Centrifugal Compressor Performance Deviations with Various Refrigerants, Impeller Sizes and Shaft Speeds
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Under the pressure of the Montreal Protocol originally written in 1987, the current popularly used HCFC and HFC refrigerants for comfortable air conditioning, such as low pressure refrigerant R123, will have to be phased out in the near future. This forces companies in centrifugal chiller industry to redesign and retest new centrifugal compressors which can accommodate alternative refrigerants. Keeping the present flow path designs is an economic design process for the alternative refrigerants, and is well adapted by companies in this industry. In addition extensively employ the flow similitude theory is also an effective way to minimize the cost of lab tests. However employing similitude in compressible flow does not forecast the content in which compressors meet the uncontrollable situations such as choke and surge. Conclusions can only be drawn from experimental data [Dixon, Ferguson]. This paper will present the theory and experimental verification for a low cost method to predict the compressor performance under an alternative refrigerant based on existing compressor maps. A few factors that affect compressor performance maps, but whose effects cannot be predicted by similitude theory are also analyzed by reviewing large amount of tested data.
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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 it