PAPERS SELECTED FOR THE SYMPOSIUM

• ENERGY TRANSFORMATIONS AND GHG EMISSION MITIGATION OPTIONS IN MACEDONIA

  R. V. Filkoski, I. J. Petrovski, B. S. Avramovska - University „Sts Cyril and Metodius”, Faculty of Mechanical Engineering

  Abstract Text

  Abstract: The energy transformations are by far the largest source of greenhouse gases (GHG) emission in the Republic of Macedonia. The paper is a result of an analysis of GHG emission by sectors, consisting of GHG emission inventory, mitigation analysis... show full text »
  Abstract Text

  Abstract: The energy transformations are by far the largest source of greenhouse gases (GHG) emission in the Republic of Macedonia. The paper is a result of an analysis of GHG emission by sectors, consisting of GHG emission inventory, mitigation analysis and action plan. The analysis was provided in the framework of the preparation of the Second National Communication towards the UN Framework Convention on Climate Change. Some possibilities and options have been envisaged for reduction of emission of CO2 and other gases that cause the greenhouse effect, and that originate from the energy transformations in the power generation, industry, residential, public, commercial, agricultural and other sectors. Considering the overall actual situation in the energy sector, as well as the limited domestic energy resources, the general conclusion is that, the possibilities for significant reduction of CO2 emission in this segment, in middle term, are not huge, but they are not insignificant. On the other hand, there are very good opportunities for proposing qualitative projects in the framework of the Kyoto Protocol Clean Development Mechanism (CDM). « hide
  Symposium Session: Environmental aspects of power generation | Ekološki i klimatski aspekti rada elektrana

• LOCAL TEMPERATURE PROFILES IN A UTILITY BOILER

  R. V. Filkoski*, I. J. Petrovski*, L. Joleska Bureska** - University „Sts Cyril and Metodius”, Faculty of Mechanical Engineering

  Abstract Text

  Much thought is given nowadays to increasing the overall energy efficiency of the energy facilities and to reducing the amount of various harmful materials emitted into the atmosphere when burning fossil fuels. One of the ways to improve the overall... show full text »
  Abstract Text

  Much thought is given nowadays to increasing the overall energy efficiency of the energy facilities and to reducing the amount of various harmful materials emitted into the atmosphere when burning fossil fuels. One of the ways to improve the overall operational efficiency of the pulverised coal-fired boilers is a reduction of the heat loss due to inefficient combustion and to reduce the emission of pollutants. The both tasks can be obtained with appropriate redistribution of the air inlet, including implementation of over-fire-air (OFA) system. The paper considers the effect of combustion with OFA introduction to the characteristics of the process in a boiler furnace. The overall framework and the initial computational fluid dynamics (CFD) analysis of the aerodynamic behaviour of the gas-solids mixture, combustion efficiency, temperature profiles and gas concentrations are described. The numerical results obtained with CFD modelling technique are compared with a measurements test matrix of seven operating conditions. The main parameters that were changed are OFA quantity, coal type, load and burner tilt. Although this is just an initial research phase, comparisons of numerically obtained and measured temperature profiles are encouraging. The data regarding the near-burner and OFA regions showed evidence of reduced swirl as over-fire air was increased. « hide
  Symposium Session: Power Plants life cycle extension, new clean coal technologies | Produženja radnog veka elektrana i novih ekološki čistih tehnologija