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Knowledge Base Articles»KB000029 - Using Live Coal Ana…
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Last modified on 12/5/2018 3:38 PM by User.

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KB000029 - Using Live Coal Analysis in EtaPRO

Problem

All EtaPRO Users currently using “static” coal analysis (entered via the Fuel form in EtaPRO Configuration Tools) can convert their analysis to a “live” updated analysis with inputs fed from a historian. Required data can be manually entered from a data logger, through the EtaPRO Data Log, or using data from the mill/pulverizer operation.

Solution

  1. Examine Current Coal Analysis Method

EtaPRO systems at most coal-burning Rankine Cycle plants use the Configuration Tools - Fuel form to enter coal analysis. This form can be viewed by clicking the Configuration Tools button, followed by the Fuel button.

2. Identify Current Coal Flow Acquired Points

Coal flow acquired points serve as arguments in intermediate data points used to calculate heat input from coal (which also reference the Fuel Information for heating value Btu/lb).

These intermediate points feed a single total heat input data point used for heat rate calculations.

Updating the “static” fuel analysis is a straightforward process. By replacing the total heat input arguments with data points derived from a “live” fuel analysis can make your EtaPRO calculations more accurate and current.

3. Add Coal Analysis Constituent EtaPRO Data Points

Use the EtaPRO Data Point Wizard to create data points (EtaPRO 10 User Guide Chapter 14). A separate data point is created for Ash, Sulfur, Hydrogen, Carbon, Moisture, Nitrogen, and Oxygen content.

4. Add EtaPRO Data Points for HHV, Cost, Dewpoint, and ACET

Use the EtaPRO Data Point Wizard to create data points (see EtaPRO 10 User Guide Chapter 14).  Separate data points are created for HHV, Cost, Dewpoint, and Minimum ACET.

5. Use Calculation Template 3146 for Coal Feeder Data Points

Use the EtaPRO Data Point Wizard to create data points (see EtaPRO 10 User Guide Chapter 14) to serve as non volatile fuel data replacements for each feeder. Each of these points uses template 3146.

Arguments 1-11 correspond to the Coal Analysis Constituents, HHV, Cost, Dew Point, and ACET.

6. Replace Current Coal Heat Input Data Points in Heat Rate Calculations

Identify heat rate calculations using old “static” data points and replace with “live” data points.

7. Create Corresponding Historian Items/Tags

Consult your historian user guide for instructions on creating archive items or tags. For EtaPRO systems using PI, tags can be created using the EtaPRO Configuration Tools. Items/tags should be created for each EtaPRO data point created in Steps 2 and 3.

8. Additional Assistance

EtaPRO users requiring additional assistance with this procedure, or with questions about switching fuels or implementing mill/pulverizer data should contact EtaPRO Support or EtaPRO Business Development:

EtaPRO Support - 1.716.799.1077 etaprosupport@gpworldwide.com