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 Name Steam95 Steam97
  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.

'Calculate saturation pressure for given temperature
ps = CallFunction("SatTXsi", t, xLiquid, "p")
Worksheets("Heat of Evaporation").Cells(row, 2).Value = ps

'Calculate specific enthalpy of the liquid on the saturation line
hLiquid = CallFunction("SatTXsi", t, xLiquid, "h")
Worksheets("Heat of Evaporation").Cells(row, 3).Value = hLiquid

'Calculate specific enthalpy of the vapor on the saturation line
hVapor = CallFunction("SatTXsi", t, xVapor, "h")
Worksheets("Heat of Evaporation").Cells(row, 4).Value = hVapor

'Calculate heat of evaporation
delta_h = hVapor - hLiquid
Worksheets("Heat of Evaporation").Cells(row, 5).Value = delta_h

Example 2

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

'Calculate specific enthalpy
hIn = CallFunction("SteamPTsi", pIn, tIn, "h")
Worksheets("Steam Turbine").Cells(row, 3).Value = hIn

'Calculate specific entropy
sIn = CallFunction("SteamPTsi", pIn, tIn, "s")
Worksheets("Steam Turbine").Cells(row, 4).Value = sIn

Worksheets("Steam Turbine").Cells(row, 5).Value = pOut
Worksheets("Steam Turbine").Cells(row, 6).Value = tOut

'Calculate specific enthalpy
hOut = CallFunction("SteamPTsi", pOut, tOut, "h")
Worksheets("Steam Turbine").Cells(row, 7).Value = hOut

'Calculate specific enthalpy
hs = CallFunction("SteamPSsi", pOut, sIn, "h")
Worksheets("Steam Turbine").Cells(row, 8).Value = hs

'Calculate steam turbine efficiency
eta = (hIn - hOut) / (hIn - hs) * 100
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 licenses USD 399.95 per copy
5 > licenses USD 349.95 per copy
Company wide license USD 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®)
  • PayPal

To buy a specific number of licenses for the Steam9597 Excel Add-In click the button: 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.