NDLI: Combustion Chamber for a Directly Wood Particle Fired Gas Turbine

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Pelzmann, Mario Haselbacher, Hermann
Copyright Year	2002
Abstract	Most of the processes using wood fuels in gas turbine applications that are presently being studied are based on gasification of the wood fuel and operating the gas turbine with the product gas. An alternative is running the gas turbine with the hot gas from a wood combustor — the directly wood particle fired gas turbine. This technique offers the possibility to realise efficient and cost effective small scale power generation systems in the low power range (1–2 MWe). For realizing a directly wood particle fired gas turbine, the Institute of Thermal Turbomachines and Powerplants at the Vienna University of Technology developed a two stage combustor. Solid and liquid fuels require relatively long residence times and good mixing with the oxidant to be completely burned. This can be achieved in the primary stage designed as a cyclone combustor/gasifier. In the cyclone chamber, burning fuel particles are suspended, according to their size, caused by centrifugal and drag forces. This cyclone effect of the flow offers the possibility that big particles remain in the cyclone combustor until they have been completely burned. Using a two stage combustor, the combustion process can be divided into two zones: A primary zone for fuel-rich pyrolysed-gasified-combustion and a secondary zone where the gasification products from the primary zone are oxidized with excess air. Staged combustion has the potential to reduce NOx (NO, NO2 and N2O), CO and total hydrocarbons CnHm concentrations in the exhaust. A large series of test runs was carried out with 3 different fuels, numerous fuel feed rates and equivalence ratios in the cyclone combustor resulting in stable operating conditions and almost total carbon burn-out. The main purpose of the test runs was to investigate the effect of air staging and temperature on the emissions of CO, CnHm and NOx.
Sponsorship	International Gas Turbine Institute
Starting Page	423
Ending Page	428
Page Count	6
File Format	PDF
ISBN	0791836061
DOI	10.1115/GT2002-30076
e-ISBN	0791836010
Volume Number	Volume 1: Turbo Expo 2002
Conference Proceedings	ASME Turbo Expo 2002: Power for Land, Sea, and Air
Language	English
Publisher Date	2002-06-03
Publisher Place	Amsterdam, The Netherlands
Access Restriction	Subscribed
Subject Keyword	Temperature Turbomachinery Combustion Energy / power systems Drag (fluid dynamics) Fuels Carbon Flow (dynamics) Emissions Exhaust systems Gas turbines Particulate matter Wood products Nitrogen oxides Power stations Combustion chambers Fuel gasification
Content Type	Text
Resource Type	Article

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