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E X A M P L E S
Examples:
The examples
below show standard equipment. It should be emphasized, that AHTL can
rigorously model nonstandard equipment, too. Moreover, it is its
main area of application. Taking standard equipment
as an example however has the advantage that the results can be easily
verified. The time required to do these simulations is compatible with
engineering purposes.
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A refinery heater (reboiler)
example, with API-560 data sheets and complete AHTL output can be found
here, together with additional
data that allows full check-calculations by others. |
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AHTL has been used to model an
Alstom
Transfer Line Exchanger, including the thermosyphon system of an
ethylene cracking furnace. Excellent agreement with vendor data was
achieved. AHTL can also model air preheat systems, ducting and piping
including heat losses. In fact, AHTL could model a complete cracking
furnace, except the radiant section. |
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A plate heat exchanger example, with
full explanation of geometry, operating conditions, transient response
and steady-state solution can be found here. |
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An example of a spiral plate heat
exchanger, with full explanation of geometry, operating conditions and
steady-state solution can be found here. |
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Simulations have been done in
cooperation with the
Johannes Kepler university in Linz (Austria), related to thermoplastic
material property research. This resulted in a publication in
International Polymer Processing (Volume XXI, issue 1, March 2006).
Examples can be found here. |
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Possible further
applications:
AHTL can also be applied
to thermo-hydraulic calculation of piping, ducting, burners, preheat
systems and many more unit operations. Since all conservation laws are
fully implemented, AHTL gives exact solutions in cases where otherwise
one would resort to hand calculations and spreadsheets (because
existing software cannot handle the situation).
Because AHTL does
heat transfer calculations in a generic way, it can be successully
applied also in unexpected
situations.
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