Thermo-hydraulic characterization of an automotive intercooler for a low pressure EGR application

Cuevas, Cristian; Makaire, Danielle; Ngendakumana, Philippe

doi:10.1016/j.applthermaleng.2011.04.013

Cited by 18 publications

(6 citation statements)

References 17 publications

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“…In classifications based on pressure, one finds either the high-pressure EGR (HP) or the low-pressure EGR (LP). The LP ERG system is located before the compressor, and the HP EGR cooler is situated before the turbine inlet [5], [7]. The EGR -HP system is sometimes also called Short Route and the LP a Long Route [6].…”

Section: Cooled Egrmentioning

confidence: 99%

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A Study of the Influence of the Intercooled Turbocharger and Cooled EGR on the Performance Parameters of an Ethanol-fueled Engine

Mattos

Gallo

2019

International Journal of Thermodynamics

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The hydrous ethanol combined with the turbocharged engine with Exhaust Gas Recirculation (EGR) was investigated with a phenomenological simulation model. This paper analyzes the influence of the low pressure, high pressure cooled EGR, the intercooler, and the amount of recirculated gases on the performance parameters in a spark-ignited ethanolfueled engine. Using a phenomenological model developed in Matlab ® , the behavior of the pressure and temperature curves is analyzed considering the variation of the crank angle, the formation of NO x , and the tendency for knocking. The fuel analyzed is hydrous ethanol (E95h -5% water by volume), which is widely used in Brazil. The proposed technique showed an increased power using the intercooler (IC) while avoiding knocking. This study showed that the use of a cooled EGR and turbocharged SI results in increased power, while also reducing NO x formation, and preventing or reducing engine knocking. In some engines, the low pressure cooled EGR is better than high pressure, but this can be different for another engine. The model helps to find the best option for each engine modeled.

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Section: Cooled Egrmentioning

confidence: 99%

“…EGR was introduced to vehicles in the 1970s and sought to reduce NO x emissions, as this reduces temperatures in the combustion chamber [5]. The NOx formation mechanism arises from thermal processes, which depend on temperature.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Influence of the Intercooled Turbocharger and Cooled EGR on the Performance Parameters of an Ethanol-fueled Engine

Mattos

Gallo

2019

International Journal of Thermodynamics

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“…Some authors [31][32][33] have studied the phenomena of in-flow condensation, but with other gases (propane or steam) instead of most air. Regarding the condensation in EGR coolers, Warey et al 34 provided a surface condensation model for the EGR cooler, whereas Cuevas et al 35 conducted an experimental campaign on LP-EGR cooler to assess condensation, but in steady conditions.…”

Section: Introductionmentioning

confidence: 99%

Development of an experimental test bench and a psychrometric model for assessing condensation on a low-pressure exhaust gas recirculation cooler

Galindo

Garcia

Tarí

et al. 2020

International Journal of Engine Research

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A test bench has been designed to assess condensation formation produced on the interior of a low-pressure exhaust gas recirculation cooler working with hot stream of humid air representing an engine warm-up stage, when its coolant starts from very cold conditions. An experimental campaign has been conducted with three different exhaust gas recirculation mass flow rates, four exhaust gas recirculation inlet temperatures and three different coolant initial temperatures, covering common conditions found in the low-pressure exhaust gas recirculation system of internal combustion engines under cold starts. The transient experimental results are analyzed and compared with a simple psychrometric condensation model, obtaining a good correlation and reproducing the trends of the condensation, even though an overprediction of the condensates of around 20%–40% exists due to the strong hypotheses assumed. The warm-up tests are most sensitive to the initial coolant temperature. For example, an engine starting at –10 °C ambient temperature could require 10 min to stop producing water in the low-pressure exhaust gas recirculation cooler, with an accumulated quantity during the warm-up of about 100 mL of condensates.

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“…Therefore, combinations of VGT control strategies and EGR have been proposed for engine exhaust gas recovery systems and exhaust emission control. 8–12 Although control systems with advanced procedures and algorithms can accurately control VGT operation, the complexity and cost of such control systems are obvious. A typical VGT costs from 270% to 300% of a fixed geometry turbocharger (FGT) if they have the same size and production volume.…”

Section: Introductionmentioning

confidence: 99%

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes

Wang

Huang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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Variable geometry turbocharging is one of the most significant matching methods between turbocharger and engine, and has been proven to provide air boost for entire engine speed range as well as to reduce turbo-lag. An elastically constrained device designed for a novel variable geometry turbocharger was presented in this paper. The design of the device is based on the nozzle vane’s self-adaptation under interactions of the elastic force by elastically restrained guide vane and the aerodynamic force from flowing gas. The vane rotation mechanism of the novel variable geometry turbocharger is different from regular commercial variable geometry turbocharger systems, which is achieved by an active control system (e.g. actuator). To predict the aerodynamic performance of the novel variable geometry turbocharger, the flow field of the turbine was simulated using transient computational fluid dynamics software combined with a fluid–structure interaction method. The results show that the function of elastically constrained device has similar effectiveness as the traditional variable geometry turbocharger. In addition, the efficiency of the novel variable geometry turbocharger is improved at most operating conditions. Furthermore, a turbocharged diesel engine was created using the AVL BOOST software to evaluate the benefits of the new variable geometry turbocharger. The proposed novel variable geometry turbocharger can effectively improve the engine performance at mid-high speeds, such that the maximum decrease of brake-specific fuel consumption reaches 17.91% under 100% load and 3600 r/min engine condition. However, the engine power and brake-specific fuel consumption decrease significantly at low engine speed conditions, and the decrease is more than 26% under 1000 r/min.

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Thermo-hydraulic characterization of an automotive intercooler for a low pressure EGR application

Cited by 18 publications

References 17 publications

A Study of the Influence of the Intercooled Turbocharger and Cooled EGR on the Performance Parameters of an Ethanol-fueled Engine

A Study of the Influence of the Intercooled Turbocharger and Cooled EGR on the Performance Parameters of an Ethanol-fueled Engine

Development of an experimental test bench and a psychrometric model for assessing condensation on a low-pressure exhaust gas recirculation cooler

A novel variable geometry turbine achieved by elastically restrained nozzle guide vanes

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