PROTOTYPES - LAGUNA FEVER

Laguna
LAGUNA - FEVER

     During the process of investigation of an ideal car with "zero level of emissions" and great staying power Renault company inclined to the exploration all of the possible ways. Due to FEVER project, which started in 1994, the company was focussing first of all on the possibility of fuel cell. This project got support of the European Commission thanks to involvement of other european partners - De Nora (Italy), Ansaldo (Italy, Volvo TD (Sweden), Ecole des mines de Paris (France) and Air Liguide (France).

     Knowledge about integration and use of the fuel cell in a car was the main aim of this project. For Renault and its partners the results were of a high importance. FEVER project was finished by a presentation of an experimental car to the European Commission in June 1998. This model, based on Renault Laguna Nevada, powered by fuel cell, is a car of "zero level of emission" and its staying power reaches 400 km.

      FEVER is a car powered by electric energy, which is produced by the fuel cell in the car. Fuel cell fed by hydrogen treats the aerial oxygen. Electric current is produced due to electrochemical reaction within these two elements, the rest - water and nitrogen - are released. 135 cells in the fuel cell gives under the voltage 90 V output of 30 kWh. Engineers were not focussing only on the best performance but also on real possibilities of the production. Afterwords convertor turns voltage to 250 V. Specific design of this convertor allows to get 92 % effectivity on the most of functional area. Electic current operates the engine with rotor, which powers the wheels. The engine is incorporated into gear fixed ratio. This combination allows to get high output, approx. 90 - 92% on a big part of functional area.
      Function and control of the systems is operated by a revision unit. It is a specific central computer, which also gives instructions to the subsystems with regard to the energy economy.
      Digital simulations were used during the process of creation and specification of function strategies. Set of batteries NiMH placed in front controls putting the auxiliary devices of the cell in operation and collects energy during braking. During acceleration and going up enlarges the performance.
      The cell would hardly work without necessary 8 kg of hydrogene. It is stored in liquid state in temperature -253C in cryogene box.
structure

(TEXT &foto Renault Club)