Publication detail
Biodiesel (EN 14213) heating oil substitution potential for petroleum based light heating oil in a 1 MW stationary combustion facility
KERMES, V. BĚLOHRADSKÝ, P.
Czech title
Možnost náhrady topného oleje pomocí biodieslu na 1 MW stacionárním spalovacím zařízení
English title
Biodiesel (EN 14213) heating oil substitution potential for petroleum based light heating oil in a 1 MW stationary combustion facility
Type
journal article - other
Language
en
Original abstract
The aim of the present work was to experimentally investigate the combustion properties of methyl-ester of rapeseed oil (RME) that was preheated for three distinct temperatures ((30, 70, 110) deg.C) in the study. The experiments were carried out in a water-cooled horizontal combustion chamber with a nominal thermal load of 1500 kW. The experimental results were compared to the results obtained from the combustion tests with extra light heating oil (ELHO) that was used as a comparative fuel. The fuel was atomized by means of the twin-fluid effervescent atomizer with a maximal output of 100 kg/h of oil at gas to liquid mass flow rate ratio (GLR) equals to 20%. Primarily the experiments were focused on the investigation of the flame characteristics and the quality of combustion at distinct heat outputs ((475, 700, 900) kW) and distinct GLR ratios ((10, 15, 20) %). Second, experiments focused on the evaluation and comparison of local wall heat fluxes along the flame length and were performed only for one setting of operating conditions, namely for the heat output of 900 kW and the GLR 15%. The results revealed that substitution of ELHO requires preheating of RME to the temperature of about 70 deg.C, if pneumatic atomization is to be used. The preheating of RME to higher temperature did not show any significant improvement in terms of quality of combustion. Moreover, it causes the increase in nitrogen oxides formation up to 60% in comparison with the values measured during ELHO combustion.
Czech abstract
Článek popisuje zkoušky spalování methylesteru řepkového oleje (MEŘO) při různých teplotách předehřevu (30, 70 a 110 st.C) a srovnání výsledků se spalováním extra lehkého topného oleje (ELHO) na vodou chlazené spalovací komoře s nominálním tepelným zatížením 1500 kW. Pro atomizaci paliva do spalovacího prostoru byla využita dvoumédiová effervescentní tryska s maximálním výkonem cca 100 kg/h oleje při poměru atomizační médium/kapalné palivo (GLR) 20% instalovaná na kombinovaném hořáku (plyn-olej). Při zkoušce bylo zkoumáno chování plamene a kvalita spalování při různých výkonech (475 kW, 700 kW a 900 kW) a GLR (10, 15 a 20%). Pro atomizaci byl použit nepředehřátý spalovací vzduch. Dále byly provedeny zkoušky spalování při výkonu 900 kW a GLR 15% s cílem porovnat absorpci tepla do pláště spalovací komory. Z výsledků zkoušek vyplývá, že pokud by mělo být uvažováno o náhradě ELHO pomocí MEŘO, bude nezbytné zajistit jeho předehřev na hodnotu kolem 70 st.C, pokud by mělo být použito pneumatické atomizace. Předehřev RME na vyšší teplotu neprokázal výrazné zlepšení kvality spalování, avšak je příčinou až o 60% zvýšené tvorby oxidů dusíku ve srovnání s hodnotami naměřenými při spalování ELHO.
English abstract
The aim of the present work was to experimentally investigate the combustion properties of methyl-ester of rapeseed oil (RME) that was preheated for three distinct temperatures ((30, 70, 110) deg.C) in the study. The experiments were carried out in a water-cooled horizontal combustion chamber with a nominal thermal load of 1500 kW. The experimental results were compared to the results obtained from the combustion tests with extra light heating oil (ELHO) that was used as a comparative fuel. The fuel was atomized by means of the twin-fluid effervescent atomizer with a maximal output of 100 kg/h of oil at gas to liquid mass flow rate ratio (GLR) equals to 20%. Primarily the experiments were focused on the investigation of the flame characteristics and the quality of combustion at distinct heat outputs ((475, 700, 900) kW) and distinct GLR ratios ((10, 15, 20) %). Second, experiments focused on the evaluation and comparison of local wall heat fluxes along the flame length and were performed only for one setting of operating conditions, namely for the heat output of 900 kW and the GLR 15%. The results revealed that substitution of ELHO requires preheating of RME to the temperature of about 70 deg.C, if pneumatic atomization is to be used. The preheating of RME to higher temperature did not show any significant improvement in terms of quality of combustion. Moreover, it causes the increase in nitrogen oxides formation up to 60% in comparison with the values measured during ELHO combustion.
Keywords in Czech
Spalování; Extra lehký topný olej; Methyl-ester řepkového oleje; Emise; Stabilita hoření; Přenos tepla
Keywords in English
Combustion; Extra light heating oil; Methyl-ester of rapeseed oil; Pollutant emissions; Burning stability; Heat transfer
RIV year
2013
Released
01.02.2013
Publisher
Elsevier Ltd.
Location
United Kingdom
ISSN
0961-9534
Volume
2013
Number
49
Pages from–to
10–21
Pages count
13
BIBTEX
@article{BUT97242,
author="Vít {Kermes} and Petr {Bělohradský},
title="Biodiesel (EN 14213) heating oil substitution potential for petroleum based light heating oil in a 1 MW stationary combustion facility",
year="2013",
volume="2013",
number="49",
month="February",
pages="10--21",
publisher="Elsevier Ltd.",
address="United Kingdom",
issn="0961-9534"
}