University of Twente Student Theses


Oxycoal combustion tests in CIUDEN

Broenink, W.A. (2016) Oxycoal combustion tests in CIUDEN.

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Abstract:As part of the Relcom project, IFRF was tasked to perform full characterization of Oxycoal combustion inside a 20MWt experimental furnace, made available by CUIDEN. The objective of this report is to describe the processing of the temperature and heat flux results obtained in the measurement campaign in CUIDEN. In addition, present a calibration procedure for both the radiative heat flux meter and total heat flux meter using the black body furnace. In total, 3 different operation conditions are characterized, the air base mode and two different oxy combustion modes. This is done by measuring temperature and chemical composition at multiple ports and multiple insertion depths. Heat flux measurements are taken in ports along the furnace walls. In order to measure the inflame characteristics probes and data recovery equipment are used. The probes relevant to the measurement of the total heat flux, radiative heat flux and temperature are the Total heat flux meter, ellipsoidal radiometer and the suction pyrometer respectively. The data recovery equipment consists of the 34970A data logger and corresponding software called free Benchlink datalogger software which are able to measure the different signals from the probes. The total heat flux meter and ellipsoidal radiometer require calibration in order to convert the signals into the corresponding heat fluxes. This is done using a black body furnace located in the IFRF workplace. The calibration is performed both before and after the measurement campaign and the results averaged. Together with processing of the data the performances and error estimations for the heat flux probes were obtained. After processing of the obtained data from the measurement campaign results for the heat flux and temperature are obtained. Results for the heat flux are presented as the heat flux values and corresponding errors versus the exhaust path. Temperature results are presented as temperature values versus the boiler axis distance. It can be concluded that the furnace was able to maintain the Temperature and heat extraction when introducing Oxycoal combustion. Therefore avoiding the formation of NOx and the introduction of thermal strain of the furnace walls and burner.
Item Type:Internship Report (Master)
International Flame Research Foundation, Italy
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Keywords:measurement campaign, calibration, data processing, in-flame measurements
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