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NESC9566 TAP-LOOP.

TAP-LOOP, Steady-State and Transient Thermal Analysis of Closed Test Loops

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1. NAME OR DESIGNATION OF PROGRAM:  TAP-LOOP.
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2. COMPUTERS
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Program name Package id Status Status date
TAP-LOOP NESC9566/01 Tested 15-FEB-1990

Machines used:

Package ID Orig. computer Test computer
NESC9566/01 UNIVAC 1107 UNIVAC 1100
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3. DESCRIPTION OF PROGRAM OR FUNCTION

TAP-LOOP is a finite-difference program designed for steady-state and transient thermal analysis of  recirculating fluid loops and associated heat transfer equipment; however, it is not limited to loop analysis. TAP-LOOP was developed  to perform scoping and conceptual design analyses for closed test loops in the Fast Flux Test Facility (FFTF), but it can handle a variety of problems which can be described in terms of potentials, sources, sinks, and storage including, in addition to heat transfer  problems, studies of potential fluid flow, electrical networks, and  stress analysis.
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4. METHOD OF SOLUTION

TAP-LOOP employs a finite-difference approximation in which the problem is broken into mesh points each representing a small volume or node. Temperatures are then calculated depending on whether the analysis is steady-state or transient and whether the node contains fluid transport in addition  to diffusion or diffusion only. Five types of nodes are provided: fluid flow nodes consisting of cathode follower and time-lagged nodes, constant-temperature nodes, zero capacitance and finite capacitance nodes. Heat transfer terms are calculated conventionally via conductances or admittances and potential differences.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
   999 connections
   500 nodes
   100 nodes having latent heat
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6. TYPICAL RUNNING TIME:
NESC9566/01
The test case ran at NEADB on a UNIVAC 1100/91 in 1 second of CPU time.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

TAP-LOOP was derived from the TAP code developed at Atomics International. Stability improvments and transport lag times were incorporated to provide a more useful design tool for thermal analysis of closed hydraulics systems.
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9. STATUS
Package ID Status date Status
NESC9566/01 15-FEB-1990 Tested at NEADB
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10. REFERENCES:
NESC9566/01, included references:
- C.E. Leach and E.L. Kelley, Jr.:
  TAP-LOOP: A Stable Thermal Analyzer Code for Thermal Analysis of
  Closed Hydraulic Systems
  BNWL-1172 (January 1970).
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11. MACHINE REQUIREMENTS:
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC9566/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
NESC9566/01
EXEC8 39R7 (UNIVAC 1100).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

          C.E. Leach and E.L. Kelly, Jr.
          Pacific Northwest Laboratory
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16. MATERIAL AVAILABLE
NESC9566/01
File name File description Records
NESC9566_01.001 Information file 75
NESC9566_01.002 JCL and control information 26
NESC9566_01.003 TAP-LOOP source program 1770
NESC9566_01.004 TAP-LOOP sample problem input 76
NESC9566_01.005 TAP-LOOP sample problem output 1195
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17. CATEGORIES
  • H. Heat Transfer and Fluid Flow

Keywords: coolant loops, finite difference method, heat transfer, steady-state conditions.