Energy Converters for the PNGV Vehicle

Belaire, Richard C.; Lawrie, Robert E.; Skellenger, G. D.

doi:10.4271/972677

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…The automotive industry has periodically considered Stirling cycle engines for transportation, but for a variety of reasons, most notably low power to weight ratio and no clear regulated emissions advantage over existing technology, the Stirling cycle has yet to appear in a configuration acceptable to the automotive industry (Amann, 1999;Belaire et al, 1997;Wilson, 1978). The unavoidable operational characteristic of a delay during start-up to heat the machine from ambient to operating temperature would most likely be unacceptable to consumers.…”

Section: Stirling Cyclementioning

confidence: 99%

Comparison of Prime Movers Suitable for USMC Expeditionary Power Sources

Theiss¹,

Conklin²,

Thomas³

et al. 2000

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This report documents the results of the ORNL investigation into prime movers that would be desirable for the construction of a power system suitable for the United States Marine Corps (USMC) expeditionary forces under Operational Maneuvers From The Sea (OMFTS) doctrine. Discrete power levels of ~1, 5, 15, and 30 kW are considered. The only requirement is that the prime mover consumes diesel fuel. A brief description is given for the prime movers to describe their basic scientific foundations and relative advantages and disadvantages. A list of key attributes developed by ORNL has been weighted by the USMC to indicate the level of importance. A total of 14 different prime movers were scored by ORNL personnel in four size ranges (1,5, 15, & 30 kW) for their relative strength in each attribute area. The resulting weighted analysis was used to indicate which prime movers are likely to be suitable for USMC needs. No single engine or prime mover emerged as the clear-cut favorite but several engines scored as well or better than the diesel engine. At the higher load levels (15 & 30 kW), the results indicate that the open Brayton (gas turbine) is a relatively mature technology and likely a suitable choice to meet USMC needs. At the lower power levels, the situation is more difficult and the market alone is not likely to provide an optimum solution in the time frame desired (2010). Several prime movers should be considered for future developments and may be satisfactory; specifically, the Atkinson cycle, the open Brayton cycle (gas turbine), the 2-stroke diesel. The rotary diesel and the solid oxide fuel cell should be backup candidates. Of all these prime movers, the Atkinson cycle may well be the most suitable for this application but is an immature technology. Additional demonstrations of this engine will be conducted at ORNL. If this analysis is positive, then the performance of a generator set using this engine, the open Brayton and the 2-stroke diesel should be estimated to evaluate its potential suitability for expeditionary forces. The overriding conclusion of this effort is that we feel a suitable prime mover can be found but that the development will be technically challenging and trade-offs will be made before an optimum solution is found. Comments: Technology is unacceptable for application of interest and too heavy for combined cycle applications. Extent of development expected in 5-10 years: Development for space power and selfpowered water heaters, stoves and furnaces. References Webpages for TPV research performed at the Vehicle Research Institute at Western Washington University: http://vri.etec.wwu.edu/tpv.htm. A number of research papers concerning TPV are available and are informative.

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Section: Stirling Cyclementioning

confidence: 99%

Comparison of Prime Movers Suitable for USMC Expeditionary Power Sources

Theiss¹,

Conklin²,

Thomas³

et al. 2000

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“…While there is a significant body of work related to hybrid passenger cars and small commercial trucks (Aceves and Smith 1995;Belaire, et al, 1997;Duoba, et al, 1996;An and Barth, 1998;Hewko and Weber;and Kosowski and Desai, 2000), as well as specialised vehicles, such as city buses (Marr, et al, 1993;Heidelberg and Reiner, 1989;and Van den Bossche, 1999), there are many open issues related to hybridisation of medium and heavy trucks for both on-and off-road use. Adequate sizing of components, assessment of mobility and handling-related constraints, realistic duty cycles, and strategies for coordinating the primary and assistant power sources, are just a few of the questions that require answers tailored to a specific truck category.…”

mentioning

confidence: 99%

Combined optimisation of design and power management of the hydraulic hybrid propulsion system for the 6 ? 6 medium truck

Filipi¹,

Louca²,

Daran³

et al. 2004

IJHVS

123

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Hybrid propulsion systems are one of the critical technologies on the roadmap to future ultra-efficient trucks. While there is a significant body of work related to hybrid passenger cars and light commercial trucks, there are many open issues related to hybridisation of heavier trucks intended for both on-and off-road use. This work addresses those questions through a systematic analysis of the proposed parallel hydraulic hybrid powertrain for the Family of Medium Tactical Vehicles (FMTV). A representative duty cycle for the FMTV is generated based on information about the typical vehicle mission. A methodology for sequential optimisation of hybrid propulsion and power management systems is applied to a hydraulic hybrid configuration with posttransmission motor location. This analysis is critical in evaluating the fuel economy and mobility potential of the hybrid propulsion system, as well as enhancing our understanding of the phenomena leading to predicted fuel economy values.

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New approach for performing failure analysis of fuel cell-powered vehicles

Motevalli

Mohd

2009

Int.J Automot. Technol.

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Energy Converters for the PNGV Vehicle

Cited by 4 publications

References 1 publication

Comparison of Prime Movers Suitable for USMC Expeditionary Power Sources

Comparison of Prime Movers Suitable for USMC Expeditionary Power Sources

Combined optimisation of design and power management of the hydraulic hybrid propulsion system for the 6 ? 6 medium truck

New approach for performing failure analysis of fuel cell-powered vehicles

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