Date of Award
Master of Science
Mechanical and Aerospace Engineering
Dr. Claudia Fajardo
Dr. Bade Shrestha
Dr. Christopher Cho
Masters Thesis-Open Access
The second law of thermodynamics is a powerful tool for calculating the amount of energy that can be converted to work (i.e., the exergy or availability of a system), which cannot be predicted using the first law. The objectives of this research project are to quantify the availability during the compression, combustion and expansion processes of a spark-ignited engine fueled with methane; and to highlight differences in the thermo-mechanical availability of the ideal and spark-ignition (SI) engine cycles. A cooperative single-cylinder research engine was used to measure the data required for availability analysis at equivalence ratios ranging between 0.83 and 1.25. The thermo-mechanical availability, normalized by the energy content of the mixture, was found to increase as the equivalence ratio decreases. First and second-law of Thermodynamics efficiencies also increased for fuel-leaner mixtures, but remained within four percent of each other for methane in both the ideal and the SI engine cycles.
Abotabik, Muataz, "Second Law of Thermodynamics Analysis of an Internal Combustion Engine Fueled with Methane" (2016). Master's Theses. 724.