The Effect of Membrane Deflections on Flow Rate in Crossflow Air-to-Air Exchangers
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Bibliographic record
Abstract
Manufacturing of air-to-air heat and moisture crossflow exchangers can result in membrane surfaces with significant deflections due to moderate pressure differences across the membrane under normal operating conditions. This paper presents a methodology for the determination of membrane deflections for two types of support systems. Both initial slack and pre-stressed membranes are considered. Experimental data for two types of membrane are presented, which confirms the theoretical model of membrane elastic deflections. It is shown for fully developed laminar flow in crossflow exchangers that significant flow differences will occur in the supply and exhaust flow channels for the same pressure drop across the exchanger. It is concluded that these crossflow exchangers should be manufactured with pre-stressed membranes, and a good support scheme should be chosen to minimize the effect of membrane deflections on the exchanger performance.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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