Dissertation/Thesis Abstract

Characterizing the operation of a dual-fuel diesel-hydrogen engine near the knock limit
by Kersting, Lee Allan, M.S., North Dakota State University, 2014, 86; 1568051
Abstract (Summary)

A CAT C6.6 turbocharged diesel engine was operated in dual-fuel diesel-hydrogen mode. Hydrogen was inducted into the intake and replaced a portion of the diesel fuel. Hydrogen was added across multiple engine speeds and loads until reaching the knock limit, identified by a threshold on the rate of in-cylinder pressure rise. In-cylinder pressure and emissions data were recorded and compared to diesel-only operation. Up to 74% H2 substitution for diesel fuel was achieved. Hydrogen addition increased thermal efficiency up to 32.4%, increased peak in-cylinder pressure up to 40.0%, increased the maximum rate of pressure rise up to 281%, advanced injection timing up to 13.6°, increased NOx emissions up to 224%, and reduced CO 2 emissions up to 47.6%. CO and HC emissions were not significantly affected during dual-fuel operation. At 25% load an operating condition was observed with low NOx and nearly 0 CO2 emissions, which however exhibited unstable combustion.

Indexing (document details)
Advisor: Pieri, Robert V.
Commitee: Pryor, Scott, Selekwa, Majura, Suzen, Yildirim Bora, Ziejewski, Mariusz
School: North Dakota State University
Department: Mechanical Engineering
School Location: United States -- North Dakota
Source: MAI 53/05M(E), Masters Abstracts International
Subjects: Alternative Energy, Mechanical engineering
Keywords: Carbon dioxide, Combustion, Diesel engines, Emissions, Energy, Hydrogen
Publication Number: 1568051
ISBN: 978-1-321-29909-0
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