Performance evaluation of a magnetic refrigeration system
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
This work presents an evaluation of the thermodynamic performance of a magnetic refrigerator prototype developed at the Federal University of Santa Catarina. Experiments were carried out to determine the power consumption of the system as a whole, and of its main components (sub-systems) individually. The transmission powers associated with the system components were computed from the torques required to drive each sub-system at frequencies between 0.2 and 1.6 Hz. Thermodynamic efficiency parameters, namely the coefficient of performance and the second-law efficiency were computed. Maximum values of the coefficient of performance and second-law efficiency of 2.5 and 3.7%, respectively, were obtained at system temperature spans of 4 and 6 K. The maximum zero-span cooling capacity was approximately 150 W. The major limitations to enhancing the system performance were the losses in the flow management sub-system (pumping power and valve losses). Improving the operation of the components in this system would lower their power requirements for a given fluid flow rate, which would increase the overall efficiency of the system.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.002 | 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 | 0.001 |
| 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