Analytical model for Archimedes screw generators with rotating trough
Bibliographic record
Abstract
With growing energy needs, new technologies for energy generation have become an important focus. In the hydraulic and hydropower field, Archimedes screw generators (ASGs) have shown a good potential for sites with low flow rates (below 6 m3 s−1) and low heads (below 5 m). Usually, an ASG is built as a screw rotating within a fixed trough. In some cases, the trough is directly affixed to the screw and rotates with it, corresponding to the so called RASG (rotating-trough Archimedes screw generator). In this study, a RASG was investigated, and an analytical model was proposed to design these screws. The model includes different types of power losses related to friction, inlet and outlet flow and overfilling. Additionnally, experimental tests were conducted with a laboratory-scale screw. Experimental results allowed for validating the model with a relative error below 9%. Moreover, the RASG performed similarly to ‘traditional’ ASGs with efficiencies up to 90%.
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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 | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.002 |
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".