Steam95 and Steam97 Excel Add-In Package

Steam95 Excel Add-In based on IAPWS-95 and Steam97 Excel Add-In based on IAPWS-IF97 (32 bit & 64 bit)

For Excel 2003 / 2007 / 2010 (32 bit & 64 bit) / 2013 (32 bit & 64 bit) / 2016 (32 bit & 64 bit)

Steam95 and Steam97 Excel Add-In Package




About Steam95 and Steam97 Excel Add-In Package

The Steam9597 package contains two Excel Add-In libraries for calculation of properties of water and steam:

  • Steam95 Excel Add-In based on the scientific formulation (IAPWS-95)
  • Steam97 Excel Add-In based on the industrial formulation (IAPWS-IF97)

The libraries are fully integrated in Excel, and available functions can be used in the same way as any other Excel function.


Main features of the library:
  • Professional quality, industrial strength software
  • Based on the international standard formulation
  • Accurate and thoroughly tested
  • Developed in C++ for maximum speed
  • Create User Defined Functions (UDF) which use Steam95 and/or Steam97 functions
  • Call Steam95 and Steam97 functions from VBA (samples are included in the release version)
  • Easy to install and easy to use
  • For installation and use of the library no administrator rights required
  • After installation no computer restart required
  • One year free technical support



Steam95 Excel Add-In

The Steam95 Excel Add-In library calculates 30 thermodynamic and transport properties of water and steam.

It allows 11 different combinations of input variables to be used for calculations.

Input variables that can be used are:

  • Pressure
  • Temperature
  • Enthalpy
  • Entropy
  • Volume
  • Internal energy
  • Steam quality

The library also provides 7 helper functions for calculation of properties on fluid phase boundaries and retrieval of important constants of water and steam.


Used Formulations (Steam95)

The library uses new scientific formulation for steam tables, called "The IAPWS Formulation 1995 for the Thermodynamic Properties of Ordinary Water Substance for General and Scientific Use", and replaces the previous scientific formulation, IAPS-84.

IAPWS-95 significantly improves accuracy of the calculation of the thermodynamic properties compared with the old formulation.

For transport properties calculations are based on the latest internationally accepted equations also available from IAPWS.




Steam97 Excel Add-In

The Steam97 Excel Add-In library calculates 30 thermodynamic and transport properties of water and steam.

It allows 16 different combinations of input variables to be used for calculations.

Input variables that can be used are:

  • Pressure
  • Temperature
  • Enthalpy
  • Entropy
  • Volume
  • Internal energy
  • Steam quality

The following figure shows a sample spreadsheet included in the download package.


Steam 97 Excel Add-In - Sample calculations in Excel

Steam 97 Excel Add-In - Sample calculations in Excel


Used Formulations

The library uses new industrial formulation for steam tables, called "IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam (IAPWS-IF97)", and replaces the previous industrial formulation for steam tables, IFC-67.

IAPWS-IF97 improves significantly both accuracy and speed of the calculation of the thermodynamic properties compared with the old formulation.

For transport properties calculations are based on the latest internationally accepted equations also available from IAPWS.


NOTE:
The Steam95 and Steam97 Excel Add-In libraries cannot be shipped to a third party as a part of your VBA application. If you need a royalty free library please refer to the Steam97 ActiveX DLL.

System Requirements

Operating system Windows XP / Vista / Windows 7 / Windows 8 / Windows 8.1 / Windows 10.

Excel 2003 / 2007 / 2010 (32 bit & 64 bit) / 2013 (32 bit & 64 bit) / 2016 (32 bit & 64 bit).


User privileges
Installation and use of the library requires standard user privileges or better.

Steam Properties

The following thermodynamic and transport properties can be calculated with Steam95 and Steam97 Excel Add-In libraries:


Calculable properties in SI or E units - Steam9597 Excel Add-In v3.1
 Property NameSteam95Steam97
  1 Pressure yes yes
  2 Temperature yes yes
  3 Density yes yes
  4 Specific volume yes yes
  5 Specific enthalpy yes yes
  6 Specific entropy yes yes
  7 Specific internal energy yes yes
  8 Specific isobaric heat capacity yes yes
  9 Specific isochoric heat capacity yes yes
 10 Speed of sound yes yes
 11 Isentropic exponent yes yes
 12 Specific Helmholtz free energy yes yes
 13 Specific Gibbs free energy yes yes
 14 Compressibility factor yes yes
 15 Steam quality yes yes
 16 Region  - yes
 17 Isobaric volume expansion coefficient yes yes
 18 Isothermal compressibility yes yes
 19 Partial derivative (dV/dT)p yes yes
 20 Partial derivative (dV/dP)T yes yes
 21 Partial derivative (dP/dT)v yes yes
 22 Partial derivative (dP/dV)T yes yes
 23 Isothermal Joule-Thomson coefficient yes yes
 24 Joule-Thomson coefficient yes yes
 25 Dynamic viscosity yes yes
 26 Kinematic viscosity yes yes
 27 Thermal conductivity yes yes
 28 Thermal diffusivity yes yes
 29 Prandtl number yes yes
 30 Surface tension yes yes
 31 Static dielectric constant yes  -


Range of Validity

Steam95 Excel Add-In

The entire set of equations of IAPWS-95, used by the application for calculation of thermodynamic properties, is defined by the following temperature and pressure range:

  • melting-pressure / sublimation-pressure curve <= T <= 5000 K
  • p <= 100000 MPa

Steam97 Excel Add-In

The entire set of equations of the IAPWS-IF97, used by the library for calculation of thermodynamic properties, is defined by the following temperature and pressure range:

  • 273.15 K <= T < = 1073.15 K    p < = 100 MPa
  • 1073.15 K < T < = 2273.15 K    p < = 50 MPa

Steam97 Range of Validity

Fig.1 Steam table regions defined in the IAPWS-IF97


Screenshots

The following screenshots demonstrate how to use the library, it's a 4 step process.

