Real-time monitoring on boiler combustion based on acoustic measurement

Shen, Guoqing; An, Liuming; Jiang, Genshan

doi:10.1109/poweri.2006.1632489

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…In order to study entropy waves under the harsh and hightemperature conditions in gas turbine combustors, a time-of-flight-based temperature measurement method has been developed. Other technical applications of time-of-flight approaches in the field of gas turbines can be found, amongst others, in Kleppe et al, 19 DeSilva et al, 20 or Shen et al 21…”

Section: Dynamic Temperature Measurementmentioning

confidence: 99%

Measurement and modeling of the generation and the transport of entropy waves in a model gas turbine combustor

Waßmer

Schuermans²,

Paschereit

et al. 2017

International Journal of Spray and Combustion Dynamics

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Indirect combustion noise is caused by entropy spots that are accelerated at the first turbine stage. These so-called entropy waves originate from the equivalence ratio fluctuations in the air–fuel mixture upstream of the flame. As entropy waves propagate convectively through the combustion chamber, they are subject to diffusion and dispersion. Because of the inherent difficulty of accurately measuring the burned gas temperature with sufficient temporal resolution, experimental data of entropy waves are scarce. In this work, the transfer function between equivalence ratio fluctuations and entropy fluctuations is modeled by a linearized reactor model, and the transport of entropy waves is investigated based on a convection-diffusion model. Temperature fluctuations are measured by means of a novel measurement technique at different axial positions downstream of the premixed flame, which is forced by periodic fuel injection. Experiments with various flow velocities and excitation frequencies enable model validation over a wide range of parameters.

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Section: Dynamic Temperature Measurementmentioning

confidence: 99%

Measurement and modeling of the generation and the transport of entropy waves in a model gas turbine combustor

Waßmer

Schuermans²,

Paschereit

et al. 2017

International Journal of Spray and Combustion Dynamics

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“…Nonetheless the fundamen-tal difficulty is due to the fact that every temperature sensor introduced into the furnace undergoes a heat transfer with its surroundings not only through convection, but also through radiation, which can considerably distort the measured results. For this reason alternative measurements methods have been developed, including optical methods (optical pyrometry) [7] or acoustic methods (acoustic pyrometry) [8][9][10]. An acoustic temperature field measurement (AGAM) is used in the boiler industry.…”

Section: Measurement Of Exhaust Gas Temperature Distribution Within Amentioning

confidence: 99%

Investigation of exhaust gas temperature distribution within a furnace of a stoker fired boiler as a function of its operating parameters

Krawczyk¹,

Badyda²,

Szczygieł³

et al. 2015

Archives of Thermodynamics

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Distribution of the exhaust gas temperature within the furnace of a grate boiler greatly depends on its operating parameters such as output. It has a considerably different character than temperature distributions in other types of boilers (with pulverised or fluidised bed), as it varies considerably across the chamber. Results presented in this paper have been obtained through research of a grate-fired hot water boiler with a nominal rating of some 30 MW. Measurements have been taken by introducing temperature sensors into prearranged openings placed in the boiler side walls. Investigation has been carried out for different output levels. Tests involved thermocouples in ceramic coating and aspirated thermocouples. The latter were used to eliminate influence of radiative heat transfer on measured results. Values obtained with both methods have been cross-checked.

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“…Shen, L.S. An et al [18] solved the TOF measurement and the reconstruction algorithm of two-dimensional temperature field , which based on cross-correlation analysis and series expansion reconstruction algorithm respectively. In 2006, H. Sielschott [19] used acoustic vector tomography to determine the temperature and flue gas velocity in a large scale furnace.…”

Section: Development Of Acoustic Pyrometrymentioning

confidence: 99%

Application Study on Multiple Acoustic Paths Intersection in Temperature Field Measurement

Chen

Liu

2014

AMR

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Acoustic Pyrometry enables non-intrusive, accurate, reliable gas temperature measurements which can be used for controlling operations on real-time basis, therefore, it particularly applies to hot zones and extremely harsh environments. In the application study on multiple acoustic paths intersection in temperature field measurement, two key techniques that time of flight (TOF) of acoustic waves measurement and temperature field reconstruction were involved. This paper introduces the development of Acoustic Pyrometry, and then focus on two key techniques. The cross-correlation algorithm to calculate the TOF and least-square method for temperature field reconstruction are presented. The advantages and limitations of these techniques are also discussed. Several emerging questions are proposed.

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Real-time monitoring on boiler combustion based on acoustic measurement

Cited by 6 publications

References 3 publications

Measurement and modeling of the generation and the transport of entropy waves in a model gas turbine combustor

Measurement and modeling of the generation and the transport of entropy waves in a model gas turbine combustor

Investigation of exhaust gas temperature distribution within a furnace of a stoker fired boiler as a function of its operating parameters

Application Study on Multiple Acoustic Paths Intersection in Temperature Field Measurement

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