Abstract
The surface tension of the R290 + R600a mixture has been measured by the differential capillary-rise method. For measuring the binary system, the apparatus was modified to determine the composition of the sample. Seventeen data with a change of composition were obtained at 278.28 K. The experimental uncertainties of temperature and surface tension measurements are estimated to be within 20 mK and 0.2 mN·m-1, respectively. The present data are compared with REFPROP ver.7.0 calculations [1]. As for composition dependence, the present data show different behavior against to REFPROP ver.7.0 calculations. Three kinds of mixing rules were tested for representing the composition dependence of the present data. It is found the simple mixing rule by mole fraction is effective for the R290 + R600a mixture.
| Original language | English |
|---|---|
| Title of host publication | 3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006 |
| Publisher | Society of Air-conditioning and Refrigerating Engineers of Korea, SAREK |
| Publication status | Published - 2006 |
| Externally published | Yes |
| Event | 3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006 - Gyeongju, Korea, Republic of Duration: May 21 2006 → May 23 2006 |
Other
| Other | 3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006 |
|---|---|
| Country | Korea, Republic of |
| City | Gyeongju |
| Period | 5/21/06 → 5/23/06 |
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
Cite this
Measurements of the surface tension for the R290 + R600a mixtures. / Tanaka, Katsuyuki; Higashi, Yukihiro.
3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006. Society of Air-conditioning and Refrigerating Engineers of Korea, SAREK, 2006.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Measurements of the surface tension for the R290 + R600a mixtures
AU - Tanaka, Katsuyuki
AU - Higashi, Yukihiro
PY - 2006
Y1 - 2006
N2 - The surface tension of the R290 + R600a mixture has been measured by the differential capillary-rise method. For measuring the binary system, the apparatus was modified to determine the composition of the sample. Seventeen data with a change of composition were obtained at 278.28 K. The experimental uncertainties of temperature and surface tension measurements are estimated to be within 20 mK and 0.2 mN·m-1, respectively. The present data are compared with REFPROP ver.7.0 calculations [1]. As for composition dependence, the present data show different behavior against to REFPROP ver.7.0 calculations. Three kinds of mixing rules were tested for representing the composition dependence of the present data. It is found the simple mixing rule by mole fraction is effective for the R290 + R600a mixture.
AB - The surface tension of the R290 + R600a mixture has been measured by the differential capillary-rise method. For measuring the binary system, the apparatus was modified to determine the composition of the sample. Seventeen data with a change of composition were obtained at 278.28 K. The experimental uncertainties of temperature and surface tension measurements are estimated to be within 20 mK and 0.2 mN·m-1, respectively. The present data are compared with REFPROP ver.7.0 calculations [1]. As for composition dependence, the present data show different behavior against to REFPROP ver.7.0 calculations. Three kinds of mixing rules were tested for representing the composition dependence of the present data. It is found the simple mixing rule by mole fraction is effective for the R290 + R600a mixture.
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M3 - Conference contribution
BT - 3rd Asian Conference on Refrigeration and Air-Conditioning, ACRA 2006
PB - Society of Air-conditioning and Refrigerating Engineers of Korea, SAREK
ER -