A Systematic Approach For Performance Comparisons Of Nox Converter Designs
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A Systematic Approach for Performance Comparisons of NOx Converter Designs
In today's vehicle applications, Selective Catalytic Reduction (SCR) ammonia dosing is completed using complex control algorithms that need to be parameterized for the individual catalytic converter technology. The parameterization of these control strategies is not always completed during the early design phase (i.e., simulation studies and laboratory tests), as this procedure is very time consuming. This results in catalytic converter screenings being completed with dosing strategies that do not allow for the observation of the true potential of each catalytic converter. Therefore, a challenge arises in the effective design of catalytic converters. This work presents a simulation-based method for the automated optimization of a simple ammonia dosing strategy, which can easily be used for simulations during the early catalytic converter design phase. The dosing strategy relies on a look-up table whose entries relate a desired ammonia surface coverage to a catalyst temperature. These entries are optimized for a given driving cycle to maximize the NOx conversion and fulfill the desired ammonia slip constraints. Using this strategy, comparisons of SCR catalyst technologies (iron and copper zeolite SCR) and catalyst volumes during driving cycles are completed. Likewise, the dosing strategy is applied to a catalytic converter configuration consisting of a front-end SCR and a back-end Ammonia Slip Catalyst (ASC) to study how an ASC can assist in meeting regulatory requirements during driving cycles.
Diesel Engine System Design
Diesel Engine System Design links everything diesel engineers need to know about engine performance and system design in order for them to master all the essential topics quickly and to solve practical design problems. Based on the author's unique experience in the field, it enables engineers to come up with an appropriate specification at an early stage in the product development cycle. - Links everything diesel engineers need to know about engine performance and system design featuring essential topics and techniques to solve practical design problems - Focuses on engine performance and system integration including important approaches for modelling and analysis - Explores fundamental concepts and generic techniques in diesel engine system design incorporating durability, reliability and optimization theories
Process Steam Systems: A Practical Guide for Operators, Maintainers, Designers, and Educators
Process Steam Systems A comprehensive and accessible handbook for process steam systems The revised second edition of Process Steam Systems: A Practical Guide for Operators, Maintainers, Designers, and Educators delivers a practical guide to ensuring steam systems are properly and efficiently designed, operated, and maintained. The book provides comprehensive information designed to improve process steam system knowledge, reliability, and integration into current manufacturing processes. The most up-to-date version of this volume includes brand-new coverage of current codes, sustainability measures, and updated applications. Heat transfer theory and thermodynamics are tied into practical applications with new practice problems ideal for both professionals seeking to improve their skills and engineers-in training. Readers will also find: Thorough design criteria for process steam systems, complete with detailed illustrations for piping and controls An entirely new chapter on the history of steam systems, including the evolution of the ASME code and boiler accidents Revised coverage of current NFPA, ASME, CSD-1, FM, and building codes, as well as new insurance requirements relevant to practitioners in the industry Expansive design guidance for steam system efficiency upgrades Perfect for operations and maintenance staff at manufacturing, healthcare, and commercial laundries, Process Steam Systems: A Practical Guide for Operators, Maintainers, Designers, and Educators will also earn a place in the libraries of consulting engineers and engineering students with an interest in process manufacturing.