Development of combustion dynamics at co-combustion of straw with wood

Kalis, Harijs; Kolmičkovs, Antons; Marinaki, Maksims; Ozola, Liva

doi:10.22616/erdev2018.17.n114

Cited by 1 publication

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“…The action of the electric body force results in reduction of the free flame length. The maximum field effect was achieved with a 10-20% straw mass fraction in the fuel mixture (peat, wood, coal) [2], [15], [17].…”

Section: Introductionmentioning

confidence: 98%

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Mathematical Modelling and Experimental Study of Straw Co-Firing With Gas

Barmina

Kalis

Kolmičkovs

et al. 2019

Mathematical Modelling and Analysis

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The main goal of the present study is to promote a more eﬀective use of agriculture residues (straw) as an alternative renewable fuel for cleaner energy production with reduced greenhouse gas emissions. With the aim to improve the main combustion characteristics at thermo-chemical conversion of wheat straw, complex experimental study and mathematical modelling of the processes developing when co-ﬁring wheat straw pellets with a gaseous fuel were carried out. The eﬀect of co-ﬁring on the main gasiﬁcation and combustion characteristics was studied experimentally by varying the propane supply and additional heat input into the pilot device, along with the estimation of the eﬀect of co-ﬁring on the thermal decomposition of wheat straw pellets, on the formation, ignition and combustion of volatiles (CO, H2). A mathematical model has been developed using the environment of the Matlab (2D modelling) and MATLAB package ”pdepe”(1D modelling) considering the variations in supplying heat energy and combustible volatiles (CO, H2) into the bottom of the combustor. Dominant exothermal chemical reactions were used to evaluate the eﬀect of co-ﬁring on the main combustion characteristics and composition of the products CO2 and H2O. The results prove that the additional heat from the propane ﬂame makes it possible to control the thermal decomposition of straw pellets, the formation, ignition and combustion of volatiles and the development of combustion dynamics, thus completing the combustion of biomass and leading to cleaner heat energy production.

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Section: Introductionmentioning

confidence: 98%

“…In [2], [14], [15], [17], the applied electric field induces an electric current between the walls of the combustor and the axially inserted electrode of different length. The perfect gas model is used to solve the inviscid, axisymmetric, steady swirling flow with axial and radial velocities and with circulation.…”

Section: Introductionmentioning

confidence: 99%