Thermoflow Release 7 Update Letter

The enclosed CD, which will install by default in a TFLOW7 directory, bears THERMOFLEX 5.1, GT PRO/GT MASTER/PEACE 10.3, STEAM PRO/STEAM MASTER/RE-MASTER 5.3, and miscellaneous ancillary programs.

This update further expands the engineering capabilities within the THERMOFLEX/PEACE combination and provides several new features in GT PRO/GT MASTER/PEACE. The integration of PEACE into an expanded STEAM PRO/STEAM MASTER is planned for next year. The new features in each program are summarised below.

An all new user’s manual has been completed, documenting the integrated THERMOFLEX/PEACE system in detail. The new manual has an expanded description of all THERMOFLEX components, old and new, illustrated with numerous practical examples of their use, and supported by a library of about one hundred sample files. Appendix B of this manual describes the sample files, which are indexed and cross-referenced to facilitate their use. They are a valuable resource in learning to effectively use THERMOFLEX. Due to our desire to release this version before the end of the year, the extensive THERMOFLEX on-line help system has yet to be updated to reflect the new manual. This will be done and included as an update early next year.

The new THERMOFLEX Version 5.1 features additional PEACE engineered components, with full physical hardware models, as well as expanded PEACE cost estimation functions for a variety of THERMOFLEX components. The PEACE/THERMOFLEX combination now permits detailed engineering modelling of:

e) Mechanical draft cooling towers, including wet towers, dry towers, and wet/dry hybrid towers.

h) Finned tube coils for general heating or cooling applications of air or gases.

These capabilities have been achieved by expanding the original list of fourteen PEACE components, released with the September, 2001 version, as well as expanding the functionality of several existing components. The new components and the features added to existing components are summarised below:

2) Expanded off-design control capability for the PEACE Economiser component. This now includes bypass and/or recirculation controls to achieve off-design target values for water-side or gas-side exit temperatures. The option to control metal temperature to a certain minimum value is also provided.

3) Expanded capability for the PEACE Evaporator component, including modelling forced and assisted circulation designs, as well as more flexibility for off-design controls.

4) Expanded off-design control capability for the PEACE Superheater component, including desuperheating by water spray at its inlet, outlet, or both; to control the exit steam temperature.

6) Addition of PEACE capabilities to the THERMOFLEX Evaporative Cooler component, which has also been expanded to offer a Fogger option. The Fogger can function in Overspray “Wet Compression”, as well as Underspray modes.

7) Expanded the PEACE Coil component, so it can function as a steam/air heater, in addition to its function as a chilled water/air cooler or a hot water/air heater.

8) An all-new PEACE component model for detailed engineering treatment of Fin-Fan Coolers.

9) Revised and significantly expanded reciprocating engine data base, now includes over 300 engine models.

11) New and improved logic for the THERMOFLEX Fractional Header component. A PEACE cost estimation function has also been provided for this component, similar to that for the Logical Header component.

12) A facility has been added to copy the THERMOFLEX graphic outputs as WMF files, for pasting into other applications, such as Word Processors. This is similar to the equivalent functionality in GT PRO.

Licensees of both PEACE and THERMOFLEX will be able to use the new components and functionality at no additional cost. Licensees of either program will have to license the other to use the new components. As we increase synergies between our various modules, we expect that more users will benefit by upgrading to the Engineer’s System (GT PRO/GT MASTER/PEACE/THERMOFLEX). We are offering special terms for this upgrade through February, 2002. Please contact us if you would like a quote, or if you would like a free 30-day trial of any of our modules that you don’t currently have.

1. On-line help: The entire GT PRO/PEACE manual is now available electronically, through an on-line help system, with hyperlinks and help sorted by topic. This is in addition to the original Guidance Window feature, which has been retained in parallel to the new system. This facility will be added in GT MASTER, with the next update.

