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Show », R-di__on ^ Conv%ct_n ^ &_ !_«____ ^ t * I * , l Confcmtx- 4 f Tl * 1 Hutm_lo_ C ___t_n * } 1 I fl_ pCCXUCtS Dimensions of Enclosure (metres) Length | TOO Width | ioo Heightl TOO Dimensions of Vent (metres) Width 1 100 Height j ioo i Fuel Flow Rate (kg/s) 1 i.o Nozzle Diameterfm) 1 io Radial Distance From Centre(m) 1 i o ... _ornpU_ | _ M * V 4 _ M | Eat Figure 10 : BG Technology's zone model working in a PC Windows environment to the PC environment and provide practical engineering solutions for minimum hardware investment. They are clearly of limited use for certain problems where, for example, flow-prediction is required and for processes with steep temperature gradients. Fortunately, the latter situation is becoming much less c o m m o n because current strategies for N O x reduction, for example FGR, often involve improving the uniformity of combustion regions. Computational Fluid Dynamics (CFD):- Opportunities for the exploitation of CFD modelling have been opened up, again due to the advances in computing power. These are most commonly used for steady-state simulations, and simulations can be performed by using two or three dimensions. Constant refinements are being made to CFD sub-models, for example to the turbulence and kinetics models. In addition, attempts are also being made to reliably predict emissions from combustion equipment prior to manufacture. Summary <& Conclusions • BG Technology, over many years, has been actively involved in the development and commercialisation of high efficiency gas systems for high temperature furnaces. • BG Technology involvement continues today, however new environmental pressures on other types of emission, such as N O x , have required increasingly creative responses with regards to technology. |
