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Theoretical investigation of combustion and performance analysis of diesel engine under low load conditions

Citation

Mustayen, AGMB and Wang, X and Rasul, MG and Hamilton, JM and Negnevitsky, M, Theoretical investigation of combustion and performance analysis of diesel engine under low load conditions, IOP Conference Series: Earth and Environmental Science, 08-10 July, Sanya, China ISSN 1755-1307 (2021) [Refereed Conference Paper]


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DOI: doi:10.1088/1755-1315/838/1/012013

Abstract

Diesel engine is using prominently in islands and remote areas due to its reliability and stability for power generation. In recent years, most of the isolated power systems (e.g., islands and remote areas) have integrated renewable energies to reduce both the cost and pollution in diesel power generating system. However, due to intermittent and stochastic behaviour of renewable sources (e.g., solar and wind), it is unable to eliminate diesel generation entirely. In that case, low-load diesel operation (operation < 30% of maximum rated load) is particularly relevant for its ability to support higher levels of renewable penetration. In this paper, a thermodynamic model was developed using MATLAB for diesel engine combustion and performance. This model includes sub models such as heat release rate, heat transfer, double-Wiebe function, and ignition delay correlation. Engine thermal efficiency (TE), brake power (BP), indicated mean effective pressure (IMEP) and brake specific fuel consumption (BSFC) has been taken into consideration for performance analysis. The simulation results show that at 25% load, in-cylinder pressure and temperature are 168 bar and 2300 K which are the cause of lower heat release rate (74 J/deg) and longer ignition delay (0.25 ∼0.5 ms higher than that of conventional mode) and significantly responsible for lower efficiency (18%), brake power (4kW) and higher brake specific fuel consumption (1.2 g/kWh).

Item Details

Item Type:Refereed Conference Paper
Keywords:diesel engine, combustion, performance analysis
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy systems and analysis
UTAS Author:Mustayen, AGMB (Mr Billah)
UTAS Author:Wang, X (Professor Xiaolin Wang)
UTAS Author:Rasul, MG (Professor Mohammad Rasul)
UTAS Author:Hamilton, JM (Mr James Hamilton)
UTAS Author:Negnevitsky, M (Professor Michael Negnevitsky)
ID Code:146798
Year Published:2021
Deposited By:Engineering
Deposited On:2021-09-27
Last Modified:2021-11-29
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