Design of a heat exchanger to reduce the exhaust temperature in a spark-ignition engine

Lee, Seok-Hwan; Bae, Choongsik

doi:10.1016/j.ijthermalsci.2007.03.011

Cited by 27 publications

(10 citation statements)

References 14 publications

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“…In the second step, authors aim to enhance the exergy and waste heat recovery using fins. According to Lee and Bae [12] study, for more effective heat transfer, fins should be place in the exhaust gases pass.…”

Section: Resultsmentioning

confidence: 99%

“…Pandiyarajan et al [11] designed a finned-tube heat exchanger and they used a thermal energy storage using cylindrical phase change material (PCM) capsules and found that nearly 10-15 % of fuel power is stored as heat in the combined storage system in different loads. In another experimental work, Lee and Bae [12] designed a little heat exchanger with fins in the exhaust by design of experiment (DOE) technique. They reported that fins should be in the exhaust gases passage for more heat transfer and designed 18 cases in different fin numbers and thicknesses and found the most effective case among them.…”

Section: Introductionmentioning

confidence: 99%

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Investigations of fin geometry on heat exchanger performance by simulation and optimization methods for diesel exhaust application

Hatami

Ganji

Gorji-Bandpy

2015

Neural Comput & Applic

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In this paper, three cases of heat exchangers (HEXs) in the exhaust of a diesel engine are modeled numerically for improving the exergy recovery amount. Simple double pipes, longitudinal and circular finned-tube HEXs are modeled to study the fin effect in waste heat recovery amount. It is tried to compare the circular and longitudinal fin's effect (with the same surface area) on exergy recovery and pressure drop in the exhaust. As a main outcome, results show that circular fins cannot enhance exergy recovery due to trapping the gases between them and producing a high pressure drop compared to longitudinal fins. Also, L 16 Taguchi array is applied to find the most important parameters in longitudinal fins to find the optimum design for this heat exchanger. Finally, a multi-objective optimization by central composite design is applied to find the optimum dimensions of proposed HEX in different engine loads.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigations of fin geometry on heat exchanger performance by simulation and optimization methods for diesel exhaust application

Hatami

Ganji

Gorji-Bandpy

2015

Neural Comput & Applic

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“…DoE is a collection of mathematical and statistical techniques to reduce the number of experiments in order to find the effect of parameters affecting a response in a process, thereby aiming for a reduction in both costs and time [16][17][18][19][20]. Generally, the structure of the relationship between the response and the independent variables is unknown.…”

Section: Design Of Experiments (Doe) and Central Composite Design (Ccd)mentioning

confidence: 99%

“…If the distance from the center of the design space to a factorial point is ±1 unit for each factor, the distance from the center of the design space to a star point is ±a for |a| > 1. The precise value of a depends on certain properties, the design and the number of factors involved [16][17][18][19][20].…”

Section: Design Of Experiments (Doe) and Central Composite Design (Ccd)mentioning

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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“…On the base of the reviewed articles [5][6][7][8][9][10][11][12][13] the tube heat exchangers were most commonly used. The efficiency varied from 24 % to 76 % depending on the design and operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on Rankine cycle evaporator efficiency intended for exhaust waste heat recovery of a diesel engine

et al. 2017

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Abstract. The paper pressents an experimental study of Rankine cycle evaporator efficiency. Water was chosen as the working fluid in the system. The experimental test was conducted on a test bench equipped with a burner charged by compressed fresh air. Generated exhaust gases parameters were previously determined over the diesel engine operating range (28 engine operating points were studied). For each test point the working fluid parameters (flow rate and evaporating pressure) were varied. Thus, the enthalpy flow through the heat exchanger was determined. Heat exchanger was designed as 23 helical tubes are inserted. On the basis of the results, it was found out that efficiency varies from 25 % to 51,9 %. The optimal working fluid pressure is 20 bar at most of the operating points while the optimum fluid mass flow rate varies from 2 g/s to 10 g/s.

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Design of a heat exchanger to reduce the exhaust temperature in a spark-ignition engine

Cited by 27 publications

References 14 publications

Investigations of fin geometry on heat exchanger performance by simulation and optimization methods for diesel exhaust application

Investigations of fin geometry on heat exchanger performance by simulation and optimization methods for diesel exhaust application

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

Experimental study on Rankine cycle evaporator efficiency intended for exhaust waste heat recovery of a diesel engine

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