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 and
delivers a
proven max. +/-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
  • BOILER DESIGN OPTIMIZATION
  • BOILER COFIRING TWO FUELS AS FOUND IN COAL POWER PLANTS WHERE
    BIOMASS OR WASTE DERIVED FUEL (RDF) IS ADDED TO COAL.

There is
no limitation in boiler size, which means the 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 it
simple and straightforward and the examples
given (see side menu) are
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 1800bar/2610psi
(higher pressure can be added as found in so called supercritical boilers) and
combustion air temperature of up to 400°C/750F (higher temperature can be added on
demand as well).

A boiler can consist of multiple
segments, which can be combined. This way a
calculation of next to
every known boiler design is possible (with exception of few
special cases for which the 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):
  • water
  • 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 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 into account accurately
enough. Hence, what a boiler displays during commissioning process counts, which is
what this software delivers.

Condensing boilers

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
vapor dew point in flue gases is reached an alert about the impending condensation
issued, though.
BOILER DESIGN SOFTWARE
FOR FIRE-TUBE & WATER-TUBE BOILERS
INTRODUCTION
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