A novel double heat pipe type adsorber, which uses compound adsorbent of CaCl2 and expanded graphite to improve the adsorption performance, is designed. The double heat pipes are integrated into the adsorbers in order to solve the problem of the corrosion between seawater and the steel adsorber in ammonia system and improve the heat transfer performance of the adsorber. There are two kinds of heat pipes integrated with the adsorber. One is the split type heat pipe for heating the adsorber in desorption phase, the other one is the two-phase closed thermosyphon heat pipe for cooling the adsorber in adsorption phase. The performance of two-adsorber adsorption chiller integrated with double heat pipes is predicted. The heat transfer performance of the heat pipes can meet the heat demands for adsorption/desorption of the adsorbent when the heating/cooling time is 720s and mass recovery time is 60s. When the exhaust gas temperature is 550 degrees C, the cooling water temperature is 25 degrees C, the inlet and outlet chilled water is -10 and -15.6 degrees C, respectively; the simulation results show that the cooling power and COP of this adsorption system are 5.1 kW and 0.38, respectively. (C) 2007 Elsevier Ltd. All rights reserved.