2. Narrated Tutorials: A new installment of the narrated tutorials, highlighting certain features of GT PRO/PEACE, which we hope will further facilitate your use of the software. These are included on the TFLOW7 CD, in the \Tutorials folder, each as a distinct Power Point Show (*.PPS) file. You can launch them directly with Microsoft Power Point or with the use of the Power Point Viewer that is also included on the CD-ROM. They require your computer to have speakers enabling you to hear the narration, and you must Enable Macros within Power Point. Only the first of these was present with the preceding (TFLOW 6) release, the rest are new with TFLOW 7. Thermoflow would greatly welcome your feedback about the usefulness of these tutorials - an overall positive response will lead to more of them in the future. These are:

a) GT PRO Overview.PPS: Provides a general overview of the breadth and power of GT PRO/PEACE.

b) GT Performance Adjustments.PPS: Illustrates how to tweak the performance of a gas turbine model selected within GT PRO or GT MASTER. Use these methods to match the performance that may have been quoted by the vendor or measured in the field. Unlike the User-defined gas turbine specification, these adjustments tune the model to a given operating point, providing improved predictions for performance across the range of operating conditions of interest. The User-defined gas turbine specification is described for use when changes must be imposed upon data defined gas turbine models.

c) GT Evaporative Inlet Air Cooling & Fogging.PPS: Shows the mechanics of including evaporative cooling or fogging of the gas turbine's inlet air for improving plant performance, and demonstrates the effects of these inlet treatments upon plant performance and cost. Using GT PRO/PEACE, the incremental cost of the plant is clearly shown to exceed the cost of the inlet air treatment equipment alone, since designing the plant with inlet cooling in place requires the HRSG, steam turbine, and other related equipment, to be made larger to accommodate the increased power and exhaust flow available from the gas turbine.

d) GT PRO Multiple Runs.PPS: Outlines the mechanisms of using the Multiple Runs (Macro) feature of GT PRO/PEACE. Simply entering particular conditions for several calculations, this feature provides results in tabular form, accommodates graphic displays, and can export the results to Excel. This tutorial suggests how the Macro can be used to seek an optimal design-point condenser pressure in a combined cycle with an air-cooled condenser.

e) GT Inlet Air Chilling.PPS: Shows the mechanisms of including electrically driven mechanical chillers or steam driven absorption chillers to cool the GT PRO model's gas turbine inlet air. Comparisons with an unchilled base case show the significant improvements that inlet chilling can bring to a combined cycle plant design.

f) GT Fuel Heating.PPS: Demonstrates the use of the fuel heating option, and also the recovery of heat from gas turbine cooling air, for GT PRO's gas turbine models. Fuel heating alone is shown in two cases, one taking heat from the gas turbine's cooling air stream and the other taking heat from the HRSG's IP economiser stream. Use of heat from the GT cooling air to both heat the fuel and produce additional IP steam is also illustrated to be beneficial.

3. Emissions: A new facility allows users to define gas turbine and duct burner non-stoichiometric emissions, such as CO, NOx, UHC (unburnt hydrocarbons), and ammonia slip, if SCR is used. These may be defined in ppm (parts per million), either on a dry or wet basis, and at a reference oxygen content. The definitions may be entered separately for each fuel type, gaseous or liquid. The program will then show in its output the production of these pollutants per hour, per year, and per MWh of electricity produced. In addition, the stoichiometric emissions, CO2 and SO2, will be computed by the program and shown in the outputs.

4. Water Balance: A new water balance summary table appears in the output, summarising all absolute inflows and outflows of water or steam. A second table summarises selected inflows and outflows which may be of special interest due to their environmental or monetary costs. Those are selectable by the user in a new input screen, as percentages of the absolute flow rates of the various inflowing or outflowing streams.

5. Stack Water Heater: This heat exchanger in GT PRO may now be used to heat an external loop of steam, as well as water.

6. HRSG: The flexibility to pre-define tube length as an input, rather than boiler duct aspect ratio, has been added.

7. Economics: A facility has been added to allow import of entire sets of input data within the Economics topic, from another GT PRO file. This saves editing time.

A few minor bugs have been fixed. The next significant update will involve their integration with PEACE, next year.

ID	Engine Name
226	MHI 501F