NESC0798 MSF21,VTE21.
MSF21/VTE21, Desalination Plant Heat, Mass Balance, Design, Cost Optimization
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM 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 AUTHOR, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| MSF21/VTE21 | NESC0798/02 | Tested | 03-AUG-1999 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NESC0798/02 | IBM 3033 | IBM 3033 |
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3. DESCRIPTION OF PROBLEM OR FUNCTION
MSF21 and VTE21 perform design and costing calculations for multistage flash evaporator (MSF) and multieffect vertical tube evaporator (VTE) desalination plants. An optimization capability is available, if desired.
The MSF plant consists of a recovery section, reject section, brine heater, and associated buildings and equipment. Operating costs and direct and indirect capital costs for plant, buildings, site, and intakes are calculated. Computations are based on the first and last stages of each section and a typical middle recovery stage. As a result, the program runs rapidly but does not give stage by stage parameters.
The VTE plant consists of vertical tube effects, multistage flash preheater, condenser, and brfine heater and associated buildings and equipment. Design computations are done for each vertical tube effect, but preheater computations are based on the first and last stages and a typical middle stage.
MSF21 and VTE21 perform design and costing calculations for multistage flash evaporator (MSF) and multieffect vertical tube evaporator (VTE) desalination plants. An optimization capability is available, if desired.
The MSF plant consists of a recovery section, reject section, brine heater, and associated buildings and equipment. Operating costs and direct and indirect capital costs for plant, buildings, site, and intakes are calculated. Computations are based on the first and last stages of each section and a typical middle recovery stage. As a result, the program runs rapidly but does not give stage by stage parameters.
The VTE plant consists of vertical tube effects, multistage flash preheater, condenser, and brfine heater and associated buildings and equipment. Design computations are done for each vertical tube effect, but preheater computations are based on the first and last stages and a typical middle stage.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
In the MSF program the loss of tray brine temperature is the same for each stage in the heat recovery section and in the heat reject section. The temperature and the flow rate of the heat reject stream are always greater than zero, and there is no option to consider a once- through type plant.
The VTE plant design is limited to 30 effects.
In the MSF program the loss of tray brine temperature is the same for each stage in the heat recovery section and in the heat reject section. The temperature and the flow rate of the heat reject stream are always greater than zero, and there is no option to consider a once- through type plant.
The VTE plant design is limited to 30 effects.
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6. TYPICAL RUNNING TIME
A single MSF computation typically requires 1.5 seconds on the IBM360/65. An optimization requiring 300 iterations is accomplished in about 75 seconds. On the IBM360/91 an optimized case typically runs about 3 seconds. The four trial cases including MSF21 and VTE21 runs, with and without optimization, for a 2.5 Mgd plant using program-defined default parameters, required a total of 6.5 seconds on the IBM370/195.
A single MSF computation typically requires 1.5 seconds on the IBM360/65. An optimization requiring 300 iterations is accomplished in about 75 seconds. On the IBM360/91 an optimized case typically runs about 3 seconds. The four trial cases including MSF21 and VTE21 runs, with and without optimization, for a 2.5 Mgd plant using program-defined default parameters, required a total of 6.5 seconds on the IBM370/195.
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10. REFERENCES
W. G. S. Fort, Computer Codes for Office of Saline
Water Program Analysis Part V: MSF-21: A Fortran Code for the
Rapid Calculation or Optimization of Multistage Flash (MSF)
Desalination Plants, ORNL-TM-3535 Part V, February 1972.
W. G. S. Fort and J. V. Wilson, Computer Codes for
Office of Saline Water Program Analysis Part VI. VTE-21: A
FORTRAN Code for the Rapid Calculation or Optimization of Vertical
Tube Evaporator (VTE) Desalination Plants, ORNL/TM-3535 Part VI,
September 1976.
