Research On Properties Of An Adsorption Ice Maker Driven By Exhaust Gas In Vessels

Environment and energy crisis has attracted worldwide attention, high energy saving and emission reduction has become the trend of the time. Solid adsorption refrigeration technology with energy conservation and environmental protection has been widely researched and developed. This paper, based on the consideration of recovery use of the waste heat from the Marine diesel engine exhaust gas, has designed and produced a solid adsorption test bench which can produce ice. The test bench, adopts the adsorption of unit tube type adsorption bed, and puts the refrigeration power at 3 KW, with fuel burning which simulates ship exhaust as heat source, normal temperature water which simulates seawater as cold source, and CaCl2-NH3 as adsorption working pair. In order to facilitate the quantitative study of test bench, the experiment adds the measuring elements. The experimental process can attain adsorption and desorption curve of adsorption machine under the different exhaust temperatures which is changed by adjusting exhaust gas burner.Though the comparison with the common used adsorption working pair, especially concludes the CaCl2-NH3 suitable for ship exhaust adsorption refrigeration system and at the same time analyzes some common advantages and disadvantages of the adsorption bed. In the end, it comes to the conclusion that unit tube type adsorption bed is suitable for ship exhaust adsorption refrigeration system.The experimental study found that in the process of desorption, with exhaust gas heating, adsorption bed temperature gradually rises, and so is the desorption rate. Then the rate begins to decrease after reaching maximum, when the adsorbent refrigerant in the adsorption is not enough. The higher the heat source temperature is, the shorter time it will take to reach the maximum. In the process of adsorption, adsorption rate is obviously influenced by the working condition, the higher the heat source temperature is, the slower the adsorption rate increases. This is because at the end of the process, the adsorption bed temperature is closed to heat source temperature. When it is suddenly switched to the working condition, absorbent temperature only can reduce down slowly after the bed temperature decreases.