Skip to main content
U.S. flag

An official website of the United States government

Data from Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner

Published by National Institute of Standards and Technology | National Institute of Standards and Technology | Catalog Last Checked: August 02, 2025 at 02:09 PM | Dataset Last Updated: October 11, 2019
These data from the laboratory tests of a prototype residential liquid-to-air ground-source air conditioner (GSAC) using CO2 as the refrigerant. The data collection and processing methods are described in detail in this report: Report Title: "Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner", NIST Technical Note 2068 Publication Date: October 2019 DOI: https://doi.org/10.6028/NIST.TN.2068 Authors: Harrison Skye, Wei Wu The tests were performed in an environmental chamber and followed the ISO 13256-1 standard for rating GSHPs. The CO2 GSAC operated either in a subcritical or a transcritical cycle, depending on the entering liquid temperature (ELT). The test results included the coefficient of performance (COP), capacity, sensible heat ratio (SHR), and pressures. The system incorporated a liquid-line/suction-line heat exchanger (LLSL-HX), which was estimated to cause a COP penalty of (0 to 2) % for ELTs ranging (10 to 25) °C, and benefit of (0 to 5) % for ELTs ranging (30 to 39) °C. With ELTs ranging (10 to 39) °C the CO2 system cooling COP ranged (7.3 to 2.4). At the standard rating condition (ELT 25 °C), the CO2 GSAC cooling COP was 4.14, and at part-load conditions (ELT 20 °C) the system had a COP of 4.92.

Resources

7 resources available

  • DOI Access for Data from Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner

    FILE
    Visit Page

  • Readme

    .TXT
    Download

  • Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068

    COMMA SEPARATED VALUES (CSV)
    Download

  • Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068

    MICROSOFT EXCEL (*.XLSX)
    Download

  • SHA256 File for Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068

    TEXT/PLAIN
    Download

  • SHA256 File for Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068

    TEXT/PLAIN
    Download

  • SHA256 File for Readme

    TEXT/PLAIN
    Download

Find Related Datasets

Search by Tags

Click any tag below to search for similar datasets

Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "006:55"
]
contactPoint 
{
  "fn": "Harrison M. Skye",
  "hasEmail": "mailto:harrison.skye@nist.gov"
}
description These data from the laboratory tests of a prototype residential liquid-to-air ground-source air conditioner (GSAC) using CO2 as the refrigerant. The data collection and processing methods are described in detail in this report: Report Title: "Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner", NIST Technical Note 2068 Publication Date: October 2019 DOI: https://doi.org/10.6028/NIST.TN.2068 Authors: Harrison Skye, Wei Wu The tests were performed in an environmental chamber and followed the ISO 13256-1 standard for rating GSHPs. The CO2 GSAC operated either in a subcritical or a transcritical cycle, depending on the entering liquid temperature (ELT). The test results included the coefficient of performance (COP), capacity, sensible heat ratio (SHR), and pressures. The system incorporated a liquid-line/suction-line heat exchanger (LLSL-HX), which was estimated to cause a COP penalty of (0 to 2) % for ELTs ranging (10 to 25) °C, and benefit of (0 to 5) % for ELTs ranging (30 to 39) °C. With ELTs ranging (10 to 39) °C the CO2 system cooling COP ranged (7.3 to 2.4). At the standard rating condition (ELT 25 °C), the CO2 GSAC cooling COP was 4.14, and at part-load conditions (ELT 20 °C) the system had a COP of 4.92.
distribution 
[
  {
    "title": "DOI Access for Data from Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner",
    "accessURL": "https://doi.org/10.18434/M32142"
  },
  {
    "title": "Readme",
    "format": ".txt",
    "mediaType": "text/plain",
    "description": "Description of the dataset",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/README.txt"
  },
  {
    "title": "Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068",
    "format": "Comma Separated Values (CSV)",
    "mediaType": "application/vnd.ms-excel",
    "description": "This data is from the appendix of the publication. The data are for the system at steady state, and are an average of 120 samples taken over 30 minutes.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/CO2_GSAC_Lab_Tests%20%28TN%202068%29%20-%20Appendix%20data.csv"
  },
  {
    "title": "Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068",
    "format": "Microsoft Excel (*.xlsx)",
    "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "description": "This data is from the appendix of the publication. The data are for the system at steady state, and are an average of 120 samples taken over 30 minutes.",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/CO2_GSAC_Lab_Tests%20%28TN%202068%29%20-%20Appendix%20data.xlsx"
  },
  {
    "title": "SHA256 File for Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068",
    "mediaType": "text/plain",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/CO2_GSAC_Lab_Tests%20%28TN%202068%29%20-%20Appendix%20data.csv.sha256"
  },
  {
    "title": "SHA256 File for Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner, NIST Technical Note 2068",
    "mediaType": "text/plain",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/CO2_GSAC_Lab_Tests%20%28TN%202068%29%20-%20Appendix%20data.xlsx.sha256"
  },
  {
    "title": "SHA256 File for Readme",
    "mediaType": "text/plain",
    "downloadURL": "https://data.nist.gov/od/ds/mds2-2142/README.txt.sha256"
  }
]
identifier ark:/88434/mds2-2142
issued 2020-01-13
keyword 
[
  "Air conditioner",
  "CO2",
  "carbon dioxide",
  "ground-source heat pump",
  "subcritical and transcritical cycles"
]
landingPage https://data.nist.gov/od/id/mds2-2142
language 
[
  "en"
]
license https://www.nist.gov/open/license
modified 2019-10-11 00:00:00
programCode 
[
  "006:045"
]
publisher 
{
  "name": "National Institute of Standards and Technology",
  "@type": "org:Organization"
}
references 
[
  "https://doi.org/10.6028/NIST.TN.2068"
]
theme 
[
  "Energy:Energy efficiency"
]
title Data from Laboratory Tests of a Prototype Carbon Dioxide Ground-Source Air Conditioner

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov