DOI: 10.5937/jaes14-11010
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.
Volume 14 article 395 pages: 401-408
The aim of this study
is to determine the impact of wood chip fuel moisture content on the overall efficiency
of the power-producing unit of a mobile chipper consisting of a gasifier, the
Stirling engine and a container-dryer. Research of utilization efficiency of
heat emissions of the Stirling engine in a container-dryer has been conducted.
The container-dryer design for wood chip drying due to thermal emissions of the
Stirling engine has been developed. A mathematical model of the autonomous power-producing
unit of mobile chipper functioning with wood chip fuel was developed. In
addition, the physical experiment was conducted to determine the actual moisture
content of wood chips after drying due to thermal emissions of the Stirling
engine. According to the results of the experiments we obtained regression
equations of the efficiency of power-producing unit dependence on the initial moisture
content of biofuels for two cases - with drying in the container-dryer and
without drying. Drying of fire wood chips due to utilization of thermal
emissions of the Stirling engine in a containerdrier of a proposed design
improves the efficiency of the power-producing unit. The reduction of the fuel
wood relative moisture content from 47.5% to 37.5% increases the efficiency by
7.34%, while moisture reduction from 37.5% to 27.5% results in higher
efficiency of only 4.37%, a further reduction in moisture from 27.5% to 17.5%
results in higher efficiency of only 2.47%. Thus, the greatest positive effect
of drying fire wood chips due to heat recovery of the Stirling engine emissions
is observed when using fuel wood with high initial moisture content of more
than 30%.
This work was financially supported by the
Foundation for Assistance to Small Innovative Enterprises in Science and
Technology FASIE.
Anisimov,
P.N., Onuchin, E.M. (2015) Performance assessment and ways of energy efficiency
increase of chip fuel production, Energy production: efficiency, reliability,
safety. Proceedings of XXI All-Russian scientific and technical conference in 2
volumes, 1, 252-255.
Anisimov,
P.N., Onuchin, E.M. (2013) Modelling of the energy supply system of mobile
technological lines for the production of dry fuel wood chips with the partial
usage of the producible biogenic fuel. Polythematic online scientific journal
of Kuban State Agrarian University, 89, 518-530.
Anisimov,
P.N., Onuchin, E.M., Arhipova, A.S. (2016) Development of schematics and design
solutions of biofuel engine for mobile woodchipper, Al.ternativnye istochniki
jenergii v transportnotehnologicheskom komplekse: problemy i perspektivy racional.nogo
ispol.zovanija, 1 (4), 12-16.
Boubaker,
K., Colantoni, A., Longo, L. (2013) Optimizing the Energy Conversion Process:
An Application to a Biomass Gasifier-Stirling Engine Coupling System, Applied
Mathematical Sciences, 7 (139), 6931-6944.
Brammer,
J.G. Bridgwater, A.V. (2002) The Influense of feedstock drying on the
performance and economics of a biomass gasifier-engine CHP system, Biomass and
Bioenergy, 22, 271-281.
Carlsen,
H., Marinitsch, G., Schöch, M., Obernberger, I. (2005) Development of a hot
heat exchanger and a cleaning system for a 35 kW hermetic four cylinder
Stirling engine for solid biomass fuels, Proceedings of the 12th International
Stirling Engine Conference and Technology Exhibition, 1, 144-155.
Coskun, C.
Bayraktar, Z., Oktay, M., Dincer, I. (2009) Energy and exergy analyses of an
industrial wood chip drying process, International Journal of Low-Carbon
Technologies, 4, 224-229.
Erber, G.,
Routa, J., Kolstrom, M., Kanzian, C., Sikanen, L., Stampfer K. (2014) Comparing
Two Different Approaches in Modeling Small Diameter Energy Wood Drying in
Logwood Piles, Croatian Journal of Forest Engineering, 35 (1), 15-22.
Fagernas,
L., Brammer, J., Wilen, C., Lauer, M., Verhoeff, F. (2010) Drying of biomass
for second generation synfuel production, Biomass and Bioenergy, 34, 1267-1277.
Kotowicz
J., Sobolewski A., Iluk T. (2013) Energetic analysis of a system integrated
with biomass gasi"cation, Energy, 52, 265-278.
Lin J.-C.
M. (2007) Combination of a Biomass Fired Updraft Gasi"er and a Stirling
Engine for Power Production, Transactions of the ASME, 129, 66-70.
Rajvanshi,
A. (1986): Biomass gasification, Alternative Energy in Agriculture , 2, 83-102.
Ravich M.
B. (1966) The simplified methodology of thermotechnical calculations, Moscow:
Science.
Rokni M.
(2015) Thermodynamic analyses of municipal solid waste gasi"cation plant
integrated with solid oxide fuel cell and Stirling hybride system,
International journal of hydrogen energy, 40 (24), 7855-7869.
Sato K,
Ohiwa N. (2006) Research and development of Stirling engine power generating
system using biomass. Proceedings of the tenth symposium on Stirling cycle,
Yokohama, Japan: Kanagawa University.
Tokarev
G.G. (1955) Gas producer vehicles, Moscow: Engineering.
Truhov,
B.S., Tursunbaev, I.A., Umarov, S.Ja. (1979) Calculation of an heat-transfer
loop parameters of the Stirling engine, Tashkent: Fan.
Vedernikova,
M.I., Orlov, V.P., Terent.ev, V.B. (2001) Design of drying system for drying of
the disintegrating wood, Part 1. Technological and hydrodynamic calculations of
dryers, Yekaterinburg: UGLTA.
Zainal,
Z.A. Ali, R., Lean, C.H., Seetharamu, K.N. (2001) Prediction of performance of
a downdraft gasifier using equilibrium modeling for different biomass
materials, Energy convertion and management, 42, 1499-1515.