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Rail: a promising career sector

In France and abroad, there is a shortage of engineers specializing in Guided Transports and Rail.

News juin 2018 2

TGV, tramways, automatic metros, mechanical lifts, carousels, are all poorly known means of guided and rail transport that offer interesting perspectives for engineers with a taste for a technical challenge. The sector sometimes suffers from an outdated image, although innovation is present more than elsewhere, and French expertise is recognized all around the world.

There are more opportunities here than in other sectors and exciting careers to be had in France and abroad. Fer de France, an interprofessional organization bringing together actors in the rail sector, announced that it needed 1,000 engineers per year although only 400 are being trained in specialist schools. ESTACA is one of the only schools in France offering a specific Guided Transports and Rail programme.

This option is available from the 2nd year of the preparatory cycle and in four years provides in-depth knowledge of the sector. With 12 months of internships, concrete projects, professional teachers and partnerships with companies such as SNCF, Alstom, Ikos Consulting or Keolis, students are fully operational on graduation from the School. This programme offers the best rate of employment with 91% of students working before they graduate and 100% have a permanent job within 2 months of graduation. There are also plenty of extra-curricular activities and emulation between students passionate about trains, trams and other guided or rail vehicles: the association ESTATRAIN organizes site visits, a study visit to the international Innotrans show in Berlin for all 4th-year students, and designed and built a TGV driving simulator.

If you are looking for a challenge for the future, the rail sector awaits!

2018 CAREER FAIR: THE Corporate Event at ESTACA

forum entreprise2017

November 15th and 16th 2018 (Attendance possible for 1 or 2 days)

Recruit ESTACA students and promote your company!

The ESTACA Career Fair is the ideal opportunity to meet our students. This event will help you to develop your visibility and reputation, and recruit your next engineer interns.

For students, it is an opportunity to:

  • Learn about the current industrial context, and companies’ needs for expertise
  • Meet the School’s industrial partners and discover new companies that are recruiting
  • Benefit from the valuable advice of professionals present
  • Apply and find internships
  • Meet and exchange with Alumni

Place: Saint-Quentin-en-Yvelines Campus.

Student attending: all 4th and 5th year students (750) from our two campuses (Laval and Saint-Quentin-en-Yvelines).

Its purpose is to guide students in building their professional project, and allow them to meet with key players in the transport sector. During this Fair, our engineering students will be looking for work experience. This event is an opportunity for them to meet with you and apply for internships in your company.

There are many ways of meeting our students:

  • Stands: a specific space devoted to your company where you can receive students (promote your business, present your internships, resume coaching, etc.).
  • Conferences: on your fields of expertise and various cross-disciplinary issues.
  • Recruitment interview exercises (on registration).
  • Participation of your ESTACA engineers at the SpeedNetworking evening on Thursday.

For any questions and registration for the ESTACA Fair, contact Cyril Hesni-Alvarez - Tel.: +33 1 76 52 11 36 – Mail.

These companies were present in 2017:

