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    • NIST Vapor Compression Cycle Design Program : CYCLE_D - SRD 49

    Metadata Updated: September 30, 2025

    CYCLE_D simulates vapor compression refrigeration cycles that use single-compound refrigerants or refrigerant blends. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquid-line/suction-line heat exchanger. In addition, the model can simulate a subcritical two-stage economizer cycle, a subcritical three-stage economizer cycle, and a subcritical two-stage compression cycle with intercooling. CYCLE_D includes 75 single-compound refrigerants and 113 predefined blends. Single-compound fluids can be combined to form blends of up to ten components. Computationally, the program is fully compatible with the NIST Reference Fluid Thermodynamic and Transport Properties - REFPROP, Version 10.0.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://www.nist.gov/srd/nist-standard-reference-database-49

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date September 30, 2025

    Metadata Source

    Harvested from Commerce Non Spatial Data.json Harvest Source

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date September 30, 2025
    Publisher National Institute of Standards and Technology
    Maintainer
    Identifier ECBCC1C130292ED9E04306570681B10747
    Data First Published 2019-08-12
    Language en
    Data Last Modified 2018-09-01 00:00:00
    Category Buildings and Construction:Air conditioning and heating equipment, Standards:Reference materials
    Public Access Level public
    Bureau Code 006:55
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id dab30ef9-55cf-4e26-a302-bed038a805a9
    Harvest Source Id bce99b55-29c1-47be-b214-b8e71e9180b1
    Harvest Source Title Commerce Non Spatial Data.json Harvest Source
    Homepage URL https://www.nist.gov/srd/nist-standard-reference-database-49
    License https://www.nist.gov/open/license
    Program Code 006:052
    Related Documents https://www.nist.gov/srd/nist-standard-reference-database-49
    Source Datajson Identifier True
    Source Hash 3d29d25ce2d96c7c299b3fd8369b3aa0a15fff8506c9abed66c79e1c5e962330
    Source Schema Version 1.1

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