The temperature level of a storage system determines the user temperature. For this reason the particle surface temperature should be known and it was measured at the same position z as the vapour pressure was measured in the fixed. The pressure p is a direct measure for the mass m of vapour which itself determines the heat released in the phase transition i. e. in the adsorption process. In Fig. 3 the temperature T and pressure p measurement in the fixed bed of spherical zeolite 13X particles of average diameter of dp=1.51mm are shown. The arrows in the diagram are pointing on the same sensor signal time t at which the pressure and temperature sensors at the same position z are showing an increasing signal. A direct correlation of the pressure p and temperature T development can be seen.

In a sorption storage system the reachable temperature T has a dominating focus of interest because it determines the succeeding use. Although this main parameter is determined by the dynamic behaviour in the adsorption process through the pressure p development in the fixed bed mainly temperature

measurements are shown in the following section and through the above mentioned correlation of T and p the interpretation of results holds for all experiments.