In adsorption refrigeration systems

adsorbent commonly used is in the form of powder or granular. The thermal contact resistance between adsorbent particles and the thermal contact resistance between the sorbent and heat transfer surface are large. Using consolidated adsorbent is an effective way to improve heat transfer performance. In this paper

expanded natural graphite treated with sulfuric acid (ENG-TSA) is employed as the host matrix of composite activated carbon (AC) and composite CaCl2 adsorbents. An adsorption prototype using separate thermosyphon heat pipe technology is established. Owing to the highly thermal conductive consolidated adsorbents

no fins are needed inside the adsorbers. In the experiments

the system performance is analyzed from three aspects: heat transfer performance

cycle time and evaporation/condensation temperature. The results show that the COP

SCP and volumetric refrigeration density of the system employing AC/ENG-TSA are 0.140

86.1W/kg and 16.11 kW?h/m3

respectively

the COP

SCP and volumetric refrigeration density of the system employing CaCl2/ENG-TSA are 0.279，288.6 W/kg and 54.03 kW?h/m3

respectively. The refrigeration performances are improved significantly compared with conventional adsorbents.