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In anticipation of more stringent MACT, NSPS and RACT rules for rich burn engines, the Compressor and Pump Station Committee of the Pipeline Research Council International took on support of further testing with a focus on technologies that could improve the performance of NSCR systems. In 2009, they funded a Hoerbiger led long term field demonstration test of integrated state of the art technologies on a typical high speed engine. The test demonstrated successful NSCR operation for several months at extremely low SCAQMD BACT levels with the ability to self-detect out of compliance operation if and when it occurred. In 2010, PRCI funded two follow-on tests of KVG-10 engines, typical of pipeline units, fitted with NSCR. The first test, led by Hoerbiger with AETC acting as a subcontractor, examined the response of an integrated system on this engine type. The second project, led by AETC, examined what could be achieved by advanced sensors alone when applied to a legacy controller. The test results confirmed that advanced upstream UEGO sensors offered similar performance on pipeline engines as demonstrated on high speed engines. In particular the NSCR systems exhibited the expected NOx/CO response with wide operating ranges and similar predictable performance with two very different controllers. The systems stayed in compliance for months. Likewise, downstream ECM NOxCAN sensors also work well on pipeline engines exhibiting similar NOx and CO (NH3) sensitivities. However the available off the shelf controllers do not fully utilize the potentials offered by these sensors. Current AFR controllers do not use the lambda sensor during startup since the traditional lambda sensors are typically useless at low temperature. This leads to extremely rich operation during startup and high exhaust temperatures. In addition, currently available AFR controllers are designed around inexpensive lambda sensors which require heavy signal conditioning. This actually degrades the better si
Your Price $195.00
List Price $195.00