和长距离运输,它作为氢的潜在载体是一个很有前途的研究方向。然而,它的低点火和燃烧速率给在整个工作范围内仅使用氨燃料的传统点火发动机带来了挑战。在这项研究中,我们试图通过向2.5 L火花点火发动机高压直喷氨燃料来确定稳定的发动机燃烧区域,并研究了通过添加氢气来延长工作范围的潜力。由于在低温气氛下难以保证燃烧稳定性,实验在足够温暖的气氛下(90±2.5℃)进行,并对各工况下的燃烧、排放和效率结果进行了实验比较。在1500转/分时,加入10%的氢气,与只使用氨燃料的情况相比,最大扭矩增加了20.26%,达到263.5 Nm。此外,通过降低燃料和空气流量,在140 Nm的扭矩下确保了燃烧稳定性。
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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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