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The use of optical flame scanners for combustion process analysis in OP-650 power boiler

Nabagło D., Podgórski P., Janda T., Sokołowski P.

Archivum Combustionis

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2015

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Vol. 35 nr 2

99--116

EN

Optical flame scanners are commonly used in flame supervision systems (FSS) for the purpose of protection against of flame loss inside the combustion chamber. The presence or absence of flame is indicated by the scanner according to analysis of electromagnetic radiation changes in the wavelength range 700÷1700 nm emitted by supervised flame. The use of digital signal processing technology in IR spectrum allows to recognize the supervised flame with very high ability and allows to use the signals for combustion process analysis. Electromagnetic field disturbances in the infrared due to changes in the flame, are determined by the combustion process properties in burner zone i.e. the burner heat load, excess air ratio, temperature of PF mixture, the amount and swirl of primary and secondary air. The ability of use the information provided by the scanners - in this unique parameters supervised flame i.e. flame temperature, power spectral density and the radiation amplitude changes - became the basis for the initiation of studies regarding the optical flame scanners use for combustion process analysis. The paper presents the first results of work on the use of optical flame scanners in the analysis of combustion process in 650 t/h live steam power boiler in EDF Power Plant in Rybnik. The boiler is supplied by 5 coal mill units, each of coal mills supplies 4 pulverized coal burners (PF burners). The boiler has a start-up installation consisting of 12 heavy oil burners placed in PF burners and individually controlled by 12 flame scanners. Based on the analysis of the measuring data obtained from scanners an assessment of the quality of the combustion process for 2 coal mill units (8 PF burners) have been done.

2

Ultrasound Transmission Tomography Imaging of Structure of Breast Elastography Phantom Compared to US, CT and MRI

Opieliński K. J., Pruchnicki P., Gudra T., Podgórski P., Kraśnicki T., Kurcz J., Sąsiadek M.

Archives of Acoustics

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2013

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Vol. 38, No. 3

321--334

EN

The paper presents an analysis of the results of ultrasound transmission tomography (UTT) imaging of the internal structure of a breast elastography phantom used for biopsy training, and compares them with the results of CT, MRI and, conventional US imaging; the results of the phantom examination were the basis for the analysis of UTT method resolution. The obtained UTT, CT and MRI images of the CIRS Model 059 breast phantom structure show comparable (in the context of size and location) heterogeneities inside it. The UTT image of distribution of the ultrasound velocity clearly demonstrates continuous changes of density. The UTT image of derivative of attenuation coefficient in relation to frequency is better for visualising sharp edges, and the UTT image of the distribution of attenuation coefficient visualises continuous and stepped changes in an indirect way. The inclusions visualized by CT have sharply delineated edges but are hardly distinguishable from the phantom gel background even with increased image contrast. MRI images of the studied phantom relatively clearly show inclusions in the structure. Ultrasonography images do not show any diversification of the structure of the phantom. The obtained examination results indicate that, if the scanning process is accelerated, ultrasound transmission tomography method can be successfully used to detect and diagnose early breast malignant lesions. Ultrasonic transmission tomography imaging can be applied in medicine for diagnostic examination of women’s breasts and similarly for X-ray computed tomography, while eliminating the need to expose patients to the harmful ionising radiation.

3

Metodyka odtwarzania geometrii zabytkowych obiektów techniki na przykładzie silnika samochodu Mikrus MR-300

Podgórski P., Płocica M.

Mechanik

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2012

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R. 85, nr 2CD

PL

W artykule zaproponowano metodykę odtwarzania geometrii zabytkowych obiektów technicznych o szczególnej wartości historycznej. Zwrócono uwagę na korzyści, wynikające z cyfrowej archiwizacji danych na każdym etapie odbudowy obiektu. Przedstawiono przykład w postaci rekonstrukcji geometrii głowicy silnika samochodu Mikrus MR-300.

EN

The article proposes a methodology for reconstruction of geometry of technical objects, which have a special historical value. Highlighted the advantages of the digital archiving of data at each stage of the reconstruction. As an example in the form of reconstruction of the geometry, a car Mikrus MR-300 engine head was presented.

4

Tomografia komputerowa wieloenergetyczna : podstawy działania i główne zastosowania kliniczne

Kraśnicki T., Guziński M., Podgórski P., Sąsiadek M.

Inżynier i Fizyk Medyczny

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2012

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Vol. 1, nr 4

181--183

PL

W dobie szybkiego rozwoju technologii komputerowych nastąpił gwałtowny postęp związany z technikami obrazowania w medycynie. Miniaturyzacja podzespołów oraz znaczne przyspieszenie wydajności komputerów otworzyły drzwi do nowych możliwości związanych z polepszeniem jakości obrazów diagnostycznych, m.in. w tomografii komputerowej (TK). Innowacyjne technologie i rozwiązania pozwalają na zastosowanie nowych technik otrzymywania obrazów TK o wyższej jakości przy jednocześnie zwiększonej ochronie pacjenta.