Z ZF GROUP

A ABYLSEN - AGAP2 – AKIEM - AKKA TECHNOLOGIES - ALLIANCE AUTO – ALSTOM - ALTELIOS TECHNOLOGY – ALTEN – ALTER SOLUTIONS ENGINEERING – ALTRAN – ANDRICE – ANSALDO STS – AOTECH – ASSYSTEM – ASTEK – AUSY - AVL LMM
B BELCOTECH – BERTRANDT – BOSCH
C CHASSIX - CLAAS Tractor SAS - COLAS RAIL - CONVERGENCES
D DAF TRUCKS - DASSAULT AVIATION – DAVRICOURT - DELPHI CONNECTION SYSTEMS France – DGA – DSPACE
E ECM - EGIS RAIL – ELS - EMC – EPSF - ERMEWA GROUP - ESSEC BUSINESS SCHOOL – ESTELLA CONSULTING - ETF
F FAURECIA - FCA GROUP - FEDERAL MOGUL SAS - FERCHAU Engineering SAS – FEV
G G2METRIC
H HEC – HEINKEL Group – HITACHI RAIL EUROPE - HTI AUTMOBILE GROUPE APSIDE
I IKOS CONSULTING – INNOVATEAM - IT LINK
J JEMS Group
L LATMOS – LCI – LGM GROUP
M MARINE NATIONALE - MCA INGENIERIE - MEDIANE SYSTEME – MINCATEC - MSX INTERNATIONAL
N NEXTER SYSTEMS - NGE
O ORECA - ORTEC ENGENEERING - OXIAM
P PARROT - PLASTIC OMNIUM AUTO INERGY SERVICES – POLYMONT ENGINEERING - Groupe PSA
R RATP - GROUPE RENAULT
S SAFRAN – SCALIAN – SEGULA TECHNOLOGIES – SETEC ITS – SIEMENS - SII IDF - SNCF Direction du Matériel – SOFREN GROUP - SOGETI HIGH TECH - STELIA Aerospace
T TAG AVIATION - TE CONNECTIVITY – TECHNOLOGY AND STRATEGY - TOYOTA France - TRANSDEV
V V MOTECH

Hybrid Energy Storage System For Electric Vehicles

actu nazim mai18Research Results by Nassim Rizoug, Teacher-Researcher at ESTACA'Lab

The Li-ion batteries remain the best technology to supply the electric vehicle (EV), because of their high power and energy. The use of this battery in some applications like motor sport can be limited by the thermal behavior of this technology. For that, we must decrease the stresses applied to the battery cells.

rizoug fig1Fig. 1: Hybrid storage system (Battery/Supercapacitors) for electric vehicles.

One way to improve the Li-ion battery performances and reduce its masse is to associate this battery with other technology as second power supply (Fig. 1). This strategy (hybridization) allows using a smaller battery for low power and the second powerful technology like supercapacitor to supply the very high power during the accelerations and regenerative brake. Hybrid energy storage systems (HESS) are used to optimize the energy management for electric vehicles. These solutions use separate energy and power sources in order to use their characteristics at their best, what allows a reduction of the size, efficiency or cost of the embedded source. In addition, one of the most important advantages of this novel approach is the improvement of the thermal battery behavior. As a result of this development, significant reductions in the cost and optimizing the performance of electric vehicles can be achieved.

Experimental results show that the RMS power of battery is effectively reduced. In our case, the performances of the battery alone are compared to that of the hybrid storage system. Three different strategies are used to manage this hybrid source (EMS1, EMS2 and EMS3).

rizoug fig2Fig. 2: Weight of the hybrid embedded power supply according to vehicle operating range rizoug fig3Fig. 3: RMS power stress applied to battery cell according to vehicle operating range.

The obtained sizing results prove the interesting of the hybridization in the electric vehicle applications. As we can see from the Figure 2, the hybrid embedded power supply with EMS3 offers a lower weight over the entire vehicle operating range. We can distinguish two main phases of the weight evolution for all proposed configurations. Firstly, when the weight is constant over vehicle operating range, and the second, when the weight increases rapidly according to vehicle operating range. This can explain the fact that the hybrid embedded power supply is sized in the first phase under the discharge power constraint, which is constant and more stringent than energy and charge ones. However, in the second phase, the energy constraint is heavily dependent on the vehicle operating range. As a result, this constraint of the energy consumption imposes the final size of the hybrid embedded power supply.

