Electric Boosting and Energy Recovery Systems for Engine Downsizing

Alshammari, Mamdouh; Alshammari, Fuhaid; Pesyridis, Apostolos

doi:10.3390/en12244636

Cited by 30 publications

(22 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2018, Alshammari et al studied a radial inflow turbine expander's performance with a novel back-swept blading applied for WHR in heavy-duty diesel engines. The investigation results in 4.3% efficiency, 6.3kW maximum power generated, and a pressure ratio of 5.9 maximum [14,15]. Finally, in 2019 Volkswagen and MAN prototyped integrating the WHR system into two conventional production vehicles: Golf 7, 2-1 TFSI EA888, and Demo truck D2676 LF25 Euro VI, respectively.…”

Section: Introductionmentioning

confidence: 96%

Steady State Testing of an Organic Rankine Cycle Designed for Exhaust Heat Recovery Applications in Truck Engines

Thaddaeus¹,

Ibrahim²,

Innocent³

et al. 2021

IJSGE

Self Cite

View full text Add to dashboard Cite

The transport sector is presently accountable for 1/4 of total greenhouse gas released to the atmosphere, with road transportation depicting 17.8% of the total transport emissions contributing to global warming's growing threats caused by the continuous release of exhausting gases from internal combustion engines (ICEs). These exhaust threats call for improved sustainable ways of deploying fossil fuel in an environmentally friendly manner. Many sustainable solutions have been suggested recently with others already in the market; however, another promising sustainable solution is the Organic Rankine Cycle (ORC) application on-board automobiles, which is still developing stage with the prospect of entering the market soon. This paper presents the results from the thermal performance testing of an ORC system coupled to a commercial truck engine for exhaust heat recovery, which otherwise is exhausted to the environment causing pollution and other environmental threats. The test was performed to complement a study on the potential viability of installing an ORC based exhaust heat recovery (EHR) system on-board highway trucks for improving the truck's thermal performance without added fuel consumption. The testing carried out at 40% of rated load, and 1700rpm engine speed achieved 4.22kW, 3.67kW, and 5.28% for peak power output, net power output, and cycle thermal efficiency of the ORC model, respectively. These results imply that installing the ORC system on-board long-haul trucks for exhaust heat recovery has a promising future.

show abstract

Section: Introductionmentioning

confidence: 96%

Steady State Testing of an Organic Rankine Cycle Designed for Exhaust Heat Recovery Applications in Truck Engines

Thaddaeus¹,

Ibrahim²,

Innocent³

et al. 2021

IJSGE

Self Cite

View full text Add to dashboard Cite

show abstract

“…As far as the authors know, it is the only important application currently existing in the ship propulsion field. On the contrary, Formula One cars have been using HTC since 2014, and there are good application prospects for hybrid electric passenger cars [17,18] and fuel cell vehicles [19]. Scientific studies on marine applications are also rather limited: the study in [20] considers the HTC use for high-speed diesel engines aboard fast naval combatants, while in [21], the authors compare the simulation of a four-stroke DF marine engine equipped with its original turbocharger (TC) and, alternatively, with the HTC.…”

Section: Introductionmentioning

confidence: 99%

Marine Dual-Fuel Engines Power Smart Management by Hybrid Turbocharging Systems

Altosole

Balsamo

Campora

et al. 2021

JMSE

View full text Add to dashboard Cite

The performance of a marine dual-fuel engine, equipped with an innovative hybrid turbocharger producing electric power to satisfy part of the ship’s electric load, is presented by a simulation comparison with the traditional turbocharging technology. The two distinct fuel types, combined with the hybrid turbocharger, involve a substantial change in the engine control modes, resulting in more flexible and efficient power management. Therefore, the investigation requires a numerical analysis depending on the engine load variation, in both fuelling modes, to highlight different behaviours. In detail, a dual-fuel engine simulation model is validated for a particular application in order to perform a complete comparison, reported in tabular and graphical form, between the two examined turbocharging solutions. The simulation analysis is presented in terms of the engine working data and overall energy conversion efficiency.

show abstract

“…Another state-of-the-art method to increase part-load efficiency is cylinder deactivation, where a certain number of cylinders is disabled while the remaining cylinders continue operation at a higher load and, hence, at a higher thermal efficiency [22][23][24][25]. Measures that have been implemented for some time are downsizing and supercharging or electric boosting, which lead to a higher power density and increased efficiency [26][27][28][29]. Fuel efficiency further improves by use of start-stop systems, which have become standard equipment in the automotive sector [30].…”

Section: Introductionmentioning

confidence: 99%

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

et al. 2021

View full text Add to dashboard Cite

Spark-ignited internal combustion engines are known to exhibit a decreased brake efficiency in part-load operation. Similarly to cylinder deactivation, the x-stroke operation presented in this paper is an adjustable form of skip-cycle operation. It is an effective measure to increase the efficiency of an internal combustion engine, which has to be equipped with a variable valve train to enable this feature. This paper presents an optimization procedure for the exhaust valve timings applicable to any valid stroke operation number greater than four. In the first part, the gas spring operation, during which all gas exchange valves are closed, is explained, as well as how it affects the indicated efficiency and the blow-by mass flow. In the second part, a simulation model with variable valve timings, parameterized with measurement data obtained on the engine test, is used to find the optimal valve timings. We show that in 12-stroke operation and with a cylinder load of 5 Nm, an indicated efficiency of 34.3% is achieved. Preloading the gas spring with residual gas prevents oil suction and thus helps to reduce hydrocarbon emissions. Measurements of load variations in 4-, 8-, and 12-stroke operations show that by applying an x-stroke operation, the indicated efficiency remains high and the center of combustion remains optimal in the range of significantly lower torque outputs.

show abstract

Electric Boosting and Energy Recovery Systems for Engine Downsizing

Cited by 30 publications

References 71 publications

Steady State Testing of an Organic Rankine Cycle Designed for Exhaust Heat Recovery Applications in Truck Engines

Steady State Testing of an Organic Rankine Cycle Designed for Exhaust Heat Recovery Applications in Truck Engines

Marine Dual-Fuel Engines Power Smart Management by Hybrid Turbocharging Systems

Increased Internal Combustion Engine Efficiency with Optimized Valve Timings in Extended Stroke Operation

Contact Info

Product

Resources

About