Title: Effects of methanol substitution rate on combustion and emission characteristics of methanol/diesel dual fuel engines

Authors: Changchun Xu; Huabing Wen; Haiguo Jing; Jingrui Li; HaengMuk Cho; Daifen Chen

Addresses: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212114, China; CSSC Marine Power Co., Ltd., Zhenjiang 212002, China ' School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212114, China ' CSSC Marine Power Co., Ltd., Zhenjiang 212002, China ' School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212114, China; CSSC Marine Power Co., Ltd., Zhenjiang 212002, China ' Division of Mechanical and Automotive Engineering, Kongju National University, 275, Budae-dong, Cheonan-si 331-717, Chungcheongnam-Do, South Korea ' School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212114, China

Abstract: In order to investigate how methanol affects combustion and emission, this article tries to alter the ratio of substitution of methanol. The methanol replacement rate is set as 0%, 10%, 20%, 30%, 40% for researching engine combustion performance and exhaust emissions. The results indicate that, under medium and low load circumstances, the maximum burst pressure in the cylinder falls, the ignition delay lengthens, and the general consumption of energy increases as the methanol substitution rate increases. HC and CO emissions exhibited an increase, whereas NO_x emissions demonstrated a decrease. Under high load conditions, the maximum explosion pressure initially rose and subsequently declined. Additionally, the total energy consumption displayed an initial decreasing trend followed by an increasing trend. HC and CO emissions experienced a slight increase, while NO_x levels remained relatively stable before eventually decreasing. [Received: January 17, 2024; Accepted: April 1, 2024]

Keywords: methanol substitution ratio; high latent heat of vaporisation; combined injection; performance; exhaust emissions.

DOI: 10.1504/IJOGCT.2024.142060

International Journal of Oil, Gas and Coal Technology, 2024 Vol.36 No.4, pp.509 - 531

Received: 10 Jan 2024
Accepted: 01 Apr 2024
Published online: 07 Oct 2024 *

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