Welcome to our Website! Here the interested expect and other public have an access to what far was thus an exclusive domain of few committed specialists. The dedicated software tool for thermodynamic calculations of fossil fuel fired boilers has been developed. It is based on the new theoretical findings on heat transfer in boilers and delivers a proven +/-2% uncertainty. It can be applied to carry out tasks like these:
HEAT TRANSFER ANALYSIS
HEAT TRANSFER ANALYSIS IN CASE OF FIRING TWO FUELS AS FOUND IN COAL POWER PLANTS COFIRING BIOMASS OR WASTE DERIVED FUEL (RDF).
There is no limitation in boiler size, which is especially convenient in case of water tube boilers (also called utility or power boilers). Equations for radiant heat transfer from CO2 and H2O vapor in flue gases are not numerical but physical ones, which assures the highest possible accuracy unlike in case of numerical equations where there are cases with up to 300%(!) discrepancy (see Underlying theory tag for more explanation).
The software is very simple to use and a person skilled in the art can get along with it in a single go. A great care has been taken to make it simple and straightforward and the examples given (see side menu) are in essence 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 100bar/1450psi (higher pressure can be added).
A boiler can consist of multiple segments such as furnace, channels and tubes, with or without front or/and rear cooled door. The boiler segments can be combined, which makes calculation of next to every known boiler design possible (with exception of few special cases for which dedicated proprietary procedures were developed). A list of boiler designs the software can handle is shown here.
Boiler 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.
Boiler design is trial & error process, which is still there. However, the software helps to accomplish that task sooner, easier and with 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, soot and scale deposits
The impact of fouling and soot deposits on gas side as well scale deposits on the water side have deliberately NOT been included. The reason is that this is always coupled with an increased calculation uncertainty. Every boiler starts its life with the commissioning process where it has to deliver the claimed performance. Over time boiler performance becomes affected by fouling, soot and scale deposits. The magnitude depends on fuel, operating conditions etc., which can not be predicted and taken in account accurately enough. Hence, what a boiler displays during commissioning process counts, which is what this software delivers.
Boilers which cool down the flue gases below the water dew point are called condensing boilers. In best case the condensation rate will reach 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 dew point in flue gases is reached the software issues an alert about the impending condensation, though.
BOILER DESIGN SOFTWARE FOR FIRE-TUBE & WATER-TUBE BOILERS