Efficiency of Small Scale Manually Fed Boilers —Mathematical Models
| Autor: | Snezana Matic-Kekic, Todor Janić, Lazar Savin, Milan Tomić, Saša Igić, Ondrej Ponjičan, Nebojsa Dedovic |
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| Rok vydání: | 2012 |
| Předmět: |
Engineering
wheat straw combustion Control and Optimization 020209 energy Energy Engineering and Power Technology Thermal power station non-linear regression 02 engineering and technology 010501 environmental sciences lcsh:Technology 01 natural sciences 7. Clean energy jel:Q40 Bioenergy jel:Q jel:Q43 recirculation jel:Q42 0202 electrical engineering electronic engineering information engineering jel:Q41 energy efficiency mathematical models jel:Q48 jel:Q47 Electrical and Electronic Engineering Engineering (miscellaneous) 0105 earth and related environmental sciences jel:Q49 geography geography.geographical_feature_category Waste management Mathematical model lcsh:T Renewable Energy Sustainability and the Environment business.industry Boiler (power generation) jel:Q0 Inlet jel:Q4 Renewable energy business Nonlinear regression Energy (miscellaneous) Efficient energy use |
| Zdroj: | Energies Volume 5 Issue 5 Pages: 1470-1489 Energies, Vol 5, Iss 5, Pp 1470-1489 (2012) |
| Popis: | 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 m3 h−1) 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, t-test and F-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. |
| Databáze: | OpenAIRE |
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