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Ingersoll Rand SVG engines have an inherently poor combustion air scavenging capability and therefore require proper exhaust system design to maximize gas flow efficiency through the engine and out of the silencer tail piece. Inadequate engine air scavenging capability increases risk of incomplete combustion due to lingering exhaust gases in each cylinder after the combustion cycle has completed. Excessive exhaust system back pressure reduces the velocity of the gas traveling through the system and increases its residence time on the manifold piping, elevating system temperatures. Combustion may richen as the cylinders make higher combustion pressures to push the exhaust gas out of the manifold. Higher exhaust temperatures exceed catalytic converter element limitations, and greatly reduce its operative life. Original equipment dry manifolds are prone to exhaust leaks due to corrosion, especially if they have been insulated for many years. Air/ fuel ratio control systems, then, cannot accurately control the emissions of the engine because excess oxygen levels are entrained into the exhaust stream fooling the oxygen sensor into thinking the engine is running too lean. This combination of marginal combustion scavenging, improper exhaust system design, and degraded OEM dry manifolds will bring operational challenges to air/fuel ratio controller and oxidation catalytic converter hardware combination installations. Dresser Rand Enginuity encountered these challenges at TransCanada’s Kewaskum facility, of which operates four Ingersoll Rand SVG12 engines. The following is a summary of the approach taken to identify the problem and develop a solution to keep these engines in compliance for years to come: 1. Baseline testing on all engines gathering exhaust backpressure and temperature data at multiple engine operating conditions 2. Several 1-D analysis trials using a few exhaust system designs with the intent to design a replacement exhaust system so that the catalytic conve
Your Price $195.00
List Price $195.00