Increasing the Braking Energy Recuperation in Electric Transportation Grids Without Storage

When the braking energy in electric transportation grids is not met by another vehicle's demand, it is either harvested by storage systems or wasted in braking resistors. This paper looks at three methods for increasing the amount of harvested braking energy without the use of expensive storage systems: decreasing the substation voltage,...

Opportunity Charging of Electric Buses Directly from a DC Metro Catenary and Without Storage

A typical approach to harvesting the excess braking energy of a railway car has been to use a storage system. However, research momentum has been growing in the direction of integrating smart loads like EV chargers into traction networks, and this can offer a more efficient and economical solution to the harvesting of braking energy. This paper...

Hybrid sol-gel coatings for reducing wettability and storage degradation of biomass pellets

Long transport distances and extended storage of biomass pellets especially in humid environments provide a suitable setting for enhanced degradation in the form of moisture sorption, cracking and attrition. We developed an optically transparent, low-cost and environmentally friendly coating to reduce moisture sorption and storage degradation...

A Review of the Key Technical and Non-Technical Challenges for Sustainable Transportation Electrification: A Case for Urban Catenary Buses

The transport sector has been increasing rather than decreasing its CO2 emissions, and its sustainable electrification faces a number of technical and non-technical challenges. This paper investigates these challenges, namely those of the grid load demand modelling, renewables integration, the present infrastructure limitations, and the...

Influence of sand drying and mixing sequence on the performance of mortars with fine recycled concrete aggregates

Fine recycled concrete aggregates (fRCA, 0–4 mm) are produced from demolished concrete structures and consist of natural aggregates and old cement mortar. The presence of old cement mortar has detrimental effect on the fresh properties and strength of new concrete. This study aims to investigate the working mechanism and effectiveness of...

Why fully liberalised electricity markets will fail to meet deep decarbonisation targets even with strong carbon pricing

Full decarbonisation of the electricity system is one of the key elements to limit global warming. As this transition takes place, the electricity system must maintain system adequacy and remain affordable to consumers. In liberalised electricity markets investors are seen as key actors driving this transition. Due to the intermittent...