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Assessing the Compatibility of Work System Factors Through an Integrative Model: A Case Study

100%

Wallace S. , Shoaf C. , Genaidy A. M. , Karwowski W.

International Journal of Occupational Safety and Ergonomics

2003

tom Vol. 9, No. 1

27--35

Work Factor Compatibility (WFC) theory proposes that human performance is dependent on the interaction of various components (e.g., physical and mental task demands, physical environment, social environment) of the work system and integrates multiple human performance perspectives into a single mathematical model. Work Factor Analysis (WFA) is a comprehensive survey administered to employees to determine the WFC index. WFA also provides recommendations for targeting specific work system areas for improvement. Preliminary testing oft he tool was conducted at a manufacturing operation of a Fortune 10 company. Results are discussed and recommendations for further study are made.

Improved combustion in high EGR dilution CNG engines and fuel reforming with exhaust gas

51%

Wyszyńska M. L. , Megaritis A. , Allenby S. , Al-Ahmadi A. , Chang W.-C. , Abu-Orf G. , Clarke S. , Davies M. J. , Richardson D. , Shillington S. A. C. , Wallace S. , Bhattacharya A. K. , Hayden P. , Sarginson J. S. , Frost J. C. , Golunski S. E.

Archivum Combustionis

2000

tom Vol. 20 nr 3-4

19-29

The supplementation of compressed natural gas (CNG) fuel with a hydrogen-rich additive, via an exhaust gas reforming process, potentially offers significant improvements in cobustion stability and tolerance of exhaust gas recirculation (EGR). An experiment was conducted on a purpose built single-cylinder test engine to evaluate the envelope of benefit of hydrogen enrichment in terms of extended EGR tolerance. The tolerance of the stoichiometric CNG engine to EGR, measured in terms of combustion stability, is shown to be greatly extended by the hydrogen enrichment and corresponding improvements in engine emission were found. Further work was undertaken, using a micro-reactor test rig, to assess the exhaust-gas reforming process. The performance of prototype catalysts was found to correlate well with the hydrogen requirements indicated by the envelope of benefit testing.