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Thermoflow Inc.

WHAT IS STEAM PRO?

STEAM PRO is a highly automated system design tool – a heat balance
program specifically intended for design of steam power cycles.
 Use STEAM PRO to build models for conventional steam cycles, including their
boilers, and also for steam cycles of nuclear power plants.
 In combination with PEACE (Plant Engineering and Cost Estimator), STEAM PRO
provides engineering details and cost estimation.
 STEAM PRO performs design-point calculations only – use STEAM MASTER for
simulations of part loads or other off-design conditions.


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ST PRO PRO
STEAM

What is PEACE?
PEACE is Thermoflow’s Plant Engineering And Cost Estimator, an
additional tool that works in conjunction with Thermoflow’s heat balance
design and simulation programs.

What does PEACE add to STEAM PRO?
 PEACE brings regional costs, engineering details, and concerns beyond
the heat balance performance into a comprehensive description of the plant.

 PEACE provides graphic and tabular information about size, weight,
and cost of plant equipment.
 PEACE produces a detailed total plant cost estimate.
 PEACE provides a simple pro forma financial projection to estimate
cash flows, return on investment, and break-even power cost.
 PEACE can be used to impose more detailed hardware effects upon
heat balance simulations, particularly piping and pump hardware details.


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ST PRO PRO
STEAM

Inputs – General Arrangement

The Navigator column displays the major input
topics. Topics in STEAM PRO are arranged
vertically, and follow a hierarchy, progressing
from top to bottom. Selections made in an
upper (earlier) topic will condition the selections
available in lower (later) topics.
Tabs are used as necessary to subdivide
topics; green tabs include PEACE inputs
Every entry box has been initialized with a
reasonable value. You never have to fill an
empty box. Instead you edit just those that
are of concern to you, trusting the others to
have been logically selected.


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ST PRO PRO
STEAM

The program opens to the New Session topic
Select to begin a new design or to revise an existing one.

Select the steam supply type for the plant you will design.

Select a representative range of output. You will specify
the actual output later, but the Setup Wizard uses this
range to initialize the design’s:
>main steam conditions (P&T),
>configuration and reheat (or not),
>number of feedwater heaters, and much more.
Click on Start Design to continue.


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ST PRO PRO
STEAM

At the Plant Criteria topic...

Of the several Tabs within this topic, the Site and Cooling
tab is of greatest importance to the thermal design.

The program’s default fuel is characterized in the Fuel
Selection panel. Click on the Fuel Library & Userdefined Fuel button to select a different fuel ...


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ST PRO PRO
STEAM

Within the fuel selection utility ...
Click on any of the several fuels listed within the Fuel
Library to replace the default fuel, or select User-defined to
specify the properties of the fuel anticipated at your site.

Click on OK to return to the Plant Criteria topic.


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ST PRO PRO
STEAM

Also at Plant Criteria ...

Select the cooling system type of your choice.
The figure illustrates and confirms your selection.


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ST PRO PRO
STEAM

Visiting the Regional Costs tab...

Click on any of the domestic (US) or international locations
to view and then initialize values for Cost Multipliers, which
condition the STEAM PRO / PEACE cost estimation relative
to the reference, generic US cost estimate.


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ST PRO PRO
STEAM

Within the Cooling System topic ...

Click on the Design Method selector if you wish to exert more
control upon the cooling system’s design parameters. By
default, parameters will be set automatically, in accord with the
ambient conditions and your Cost/Efficiency setting.


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ST PRO PRO
STEAM

Within the ST Inputs topic ...

Select (or accept) the
steam turbine type.

You can:
Specify design target – Gross power, Net power, or Steam flow.
Edit main steam P & T, and crossover pressure, as desired.


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ST PRO PRO
STEAM

Moving on to feed water heaters ...
Using reasonable defaults and conditioned by inputs made
before reaching this display, the entire feedwater heater
system has been initialized, extracting steam from the
turbine at conditions suitable for the expected overall water
temperature rise.

The user, of course, can edit these settings, as well as
reselecting the steam sources for the heaters.


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ST PRO PRO
STEAM

Looking at the Boiler Thermal topic...

There are also several layers of inputs for the boiler. In
Automatic design mode, only the Main tab is accessible.


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ST PRO PRO
STEAM

STEAM PRO Outputs

Three categories of outputs – Text, Graphics, and
PEACE, are provided, each with multiple tabs
to help you quickly find the results you need.

The two last buttons let you:
Produce a series of related designs begun with the current file
Begin simulation of the present design, under different
conditions, using STEAM MASTER.


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ST PRO PRO
STEAM

STEAM PRO Text Output

Select from the Tabs above to
view the category of text output
of interest.


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ST PRO PRO
STEAM

STEAM PRO Graphics Output

This overview displays gross and net electrical output, heat
rate, and fuel energy input. Note also the many other
graphic displays to be selected from the tabs above.


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ST PRO PRO
STEAM

Graphics – Steam Turbine Display

This figure illustrates all the significant flows to and from
the steam turbine, including extractions for the feedwater
heaters. Units are identified in the lower right corner.


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ST PRO PRO
STEAM

Graphics – Turbine Expansion Line

The useful Mollier diagram illustrates the steam conditions
through the turbine and the effect of the exhaust loss.
Clicking anywhere on the diagram causes the data to be
displayed in tabular form.


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ST PRO PRO
STEAM

Graphics – Psychrometric Chart

Shown here for a combination wet-dry cooling tower, this
diagram shows the conditions of the humid air passing
through and mixing after the wet and dry segments of
cooling tower.


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ST PRO PRO
STEAM

PEACE Outputs

PEACE provides Schematics
like this Site Plan,
Equipment Data tables, a
Cost Report detailing the
capital investment, and a
pro forma Cash Flow
analysis,
in addition to the STEAM
PRO heat balance outputs.


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ST PRO PRO
STEAM

PEACE Schematics

Select from the list to see dimensioned layouts of
the site and of plant equipment.


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ST PRO PRO
STEAM

PEACE Equipment Data

For each of the equipment categories, selectable by the
tabs visible here, these tables indicate size, weight, and
nameplate specifications.


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ST PRO PRO
STEAM

PEACE Cost Report

Project Summary is shown, but click on any tab to see the
individual breakdown of costs. Note the two columns:
Reference Cost and Estimated Cost.
Click on Cash Flow to see a pro forma financial projection.


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ST PRO PRO
STEAM

PEACE Cash Flow

This Financial Summary table displays the overall results of
the pro forma Cash Flow projection detailed in the subsequent tab.
In very little time, you can use these results to explore the influence
of design decisions on plant economic performance.