Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors
The aim of the work is to determine the energy-efficient speed level of a two-tier paddle mixer with blades installed at an angle of 90° to improve the energy efficiency of the biogas formation process in small biogas reactors. To achieve the set goals, physical methods, three-dimensional model-...
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| Format: | Article |
| Language: | English |
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Academy of Sciences of Moldova
2025-08-01
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| Series: | Problems of the Regional Energetics |
| Subjects: | |
| Online Access: | https://journal.ie.asm.md/assets/files/12_03_67_2025.pdf |
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| author | Spodoba M.O. Spodoba О.O. Kovalchuk S.I. Oliinik Yu.O. |
| author_facet | Spodoba M.O. Spodoba О.O. Kovalchuk S.I. Oliinik Yu.O. |
| author_sort | Spodoba M.O. |
| collection | DOAJ |
| description | The aim of the work is to determine the energy-efficient speed level of a two-tier paddle
mixer with blades installed at an angle of 90° to improve the energy efficiency of the biogas formation
process in small biogas reactors. To achieve the set goals, physical methods, three-dimensional model-
ing, processing and visualization of results in application programs were used. The working hypothe-
sis of the research is that 3D modeling will allow determining the nature of the distribution of biomass
flows and the amount of energy expended depending on the rotation speed of the mixing device. The
most important result of the study is the obtaining of graphical dependencies of the trajectories of
movement of elementary volumes and the velocities of substrate flows at different rotation speeds of
the stirrer. The significance of the research results is that, based on the flows of raw materials in the
reactor, it was established that for a reactor with the geometric parameters specified in the work, the
energy-efficient rotation frequency of the paddle mixer with blades at an angle of 90° is within 40…50
rpm. The average speed of the substance is in the range of 0.273 – 0.348 m/s. It was found that the
dependence of the consumed energy on the mixer rotation speed corresponds to a power function. The
percentage of useful energy spent in starting and operating modes for different rotation speeds was
determined. The obtained data can be used for upgrading and designing mixing systems in small bio-
gas reactors. |
| format | Article |
| id | doaj-art-bc34e819018f4e9090f96815265390e1 |
| institution | Kabale University |
| issn | 1857-0070 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Academy of Sciences of Moldova |
| record_format | Article |
| series | Problems of the Regional Energetics |
| spelling | doaj-art-bc34e819018f4e9090f96815265390e12025-08-20T03:58:06ZengAcademy of Sciences of MoldovaProblems of the Regional Energetics1857-00702025-08-0167314115210.52254/1857-0070.2025.3-67.12Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas ReactorsSpodoba M.O.0Spodoba О.O.1Kovalchuk S.I.2Oliinik Yu.O.3National University of Life and Environmental Sciences of Ukraine, Kyiv, UkraineNational University of Life and Environmental Sciences of Ukraine, Kyiv, UkraineNational University of Life and Environmental Sciences of Ukraine, Kyiv, UkraineUniversity of Life and Environmental Sciences of Ukraine, Kyiv, UkraineThe aim of the work is to determine the energy-efficient speed level of a two-tier paddle mixer with blades installed at an angle of 90° to improve the energy efficiency of the biogas formation process in small biogas reactors. To achieve the set goals, physical methods, three-dimensional model- ing, processing and visualization of results in application programs were used. The working hypothe- sis of the research is that 3D modeling will allow determining the nature of the distribution of biomass flows and the amount of energy expended depending on the rotation speed of the mixing device. The most important result of the study is the obtaining of graphical dependencies of the trajectories of movement of elementary volumes and the velocities of substrate flows at different rotation speeds of the stirrer. The significance of the research results is that, based on the flows of raw materials in the reactor, it was established that for a reactor with the geometric parameters specified in the work, the energy-efficient rotation frequency of the paddle mixer with blades at an angle of 90° is within 40…50 rpm. The average speed of the substance is in the range of 0.273 – 0.348 m/s. It was found that the dependence of the consumed energy on the mixer rotation speed corresponds to a power function. The percentage of useful energy spent in starting and operating modes for different rotation speeds was determined. The obtained data can be used for upgrading and designing mixing systems in small bio- gas reactors.https://journal.ie.asm.md/assets/files/12_03_67_2025.pdfenergy consumptionsmall biogas reactorsenergy efficiencymodelingmixingrotation speedflow vectors. |
| spellingShingle | Spodoba M.O. Spodoba О.O. Kovalchuk S.I. Oliinik Yu.O. Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors Problems of the Regional Energetics energy consumption small biogas reactors energy efficiency modeling mixing rotation speed flow vectors. |
| title | Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors |
| title_full | Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors |
| title_fullStr | Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors |
| title_full_unstemmed | Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors |
| title_short | Determination of the Energy Efficient Speed of the Working Body of the Agitator for Small Biogas Reactors |
| title_sort | determination of the energy efficient speed of the working body of the agitator for small biogas reactors |
| topic | energy consumption small biogas reactors energy efficiency modeling mixing rotation speed flow vectors. |
| url | https://journal.ie.asm.md/assets/files/12_03_67_2025.pdf |
| work_keys_str_mv | AT spodobamo determinationoftheenergyefficientspeedoftheworkingbodyoftheagitatorforsmallbiogasreactors AT spodobaoo determinationoftheenergyefficientspeedoftheworkingbodyoftheagitatorforsmallbiogasreactors AT kovalchuksi determinationoftheenergyefficientspeedoftheworkingbodyoftheagitatorforsmallbiogasreactors AT oliinikyuo determinationoftheenergyefficientspeedoftheworkingbodyoftheagitatorforsmallbiogasreactors |