Waste Energy Driven Air Conditioning System (WEDACS)

Eichhorn, Rhl Ruud; Boot, Michael; Luijten, Ccm Carlo

doi:10.4271/2009-24-0063

Cited by 10 publications

(2 citation statements)

References 5 publications

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“…Waste Energy Driven Air Conditioning System (WEDACS) is an engine load control system that provides electrical energy and cooling power by the energy that is otherwise lost in throttling (see Figure 4). 28,29 This technology patented by the Eindhoven University of Technology replaces the conventional throttle valve with a turbine-generator combination. Throttling losses are reclaimed by expanding the intake charge through a turbine coupling with a generator, which lightens the load of the alternator.…”

Section: Strategies For Optimizing the Gas Exchange Processmentioning

confidence: 99%

Novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines: A review

Akehurst

Brace

2015

International Journal of Engine Research

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Engine downsizing, which is the use of a smaller engine that provides the power of a larger engine, is now considered a mega-trend for the internal combustion engine market. It is usually achieved using one or more boosting devices including a supercharger or a turbocharger. Although supercharging is beneficial for engine's transient response, turbocharging technology is more widely adopted considering its advantages in fuel efficiency. Compared to turbocharged compression ignition engines, turbocharged spark-ignition engines tend to be more challenging with respect to the gas exchange process mainly due to their higher pumping loss, the need for throttling and the fact that spark-ignition engines demand more controllability due to the mitigation of knock, particularly with regard to minimizing trapped residuals. These challenges encourage the entire gas exchange process of turbocharged spark-ignition engines to be regarded as a complete air management system instead of just looking at the boosting system in isolation. In addition, more research emphasis should be focused on novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines because the refinement of the conventional technologies cannot provide continuous gains indefinitely and only innovative concept may improve the engine performance to meet the fuel efficiency target and the more stringent emission regulation in the future. This article will first briefly review knowledge of the current state of the art technologies that are in production as opposed to approaches that are currently only being investigated at a research level. Next, more novel methods of the gas exchange process are introduced to identify the improved synergies between the engine and the boosting machine. The major findings to improve the gas exchange process that emerge from this review comprise four aspects (depending on the location where the novel technologies are implemented) which are as follows: charge air pressurization/de-pressurization improvement, combustion efficiency enhancement within the chamber, valve event-associated development and exhaust system optimization. Although the interaction between these technologies on different aspects of the gas exchange process was found to be highly complex, the optimization or the combination of these technologies is anticipated to further improve a downsized turbocharged spark-ignition engine's performance.

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Section: Strategies For Optimizing the Gas Exchange Processmentioning

confidence: 99%

Novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines: A review

Akehurst

Brace

2015

International Journal of Engine Research

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“…There have been many studies on how to improve efficiency by means of new designs, particularly of the inlet guide vane configuration. Eichhorn et al [4,5] evaluated the efficiency of a variable geometry turbine by means of free space parameter (FSP) theory to improve the efficiency of the turbine. The authors report a 3-28% improvement in efficiency over a range of pressure ratios.…”

Section: Introductionmentioning

confidence: 99%

Experimental optimization of the vanes geometry for a variable geometry turbocharger (VGT) using a Design of Experiment (DoE) approach

Hatami

Cuijpers

Boot

2015

Energy Conversion and Management

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Citation for published version (APA):Cuijpers, M., Boot, M., & Hatami, M. (2015). Experimental optimization of the vanes geometry for a variable geometry turbocharger (VGT) using a Design of Experiment (DoE) Please check the document version of this publication:• A submitted manuscript is the version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement: a b s t r a c tIn this paper, central composite design (CCD) based on Design of Experiment (DoE) is applied to obtain an optimal design of the vane geometry for a variable geometry turbine (VGT). The design is tested at four different pressure ratios (1.25, 1.5, 1.75 and 2.0) on a Garrett GT1541V turbocharger. Seventeen different cases for the inlet guide vanes are proposed. All cases, each having a unique combination of vane height, thickness, length and angle, has been produced via 3D printing. The goal of this study is to ascertain how vane geometry impacts turbine efficiency, so as to arrive at the ideal configuration for this specific turbine for the investigated range of operating conditions. As a main outcome, the results demonstrate that the applied vane angle has the strongest impact on the turbine efficiency, with smaller angles yielding the most favorable results. After CCD analysis, an optimized design for the vanes geometry with 76.31% efficiency (averagely in all pressures) is proposed. As a final step, all cases are analyzed from a free space parameter (FSP) perspective, with the theoretically optimal design (e.g., FSP < 5) corresponding nicely to the best experimental results.

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Convex Modeling and Optimization of a Vehicle Powertrain Equipped With a Generator–Turbine Throttle Unit

Marinkov

Murgovski

Jager

2017

IEEE Trans. Contr. Syst. Technol.

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Waste Energy Driven Air Conditioning System (WEDACS)

Cited by 10 publications

References 5 publications

Novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines: A review

Novel approaches to improve the gas exchange process of downsized turbocharged spark-ignition engines: A review

Experimental optimization of the vanes geometry for a variable geometry turbocharger (VGT) using a Design of Experiment (DoE) approach

Convex Modeling and Optimization of a Vehicle Powertrain Equipped With a Generator–Turbine Throttle Unit

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