University of Twente Student Theses


Techniques for in-flame measurements

Geerligs, H. (2016) Techniques for in-flame measurements.

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Abstract:The large quantity of CO2 emitted into the atmosphere each year leads to the greatest overall contribution to the greenhouse effect of any pollutant. The combustion of pulverized coal in conventional utility boilers is believed to contribute about 10% to the enhanced greenhouse effect. Fossil fuel fired power stations are targeted for application of CO2 removal technologies because they represent easily identifiable point sources. A solution is separation of the CO2 from the flue gas and non-atmospheric disposal. Because air is used as the comburent, the post-combustion gas contains approximately 15% CO2. The low CO2 concentration, due to the high N2 concentration, makes CO2 separations techniques very energy-intensive and expensive. The process of separating and recovering the CO2 can be simplified if the flue gas CO2 concentration is maximized by minimizing the N2 concentration. To increase the CO2 concentration, oxy fuel technology is introduced. The combustion air is replaced by a mixture of O2 and recycled flue gas (RFG). The RFG is required to control the combustion temperature. Theoretically this could lead to a post-combustion gas with a CO2 concentration in the order of 95%. The RELCOM project (Reliable and Efficient Combustion of Oxygen/Coal/Recycled Flue Gas Mixtures) aims to further develop the oxy-fuel technology. It undertakes a series of applied research, development and demonstration activities involving both experimental studies and combustion modelling work. The internship revolves around large scale experiments at the 20MWth CIUDEN facility. IFRF is assigned to take in-flame measurements. The objective is to provide information on the performance of newly designed burners in different modes of operation. To analyse in flame conditions measurement probes are inserted through ports in the boiler wall. Measurements of temperature, heat flux and gas composition are taken at different positions in the boiler for three different burner configurations. The data is processed and results are presented together with an analyses of experimental accuracy.
Item Type:Internship Report (Master)
International Flame Research Foundation, Italy
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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