Naslov
Numerical Modelling of the Combustion Process of Biofuel Produced From Plant Origin

Autori
Krajcar, Manuel ; Jurić, Filip ; Vujanović, Milan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceeding of 25th Conference on Process Integration for Energy Saving and Pollution Reduction – PRES'22 / - , 2022, 1-10

Skup
25th Conference on Process Integration for Energy Saving and Pollution Reduction – PRES'22

Mjesto i datum
Online ; Bol, Hrvatska, 05.09.2022. - 08.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Biofuel ; Emission ; Nitrogen oxides ; Combustion ; Spray ; Chemical mechanism

Sažetak
In order to meet the reductions of carbon dioxide, carbon-neutral biofuels are drawing attention as an alternative to fossil fuels. One fuel that can be implemented in existing internal combustion engines and shows similar combustion characteristics as conventional fuels is biofuels produced from non-edible and algal biomass. Computational fluid dynamics (CFD) is frequently used to assess and test the combustion properties of new fuels, including biofuels. In this work, a numerical analysis of combustion and pollutant formation characteristics for different biofuel generations is performed, emphasizing biodiesel from coconut oil, waste coffee grounds, tomato seeds, and microalgae. The quantification of the formed pollutant emissions from the specific four biofuels was investigated employing CFD analysis, which gives detailed insight into the physical and chemical phenomena during the combustion process, often not visible from an experiment. Numerical simulations of the combustion process with mentioned biofuels were conducted in the CFD software AVL FIRE™. The numerical simulations were validated by comparing the simulation data with the incorporated University of Connecticut (UCONN) biofuel chemical mechanism against experimental data. For the numerical simulations, combustion conditions were examined on the internal combustion operating point. The spray injection regime was modelled with the Euler Lagrangian spray modelling approach, for which the liquid properties are defined based on the biofuel composition described with saturated and unsaturated components. By varying the biodiesel/diesel mixture content, results of mean in-cylinder pressure, temperature, rate of heat release, and pollutant emissions were compared to the results of conventional fuel. For the coconut oil, the lowest nitrogen oxide emissions are achieved, compared to the biofuel from microalgae spirulina, for which the results closest to the conventional fuel in the transport sector are achieved.

Izvorni jezik
Hrvatski

Znanstvena područja
Strojarstvo

POVEZANOST RADA