Project Director

Elliott, Trevor S.

Department Examiner

Margraves, Charles H.; McDonald, Gary

Department

Dept. of Mechanical Engineering

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

Alternative fuel internal combustion engines (ICEs) have been increasing in popularity as the harmful effects of pollution and the need for a sustainable energy source are becoming more apparent. Two alternative fuels, E85 and hydrogen gas, are considered in this study. These fuels are renewable and have less emissions than traditional fuels, but there are many inherent disadvantages to their use. Water injection could alleviate some of the issues that plague these fuels. To test this, a Briggs and Stratton Baja engine was used, with and without water injection. Gasoline with water injection showed better performance than without: the power with water injection was 10.26 hp while the power without injection was 10.35 hp. Further tests with E85 were planned, but due to equipment malfunctions, these tests could not be performed. Instead of experimental test results, theoretical curves for E85 were found. E85 had a performance that was 80% of gasoline’s. Adding water injection increased E85’s performance to 92% of gasoline’s performance. These results show that water injection is capable of increasing engine performance. It is possible that the benefits of water injection could also apply to hydrogen fuel. Implementation of water injection in a hydrogen fuel ICE would alleviate some of the issues that are inherent in these systems, allowing for improvements in design and operation. Water injection could increase the viability of alternative fuel ICEs.

Degree

B. S.; An honors thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Bachelor of Science.

Date

5-2018

Subject

Internal combustion engines -- Combustion -- Simulation method.

Keyword

Engineering; Combustion; Engine; Water injection; Alternative fuel

Discipline

Mechanical Engineering

Document Type

Theses

Extent

25 leaves

Language

English

Rights

Under copyright.

License

http://creativecommons.org/licenses/by-nc-nd/3.0/

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