Energy sharing opportunity study for the Val-de-Fontenay SNCF/RATP station
How to share energy sources in a station and develop district-scale solutions?
Val de Fontenay is one of the few medium-sized stations to be used jointly by RATP and SNCF. The national rail operator has already begun working on energy efficiency in its stations, under the Smart Gare programme.
The R&D partnership between SNCF R&I and Efficacity consisted of studying three avenues for optimising the energy efficiency of SNCF stations, namely:
- Study of the potential for energy sharing in a multimodal hub shared by RATP and SNCF, based on characterisation of energy consumption;
- Study of the possibility of recovery and redistribution of train braking energy (using power-to-gas hydrogen storage) ;
- Studies of economic and business models for electric vehicle charging points around the station.
Methodology and results
Non-intrusive measurement campaigns were conducted to arrive at a detailed characterisation of energy consumption at the joint SNCF/RATP station in Val de Fontenay. Recommendations on smart management of plant operation (introducing timing according to context – station operating/not operating – seasonality, variation in passenger flows, etc.) and the introduction of a dashboard display (checking the implementation of recommendations, detection of consumption anomalies, and alerts) were made to SNCF as means of reducing consumption.
Solutions for the recovery, storage and redistribution of train braking energy in the form of heat and/or hydrogen, were studied on the basis of data on electric train braking provided by SNCF. A global model of the system, incorporating the electrolyser (hydrolysis, was carried out, along with a comparison of the size of combined electric and hydrogen storage facilities. The business model based on usage of the various means of mobility (bus, private vehicle, taxi) was used to test the consistency of needs with braking energy production/storage capacity.
The business and economic models for the charging service for electric vehicles, buses and trains, using locally produced solar energy or electricity from the grid, were also studied.