Control of the Development of Swirling Airflow Dynamics and Its Impact on Biomass Combustion Characteristics

Barmina, Inesa; Valdmanis, Raimonds; Zake, Maija

doi:10.1515/lpts-2017-0018

Cited by 2 publications

(1 citation statement)

References 11 publications

(8 reference statements)

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“…In terms of the EU 20/20/20 targets of cleaner energy production [11], the use of green energy sources, such as harvesting (wood) and agricultural (straw) residues [3], Barmina et al [4], Abricka et al [1], Glithero et al [12] has become very important. Due to the rapidly increasing consumption of harvesting residues, there is a growing demand for wider use of agricultural residues (wheat or rape straw) for energy production.…”

Section: Introductionmentioning

confidence: 99%

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: 99%

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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show abstract

Microwave Pre-Treatment and Blending of Biomass Pellets for Sustainable Use of Local Energy Resources in Energy Production

et al. 2022

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In the present study analysis of co-firing microwave (MW) pre-treated biomass pellets of different origins (wood and wheat straw), with raw pellets (wood, straw, and peat), to control and improve thermochemical conversion of biomass blends and achieve a sustainable use of local energy resources in energy production has been carried out. Effects of MW pre-treatment regimes and composition of blends were studied experimentally using measurements of the weight loss of blends, the yield of volatiles, flame temperature, total heat output from the device, and composition of products. It was found that co-firing MW pre-treated and raw biomass pellets promotes synergistic interaction between components of blends by increasing mass loss rate, the intensity of which depends on the proximate composition of pellets, MW pre-treatment regime and mass fraction of pre-treated pellets in the blend. The most effective synergistic interaction was found when co-firing pre-treated straw or wood pellets with raw peat, which increased the yield of combustible volatiles and heat output from the device as well as improved the composition of emissions. The least effective synergistic interaction was observed when co-firing pre-treated straw with raw wood pellets. Main factors that influenced the thermal and chemical conversion of MW pre-treated blends are discussed considering the effects of MW pre-treatment on the structural changes, elemental and chemical composition, and heating value of pre-treated pellets.

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Control of the Development of Swirling Airflow Dynamics and Its Impact on Biomass Combustion Characteristics

Cited by 2 publications

References 11 publications

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

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

Microwave Pre-Treatment and Blending of Biomass Pellets for Sustainable Use of Local Energy Resources in Energy Production

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