End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine

Alireza Valipour Berenjestanaki, Nobuyuki Kawahara, Kazuya Tsuboi, Eiji Tomita

Research output: Contribution to journalArticle

Abstract

To improve the thermal efficiency of internal combustion engines at high loads, premixed mixture ignition in the end-gas region (PREMIER) combustion is proposed as a precursor to knocking. In the current work, a pilot fuel-ignited dual-fuel gas engine was operated at constant speed under different intake pressures (101, 150, and 200 kPa). A simulated biogas was served as the primary fuel and diesel as the pilot fuel. The maximum mean effective pressure and thermal efficiency were evident during PREMIER operation because of autoignition in the end-gas region. Similar to knocking combustion, PREMIER combustion features two stages but neither pressure oscillation nor a rapid pressure rise is observed. We here define a new parameter, the PREMIER intensity (PI), which reflects the strength of PREMIER combustion. As the injection timing was advanced and the pressure boosted, more cycles underwent end-gas autoignition; the associated heat release increased and, consequently, the PI value rose. When the pressure and temperature of a premixed fuel mixture rose as injection timing was advanced, end-gas autoignition commenced earlier. The end-gas autoignition delay became shorter as intake pressure was increased and injection timing advanced.

Original languageEnglish
Article number115634
JournalFuel
Volume254
DOIs
Publication statusPublished - Oct 15 2019

Fingerprint

Biofuels
Biogas
Ignition
Gases
Engines
Dual fuel engines
Gas engines
Gas fuels
Internal combustion engines

Keywords

  • Autoignition
  • Biogas
  • Dual-fuel engine
  • Pilot injection
  • Thermal efficiency

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine. / Valipour Berenjestanaki, Alireza; Kawahara, Nobuyuki; Tsuboi, Kazuya; Tomita, Eiji.

In: Fuel, Vol. 254, 115634, 15.10.2019.

Research output: Contribution to journalArticle

@article{c38db0fb173d436a8dbe6a953862b9fd,
title = "End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine",
abstract = "To improve the thermal efficiency of internal combustion engines at high loads, premixed mixture ignition in the end-gas region (PREMIER) combustion is proposed as a precursor to knocking. In the current work, a pilot fuel-ignited dual-fuel gas engine was operated at constant speed under different intake pressures (101, 150, and 200 kPa). A simulated biogas was served as the primary fuel and diesel as the pilot fuel. The maximum mean effective pressure and thermal efficiency were evident during PREMIER operation because of autoignition in the end-gas region. Similar to knocking combustion, PREMIER combustion features two stages but neither pressure oscillation nor a rapid pressure rise is observed. We here define a new parameter, the PREMIER intensity (PI), which reflects the strength of PREMIER combustion. As the injection timing was advanced and the pressure boosted, more cycles underwent end-gas autoignition; the associated heat release increased and, consequently, the PI value rose. When the pressure and temperature of a premixed fuel mixture rose as injection timing was advanced, end-gas autoignition commenced earlier. The end-gas autoignition delay became shorter as intake pressure was increased and injection timing advanced.",
keywords = "Autoignition, Biogas, Dual-fuel engine, Pilot injection, Thermal efficiency",
author = "{Valipour Berenjestanaki}, Alireza and Nobuyuki Kawahara and Kazuya Tsuboi and Eiji Tomita",
year = "2019",
month = "10",
day = "15",
doi = "10.1016/j.fuel.2019.115634",
language = "English",
volume = "254",
journal = "Fuel",
issn = "0016-2361",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine

AU - Valipour Berenjestanaki, Alireza

AU - Kawahara, Nobuyuki

AU - Tsuboi, Kazuya

AU - Tomita, Eiji

PY - 2019/10/15

Y1 - 2019/10/15

N2 - To improve the thermal efficiency of internal combustion engines at high loads, premixed mixture ignition in the end-gas region (PREMIER) combustion is proposed as a precursor to knocking. In the current work, a pilot fuel-ignited dual-fuel gas engine was operated at constant speed under different intake pressures (101, 150, and 200 kPa). A simulated biogas was served as the primary fuel and diesel as the pilot fuel. The maximum mean effective pressure and thermal efficiency were evident during PREMIER operation because of autoignition in the end-gas region. Similar to knocking combustion, PREMIER combustion features two stages but neither pressure oscillation nor a rapid pressure rise is observed. We here define a new parameter, the PREMIER intensity (PI), which reflects the strength of PREMIER combustion. As the injection timing was advanced and the pressure boosted, more cycles underwent end-gas autoignition; the associated heat release increased and, consequently, the PI value rose. When the pressure and temperature of a premixed fuel mixture rose as injection timing was advanced, end-gas autoignition commenced earlier. The end-gas autoignition delay became shorter as intake pressure was increased and injection timing advanced.

AB - To improve the thermal efficiency of internal combustion engines at high loads, premixed mixture ignition in the end-gas region (PREMIER) combustion is proposed as a precursor to knocking. In the current work, a pilot fuel-ignited dual-fuel gas engine was operated at constant speed under different intake pressures (101, 150, and 200 kPa). A simulated biogas was served as the primary fuel and diesel as the pilot fuel. The maximum mean effective pressure and thermal efficiency were evident during PREMIER operation because of autoignition in the end-gas region. Similar to knocking combustion, PREMIER combustion features two stages but neither pressure oscillation nor a rapid pressure rise is observed. We here define a new parameter, the PREMIER intensity (PI), which reflects the strength of PREMIER combustion. As the injection timing was advanced and the pressure boosted, more cycles underwent end-gas autoignition; the associated heat release increased and, consequently, the PI value rose. When the pressure and temperature of a premixed fuel mixture rose as injection timing was advanced, end-gas autoignition commenced earlier. The end-gas autoignition delay became shorter as intake pressure was increased and injection timing advanced.

KW - Autoignition

KW - Biogas

KW - Dual-fuel engine

KW - Pilot injection

KW - Thermal efficiency

UR - http://www.scopus.com/inward/record.url?scp=85068184734&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068184734&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2019.115634

DO - 10.1016/j.fuel.2019.115634

M3 - Article

AN - SCOPUS:85068184734

VL - 254

JO - Fuel

JF - Fuel

SN - 0016-2361

M1 - 115634

ER -