[Program Service | Recent programs]

NEA-0682 H2OTP. (Abstract last modified 18-FEB-1985)


H2OTP, Temperature Dependent and Pressure Dependent Thermodynamics Properties, Transport Properties of H2O

---

Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

---

1. NAME OR DESIGNATION OF PROGRAM - H2OTP. 


2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
H2OTP                NEA-0682/01 Tested

Machines used:
Package-ID     Orig.Computer                       Test Computer
NEA-0682/01    BURROUGHS 7800                      DEC VAX 11/780

3. DESCRIPTION OF PROBLEM OR FUNCTION - H2OTP is a FORTRAN subroutine for the calculation of a full set of light-water thermodynamic and transport properties after the 1967 IFC recommendations for industrial use are calculated.
The following specific parameters can be calculated for steam- or water or saturated-conditions:
     enthalpy, energy, volume, entropy 
     Gibbs function, Helmholtz function 
     relative isobaric volume expansion 
     isobaric and isochoric heat capacity 
     isentropic exponent, sonic velocity 
     relative isothermal compressibility 
     Joule and Joule-Kelvin coefficient 
     heat of evaporation 
     saturation temperature given by pressure 
     saturation pressure given by temperature 
     surface tension 
     dynamic and kinematic viscosity 
     thermal conductivity and Prandtl number 
The independent variables are temperature and pressure, British or S.I. units. 


4. METHOD OF SOLUTION - The data source is the 1967 IFC formulations for Industrial use. The nature of this formulation is of the form of a highly complex mathematical expression for the Gibbs (or Helmholz) function dependent on the temperature and pressure (spc. volume). The thermodynamic quantities are derived from this basic function as simple functions of the derivatives in temperature and pressure up to the second order of differentiation. The transport properties are calculated from the recommended expressions in the 1967 IFC formulation. These expressions are numerical approximations to the experimental results. The set of transport properties calculations presented by the 1967 IFC formulation is not complete, so it has been found necessary to complement with some approximations taken from ref. Risoe-M-669 below, and with some approximations made especially for this code.


5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - The temperature range is 0.01 deg. C to 800 deg. C and the pressure range is 610 N/m**2 to 500.0E5 (1000.0E5) N/m**2.
The use of double-precision words with a mantissa length of 72 bits, corresponding to approximately 22 decimal digits on the Burroughs B-7800 computer of Riso National Laboratory, is essential and has made it possible to use numerical differentiation. Computers of other makes with a similar or higher accuracy can be applied.


6. TYPICAL RUNNING TIME - The calculations are slow and are meant as a reference base. The CPU-time per call of the subroutine H2OTP is approximately 0.025 s on the Burroughs B-7800.

NEA-0682/01:

 NEA-DB executed the test case on VAX-11/780 in 1.1 sec. of CPU time. 


7. UNUSUAL FEATURES OF THE PROGRAM - 


8. RELATED AND AUXILIARY PROGRAMS - 


9. STATUS
NEA-0682/01: 18-FEB-1985 Tested at NEADB


10. REFERENCES  - 
- H. Schmidt, 
  Properties of Water and Steam in SI-Units, 
  VDI, Verein Deutscher Ingenieure, Springer 1969. 
- Thermodynamic and Transport Properties of Steam, 
  ASME, American Society of Mechanical Engineers, 1967. 
- M. Hjelm-Hansen, 
  Polynomial Approximation of Thermodynamic Properties of Light 
  Water, 
  Risoe-M-669, December 1967. 
NEA-0682/01:
- F.W. Cortzen:
  H2OTP, "A Subroutine in FORTRAN for a Full Set of Light-Water
  Thermodynamic and Transport Properties after the 1967  IFC
  Recommendations for Industrial Use"
  Risoe-M-1844 (March 1976)


11. MACHINE REQUIREMENTS - To execute the test case on VAX-11/780, 35,328 bytes of main storage are required.


12. PROGRAMMING LANGUAGE(S) USED -
NEA-0682/01: FORTRAN-77 


13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - The test case included in the package was executed on VAX-11/780 under VMS-V3.4.


14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 


15. NAME AND ESTABLISHMENT OF AUTHOR - 
          F. W. Cortzen 
          Risoe National Laboratory 
          Dept. of Energy Technology 
          DK-4000 Roskilde 
          Denmark 


16. MATERIAL AVAILABLE -
NEA-0682/01:
NEA0682_01.003    H2OTP INFORMATION FILE                             41 records
NEA0682_01.004    H2OTP SOURCE                                     3411 records
NEA0682_01.005    H2OTP TEST CASE OUTPUT                            144 records


17. CATEGORIES  - 

- H.  Heat Transfer and Fluid Flow


Keywords: COMPRESSIBLE FLOW, ENTHALPY, ENTROPY, HEAT FLOW, STEAM, THERMAL CONDUCTIVITY, THERMODYNAMIC PROPERTIES, VISCOSITY, WATER

---

Home - About Us - Work Areas - Data Bank - Publications - Press Room - List of acronyms - Search