Transferproject T12

Porous Material for Increasing the Energy Density of Gas Accumulators

In this project we use the knowledge of mass adsorbtion and heat absorption to design an optimal material that maximizes the energy density of a gas accumulator in dynamic applications. Air springs and hydraulic accumulators are used as example systems with different pressure levels.

Gas accumulators are used in many technical systems to store energy. In mobile applications, these are used in suspension systems in the form of air springs and hydraulic accumulators.

Gas accumulators to be improved; left: Hydraulic accumulators for hydropneumatic suspensions; right: an air spring for car suspension

The aim of this new transfer project is to increase the energy density of gas accumulators in dynamic applications. This can save weight and packaging, both very valuable properties in mobile applications.

For implementation, two effects are used for this purpose, which act within the storage unit in a gas-solid system: (i) mass adsorption and (ii) heat absorption.

Left: One possibility for adsorbing heat is the open-cell foams shown here. Right: Activated carbon, for example, as used in air filters, is suitable for adsorbing substances.

In this project, the experimental and analytical results from project C9 and C4 from the third funding period will be transferred to industry. The two industrial partners for this project are Vibracoustic, market leader in the field of passenger car air springs and Hydac, a company covering all needs in hydraulics.

The aim is to find and test an optimum material for both air springs and hydraulic accumulators that combines the two effects of mass adsorption and heat absorption. This can be done using models and optimization methods already developed for heat transfer in dynamic applications and mass adsorption.

  Name Contact
Prof. Dr.-Ing. Peter Pelz
+49 6151 16-27100
Scientific Staff
Manuel Rexer M.Sc.
+49 6151 16-27126

industrial partner