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| Content Provider | Springer Nature Link |
|---|---|
| Author | Heinen, M. Isosaari, E. |
| Copyright Year | 2008 |
| Abstract | Small triple-point-of-water cells (mini-TPW) are used in laboratories to monitor the stability of PRTs. Compared with a standard TPW cell, heat flow in the thermometer well usually disturbs the apparent equilibrium temperature to a larger extent in a mini-TPW cell due to its smaller dimensions. In this paper, the heat flow effect is studied on the basis of experimental data. Special attention is paid to the thermal conduction along a thin thermometer probe and to the self-heating of the probe. A new method for compensating the error due to the heat flow is presented. It is shown that the compensated results are in good agreement with results obtained with standard TPW cells. The determined differences were well within the estimated expanded uncertainty of 2 mK (k = 2). The heat flow effect was studied experimentally by controlling the temperature of the upper part of a PRT inserted in a mini-TPW cell. Also, the effect of different fillings of the measurement well of the cell was studied. Without the compensation, thin metal-sheathed PRTs (1.6 and 2.2 mm) indicated 3 to 9 mK differences between mini-TPW and standard TPW cells. |
| Starting Page | 836 |
| Ending Page | 843 |
| Page Count | 8 |
| File Format | |
| ISSN | 0195928X |
| Journal | International Journal of Thermophysics |
| Volume Number | 29 |
| Issue Number | 3 |
| e-ISSN | 15729567 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2008-04-02 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Mini-TPW Thermal conduction Triple point of water Physical Chemistry Industrial Chemistry/Chemical Engineering Mechanics Condensed Matter |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics |
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