Une étude couplée de comfort au vent et d’îlot de chaleur urbain dans le cadre du projet de site de Paris Austerlitz :
L'hypercube is proud to have contributed to the Grand Prix National de l'Ingénierie 2021, won by AREP teams, for the transformation project of the Saint-Michel Notre-Dame station (RER C).
For the hypercube, it is the recognition of the Air Quality expertise, born during this project in 2017.
After preliminary study phases that were marked by the development of predictive models of air quality in train stations and a fruitful collaboration with the CSTB allowed us to develop a simulation framework to estimate the ventilation induced by train passages ("piston" effect),the main driving force of the air quality improvement on this project.
Subsequently, we had to deal with other site constraints, such as acoustics and flood control. It is precisely this collective and iterative work of the different engineering departments that was rewarded by the GPNI!
Below is a video presentation of the main challenges of the project:
An annual wind comfort study, in and around a new passenger building, as well as on the platforms.
#Paraview
In the beginning of 2021, we completed the development of a tool for simulating surface temperatures in an urban environment, using a weak coupling approach between temperatures and air velocities
The approach allows for comfort indexes computations at each point in space. It integrates the coupling of fluid mechanics simulations, together with sunlight and thermal dynamic regimes for the built environment.
Results of a case study around the Strasbourg train station (France) are presented next.
The following animation shows the evolution of comfort levels over the first week of the year Sit back and relax!
The study of comfort levels in the Paris Est train station development project was conducted using several steps / methods:
Some graphic results below.
The comfort level study was conducted using several steps / methods:
The result in pictures!
A study on possible variants for the improvement of the summer and winter comfort of the main hall, implementing the following phases:
A study on possible variants for the improvement of summer and winter comfort of the side halls as well as the transverse platform implementing :
Below is an animation about the evolution of comfort levels during genetic optimization, according to the "growth" of generations:
Each "dot" that appears corresponds to a complete comfort study (point 1 above) and each color change corresponds to a new generation. The objective of genetic optimization is to find the best compromise between summer and winter comfort (Pareto front).
Feasibility of cooling by natural ventilation for the administrative premises as part of the "AZUR Technicentre" project in Nice Saint Roch:
Development of a differential equation physical model for the prediction of PM10 / PM2.5 concentration in underground stations, in order to evaluate the relevance of technical solutions aimed at improving air quality (ventilation, filtration, etc.).
For more details, have a lok at our scientific publications (published in Transportation and Research, Part D, published in STOTEN).
