ATAC i system - Energimyndigheten

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Results: The project started in May 2000. The student working on the theoretical part of the project is Christophe Duwig. He has been during this period working with the code for computing mixing and developing the modeling for the combustion. The initial results of the calculations have now been accepted for a conference publication. The experimental part of the project has now been boosted by employing Andrei Secareanu and by installing the new measuring equipment (comprising 3 new lasers). The collaboration with Alstom Power (AP) implies that AP provides several burner geometries for studies. In addition, AP has provided us with the first burner and some peripheral equipment. This mixing section of this burner has no direct optical access, but one can access the combustion zone. A second burner is being constructed. This burner will enable access also to the pre-reacting zone. The results up to now include the study of the turbulent flow and mixing (including differential diffusion) in an AP burner. We have also added some features (handling premixed flames) to the LES combustion code. Further work is ongoing on the old (3 sriler AP) burner and the one that is rigged for measurements. Some of the results are to be presented in an international conference later this summer. Conclusions: Since the project has just passed the start-up phase one cannot draw any major conclusions as yet. The work proceeds roughly along the lines presented in the applications, with the exception of the experimental part. The delay in the experiments has been caused by the delay in obtaining the AP burner. To compensate for that delay we have considered (and shall do further work) on the TURBEC rig that has used for measuring certain components under hot conditions. After the start-up period we expect at least a couple of international publications this year. Future work: At this stage we intend to continue the work as planned. The work shall include theoretical work supported by experiments: 1. LES of turbulent flow, mixing and combustion in the related burner geometries. 2. Two small premixed, swirl stabilized burner for models shall be studied experimentally for validation purposes. The rigs will be used both in confined and non-confined modes. The second burner will have a better optical access also in the hot confined case. The rigs is to be used to measure the velocity field (PIV) and concentration fields of OH- and CHradicals (by LIF) simultaneously. The data shall be used for determining directly the Sub- Grid-Scale (SGS) terms in LES and the Reynolds stresses and turbulent fluxes in the RANS framework. 3. An option that was discussed with AP included the use of a water swirling-flow “burner” model. This rig is to be used for studying flow instabilities in the burner and their effect on turbulent mixing. The rig is to have optical access for PIV, LDV and LIF measurements. This approach will enable us to study easily the details of the flow (also experimentally) inside the swirling zone that is not accessible in the “hot” burners. In addition, we expect that AP shall provide us with FLUENT results so as to compare our LES models and results with their existing “state of the art”.
High Pressure Catalytic Combustion Projekt nr: P12458-2 Projektledare: Prof. Torsten Fransson Projektdeltagare: Tekn.lic. Jan Fredriksson (HPT) 50%, Katarina Persson (KT) 100 % och Jeevan Jayasuriya (HPT) 100%. Prof. Sven Järås (KT) handleder Katarina Persson. Etappens varaktighet: 2001-04-01 till 2002-03-31 Beviljade medel: 2 000 000 kr Referensgrupp: Rolf Gabrielsson, VAC, Mats Westermark, (KT/KTH), Mats C Andersson (Alstom Power), Timothy Griffin (Alstom Power) Magnus Callavik (ABB Corporate Research), Jürgen Jacoby (HPT/KTH), Philippe Thevenin (KT/KTH) ___________________________________________________________________________ Project description: An application for a mainly experimental project on high-pressure catalytic combustion at for Gas Turbines was handed in to STEM and a six-month pre-study period was granted. Experiments are planned for several types of catalysts at low and high humidity levels of up to 0.3 kg steam per kilo dry air and pressures of up to 35 Bar. Fuels to be tested include gasified biomass and natural gas, Tests will be performed in bench scale tests with fuel power input of up to 100 kW, with air pre-heating temperatures of up to 600°C. An existing test rig has to be modified for these experiments. Project goal: The goal of the project is to deliver high quality global experimental data on combustion stability and emissions for catalytic combustors using • various different catalyst configurations • various fuels in air with high humidity, up to 0.3 kg of steam per kg dry air. • at pressures from atmospheric, up to 35 Bars • at air inlet temperatures of up to 500 °C Publish two Tekn.Lic thesis and three Ph.D thesis. • Tekn. Lic thesis At the end of second year of the project, by March 2003, Jeevan Jayasuriya (HPT/KTH) and Katarina Persson (KT/KTH) would complete their licentiate thesis. • Ph.D thesis By the end of year 2003, Jan Fredriksson (HPT/KTH), would complete his Ph.D thesis. By the end of year 2005, Jeevan Jayasuriya (HPT/KTH) and Katarina Persson (KT/KTH) would complete their Ph.D thesis. Results: Test rig is assembly is partly completed. Most of the hardware has been delivered. Ceramic reactor tube assembly yet to be delivered. Delivery is scheduled on the second week of March 2002. Compressed air, cooling water, fuel supply, exhaust, electricity and control <strong>system</strong>s are designed and partly installed. Catalysts to be tested in the first phase of experiments have been developed and tested.
Page 1 and 2: ATAC i system Projekt nr: P10025 -
Page 3 and 4: I Figur 2 visas ett exempel där 10
Page 5 and 6: Termodynamiska data för luft-vatte
Page 7 and 8: 2002-02-22 liquid components were a
Page 9 and 10: Dimensionering av befuktare för ev
Page 11 and 12: Slutsatser. Utfall i relation till
Page 13 and 14: Rekuperatorer för Gasturbinanlägg
Page 15 and 16: Blomgren) har skett här och viss a
Page 17 and 18: Expertsystem baserat på ANN: Metod
Page 21 and 22: med en vanlig luftpump (cykel, bil)
Page 23 and 24: Biobränslebaserad småskalig kraft
Page 25 and 26: These findings together with the di
Page 27 and 28: stirlingmotorer för andra ändamå
Page 29 and 30: Projektets mål (Project goal): Fö
Page 31 and 32: Analys och optimering av avancerade
Page 33 and 34: Biomass and Natural Gas. Increased
Page 35 and 36: cycles, repowering of old steam uni
Page 37 and 38: Systemstudier av kraftcykler med Ch
Page 39 and 40: compensated by the steam cycle. The
Page 41: Development of tools for the design
Page 45 and 46: combustion catalysts. The incipient
Page 47 and 48: Project goal: The overall objective
Page 49 and 50: pressure ratio of 2.7. Above a pres
Page 51 and 52: Förbränning för koldioxidfria pr
Page 53 and 54: 3 candidate, the measurement strate
Page 55 and 56: Dynamisk processimulering för opti
Page 59 and 60: Nedan anges viktiga delmål, dvs de
Page 61 and 62: Behov av fortsatta forskningsarbete
Page 63 and 64: Katalytisk förbränning av förgas

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