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NESC0798 MSF21,VTE21.

MSF21/VTE21, Desalination Plant Heat, Mass Balance, Design, Cost Optimization

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1. NAME OR DESIGNATION OF PROGRAM:  MSF21,VTE21
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
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.
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4. METHOD OF SOLUTION

The general method is to solve for a heat and mass balance in each part of the plant.
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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.
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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.
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7. UNUSUAL FEATURES OF THE PROGRAM

The programs include default or built-in values for all design parameters. Only those values which are to be changed must be entered as problem input data.
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
NESC0798/02 03-AUG-1999 Tested at NEADB
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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.
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11. MACHINE REQUIREMENTS

MSF21,VTE21 requires 272K bytes of storage for execution. Standard system card-image input and printer output units are needed.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC0798/02 FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  OS/360,370.
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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.
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15. NAME AND ESTABLISHMENT OF AUTHOR

   Contact       J. V. Wilson
                 Engineering Technology Division
                 Oak Ridge National Laboratory
                 P. O. Box Y
                 Oak Ridge, Tennessee  37830
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16. MATERIAL AVAILABLE
NESC0798/02
source program   mag tape                                           SRCTP
test-case data   mag tape                                           DATTP
test-case output mag tape                                           OUTTP
report                                                              REPPT
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17. CATEGORIES
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: cost, desalination, design, economics, evaporators, flash heating, optimization, performance, seawater, tubes.