A Review of Novel Turbocharger Concepts for Enhancements in Energy Efficiency

Kusztelan, Alex; Yao, Yufeng; Marchant, Danis; Wang, Yawei

doi:10.5383/ijtee.02.02.003

Cited by 18 publications

(10 citation statements)

References 16 publications

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“…When the torque demand rapidly increases at the crankshaft's low rotational speed, the insufficient turbine fuelling prevents the compressor from supplying sufficient air quantity to meet the condition related to the excess air ratio λ=1. The delay in the powertrain's reaction to the driving force demand and as well as the phenomenon of a gas connection in the intake manifold for the turbocharger system is the subject of research of many scientists like Bozzas [1], Hawary [6], Kusztelan [10], Mysłowski [19], Nithesh [21], Sivaraman [24], Szengel [20], Turner [25], Voser [26], and Williams [28]. Despite the flaw, this solution is most often used by engine manufacturers.…”

Section: Short-term Compressed Air Supercharging System Upstream Of the Turbocharger Assemblymentioning

confidence: 99%

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

Mamala¹,

Prażnowski²,

Kołodziej³

et al. 2021

IJAME

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The powertrain is a very important subassembly in a car and is responsible not only for the automotive industry’s impact on the environment but also for the safety of people travelling by car and performing overtaking manoeuvres and joining traffic. In general, the powertrain is a combination of the drive unit and drive transmission, wherein the drive unit is responsible for the available driving force in the car’s wheels and for the car’s ability to accelerate when the throttle pedal is rapidly pressed at a constant gearbox ratio. The availability of the driving force reserve in the powertrain is the most important issue for the reason of safety of the people travelling by car. In the case of drive unit what they are of the combustion engines, the rapid pressing of the throttle pedal in the car acceleration process leads to a temporary deficiency in the driving force and in the powertrain’s output. The deficiency in the driving force has a negative impact on acceleration and driving comfort. In this paper, the authors assessed and analysed two different short-term compressed air supercharging systems for combustion engines with air supplied from a high-pressure tank. The analysis covered the response of the combustion engine with spark ignition to the gradual increase in pressure in the air-intake system. The assumption is that the applied short-term compressed air supercharging system could improve the driving force during the phase of the engine’s increasing crankshaft rotational speed. This helps to achieve the improved passenger car acceleration dynamics, depending on the supercharging method and throttle pedal exertion. When analysing the car’s acceleration dynamics, expressed by the shorter time of increasing the longitudinal speed from initial to final, it was possible to shorten the acceleration time. It is also possible to observe an improved driving force behaviour, especially during the first phase of acceleration.

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Section: Short-term Compressed Air Supercharging System Upstream Of the Turbocharger Assemblymentioning

confidence: 99%

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

Mamala¹,

Prażnowski²,

Kołodziej³

et al. 2021

IJAME

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“…The compressor increases the intake air pressure and thereby the combustion pressure. The purpose of turbo charger is to improve the volumetric efficiency [46]. The arrangement of a typical turbocharger is shown in Figure 4.…”

Section: Super Charging or Turbo Chargingmentioning

confidence: 99%

Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2016

Int. J. Automot. Mech. Eng.

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Compression ignition (CI) engines are used in heavy duty engine applications due to their high torque capability and thermal efficiency. However, high NOx and smoke emissions are the challenges in using CI engines. Homogeneous charge compression ignition (HCCI) is one of the best methods to reduce NOx and smoke emissions. However, controlling the combustion for an entire range of operation in HCCI mode is a challenging task. Different methods like fast thermal management (FTM), exhaust gas recirculation (EGR), turbo charging and reactivity controlled compression ignition (RCCI) are reviewed and discussed in this article. RCCI is similar to HCCI, which uses reactivities of two different fuels to control combustion. The combustion objectives of HCCI such as less NOx and soot emission can also be obtained through this method. Combustion control based on reactivities of various fuels (RCCI) is discussed significantly. Fuels that have different reactivities can help to control the combustion phasing and thereby reducing the emission. Two different fuels can be injected together into the manifold or one fuel can be injected in the port and other in the combustion chamber directly for reactivity based combustion control. The technological development in different combustion control methods is reviewed and discussed in this article which is a useful knowledge base for further research investigations. When compared to other combustion control methods, RCCI is found to be advantageous in all perspectives such as cost, flexibility in control, simplicity and wide range of operation.

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“…Turbochargers are widely used in internal combustion reciprocating engines, as they increase power thanks to the compression effect, allowing a greater mass of air to flow into the cylinder whilst recovering a proportion of the exhaust gas energy [31,32]. Since cylinder capacity is increased, keeping size constant, this action is known as downsizing [33]. The basis of turbocharging is to increase engine power by introducing a greater amount of air and fuel into the cylinders, as the air-fuel ratio is restricted to a very narrow range to achieve complete combustion.…”

Section: Introductionmentioning

confidence: 99%

Energy Balance of Turbocharged Engines Operating in a WWTP with Thermal Hydrolysis. Co-Digestion Provides the Full Plant Energy Demand

et al. 2021

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The energy balance of lean-burn turbocharged engines using biogas as fuel is reported. Digestion data were obtained from the wastewater treatment plant (WWTP) of the city of Burgos (Spain), operating with a thermal hydrolysis unit for sludge pre-treatment. Operational performance of the plant was studied by considering the treatment of sludge as a comparative base for analyzing global plant performance if co-digestion is implemented for increasing biogas production. The calculation methodology was based on equations derived from the engine efficiency parameters provided by the manufacturer. Results from real data engine performance when evaluated in isolation as a unique control volume, reported an electrical efficiency of 38.2% and a thermal efficiency of 49.8% leading to a global efficiency of 88% at the operating point. The gross electrical power generated amounted to 1039 kW, which translates into 9102 MWh/year, with an economic value of 837,384 €/year which was completely consumed at the plant. It also represents 55.1% of self-consumption regarding the total electricity demand of the plant. The analysis of the system considering the use of the total installed capacity by adding a co-substrate, such as cheese whey or microalgae, reveals that total electrical self-consumption is attained when the co-substrate is directly fed into the digester (cheese whey case), obtaining 16,517 MWh/year equivalent to 1,519,160 €/year. The application of thermal hydrolysis as pre-treatment to the co-substrate (microalgae case study) leads to lower electricity production, but still attains a better performance than a mono-digestion baseline scenario.

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A Review of Novel Turbocharger Concepts for Enhancements in Energy Efficiency

Cited by 18 publications

References 16 publications

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

The Use of Short-Term Compressed Air Supercharging in a Combustion Engine with Spark Ignition

Current trends on combustion control methods using fuel reactivities

Energy Balance of Turbocharged Engines Operating in a WWTP with Thermal Hydrolysis. Co-Digestion Provides the Full Plant Energy Demand

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