Condensation of R-134a inside the Vertical Smooth and Dimpled Helically Coiled Tubes
Bibliographic record
Abstract
An experimental study has been carried out to study the frictional pressure drops during condensation of R-134a vapours while flowing inside the vertically positioned smooth and dimpled helically coiled tubes. The tests were conducted at the mass flux of 115 to 190 kg.m -2 .s - . The saturation temperature of the R-134a condensing vapour remained 35 o C. The effect of the mass flux and vapour quality on frictional pressure drops was investigated. In addition, a comparison has also been made for the frictional pressure drop between the vertical smooth helically coiled tube and the dimpled helically coiled tube. The experimental results showed that for the same mass flux, the dimpled helical coiled tube has a higher frictional pressure drop compared to the smooth helically coiled tube. Moreover, a comparison of the experimental frictional pressure drop data for vertical smooth helically coiled tubes with that of renowned correlations has also been made. The correlations predicted the experimental data in an error band of 30%.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".