Currently Reliable Property Values And Simple Equation For Pure Hydrofluorocarbons
Bibliographic record
Abstract
In 1994, the JSRAE published JARef, Vol. 1, 'HFCs and HCFCs,' JAR Thermodynamic Tables, Vol. 1, Version 1.0, which provides the thermodynamic properties of 12 refrigerants by a printed form and a software.At the time reliable experimental data for new alternative refrigerants were qualitatively and quantitatively limited, some of the properties had to be estimated.Many reliable experimental data and theoretical information have been accumulated till present especially for pure hydrofluorocarbons (HFCs), e.g., the ideal gas heat capacity was derived experimentally and theoretically with an uncertainty of ±0.1 %, and many transport properties were reported.In addition, the new molar gas constant and molar masses were defined recently as the international standards.The review of the thermodynamic and transport properties is conducted mainly for HFCs in the JSRAE.Recommended critical parameters and simple equations of the vapor pressures, saturated liquid density, virial coefficients, surface tension, viscosity, and thermal conductivity are introduced and compared with selected experimental data.The information on material compatibility is also provided.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.006 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.004 | 0.004 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.005 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.021 | 0.027 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".