Performane Of A Modified Drive Mechanism On A Low Temperature Differential Stirling Engine
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Bibliographic record
Abstract
Stirling engines are a variety of heat engines which are capable of using heat from various sources including low temperature renewables. This work examines the drive train modifications and performance results of a lab scale low temperature gamma type Stirling engine operating between a source and sink temperature of 94 C and 5 C respectively. The drive train was modified to use non-circular gears to dwell the engine piston motion in an effort to improve the thermodynamic work of the engine cycle. A variety of dwelling piston configurations were tested, both for the engine displacer and power pistons. Results indicate that dwelling the displacer piston reduced the engine power output by up to 27% when compared to the conventional drive mechanism, while dwelling the power piston had negligible impact on power output. Gearing the displacer piston to have shorter dwell times with slower displacement speeds did result in faster running speeds at lower engine loads, with a minor 4% improvement to maximum engine power in the best configuration.
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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) | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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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