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A numerical study on the effects of constant volume combustion phase on performance and emissions characteristics of a diesel-hydrogen dual-fuel engine

A numerical study on the effects of constant volume combustion phase on performance and emissions characteristics of a diesel-hydrogen dual-fuel engine
A numerical study on the effects of constant volume combustion phase on performance and emissions characteristics of a diesel-hydrogen dual-fuel engine
A detailed numerical study is carried out to investigate the performance of a diesel-hydrogen dual fuel (DF) compression ignition engine operating under a novel combustion strategy in which diesel injection and most of the combustion occur at a constant volume. A detailed validation of the numerical model for diesel-hydrogen DF engine operation has been carried out. Then a parametric study has been performed to investigate the effects of the constant volume combustion phase (CVCP) at up to 90% hydrogen energy share (HES) on engine performance and emissions at low and high load with comparisons to the conventional engine. The results demonstrate that the CVCP strategy can improve thermal efficiency at all HESs and load conditions with far lower carbon-based emissions. Conventional DF engines struggle at low load high HESs due to the reduced diesel injection failing to ignite the leaner premixed charge. Through use of a CVCP thermal efficiency at low load 90% HES increased from 11% to 38% with considerably reduced hydrogen emission due to the increased temperatures and pressures allowing for the wholesale ignition of the hydrogen-air mix. It was also found that increasing the time allowed for combustion within the CVCP, by advancing the diesel injection, can lead to even further thermal efficiency gains while not negatively impacting emissions.
Constant Volume Combustion, Diesel-Hydrogen, Dual-Fuel Engine, Modelling and Simulation, Performance and Emissions
0360-3199
32598-32618
Ramsay, C.J
53b67448-3525-4d4f-9db8-bfa1585ee7a6
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Fairney, W.
c01964ca-8313-4560-b242-b63e9a467557
Vaughan, N.
e3111a1f-10dc-4055-8e9e-89444af10fc2
Ramsay, C.J
53b67448-3525-4d4f-9db8-bfa1585ee7a6
Ranga Dinesh, K.K.J
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Fairney, W.
c01964ca-8313-4560-b242-b63e9a467557
Vaughan, N.
e3111a1f-10dc-4055-8e9e-89444af10fc2

Ramsay, C.J, Ranga Dinesh, K.K.J, Fairney, W. and Vaughan, N. (2020) A numerical study on the effects of constant volume combustion phase on performance and emissions characteristics of a diesel-hydrogen dual-fuel engine. International Journal of Hydrogen Energy, 45 (56), 32598-32618. (doi:10.1016/j.ijhydene.2020.09.021).

Record type: Article

Abstract

A detailed numerical study is carried out to investigate the performance of a diesel-hydrogen dual fuel (DF) compression ignition engine operating under a novel combustion strategy in which diesel injection and most of the combustion occur at a constant volume. A detailed validation of the numerical model for diesel-hydrogen DF engine operation has been carried out. Then a parametric study has been performed to investigate the effects of the constant volume combustion phase (CVCP) at up to 90% hydrogen energy share (HES) on engine performance and emissions at low and high load with comparisons to the conventional engine. The results demonstrate that the CVCP strategy can improve thermal efficiency at all HESs and load conditions with far lower carbon-based emissions. Conventional DF engines struggle at low load high HESs due to the reduced diesel injection failing to ignite the leaner premixed charge. Through use of a CVCP thermal efficiency at low load 90% HES increased from 11% to 38% with considerably reduced hydrogen emission due to the increased temperatures and pressures allowing for the wholesale ignition of the hydrogen-air mix. It was also found that increasing the time allowed for combustion within the CVCP, by advancing the diesel injection, can lead to even further thermal efficiency gains while not negatively impacting emissions.

Text
HE-D-20-03837R1-Accepted-Manuscript - Accepted Manuscript
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More information

Accepted/In Press date: 1 September 2020
e-pub ahead of print date: 22 September 2020
Keywords: Constant Volume Combustion, Diesel-Hydrogen, Dual-Fuel Engine, Modelling and Simulation, Performance and Emissions

Identifiers

Local EPrints ID: 444186
URI: http://eprints.soton.ac.uk/id/eprint/444186
ISSN: 0360-3199
PURE UUID: a3a353b9-43e4-4304-a800-0979a60a22fb
ORCID for K.K.J Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

Catalogue record

Date deposited: 30 Sep 2020 17:04
Last modified: 26 Nov 2021 05:57

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Contributors

Author: C.J Ramsay
Author: W. Fairney
Author: N. Vaughan

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