P. Glueckstern, J. V. Wilson, and S. A. Reed,
Modifications of ORNL's Computer Programs MSF-21 and VTE-21 for
the Evaluation and Rapid Optimization of Multistage Flash and
Vertical Tube Evaporators, ORNL/TM-5230 and Errata, June 1976.
W. G. S. Fort, S. H. Moore, and J. V. Wilson,
Computer Codes for Office of Saline Water Program Analysis Part
III, Programs and Subprograms Common to Several Desalination
Processes, Including Code PROC21, ORNL-TM-3535 Part III, January
1973.
NESC Note 79-17, NESC No. 798.360, Description of
MSF21,VTE21 Input Data, October 11, 1978.
U. S. Department of Interior Office of Saline Water
and the Bureau of Reclamation, Desalting Handbook for Planners,
First Edition, May 1972.
W. G. S. Fort, Computer Codes for Office of Saline
Water Program Analysis Part V: MSF-21: A Fortran Code for the
Rapid Calculation or Optimization of Multistage Flash (MSF)
Desalination Plants, ORNL-TM-3535 Part V, February 1972.
W. G. S. Fort and J. V. Wilson, Computer Codes for
Office of Saline Water Program Analysis Part VI. VTE-21: A
FORTRAN Code for the Rapid Calculation or Optimization of Vertical
Tube Evaporator (VTE) Desalination Plants, ORNL/TM-3535 Part VI,
September 1976.
P. Glueckstern, J. V. Wilson, and S. A. Reed,
Modifications of ORNL's Computer Programs MSF-21 and VTE-21 for
the Evaluation and Rapid Optimization of Multistage Flash and
Vertical Tube Evaporators, ORNL/TM-5230 and Errata, June 1976.
W. G. S. Fort, S. H. Moore, and J. V. Wilson,
Computer Codes for Office of Saline Water Program Analysis Part
III, Programs and Subprograms Common to Several Desalination
Processes, Including Code PROC21, ORNL-TM-3535 Part III, January
1973.
NESC Note 79-17, NESC No. 798.360, Description of
MSF21,VTE21 Input Data, October 11, 1978.
U. S. Department of Interior Office of Saline Water
and the Bureau of Reclamation, Desalting Handbook for Planners,
First Edition, May 1972.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
Programs MSF21 and VTE21 are packaged together because they have many subprograms in common. The type of plant to be calculated is specified in the input data.
Subroutines MAINM, PLANTM, SIZEM, COSTM, and RITEM are specific to program MSF21. Subroutines MAINV, PLANTV, SIZEV, COSTV, RITEV, and UVE are specific to program VTE21. If only one type of plant is to be calculated, the amount of storage required by the program can be reduced by omitting unnecessary subroutines. When subroutines MAINM or MAINV are omitted, dummy subroutines should be substituted or the statements calling the missing subroutine deleted.
Dummy IDAY and ICLOCK routines are provided. These date and time routines return the current date and elapsed CPU time in the local computing environment, and may be replaced with suitable alternative environment routines.
Programs MSF21 and VTE21 are packaged together because they have many subprograms in common. The type of plant to be calculated is specified in the input data.
Subroutines MAINM, PLANTM, SIZEM, COSTM, and RITEM are specific to program MSF21. Subroutines MAINV, PLANTV, SIZEV, COSTV, RITEV, and UVE are specific to program VTE21. If only one type of plant is to be calculated, the amount of storage required by the program can be reduced by omitting unnecessary subroutines. When subroutines MAINM or MAINV are omitted, dummy subroutines should be substituted or the statements calling the missing subroutine deleted.
Dummy IDAY and ICLOCK routines are provided. These date and time routines return the current date and elapsed CPU time in the local computing environment, and may be replaced with suitable alternative environment routines.
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NESC0798/02
source program mag tape SRCTPtest-case data mag tape DATTP
test-case output mag tape OUTTP
report REPPT
Keywords: cost, desalination, design, economics, evaporators, flash heating, optimization, performance, seawater, tubes.