Liquid hydrogen and liquid oxygen propellants require cryogenic property data. REFPROP 9 includes the most recent EOS for ortho-para hydrogen mixtures, which is vital for long-term fuel storage in space missions.
Connect to the DLL using libraries like ctypes or wrapper packages like CoolProp (which can load the REFPROP shared library) for automated data analysis and script-based workflows.
Before REFPROP, engineers often used "best guesses" or simplified equations like the Martin-Hou model
REFPROP 9 is not an academic toy. It is used daily in high-stakes industrial environments. nist refprop 9
As of 2024, . The current version is 10.0 (build 2024-04-15). However, owners of a legacy license can often redownload version 9 from the NIST official website using their original credentials.
REFPROP 9 is not just a standalone application; it is designed to be integrated into other platforms. It provides dynamic link libraries (DLLs) that allow users to plug REFPROP 9 directly into LabVIEW, Excel, Visual Basic, or MATLAB environments. Common Applications of REFPROP 9
For researchers and engineers who need the , REFPROP 9.1 still delivers results that are trusted worldwide—provided users are aware of its known issues and limitations. As the saying in the CFD community goes, "REFPROP is incredibly fragrant" (很香), meaning it's a joy to use because it just works—but like any powerful tool, it requires proper understanding and handling. Before REFPROP, engineers often used "best guesses" or
NIST REFPROP 9 is a widely cited legacy database used for calculating high-accuracy thermodynamic and transport properties of fluids, often employed in cryogenics, power cycles, and aerospace applications. While version 10 is current, version 9 remains critical for validating against established technical reports and in legacy software applications. For more details, visit NIST .
Simulating cycles like Rankine cycles for OTEC plants or refrigeration systems. Key Capabilities of REFPROP 9
Accurate density and composition calculations for hydrocarbons. The current version is 10
While REFPROP 9 introduced foundational improvements in threadsafety, 64-bit support, and mixture convergence, version 10 builds upon this legacy with:
The software is widely used to calculate essential properties, including:
NIST REFPROP (Reference Fluid Thermodynamic and Transport Properties Database) is a standard reference tool developed and maintained by the U.S. National Institute of Standards and Technology (NIST). It was created to provide engineers and scientists with reliable, calculated property data, serving as an authoritative source for research, design, and analysis across various industries. The program is a commercial product, distributed through NIST's Standard Reference Data program, and is widely recognized for incorporating the most accurate property models available worldwide.
