DESIGN

Smart Run

Smart Run is performed in a form named as "Smart Run", of which form pops up when clicking "Smart Run" button in DESIGN window.

Smart Run provides a easy and convenient method to prepare Design Heat Balance from the built-in industry standard design heat balances prepared by ENGSOFT.   It also provides the function to optimize the final feed water temperature and reheat pressure of the built-in industry standard heat balances as well as user-prepared heat balances.

Major features of Smart Run are as below.

 

1) Design Heat Balance can be easily prepared from the built-in industry design heat balances prepared by ENGSOFT.

The design heat balances provided are as below.   

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850 MW Class Reheat Advanced Ultra-Supercritical

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1000 MW Class Reheat Ultra-Supercritical

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750 MW Class Reheat Supercritical

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500 MW Class Reheat Supercritical

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500 MW Class Reheat Subcritical

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250 MW Class Reheat Subcritical

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100 MW Class Reheat Subcritical

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100 MW Class Non-Reheat Subcritical

 

2) Optimization of final feed water temperature and reheat pressure is also possible for User-prepared design heat balances.

The design heat balance list User is preparing is duplicated in Smart Run form, so that optimization of User-prepared design heat balances is also possible.

 

3) There are 4 options for optimization.

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No Optimization (Design heat balance is prepared as it is, but with the output that User wants.)

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Final Feedwater Temperature optimized (Design heat balance with the least heat rate is selected by searching the maximum final feed water temperature possible with current design.)

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Reheat Pressure optimized (Design heat balance with the least heat rate is selected by searching a range of reheat pressure which is acceptable with current design.)

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Final FW Temperature & Reheat Pressure optimized (Design heat balance with the least heat rate is selected by searching both of the above.)

The heat balances provided by turbine manufacturers are not always designed with the minimum heat rate, i.e. the maximum cycle efficiency.   That's because turbine manufacturers use their standard design and/or their experience design.   Therefore, the turbine cycle efficiencies varies depending on manufacturers.

Achitect engineering engineer should know what is the limit, so that he can lead turbine manufacturers or select the optimum turbine from various turbine manufacturers.

Smart Run provides the function to find out what are the practical conditions to get the best efficient turbine cycle from the industry practice.

Please note that it needs patience to run for optimization because it takes time.

 

4) Optimization search run is done for every 5 oC step for final feed water temperature and every 2 bar step for reheat pressure.

Among the search run results, shown in the "Results : " list are heat rate, cycle efficiency, generator output, (HP) turbine inlet flow, reheat pressure, reheat AEEP level, final feed water temperature.

The design heat balance showing the least heat rate is the final run, and to be added to the Design list when User clicks "Add to List" button.

Search run for optimum final feed water temperature proceeds to higher temperature from the base temperature by 5 oC step, and stop searching if cycle heat rate increases three(3) times consecutively.

In case of reheat pressure, search run proceeds to lower pressure by 2 bar step first and stop searching if cycle heat rate increases three times consecutively, and then starts to search for higher pressure by 2 bar step for consecutive three time increase.

 

Smart Run Form

1) ENGSOFT List and User List combo boxes

To select the base design heat balance for optimization run.   ENGSOFT List shows the list prepared by ENGSOFT, while User List shows the list prepared by User in the DESIGN window.

 

2) Output and Tbn. Flow text boxes

To input the generator output or (HP) turbine inlet flow User wants to run for optimization.

If the base design heat balance has been prepared for "Flow given", the "Tbn. Flow" text box is activated for input, while "Output" text box is activated for input in case the base design heat balance has been prepared for "Power given".

All design heat balances of ENGSOFT List have been prepared for "Power given."

 

3) Title text box

To input the title of Smart Run.

 

4) Run button

To start Smart Run execution.

 

5) Add to List button

To add the optimum run with the least heat rate to the Design list of DESIGN window.

If User closes Smart Run form by clicking "Close" button without "Add to List", the optimum run is lost and not listed.   A warning message pops up if User close the form without "Add to List".

 

6) Text Output button

To show the results of optimum run in text output file.   

Text output uses Note Pad software that is provided with Windows.   Note Pad execution file should be located in the file path of "C:\Windows\notepad.exe".

Text output is saved and overwritten automatically in the file name of "ES_Rankine_SmartRun_e.txt" in the directory where ES_Rankine execution file is located.   Therefore, if User wants to save the text output, please save the text output file as another name by using file save function of Note Pad software.

This text output file can not be filed in Microsoft Office Excel format.

 

7) Smart Run Form Screen

 

8) Sample of Text Output


Copyright (c) 2013 ENGSoft Inc., Seoul, Korea, All right reserved since 2013.  / www.engsoft.co.kr