Propulsion Electrification

Is Elevated Operational Temperature a Barrier to Solid-State Battery Adoption?

Student: Ryan Hughes
Cohort: Cohort 2
Date: 17 05 2021

Ryan presented the work from his MSc dissertation on solid-state battery at the Climate Exp0 conference in the Mitigation Solutions theme. With his supervisor Dr Christopher Vagg, he found that by utilising waste heat from the electrical power train, there is enough energy to heat thermally isolated solid-state battery modules in time for them to provide tractive power for a passenger vehicle. This is important as currently available solid-state batteries require an operational temperature of 60°C.

Chemical Energy Converters

Turbocompounding the Opposed-Piston 2-Stroke Engine

Student: Alex Young
Cohort: Cohort 1
Date: 22 09 2021

For Alex's MRes summer project, he studied the effects of “Turbocompounding the Opposed-Piston 2-Stroke (OP2S) Engine” with a focus on quantifying the expected Brake Specific Fuel Consumption (BSFC) improvement. In order to achieve this, Alex needed to first create a model of an OP2S engine within GT Power, an engine simulation software package. After the MRes year was finished, Alex was able to turn the summer research project report into a conference paper which was published as part of the SAE WCX World Congress Experience Digital Summit in 2021.

Chemical Energy Converters

The Effect of Crankshaft Phasing and Port Timing Asymmetry on Opposed-Piston Engine Thermal Efficiency

Student: Alex Young
Cohort: Cohort 1
Date: 15 10 2021

Opposed-piston two-stroke engines reveal degrees of freedom that make them excellent candidates for next generation, highly efficient internal combustion engines for hybrid electric vehicles and power systems. The effect of crankshaft phasing and intake and exhaust port height-to-stroke ratios on a range of scavenging performance parameters and other effects are explored in depth in his latest article in Energies: “The Effect of Crankshaft Phasing and Port Timing Asymmetry on Opposed-Piston Engine Thermal Efficiency”, where it has been shown that lean operation favours port timing asymmetry, whereas, under stoichiometric conditions, best efficiencies are found during symmetrical port timing. 

Digital Systems, Optimisation and Integration

A Case for Technology - Forcing Transformative Changes in the Formula 1 Power Unit

Cohort: Cohort 2
Date: 06 04 2021

A key chapter from Abdu's Master's thesis at Oxford Brookes University exploring Supervised Neural Network based Machine Learning Algorithms to Predict and Reduce Emissions in Internal Combustion Engines for Racing Applications was accepted for publication by SAE International 

The paper is titled "A Case for Technology - Forcing Transformative Changes in the Formula 1 Power Unit". Following a systematic methodology, it analytically examines area-specific emissions in F1 race events at different track stadia and proposes new targets for F1 power units in conjunction with current World Health Organization (WHO) and European Commission published exposure ug/m³ standards.

Propulsion Electrification

Assessing the Feasibility of a Cold Start Procedure for Solid State Batteries in Automotive Applications

Student: Ryan Hughes
Cohort: Cohort 2
Date: 05 02 2022

Originating from his Master's thesis, Ryan and his supervisor Dr Chris Vagg have published their findings in a new journal article seeking to address the feasibility of a cold start procedure for solid state batteries in automotive applications. The proposed solution involves dividing the battery into sub-packs and heating them sequentially to the required 60°C, primarily using waste heat from the electric powertrain. This could allow high energy density solid state cells to be used despite their temperature constraints.

Propulsion Electrification

Effect of Internal AC Heating on the Temperature Homogeneity of Different Size Battery Cells

Cohort: Cohort 2
Date: 12 02 2022

Howard's MRes Summer Project investigated the effect that AC internal heating had on the spatial temperature homogeneity of Lithium-ion cells. With his supervisor Dr Christopher Vagg, he found that the cylindrical MoliCel and DTP Pouch cells both demonstrated significant temperature gradients when heated from sub-zero temperatures. These gradients increased in magnitude with the size of the cell and for the pouch cells were affected further by the current gradients caused by tabs located at the same end of the battery.

Sustainability and Low Carbon Transition

Mobility As a Service: Why and How?

Cohort: Cohort 2
Date: 04 04 2022

Originating from her PhD research on Mobility as a Service (MaaS), Rita wrote a short article for the City Changers website on balancing the benefits and challenges of implementing MaaS in an urban context, providing a few practical steps towards a MaaS implementation.

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