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
  • DESIGN OPTIMIZATION
  • 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):
  • water
  • Rankine cycle liquid
  • thermal oil.

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.

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 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
INTRODUCTION
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