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Abstract: A novel CaCl2/expanded graphite-NH3 adsorption refrigerator is developed and tested. Only three valves are installed in this refrigerator and they all work at the same positive pressure condition, so the operating reliability of the refrigerator is greatly improved. The experimental results show that the refrigerating power QCP, COP, SCP, electricity COPEl, and volume refrigerating density QCP-V of the refrigerator are 11.4kW, 0.27, 422.2W/kg, 32.6 and 57kW/m3, respectively, under the following conditions: the temperature of heating vapor is from 120°C to 140.3°C, the cooling water temperature is 25°C, the evaporation temperature is −15°C, the heating/cooling time is 25min including 45s mass recovery time. The SCP and volume refrigerating density of this refrigerator are about 1.8times and 1.5times that of the maximum of the former test results by other researchers. [Copyright &y& Elsevier]

Abstract: The performance of a solid sorption icemaker is investigated. CaCl2/activated carbon was used as compound adsorbent and ammonia was employed as adsorbate. The influence of operating conditions (cooling water temperature, mass recovery and heat pipe heat recovery, etc.) on the mass of ice, SCP (specific cooling power) and COP (coefficient of performance) was experimentally assessed. At the desorption temperature of 126°C, cooling water temperature of 22°C, ice produced temperature of −7.5°C, 40s of mass recovery and 2min of heat pipe heat recovery, the mass of ice, SCP and COP values are 17.6kg/h, 369.1W/kg and 0.2, respectively. [Copyright &y& Elsevier]

Abstract: Adsorption performances and thermal conductivity were tested for three types of adsorbent: Pure CaCl2 powder, simple composite adsorbent and consolidated composite adsorbent. The simple composite adsorbents show better adsorption performance because the additive of expanded graphite in CaCl2 powder has restrained the agglomeration phenomenon in adsorption process and improved the adsorption performance of CaCl2. The consolidated composite adsorbent are suitable to be used as adsorbent for ice maker on fishing boats because they have higher thermal conductivity, larger volumetric cooling capacity, higher SCP values and better anti-sway performance than simple composite adsorbents. Thermal conductivity of the consolidated composite adsorbent is 6.5–9.8Wm−1 K−1 depending on the molding pressure, ranging from 5 to 15MPa, which is about 32 times higher than the thermal conductivity of CaCl2 powder. The volumetric cooling capacity of consolidated composite adsorbent is about 52% higher than the best result obtained for CaCl2 at the evaporating temperature of −10°C. The SCP of the consolidated adsorbent increases of about 353% than CaCl2 powder from simulation results at T ad=30°C and T ev=−10°C. The consolidated composite adsorbents have good anti-sway performance and they are not easy to be scattered out when the fishing boats sway on the sea. [Copyright &y& Elsevier]