Efficiency of Small Scale Manually Fed Boilers —Mathematical Models
This study reviews test results for a biomass-fired hot water boiler with a nominal boiler thermal power of 120 kW. In the experiments, prismatic wheat straw bales were used as biomass. The impact of the quantity (220, 290, 360 and 430 m<sup>3</sup> h<sup>−1...
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| Format: | Article |
| Language: | English |
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MDPI AG
2012-05-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/5/5/1470 |
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| author | Lazar Savin Milan Tomic Ondrej Ponjican Nebojsa Dedovic Snezana Matic-Kekic Todor Janic Sasa Igic |
| author_facet | Lazar Savin Milan Tomic Ondrej Ponjican Nebojsa Dedovic Snezana Matic-Kekic Todor Janic Sasa Igic |
| author_sort | Lazar Savin |
| collection | DOAJ |
| description | This study reviews test results for a biomass-fired hot water boiler with a nominal boiler thermal power of 120 kW. In the experiments, prismatic wheat straw bales were used as biomass. The impact of the quantity (220, 290, 360 and 430 m<sup>3</sup> h<sup>−1</sup>) of inlet air fed to the boiler firebox was continuously monitored. This was to examine the influence of the quantity of inlet air and recirculation (0, 16.5 and 33%) of combustion products on the boiler thermal power and boiler energy efficiency. Thus, the following mathematical models and formulas were presented: correlation between boiler thermal power and bale residence time; bale mass loss during the combustion process; correlation between boiler energy efficiency and bale residence time. Mathematical models were obtained by using experimental data and by applying nonlinear regression analysis. Adjustment evaluation of mathematical models with experimental data was performed based on the determination coefficient, <em>t</em>-test and <em>F</em>-test. Increase the amount of air throughout the firebox produced boiler thermal power increase and bale residence time decrease. It was shown that combustion products recirculation of 16.5% partly improved boiler characteristics, while the recirculation of 33% did not, comparing with the case without recirculation. |
| first_indexed | 2024-12-10T07:36:37Z |
| format | Article |
| id | doaj.art-a9caf9c493584b13b22f05bc53e040ee |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-12-10T07:36:37Z |
| publishDate | 2012-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a9caf9c493584b13b22f05bc53e040ee2022-12-22T01:57:24ZengMDPI AGEnergies1996-10732012-05-01551470148910.3390/en5051470Efficiency of Small Scale Manually Fed Boilers —Mathematical ModelsLazar SavinMilan TomicOndrej PonjicanNebojsa DedovicSnezana Matic-KekicTodor JanicSasa IgicThis study reviews test results for a biomass-fired hot water boiler with a nominal boiler thermal power of 120 kW. In the experiments, prismatic wheat straw bales were used as biomass. The impact of the quantity (220, 290, 360 and 430 m<sup>3</sup> h<sup>−1</sup>) of inlet air fed to the boiler firebox was continuously monitored. This was to examine the influence of the quantity of inlet air and recirculation (0, 16.5 and 33%) of combustion products on the boiler thermal power and boiler energy efficiency. Thus, the following mathematical models and formulas were presented: correlation between boiler thermal power and bale residence time; bale mass loss during the combustion process; correlation between boiler energy efficiency and bale residence time. Mathematical models were obtained by using experimental data and by applying nonlinear regression analysis. Adjustment evaluation of mathematical models with experimental data was performed based on the determination coefficient, <em>t</em>-test and <em>F</em>-test. Increase the amount of air throughout the firebox produced boiler thermal power increase and bale residence time decrease. It was shown that combustion products recirculation of 16.5% partly improved boiler characteristics, while the recirculation of 33% did not, comparing with the case without recirculation.http://www.mdpi.com/1996-1073/5/5/1470energy efficiencymathematical modelsnon-linear regressionrecirculationwheat straw combustion |
| spellingShingle | Lazar Savin Milan Tomic Ondrej Ponjican Nebojsa Dedovic Snezana Matic-Kekic Todor Janic Sasa Igic Efficiency of Small Scale Manually Fed Boilers —Mathematical Models Energies energy efficiency mathematical models non-linear regression recirculation wheat straw combustion |
| title | Efficiency of Small Scale Manually Fed Boilers —Mathematical Models |
| title_full | Efficiency of Small Scale Manually Fed Boilers —Mathematical Models |
| title_fullStr | Efficiency of Small Scale Manually Fed Boilers —Mathematical Models |
| title_full_unstemmed | Efficiency of Small Scale Manually Fed Boilers —Mathematical Models |
| title_short | Efficiency of Small Scale Manually Fed Boilers —Mathematical Models |
| title_sort | efficiency of small scale manually fed boilers mathematical models |
| topic | energy efficiency mathematical models non-linear regression recirculation wheat straw combustion |
| url | http://www.mdpi.com/1996-1073/5/5/1470 |
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