An innovative adsorptive chiller prototype based on 3 hybrid coated/granular adsorbers

of the first testing campaign performed under real HVAC operating conditions. The prototype presentstwo main innovative features aimed to achieve high values of cooling power density: (i) a newarchitecture, with 3 adsorbers connected to a single evaporator and condenser, that allows to performan advanced machine’s management strategy employing unbalanced durations of the isobaricads-/desorption steps, (ii) hybrid adsorbers realized embedding microporous Silica Gel loose grains intoaluminium finned flat tube heat exchangers previously coated with the Mitsubishi AQSOA FAM Z02sorbent. Water was selected as refrigerant while up to now the machine operates without any mass/heatrecovery.A first testing campaign has been carried out at ITAE labs by a test bench specifically developed forthermally driven chillers. Influence of the cycle time as well as the temperature difference betweencondenser (TM) and evaporator (TL) on the overall performance were highlighted. The experimental measurementsshowed that the chiller is able to deliver an average cooling power (ACP) ranging between 3.4and 4.4 kW, a volumetric cooling power (VCP) of 7.25–9.36 kW/m3, with a COP of 0.3–0.35 at TH = 90 C,TL 15–18 C and TM 25–28 C.