ESTS0648 HTRATE.
HTRATE, Power Plant Heat Rate Improvement from Condenser Retubing
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| HTRATE | ESTS0648/01 | Arrived | 06-APR-2001 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| ESTS0648/01 | IBM PC |
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3. DESCRIPTION OF PROGRAM OR FUNCTION
A utility will only retube a
condenser with enhanced tubes if the incremental cost of the enhanced tubes can be offset with reduced fuel costs. The reduced fuel cost is obtained for some units because of the higher heat-transfer coefficient of enhanced tubes. They lead to improved condenser performance measured by a lower condenser pressure and therefore a more efficient power plant. However, the higher heat-transfer coefficients do not always guarantee that enhanced tubes will be more cost effective. Other issues must be considered such as the cooling-water flow reduction due to the increased pressure drop, the low-pressure turbine heat-rate variation with backpressure, and the cooling-water pump and system characteristics. These and other parameters must be considered to calculate the efficiency improvement of the power plant as commonly measured by the quantity known as the heat rate. Knowing the heat-rate improvement, the fuel cost, and the incremental increase of the enhanced tubes from the supplier, the payback time can be determined. This program calculates the heat-rate improvement that can be obtained by retubing a power plant condenser with enhanced tubes of a particular type called Korodense LPD made by Wolverine Tube, Inc. The fuel savings are easily established knowing the heat-rate improvement. All electrical utilities are potential users because a condenser is used as the heat sink for every power plant.
A utility will only retube a
condenser with enhanced tubes if the incremental cost of the enhanced tubes can be offset with reduced fuel costs. The reduced fuel cost is obtained for some units because of the higher heat-transfer coefficient of enhanced tubes. They lead to improved condenser performance measured by a lower condenser pressure and therefore a more efficient power plant. However, the higher heat-transfer coefficients do not always guarantee that enhanced tubes will be more cost effective. Other issues must be considered such as the cooling-water flow reduction due to the increased pressure drop, the low-pressure turbine heat-rate variation with backpressure, and the cooling-water pump and system characteristics. These and other parameters must be considered to calculate the efficiency improvement of the power plant as commonly measured by the quantity known as the heat rate. Knowing the heat-rate improvement, the fuel cost, and the incremental increase of the enhanced tubes from the supplier, the payback time can be determined. This program calculates the heat-rate improvement that can be obtained by retubing a power plant condenser with enhanced tubes of a particular type called Korodense LPD made by Wolverine Tube, Inc. The fuel savings are easily established knowing the heat-rate improvement. All electrical utilities are potential users because a condenser is used as the heat sink for every power plant.
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ESTS0648/01, included references:
- T. Rabas et al.:Heat-Rate Improvements Obtained with the Use of Enhanced Tubes
in Surface Condensers
(1990 EPRI Conference)
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
A file called RESULT is used to store dumped data for each run. This file can be examined if the program crashes to determine the source of the problem. The WRITE (6,100) in the source code, HTRATE.FOR is used to write to this file. A file called VALUES is used for data input if the interactive mode is not selected. A sample input form is attached with the program documentation.
A file called RESULT is used to store dumped data for each run. This file can be examined if the program crashes to determine the source of the problem. The WRITE (6,100) in the source code, HTRATE.FOR is used to write to this file. A file called VALUES is used for data input if the interactive mode is not selected. A sample input form is attached with the program documentation.
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ESTS0648/01
source program mag tapeHTRATE.FOR Source file SRCTPload module mag tapeHTRATE.EXE Executable file LODTP
source program mag tapeINPUT.FOR Interactive input file SRCTP
source program mag tapeIPBUG.FOR Input file subroutine (VALUES) SRCTP
source program mag tapeOPUT.FOR Output file subroutine (RESULTS) SRCTP
test-case output mag tapeRESULT File to store dumped data OUTTP
test-case output mag tapeRESULTS Output file OUTTP
test-case data mag tapeVALUES Data input file DATTP
source program mag tapeSUBS.FOR Contains all the subroutines SRCTP
object program mag tapeHTRATE.OBJ Object program OBJTP
object program mag tapeSUBS.OBJ Object program OBJTP
object program mag tapeIPBUG.OBJ Object program OBJTP
object program mag tapeINPUT.OBJ Object program OBJTP
object program mag tapeOPUT.OBJ Object program OBJTP
report Heat-Rate Improvements... (1990) REPPT
Keywords: condensers, heat transfer, life-cycle cost, operating cost, power plants, tubes.