Experimental studies of Heat Exchangers for Diesel Generator
Bibliographic record
Abstract
The heat exchangers play a big role in industrial application, their efficiency is an essential target for the users.Four shell and tube heat exchangers are designed, built, and tested using diesel generator.The performance characteristics of heat exchangers have been investigated experimentally by analyzing heat transfer rate, overall heat transfer coefficient and effectiveness.The shell and the copper coil dimensions are identical in the four heat exchangers.The mass flow rate of oil was constant for all four-heat exchangers, 0.0207 Ib/s.The results indicated that the heat transfer rate, overall heat transfer coefficient and effectiveness for all four heat exchangers increased with increasing diesel engine RPM.The heat exchanger with circular fins with ten holes (HE-2) showed the highest heat transfer rate and the effectiveness reached up to 32% using heat transfer rate and maximum heat transfer rate, however using number of transfer units and specific heat of oil and water the effectiveness reached 38%.However, the heat exchanger (HE-1) with small internal cylindrical fins on the surface of the coil has the lowest effectiveness 16%.In general, the location and size of fins affect on heat exchanger performance.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".