© 2024 Jasper van Baten, AmsterCHEM


Welcome to REFPROP CAPE-OPEN. This program provides a CAPE-OPEN versions 1.0 and 1.1 interface to NIST's REFPROP application. For this program to work, a separate installation of NIST's REFPROP version 8 or later must be present on your system. For more information about REFPROP, see the NIST web site.


CAPE-OPEN is an open standard for interoperability of chemical process engineering applications. CAPE is an acronym for Computer Aided Process Engineering. The CAPE-OPEN standards are freely available from the CAPE-OPEN Laboratory Networks.

CAPE-OPEN defines standards for interaction of many types of process engineering software components; this implementation uses the Thermodynamic and Physical Property standard description versions 1.0 and 1.1 to allow CAPE-OPEN compliant applications to use REFPROP for their thermodynamic calculations. Such programs can be flowsheet simulation applications (for example COCO), or any other type of application that requires thermodynamic and physical property calculations or thermodynamic phase equilibrium calculations. One could for example use CAPE-OPEN to import thermodynamic calculations into Matlab (see Matlab CAPE-OPEN Thermo Import).

CAPE-OPEN standard version

REFPROP CAPE-OPEN implements the CAPE-OPEN versions 1.0 and 1.1 thermodynamic standard implementation. It is therefore compatible with newer applications that implement the version 1.1 standard, as well as with older applications that implement the version 1.0 standard. For better performance, a wider definition of properties, availability of two-phase composition derivatives and more flash types, use of version 1.1 of the CAPE-OPEN standard is advised if supported by the hosting simulation application.


The REFPROP CAPE-OPEN application has been written by Jasper van Baten, AmsterCHEM (C) 2021.

REFPROP CAPE-OPEN requires a separate installation and license of REFPROP.

REFPROP is NIST's Standard Reference Database by E.W. Lemmon, M.L. Huber, and M.O. McLinden, NIST Physical and Chemical Properties Division (C) 2010 by the U.S. Secretary of Commerce on behalf of The United States of America. All Rights Reserved.


NIST uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.

There is no warranty for REFPROP CAPE-OPEN, to the extent permitted by applicable law. The program and its components are "as is" without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the program and its components is with you. Should the program or one of its components prove defective, you assume the cost of all necessary servicing, repair or correction.

In no event unless required by applicable law or agreed to in writing will any copyright holder, or any other party who may redistribute the program and its components as permitted above, be liable to you for damages, including any general, special, incidental or consequential damages arising out of the use or inability to use the program or its components (including but not limited to loss of data or data being rendered inaccurate or losses sustained by you or third parties or a failure of the program to operate with any other programs), even if such holder or other party has been advised of the possibility of such damages.

Calculation methods
COM registration
Compound constants
Configuring Property Packages
Editing Property Packages
Flash calculations
Fluid files
Getting started
Mixture coefficients
Mixture properties
Property derivatives
Property Package files
Single-phase properties
Supported properties
Temperature dependent properties
Two-phase properties
User data
 Getting started
 Configuring Property Packages
 Supported calculations