A bench-scale adsorption-based TES system was designed, constructed, instrumented, and commissioned. In demonstrating this technology, the objective of this research was to obtain thermodynamic data for the adsorption of water vapour onto zeolite 13X under fluidization to evaluate fluidized beds as potential reactor or adsorber designs. Multiple adsorption experiments were performed on samples of an 8x12 and 60x65 mesh zeolite 13X molecular sieve, comparing the effects of air flow rate and concentration of water vapour on the breakthrough and temperature lift on the energy density of fixed and fluidized adsorbent beds. The concentraion of water vapour at the inlet or relative humidity of the air was shown to be one of the most significant parameters for controlling the delivery temperature of each bed. The results of the experimental data are were then considered in scaling the adsorbent beds to meet a range of heating loads.