Concurrent measurements of temperature and soot concentration of pulverised coal flames

Author

Lu, G. ; Bheemul, H.C. ; Yan, Y.

Author_Institution

Adv. Instrum. & Control Res. Centre, Univ. of Greenwich, Kent, UK

Volume

2

fYear

2001

fDate

2001

Firstpage

1221

Abstract

This paper presents a novel instrumentation system for the concurrent measurements of temperature and soot concentration of pulverised coal flames. The system operates on the two-colour principle combining advanced optical sensing and digital image processing techniques. The temperature of a flame is calculated from the ratio between the grey-levels of corresponding pixels within two images captured at two different wavelengths. The soot concentration of the flame is estimated using the KL factor which is derived from the intermediate information obtained during the temperature measurement. The prototype system has been evaluated on a 0.5 MW_th coal-fired furnace. Experimental results obtained show that the system is capable of measuring the instantaneous, two-dimensional distributions of the temperature and soot concentration of the flame with a reasonable accuracy

Keywords

CCD image sensors; air pollution measurement; chemical variables measurement; combustion; computerised instrumentation; flames; furnaces; high-temperature techniques; image processing; pulverised fuels; spectral methods of temperature measurement; spectrochemical analysis; CCD camera; KL factor; advanced optical sensing; coal-fired furnace; concurrent measurement; digital image processing; instantaneous two-dimensional distributions; instrumentation system; optical probe; pulverised coal flames; soot concentration measurement; spectral sensitivity; temperature measurement; two-colour principle; Digital images; Fires; Furnaces; Instruments; Optical sensors; Pixel; Prototypes; Temperature measurement; Temperature sensors; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928270

Filename

928270