Welcome to our Website! Here the interested expert and other public have an access to what was thus far an exclusive domain of a few dedicated specialists. The specialized software tool for a thermodynamic calculations of fossil fuel fired boilers has been developed. It is based on the new theoretical findings on heat transfer in boilers with proven +/-2% uncertainty (see Underlying theory tag for more explanation). It can be applied to carry out tasks like these:
HEAT TRANSFER ANALYSIS IN BOILER OF GIVEN DESIGN FIRED WITH ANY FOSSIL FUEL OR EXHAUST GAS (WASTE HEAT RECOVERY BOILER) FOR ANY OPERATING CONDITIONS (PRESSURE / WATER TEMP., COMBUSTION AIR TEMP., EXCESS AIR / REST OXYGEN, FLUE GAS RECIRCULATION ETC.).
BOILER DESIGN OPTIMIZATION.
SOFTWARE ALSO ACCEPTS MIXTURE OF TWO SOLID FUELS. THIS WAY A BOILER FIRED WITH TWO FUELS AS FOUND IN COAL POWER PLANTS WHERE BIOMASS OR WASTE DERIVED FUEL (RDF) IS COFIRED WITH COAL CAN BE HANDLED.
There is no limitation in boiler size, which means also power plant boilers can also be handled irrespective from their size.
The software is simple to use and a person skilled in the art gets along with it in a single go. A great care has been taken to make its use simple and straightforward and the examples are given (see side menu), which are actually complete instructions for the user.
The software calculates a heat transfer in fossil fuel (oil, gas, biomass, waste derived fuel) fired fire-tube and water-tube steam, hot water and waste heat boilers of arbitrary geometry operated at arbitrary operating conditions with pressure up to 180 bar / 2610 psi and combustion air temperature of up to 400°C/750 F and higher. Version for pressure up to 400 bar / 5800 psi is in final stage of development (supercritical boilers)
The software calculates steam superheater, reheater and economizer and determines the optimum size of these for the given conditions (see sample calculations).
Every boiler consists of one or more segments. Software can accept up to 6 sections such as furnace (with or without rear turnaround chamber); one or two channels; one two or three sets of tubes (as found in 2-pass, 3-pass and 4-pass boilers) and calculates conditions in each segment. The segments can be combined and by that next to every known boiler design can be handled (with exception of a few special cases for which the dedicated proprietary procedures were developed). A list of boiler designs the software can handle is shown here.
Heat transfer medium, a liquid can be following (more can be added as needed):
Rankine cycle liquid.
Input and output values can be either in Metric or English units.
During data entry process screenshots are saved to the disk giving the user a footage of the calculation process (files are deleted when software starts or re-starts; hence if user intents to keep these files he or she shall relocate them prior restarting the software or returning to start screen by pressing Esc twice when in Final menu).
Boiler design is trial & error process, which this software helps to accomplish faster, with less effort and higher accuracy.
Discrepancy sources between measured and calculated values
There are always differences between calculated and actual values. The discrepancies are of an operational (fouling, scaling on gas and water side) and of mathematical nature (heat transfer equations are always derived from experiments). In general, for new and well maintained boilers the discrepancy to actual values is between 1-2% (boiler output, steam capacity).
Impact of fouling
The software assumes clean surfaces in the boiler as appearing during commissioning process. Over time boiler performance becomes affected by fouling, soot and scale deposits. Its magnitude depends on fuel, operating conditions etc..
Boilers which cool down the flue gases below the water dew point are so called condensing boilers. In best case the condensation rate will not exceed 40%. In case of gaseous fuel this would correspond to a maximum 4-5 percentage points efficiency increase (half of that in case of solid and liquid fuels). Since the condensation rate can not be accurately predicted, maximum efficiency increase is known and condensing boilers are of the proprietary designs, those boilers are not covered with this software. When the water vapor dew point in flue gases is reached an alert about the impending condensation is issued, though.