1.(a) Start Excel and press the "Insert Function" toolbar button.

Insert Function toolbar button

1.(b) Alternatively, start Excel and press the "Insert Function" menu item.

Insert Function menu item

2. Select a Steam95 library (SI or English units).

Select Steam95 library

3. Select a function and press the OK button.

Insert Function - Steam95 library

4. Enter input parameters and press the OK button.

Calculate Steam95 library

NOTE: You don't have to put quotes around the property ID, they are inserted automatically.

That's it, the result will be displayed in the selected cell.


Steam95 and Steam97 VBA Programming

The release version of the Steam9597 Excel Add-In library contains "modCallFunction" module which provides VBA wrapper utility functions.

The utility function CallFunction makes it easy to call Steam95.xll and Steam97.xll functions from VBA. For more information please refer to the help file provided in both demo and release versions.



Example 1

This excerpt from the code demonstrates how to calculate heat of evaporation for given saturation temperature.


  1. 'Calculate saturation pressure for given temperature
  2. ps = CallFunction("SatTXsi", t, xLiquid, "p")
  3. Worksheets("Heat of Evaporation").Cells(row, 2).Value = ps
  4. 'Calculate specific enthalpy of the liquid on the saturation line
  5. hLiquid = CallFunction("SatTXsi", t, xLiquid, "h")
  6. Worksheets("Heat of Evaporation").Cells(row, 3).Value = hLiquid
  7. 'Calculate specific enthalpy of the vapor on the saturation line
  8. hVapor = CallFunction("SatTXsi", t, xVapor, "h")
  9. Worksheets("Heat of Evaporation").Cells(row, 4).Value = hVapor
  10. 'Calculate heat of evaporation
  11. delta_h = hVapor - hLiquid
  12. Worksheets("Heat of Evaporation").Cells(row, 5).Value = delta_h



Example 2

This excerpt from the code demonstrates how to calculate steam turbine efficiency.


  1. 'Calculate specific enthalpy
  2. hIn = CallFunction("SteamPTsi", pIn, tIn, "h")
  3. Worksheets("Steam Turbine").Cells(row, 3).Value = hIn
  4. 'Calculate specific entropy
  5. sIn = CallFunction("SteamPTsi", pIn, tIn, "s")
  6. Worksheets("Steam Turbine").Cells(row, 4).Value = sIn
  7. Worksheets("Steam Turbine").Cells(row, 5).Value = pOut
  8. Worksheets("Steam Turbine").Cells(row, 6).Value = tOut
  9. 'Calculate specific enthalpy
  10. hOut = CallFunction("SteamPTsi", pOut, tOut, "h")
  11. Worksheets("Steam Turbine").Cells(row, 7).Value = hOut
  12. 'Calculate specific enthalpy
  13. hs = CallFunction("SteamPSsi", pOut, sIn, "h")
  14. Worksheets("Steam Turbine").Cells(row, 8).Value = hs
  15. 'Calculate steam turbine efficiency
  16. eta = (hIn - hOut) / (hIn - hs) * 100
  17. Worksheets("Steam Turbine").Cells(row, 9).Value = eta

Downloads

The setup program will automatically install the library in Excel.

To install the library successfully you must have at least standard user privileges on your computer.


Steam95 and Steam 97 Excel Add-In library

For Excel 2003 / 2007 / 2010 (32 bit) / 2013 (32 bit) / 2016 (32 bit)

- Download Steam9597 Excel Add-In Package version (3.1) - demo (32 bit)



Steam 97 Excel Add-In library

For Excel 2010 (64 bit) / 2013 (64 bit) / 2016 (64 bit)

- Download Steam9597 Excel Add-In Package version (3.1) - demo (64 bit)



You can also evaluate the Steam Tables library (based on IAPWS-95 and IAPWS-IF97) online, visit Steam Tables Calculator web application. It uses the same calculation engines as the Steam95 and Steam97 Excel Add-Ins.



Quick reference documents

- List of available properties in the Steam95 and Steam97 Excel Add-Ins

- List of available functions in the Steam95 and Steam97 Excel Add-Ins




Steam diagrams

- logP-H diagram in SI units generated with Steam97 Excel Add-In 


Price info

Prices subject to change without notice!

A license includes 32 bit and 64 bit version of the library.


Steam9597 Excel Add-In version 3.1
1-4 licensesUSD 399.95 per copy
5 > licensesUSD 349.95 per copy
Company wide licenseUSD 11995.00

NOTE:

Each license also includes the following:

  • One year free e-mail technical support
  • One year free minor version updates if available (for example 3.2, 3.x up to, but not including version 4.0)

If you have any questions, please don't hesitate to contact sales at:
sales@megawatsoft.com


General Information

For quick access to the Steam9597 Excel Add-In, you may purchase and download our product using automated and secure online ordering system. After ordering, you will receive a notification mail with further instructions, your password (required during installation) and the retail version download location.

The Registration includes a free subscription program. Each Registered user will be receiving bug fixes and technical support for the registered version within one year.

Shipping by the postal mail is not available.



How to order

1. Internet ordering

Available ordering options (open an order form to select):

  • Credit Card (Visa®, Mastercard®, American Express®, Discover®)
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To buy a specific number of licenses for the Steam9597 Excel Add-In click the button: Open order page for the Steam9597 Excel Add-In or to purchase a Company Wide License contact sales at: sales@megawatsoft.com.


2. Bank Direct Payment

If you prefer to pay for the product by "Bank Direct Payment", contact sales at: sales@megawatsoft.com.