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System Dynamics Modeling and Development of a Design Procedure for Short-term Alternative Energy Storage Systems

McDonough, Joshua
http://rave.ohiolink.edu/etdc/view?acc_num=osu1308287500

Abstract Details

2011, Master of Science, Ohio State University, Mechanical Engineering.
Recovering and storing a vehicle’s kinetic energy during deceleration and the subsequent use of the stored energy during acceleration has lead to significant increases in vehicle efficiency. Current production hybrid electric vehicles (HEVs) convert the energy and store it using electric machines and electro-chemical batteries. While these systems can be configured to provide substantial benefits in addition to kinetic energy recovery, significant limitations exist which hinder the performance and market penetration. Converting mechanical energy to electricity then storing it chemically leads to considerable losses during storage. The path must be followed in the opposite direction during release, compounding the losses. Current HEV batteries, while very effective at storing large quantities of energy, have longevity driven power limitations which drive up cost and weight. As a result of these limitations, investigations have been made into alternative means to recover and store kinetic energy on board vehicles. This thesis investigates two such methods of energy recovery and storage, a hydraulic system with accumulator energy storage and a purely mechanical system with flywheel energy storage. Both systems are of parallel hybrid architecture and offer high power capacity at relatively low cost. The hydraulic system consists of a pump/motor to convert mechanical work to fluid power and a high-pressure accumulator to store the energy. The mechanical system transmits the vehicle’s kinetic energy to a flywheel through changing the ratio of a continuously variable transmission linked between the flywheel and the drivetrain. System dynamics models are created for each of the systems’ components and coupled to allow for analysis over simulated drive cycles. An iterative design method is proposed for both the hydraulic and mechanical systems, based on drive cycle analysis, performance in simulation, and system properties, such as mass and estimated cost. The systems are compared and contrasted with each other in order to evaluate the relative strengths and weaknesses of the various kinetic energy recovery methods.
Marcello Canova, PhD (Advisor)
Yann Guezennec, PhD (Committee Member)
228 p.
Automotive Engineering; Mechanical Engineering
hybrid; energy storage; hydraulic; flywheel; system dynamics;

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Citations

  • McDonough, J. (2011). System Dynamics Modeling and Development of a Design Procedure for Short-term Alternative Energy Storage Systems [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1308287500

    APA Style (7th edition)

  • McDonough, Joshua. System Dynamics Modeling and Development of a Design Procedure for Short-term Alternative Energy Storage Systems. 2011. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1308287500.

    MLA Style (8th edition)

  • McDonough, Joshua. "System Dynamics Modeling and Development of a Design Procedure for Short-term Alternative Energy Storage Systems." Master's thesis, Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1308287500

    Chicago Manual of Style (17th edition)

osu1308287500
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© 2011, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.