Figure 3 shows the RMS power stress applied to one battery cell for all proposed configurations. This test allows us to set up a first evaluation of the battery aging. In our case, we consider that the battery management system BMS prevents the imbalanced cell voltage in a series-connected battery pack. As a result, it is also assumed that the maintenance of the voltage balance at the charging and discharging phases is completely ensured by the BMS. As it can be seen clearly from Figure 3, the hybrid power supply with EMS3 provides a high RMS power stress in the first phase of constant weight when the discharge power constraint is more stringent than others. Thereafter, for high values of the vehicle operating range, this solution became much more interesting against the configuration of the single HP battery. The hybrid embedded power supply with EMS1 and EMS2, offer a low RMS power stress over vehicle operating range. This is owing to the fact that the battery pack contains a large number of cells.

rizoug fig4Fig. 4: Multiphysics model of the hybrid energy storage system.

Based on the HESS multiphysics model (Fig. 4), an improved rule-based strategy including the limitation of the battery power has been tested. Simulation tests of the aging cycling were done for a realistic electric vehicle profile in various operation ranges. It was noticed that proposed model can be used to study the influence of driving cycles and energy management strategies on the lifetime of the Li-ion battery and supercapacitor.

Future work is currently undergoing for improving the HESS multiphysics model, developing and designing new energy management strategies.

Hybridizing energy storage: an innovative and efficient solution for electric vehicles

vignette Actu pollution recherche 18

Presentation of the research conducted by Nassim Rizoug, ESTACA Lab Teacher-Researcher

Most car manufacturers currently use Lithium-ion technologies to power their electric vehicles. This type of battery frequently runs into issues, mainly in terms of range, cost and heat performance. For example, for application in motor sports, heating is considerable and does not allow for satisfactory acceleration.

The innovative solution developed at ESTACA is based on hybridizing the power source. This consists of using two complementary energy storage systems. For example: a Lithium-ion battery associated with a super-capacitor*, significantly enhancing the performance of the onboard energy storage systems in electric vehicles.

*What is a super capacitor? This is very powerful and efficient technology that is just starting to be used in transport, with a long life (1 million charge / discharge cycles compared to 2,000 to 3,000 for Lithium batteries).

The results of the research conducted by ESTACA’Lab show two main advantages to this innovative technology:

  • Lighter weight leading to energy savings and therefore cost savings (see mass/weight curve)
  • A net gain in the heat efficiency allowing for better performance and reduced constraints on the battery (below 300km range)

Nassim Rizoug has been working on this issue since 2007. He is now a renowned expert in this field. Several companies have worked with ESTACA’Lab (ESTACA’s research laboratory) on this project. Today, the school is cooperating with Gruau to optimise the power source and with motor sports partners working in Formula-e (Formula 1 championships for electric vehicles).
Students, future ESTACA engineers have also contributed by working on the issue as part of the end-of-studies projects in the ESTACA Reducing vehicle weight option.

Finally, four theses are being prepared on the issue of hybridization at ESTACA.

More than ever, ESTACA is key in creating and innovating in the mobility of the future, for cleaner, more economical and smarter transport.

Link to Nassim Rizoug’s article on the subject. He will be presenting it at the IBD LE MANS event.

ESTACA joins the PEGASUS Aerospace Network

vignette ACTU Europe Pegasus v2Accepted into the network that includes 27 of the best European aeronautics and space schools and universities, ESTACA confirms its position as a leading aerospace school.

PEGASUS (Partnership of a European Group of Aeronautics and Space Universities) is a unique European network for higher education in aerospace engineering. It includes 27 of the best establishments in 11 European countries. ESTACA was selected to join the network and becomes the fifth French school to do so, alongside ISAE SUPAERO, ENAC, ENSMA and the Ecole de l’Air. The eligibility criteria to join the network are:

  • The reputation and recognition of the quality of the education and research, nationally and internationally;
  • Professional opportunities for its graduates in industry over the last three years, showing the relevance of its engineering programme for the aerospace industry;
  • The issuing of diplomas in aeronautics/space engineering as part of the Bologne process.

Joining Pegasus will enable ESTACA to strengthen its ties with public institutions, and with European and international industries. It will also help the school to enhance promotion of the school’s space programs in Europe and develop the international reputation of the ESTACA diploma. PEGASUS