This work objective is to develop and validate an experimental set-up enabling the combustion of bio-oil as well as the characterization of its pollutant emissions. It is part of a global project aiming at recycling Quebec's greenhouses agricultural residues to produce a bio-oil and at burning this bio-oil in boilers used to heat the greenhouses. In order to ensure an energy transition and to reduce the conversion costs of these boilers, it was agreed that a mixture of bio-oil and diesel could be considered as a promising alternative.
The combustion test rig has been designed taking into account the bio-oil characteristics and the various techniques that can improve its combustion (e.g. preheating of combustion air as well as bio-oil, type of injection, generation of Swirl). The experimental set-up assembly was carried out in the TFT laboratory at ÉTS. Its calibration was carried out and include preliminary measurements and calculation methods required to collect combustion’s results.
The characterization of the experimental set-up has been achieved through a series of diesel combustion tests. The operation parameters being studied were the atomization air flow rate, the probe sampling position, the Swirl number and the diesel flow rate. The gaseous pollutant emissions (CO2, CO, C3H8, HCHO, NO and NO2) were analyzed using a Fourier Transform Infrared Spectrometer (FTIR). This characterization allowed understanding the influence of combustion parameters variation as well as the gaseous pollutant emissions overall tendency. The experimental results show that a maximum Swirl (i.e. completely tangential flow) improves the quality of combustion. Thus, a reference state allowing a better combustion with a minimum of unburned gaseous species has been found for a maximum Swirl number and a diesel flow rate of 0.5 LPH. Finally, an analysis of the particulate matters emitted under the reference stage conditions was carried out using a Scanning Mobility Particle Sizer Spectrometer (SMPS).
A bio-oil/diesel emulsion method and a combustion experimental procedure were proposed. The reference state conditions can be used for the future bio-oil/diesel blends combustion.
| Date | 30 Mar 2017 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Patrice Seers (Supervisor) & Stéphane Godbout (Co-supervisor) |
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Elcadhi, S. (Author),
Seers (Supervisor) & Godbout (Co-supervisor),
30 Mar 2017Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering