Application software for calculating heat transfer in the furnace and the following heat surfaces
When new boiler equipment is designed or modifications of an existing facility are planned it is necessary to make heat and mass balance of the boiler and of the pulverized coal system.
ТОТЕМА has developed its own universal software product for calculating the heat exchange in water heating and steam generating boilers, firing solid, liquid or gas fuels. The product determines the efficiency of the boiler as well as the fuel, water, steam, air and flue gas flows.
The temperature of the flue gas along the height of the furnace is determined by taking into consideration step by step (staged) feeding of the fuel and air and the fuel combustion “by zones”. It is a simple and reliable method of successive approximations, which was developed by ТОТЕМА in compliance with the requirements for the distribution of the coal powder and the drying gas along the height of the furnace and the technology of efficient combustion of pulverized coal with low emissions of nitrogen oxides. The method allows calculating the temperatures of the flue gases and the concentration of oxygen along the height of the furnace as well as assessing the required conditions for maintaining efficient combustion, so that low enough and relatively constant temperatures of the flue gas are obtained along the height of the furnace to prevent slagging and minimize nitrogen oxide formation.
TOTEMA’s method of calculating heat transfer in the furnace “by zones” has been developed and verified for coal fired furnaces with tiered burners, without constraints as to the size of the furnace or the coal grade.
The drop in temperatures along the gas duct beyond the furnace is calculated by iteration.
The boiler parameters estimated by the heat calculations of TOTEMA coincide with sufficient accuracy with the operation results.
Application software for calculating the heat balance of steam generators and district heating boilers fired with solid, liquid or gas fuels
The software, developed in compliance with DIN 1942/1994 standards for Guarantee Performance Testing of Boilers, is used for processing the results of the operation tests of boilers – - for guarantee performance testing, for assessing the condition of different boiler elements, for assessing the quality of repair works, for assessing the technical and efficiency parameters.
Application software for calculating pulverized coal system heat balance
The software is used for developing new projects and selecting technologies and equipment for coal processing (grinding and drying) as well as for assessing the condition and the capacity of the existing equipment when the quality of fuel or the heat output of the boiler are changed.
Combined with the “by zone” calculation of the heat transfer in the furnace, it gives input data for accurate calculation of the thermal characteristics of the heat exchange surfaces.
Research, consultancy and technical assistance
Power Complex Rehabilitation Project in Bulgaria - in partnership with Overseas Bechtel Incorporated, US.
• Evaluation of Energy Price Subsidies - jointly with Gilbert/ Commonwealth, US
• Bulgarian Clean Coal Project - jointly with EERC, US
• Options of Imported Coal Supply for Varna TPP - jointly with IEEC, UK
• Technical and Efficiency Sssessment of the Conversion Project for Varna TPP
• Consultant of PB Power UK in “Maritza East 3” TPP 210 MW Units Refurbishment Specification.
• Initial Performance Tests of 210 MW units at Maritza East 3 TPP, jointly with German VEAG and E.ON
• Technical cooperation in the post rehabilitation acceptance tests of the 210 MW units of Maritza East 3 TPP, jointly with German E.ON and Italy’s Enel.