Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2)
Thermal conductivity measurements of eight binary refrigerant mixtures were conducted in the homogeneous liquid and vapour phases with the transient hot-wire technique. The temperature range of the measurements spanned from (224.3 to 386.6) K with pressures ranging between (1.0 and 6.5) MPa. The bin...
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Elsevier Ltd.
2020
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| _version_ | 1796865708055855104 |
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| author | Kim, D. Yang, X. Niya, A. A. Rowland, D. Xiao, X. Al Ghafri, S. Z. S. Tsuji, T. Tanaka, Y. Seiki, Y. May, E. F. |
| author_facet | Kim, D. Yang, X. Niya, A. A. Rowland, D. Xiao, X. Al Ghafri, S. Z. S. Tsuji, T. Tanaka, Y. Seiki, Y. May, E. F. |
| author_sort | Kim, D. |
| collection | ePrints |
| description | Thermal conductivity measurements of eight binary refrigerant mixtures were conducted in the homogeneous liquid and vapour phases with the transient hot-wire technique. The temperature range of the measurements spanned from (224.3 to 386.6) K with pressures ranging between (1.0 and 6.5) MPa. The binary mixtures were equimolar (R125 + R32), (R32 + R134a), (R32 + CO2), (R125 + R134a), (R125 + CO2), (R134a + R1234yf), (R134a + CO2) and (R1234yf + CO2). Additionally, two multi-component mixtures, (R32 + R1234yf + CO2) and (R32 + R1234yf + R134a + R125 + CO2), were investigated. The transient hot-wire apparatus was validated with measurements of pure CO2 in the liquid and vapour regions. The relative combined expanded uncertainty (k = 2) in the experimental thermal conductivity was on the order of 2.0%. The relative deviations of the measured thermal conductivities in the vapour phase from those calculated using the extended corresponding states (ECS) model with default binary interaction parameters (BIPs), as implemented in the software REFPROP 10, were between (−12 and +8) %, while those in the liquid phase were between (−15 and +4) %. The new experimental data were used to tune the BIPs in the ECS model. Significant improvements were observed especially in the liquid phase of the five-component mixture, with the root-mean-square of the relative difference between the experimental data and the model estimation reduced by a factor of nearly three. |
| first_indexed | 2024-03-05T21:01:10Z |
| format | Article |
| id | utm.eprints-93862 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T21:01:10Z |
| publishDate | 2020 |
| publisher | Elsevier Ltd. |
| record_format | dspace |
| spelling | utm.eprints-938622022-01-31T08:36:52Z http://eprints.utm.my/93862/ Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) Kim, D. Yang, X. Niya, A. A. Rowland, D. Xiao, X. Al Ghafri, S. Z. S. Tsuji, T. Tanaka, Y. Seiki, Y. May, E. F. T58.5-58.64 Information technology Thermal conductivity measurements of eight binary refrigerant mixtures were conducted in the homogeneous liquid and vapour phases with the transient hot-wire technique. The temperature range of the measurements spanned from (224.3 to 386.6) K with pressures ranging between (1.0 and 6.5) MPa. The binary mixtures were equimolar (R125 + R32), (R32 + R134a), (R32 + CO2), (R125 + R134a), (R125 + CO2), (R134a + R1234yf), (R134a + CO2) and (R1234yf + CO2). Additionally, two multi-component mixtures, (R32 + R1234yf + CO2) and (R32 + R1234yf + R134a + R125 + CO2), were investigated. The transient hot-wire apparatus was validated with measurements of pure CO2 in the liquid and vapour regions. The relative combined expanded uncertainty (k = 2) in the experimental thermal conductivity was on the order of 2.0%. The relative deviations of the measured thermal conductivities in the vapour phase from those calculated using the extended corresponding states (ECS) model with default binary interaction parameters (BIPs), as implemented in the software REFPROP 10, were between (−12 and +8) %, while those in the liquid phase were between (−15 and +4) %. The new experimental data were used to tune the BIPs in the ECS model. Significant improvements were observed especially in the liquid phase of the five-component mixture, with the root-mean-square of the relative difference between the experimental data and the model estimation reduced by a factor of nearly three. Elsevier Ltd. 2020-12 Article PeerReviewed Kim, D. and Yang, X. and Niya, A. A. and Rowland, D. and Xiao, X. and Al Ghafri, S. Z. S. and Tsuji, T. and Tanaka, Y. and Seiki, Y. and May, E. F. (2020) Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2). The Journal of Chemical Thermodynamics, 151 . ISSN 0021-9614 https://doi.org/10.1016/j.jct.2020.106248 DOI: 10.1016/j.jct.2020.106248 |
| spellingShingle | T58.5-58.64 Information technology Kim, D. Yang, X. Niya, A. A. Rowland, D. Xiao, X. Al Ghafri, S. Z. S. Tsuji, T. Tanaka, Y. Seiki, Y. May, E. F. Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title | Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title_full | Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title_fullStr | Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title_full_unstemmed | Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title_short | Thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons (HFC-32, HFC-125, HFC-134a), hydrofluoroolefins (HFO-1234yf), and carbon dioxide (CO2) |
| title_sort | thermal conductivity measurements of refrigerant mixtures containing hydrofluorocarbons hfc 32 hfc 125 hfc 134a hydrofluoroolefins hfo 1234yf and carbon dioxide co2 |
| topic | T58.5-58.64 Information technology |
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