What price of speed? A critical revision through constructal optimization of transport modes

Trancossi, Michele

doi:10.1007/s40095-015-0160-6

Cited by 33 publications

(25 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The power equation found in traditional bibliography, which have been cited in the preceding paragraph, can be improved by a more accurate analysis according to EMIPS (Exergetic Material Input per Unit of Service) [11] as corrected by Trancossi [12,13].…”

Section: Energetic Analysis and Dimensioningmentioning

confidence: 99%

See 1 more Smart Citation

Energetic design of a new autogyro aircraft with cyclorotors with possibility of energy harvesting

Ejaz¹,

Good²,

Sharma³

et al. 2017

IJHT

Self Cite

View full text Add to dashboard Cite

Autogyros are important for their maneuverability and operative flexibility. This paper defines a new autogyro configuration based on cyclorotors placed on the side of the cabin, near the centre of gravity of the aircraft, and a pushing propeller with horizontal axis. The used cyclorotor has an innovative high lift-resistive configuration that can maximize vertical lift, vertical propulsion and energy harvesting. The resulting aircraft has really breakthrough features. It can produce different configurations such as VTOL operation by using the cyclorotors for propulsion by mean electric motors, cogeneration during flight because of the autorotation of the cyclorotors and onboard energy harvesting by the reciprocal use of the motors as generators, fixed wing flight such as an old multi-wing aircraft of the pioneering era of aeronautics. The preliminary design process by the fundamental laws of basic physics is presented. An effective optimization of energetic equation of the resulting aircraft has been produced according to a second principle analysis of a theoretical model of the aircraft. The adopted method has been EMIPS that considers the resources required to move vehicle and payload to focus the analysis on the energetic inefficiencies at vehicle level.

show abstract

Section: Energetic Analysis and Dimensioningmentioning

confidence: 99%

“…Energy analysis has been performed according to the general flight mechanics equations of an aircraft by Hull [12] as corrected by Trancossi [13]. …”

Section: Energetic Analysis and Dimensioningmentioning

confidence: 99%

Energetic design of a new autogyro aircraft with cyclorotors with possibility of energy harvesting

Ejaz¹,

Good²,

Sharma³

et al. 2017

IJHT

Self Cite

View full text Add to dashboard Cite

show abstract

“…The design method is derived from the optimization of the equations of motions such as in Trancossi et al [18]. This method is an improvement of second principle analysis [19] according to the EMIPS method [20] as adapted by Trancossi [21,22]. It is then a method defined on the flight mechanics equations and energy equations of the system, to define a preliminary optimal configuration that can be then designed and tested.…”

Section: Definition Of the Propulsion System For A Spherical Objectmentioning

confidence: 99%

Control, Propulsion and Energy Assessment of a Spherical UAS for Low Speed Operations

Bandycki

Trancossi

Páscoa

2017

SAE Technical Paper Series

Self Cite

View full text Add to dashboard Cite

This paper presents a comparison between different hypotheses of propulsion of a spherical UAS. Different architectures have been analyzed assessing their specific aerodynamic, energetic, and flight mechanics features. The comparison has been performed assuming the robustness of flight control in different wind conditions, defining for each the specific operative ranges, mission profiles, and energy assessment. An effective energy assessment and comparison against a commercial UAS has been produced. Even if the paper considers a preliminary simplified configuration, it demonstrates clearly to be competitive against traditional quadcopters in a predefined reference mission.

show abstract

“…Trancossi [9] has also compared different methods for evaluating the overall Life Cycle Assessment of the impacts of different transport modes. Dewulf and Van Langenhove [10] have defined an innovative exergetic analysis based on an effective analysis of the productivity of the resources. They extend the basic concept of MIPS (Material Input Per Unit of Service) in terms of the second law of thermodynamics.…”

Section: Energetic Analysis Of a Vehiclementioning

confidence: 99%

Design of an innovative off road hybrid vehicle by energy efficiency criteria

Trancossi¹,

Páscoa²,

Xisto³

2016

IJHT

Self Cite

View full text Add to dashboard Cite

The environmental impact of road transport is significant because it is a major user of energy and the major user of the world's petroleum that is extracted every year. This creates air pollution, including nitrous oxides and particulates, and is a significant contributor to global warming through emission of carbon dioxide, for which transport is the fastest-growing emission sector. These impacts assume a particular importance if considered the place where they are emitted such as the cities and highways that develop near the human settlements. By subsector, road transport can globally be considered the largest contributor to global warming. This paper takes into account an effective design methodology, which is based on an effective energy optimization of the vehicle and its main components. This method takes inspiration from constructal law, even if it could not be limited to this. The inspiration is limited to considering the fluxes of different physical magnitudes inside a complex system, such as a vehicle is, and analyzing how they develop and how they develop and mix. This analysis leads to a general analysis to the vehicle and to an effective optimization based on energy principle by a step by step optimization that allows identifying the critical elements that limit the flow of the different magnitudes inside the system, with particular attention to the factor that limits energy efficiency at different scale levels. The components have been considered only if they are industrial grade and inside a modular design, which allows merging design, finalized to energy efficiency, minimization of exergy disruption and of LCA impacts. The emotion that has been caused by the end of the production of the most successful British vehicle that is Land Rover Defender has stimulated to produce a sample design of a vehicle in this class producing different alternatives for different uses. The case of a vehicle that can compete with Discovery in terms of use and specifications has been considered, Results have been surprising demonstrating that the use of industrial grade components and their accurate choice will allow defining new vehicle platforms that can radically improve energy efficiency of vehicles.

show abstract

What price of speed? A critical revision through constructal optimization of transport modes

Cited by 33 publications

References 22 publications

Energetic design of a new autogyro aircraft with cyclorotors with possibility of energy harvesting

Energetic design of a new autogyro aircraft with cyclorotors with possibility of energy harvesting

Control, Propulsion and Energy Assessment of a Spherical UAS for Low Speed Operations

Design of an innovative off road hybrid vehicle by energy efficiency criteria

Contact Info

Product

Resources

About