A Gas Turbine-Based Hybrid Vehicle—Part II: Technological and Configuration Issues

Capata, Roberto; Cioffarelli, E.; Sciubba, Enrico

doi:10.1115/1.1584475

Cited by 10 publications

(24 citation statements)

References 6 publications

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“…By returning to all the analyses carried out in this article, we can summarise everything in the Table 20, which shows the consumption and emissions of Lethe™ hybridised vehicle according to the described procedure. The table contains data obtained by previous simulations and various assumptions and calculations made [1][2][3][4][5]. It notes a consumption reduction of about 30%, for a hybrid city car powered by methane compared to current commercial production vehicles.…”

Section: Discussionmentioning

confidence: 99%

“…The frame was rebuilt, once its structure [10] and dimensions [11] were known, using the SOLID EDGE @ programme and it was used to check the size of the components for our chosen configurations. Of these configurations, a version with a traditional motor (LETHE © City Car or LETHE © Sedan [1][2][3][4][5]) which power the front wheels (another configuration, named "packaged" was also studied, with a motor-wheel directly housed in the rear wheels) will be shown. When positioning the rotating parts, the respective gyroscopic movements were considered, although they generally appear to be less important than the one generated by the wheels.…”

Section: Component Distributionmentioning

confidence: 99%

“…In the vehicle hybridisation process, once the initial calculations have been completed, as indicated in previous works [1][2][3][4][5], each component to make any vehicle a Low Emission Turbo Hybrid Electric Vehicle (Lethe © ) vehicle is then studied separately.…”

Section: How To Hybridize a Vehiclementioning

confidence: 99%

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A Proposal for CO2 Abatement in Urban Areas: The UDR1–Lethe© Turbo-Hybrid Vehicle

2011

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Abstract:For years the interest of the University of Roma 1 (UDR1) research group has been focused on the development of a Hybrid Series vehicle (called Lethe © ), different from standard ones, thanks to the use of a Gas Turbine (GT) set as a thermal engine. The reason for this choice resides in the opportunity to reduce weight and dimensions, in comparison to a traditional Internal Combustion Engine. It's currently not possible to use the GT engine set directly for the vehicle traction, so the UDR1 HS configuration only shows the GT set connected with the electric generator. The result is that the traction is purely electric. The resulting engine configuration is commonly described as a Hybrid Series Plug In. Several previous studies have been carried out, and this research has allowed us to define the correct ratio (Degree of Hybridization) between the installed power of the battery pack and that of the GT electric generator which simultaneously guarantee the main life for the battery package and the capacity of the vehicle to complete a common mission without lack of energy or stopping. This article reports the final step of the research: once all data has been calculated, how to "hybridize" a commercial city car, passenger sedan or any other vehicle.Keywords: hybrid series vehicles; gas turbine set; component design and choice

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Section: Discussionmentioning

confidence: 99%

Section: Component Distributionmentioning

confidence: 99%

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A Proposal for CO2 Abatement in Urban Areas: The UDR1–Lethe© Turbo-Hybrid Vehicle

2011

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“…To find the correct HD we have adopted a method based on an energy balance evaluation [1][2][3][4]. To perform a driving mission, any vehicle needs an energy supply; in a traditional ICE vehicle this energy is guaranteed by the thermal unit that delivers, instant by instant, the power for the traction.…”

Section: Design Procedure Optimal Configurationmentioning

confidence: 99%

“…The advantage of the series configuration is higher fuel mileage and lower emissions, due to the possibility of limiting the operation of the internal combustion engine to its peak efficiency range and to the reduced engine weight. The UDR1 Research group at the Department of Mechanical & Aeronautical Engineering of the University of Rome "Sapienza" proposes a new concept of hybrid vehicle [1][2][3][4][5], in which the thermal engine is a suitable optimized gas turbine set. This paper reports our proposed general procedure for the preliminary design and sizing of an HS engine applied to the hybridization of a seven ton city bus.…”

Section: Introductionmentioning

confidence: 99%

Procedure for the Design of a Hybrid-Series Vehicle and the Hybridization Degree Choice

Capata

Coccia

2010

Energies

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Abstract. For years, the interest of the UDR1 research group has focused on the development of a Hybrid Series (HS) vehicle, different from the standard one thanks to the use of a Gas Turbine set (GT) as a thermal engine. The reason for this choice resides in the opportunity to reduce weight and dimensions, in comparison to a traditional Internal Combustion Engine (ICE). It is not possible to use the GT engine set directly for the vehicle traction, therefore the UDR1 HS configuration shows the GT set connected with the electric generator only. The result is that the traction is purely electric. The resulting engine configuration is a commonly defined Hybrid Series. Many efforts are spent in the definition of a generic scientific method to define the correct ratio (Degree of Hybridization) between the installed power of the battery pack and that of the GT electric generator, which simultaneously guarantees the life of the battery pack and the capacity of the vehicle to complete a common mission without lack of energy or stopping. This article reports a method to define the power ratio between battery pack and GT generator, applied to a recent commission for the development of a mini city bus.

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The concept of the gas turbine-based hybrid vehicle: system, design and configuration issues

Capata

Sciubba

2006

Int. J. Energy Res.

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SUMMARYThe object of this study is a theoretical and experimental analysis of a new hybrid propulsion system for a passenger sedan in which the thermal engine is a small gas turbine set. Some preliminary results on the possibility of replacing the conventional ICE of a hybrid 'series' configuration by a turbogas were presented and discussed in previous papers by the same authors: several possible designs were examined under both a thermodynamic and an operative point of view. This paper presents a summary of the project and constitutes an attempt to put things in a proper engineering perspective: the technical feasibility of the project is assessed via a calculation of the required mission loads, a preliminary design of the most important elements of the propulsive system, the choice of the mission control strategy and the implementation of a numerical system simulator. The experiments that provided a verification for the assumed component efficiencies were carried out, in cooperation with the Research Centre of ENEACasaccia, on an ELLIOTT TA-45 group. Our results, though only preliminary, allow for a direct comparison between a GT-hybrid vehicle and a modern diesel car, and indicate that the GT-hybrid may be actually a competitor for the FC-powered vehicle concept. Our 'optimal' configuration is a combination of a 100 kg battery pack and two turbogas set of 5 and 16 kW, respectively.

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A Gas Turbine-Based Hybrid Vehicle—Part II: Technological and Configuration Issues

Cited by 10 publications

References 6 publications

A Proposal for CO2 Abatement in Urban Areas: The UDR1–Lethe© Turbo-Hybrid Vehicle

A Proposal for CO2 Abatement in Urban Areas: The UDR1–Lethe© Turbo-Hybrid Vehicle

Procedure for the Design of a Hybrid-Series Vehicle and the Hybridization Degree Choice

The concept of the gas turbine-based hybrid vehicle: system, design and configuration issues

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