A Fuel Ratio Method for Estimating the MESG of Nitrogen-Diluted and Oxygen-Enriched Fuels, Including the Brandes-Redecker Method to Estimate the MESG of Mixed Fuels
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: March 21, 2010
- Duration: 30 minutes
- Skill Level: Intermediate
- PDHs: 0.50
Properly specifying electrical equipment for hazardous (classified) areas requires information about certain properties of the materials anticipated to be present. While it is a straight-forward procedure to test a product or stored intermediate in order to establish a Group designation, testing is not in-expensive. Additional difficulty can arise when the electrical equipment design must account for in-process compositional variations.
This paper expands on published MESG data for four nitrogen-diluted and oxygen-enriched fuels, hydrogen, ethylene, propane, and methane. The data is compared to predictions of the NFPA-497 pseudo-MESG technique to account for nitrogen dilution. A new Fuel Ratio method is presented, which provides a closer, more conservative estimation of nitrogen-diluted mixture properties. The Fuel Ratio method is also applicable to oxygen-enriched fuel streams.
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|AIChE Undergraduate Student Members||Free|