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Thesis (Ph. D.)--Michigan State University. Dept. of Electrical and Computer Engineering, 2006. / Title from PDF t.p. (viewed on Nov. 17, 2008) Includes bibliographical references (p. 168-175). Also issued in print.

The ‘Hydrogen Economy’ is a proposed system where hydrogen is produced from carbon dioxide free energy sources and is used as an alternative transportation fuel. The application of hydrogen on board fuel cell vehicles can significantly decrease air pollutants and greenhouse gases emission from the transportation sector. There must be significant transition of infrastructure in order to achieve the hydrogen economy with the investment required in both production and distribution infrastructure. This research focused on the projected demands for infrastructure transition of ‘Hydrogen Economy’ in Ontario, Canada. Three potential hydrogen demand and distribution system development scenarios were examined to estimate hydrogen fuel cell vehicle market penetration, as well as the associated hydrogen production and distribution. Demand of transportation hydrogen was estimated based on the type of hydrogen fuel cell vehicle. Upon the estimate of hydrogen demand from fuel cell vehicles in Ontario, the resulting costs of delivered hydrogen were investigated. In the longer term hydrogen is expected to be produced by utilizing nuclear heat and a thermochemical production cycle. A brief survey of thermochemical hydrogen production cycles was presented with a focus on S-I cycle. Sequential optimization models were developed to explore the minimum utility energy consumption and the minimum number of heat exchangers. Finally an optimal heat exchanger network for S-I thermochemical cycle was defined by a mixed integer optimization model using GAMS.

The ‘Hydrogen Economy’ is a proposed system where hydrogen is produced from carbon dioxide free energy sources and is used as an alternative transportation fuel. The application of hydrogen on board fuel cell vehicles can significantly decrease air pollutants and greenhouse gases emission from the transportation sector. There must be significant transition of infrastructure in order to achieve the hydrogen economy with the investment required in both production and distribution infrastructure. This research focused on the projected demands for infrastructure transition of ‘Hydrogen Economy’ in Ontario, Canada. Three potential hydrogen demand and distribution system development scenarios were examined to estimate hydrogen fuel cell vehicle market penetration, as well as the associated hydrogen production and distribution. Demand of transportation hydrogen was estimated based on the type of hydrogen fuel cell vehicle. Upon the estimate of hydrogen demand from fuel cell vehicles in Ontario, the resulting costs of delivered hydrogen were investigated. In the longer term hydrogen is expected to be produced by utilizing nuclear heat and a thermochemical production cycle. A brief survey of thermochemical hydrogen production cycles was presented with a focus on S-I cycle. Sequential optimization models were developed to explore the minimum utility energy consumption and the minimum number of heat exchangers. Finally an optimal heat exchanger network for S-I thermochemical cycle was defined by a mixed integer optimization model using GAMS.

Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains vi, 86 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 82-84).

The fuel economy of Fuel Cell Vehicles (FCVs) is affected by various factors such as the fuel cell efficiency, the regenerative energy capturing, the power control strategy, the vehicle driving patterns, the degree of hybridization between fuel cells and energy storage systems, and so on. In this thesis, a new power control strategy is proposed to improve fuel economy for hybrid FCVs considering the fuel cell efficiency and battery energy management. In order to show the power flows due to the proposed power control strategy and analyze the fuel economy, an overall vehicle simulation for three types of FCVs is implemented. The results show that the fuel economy can be improved by operating the fuel cell system within the specified high efficiency region and managing the state of charge (SOC) of the battery for absorbing regeneration energy effectively.

Thesis (M.S.)--University of Delaware, 2008. / Principal faculty advisors: Ajay K. Prasad and Suresh G. Advani, Dept. of Mechanical Engineering. Includes bibliographical references.

Thesis (M.S.)--Rochester Institute of Technology, 2009. / Typescript. Includes bibliographical references (p. 93-95).

Typescript. Includes vita and abstract. Includes bibliographical references (leaves 85-91). Also available online in Scholars' Bank.

This report is the result of a master’s thesis project which covers the cooling system in Volvo Cars’ fuel cell test vehicle. The purpose is to investigate if the existing cooling system in the fuel cell test vehicle works with the current fuel cell system of the vehicle, in terms of sufficient heat rejection and thus sustaining acceptable temperature levels for the fuel cell system. The project also aims to investigate if it is possible to implement a more powerful fuel cell system in the vehicle and keep the existing cooling system, with only a few necessary modifications. If improvements in the cooling system are needed, the goal is to suggest improvements on how a suitable cooling system can be accomplished. This was carried out by modeling the cooling system in the simulation software GT-Suite. Then both steady state and transient simulations were performed. It was found that the cooling system is capable of providing sufficient heat rejection for the current fuel cell system, even at demanding driving conditions up to ambient temperatures of at least 45°C. Further, for the more powerful fuel cell system the cooling system can only sustain sufficient heat rejection for less demanding driving conditions, hence it was concluded that improvements were needed. The following improvements are suggested: Increase air mass flow rate through the radiator, increase pump performance and remove the heat exchanger in the cooling system. If these improvements were combined it was found that the cooling system could sustain sufficient heat rejection, for the more powerful fuel cell system, up to the ambient temperature of 32°C.