A Study On Application Of Fuel Cold Energy In Large LNG-powered Container Ship Reefer Container

As the international community pays more and more attention to the emission requirements of ships,clean energy LNG is increasingly favoured by the shipping industry,and the use of LNG as a marine fuel and the cold energy released during its vaporisation process has become an effective way to save energy and reduce consumption.In response to the current problem of a serious surplus of cold fuel energy in large LNG-powered container ships and the large load on the power grid caused by the refrigeration of refrigerated containers,an LNG fuel cold energy utilisation system that uses LNG cold energy is proposed in this paper to refrigerate the cargo in refrigerated containers.The overall scheme for the indirect use of LNG cold energy has been formulated by combining the theory of cold energy use,and the large LNG-powered container ship named CMA CGM JACQUES SAADE has been selected as the mother ship.The solution for the use of large LNG-powered container ship fuel for refrigerated containers was designed.According to the location of the reefer containers on the large LNG-powered container ship,a simulation model of the indirect use of the large LNG-powered container ship fuel for reefer containers was built in Aspen HYSYS.With the help of MATLAB and the spreadsheet in HYSYS,the influence of the selected key factors on the system energy utilisation was investigated,and the optimisation of the LNG cold energy utilisation system was carried out in a layer-by-layer and global manner.The design and analysis of the key equipments in the LNG cold energy utilisation scheme were carried out.The structural design and analysis of key equipment such as the LNG heat exchanger in the system was carried out with the Aspen EDR.At the same time,in order to adapt the LNG cold energy utilisation system of the whole ship and upgrade the reefer containers,3D models of the LNG cryogenic heat exchanger and the new reefer containers were built using Solid Works and other 3D software to demonstrate the structure of the key equipment and the internal field changes.In summary,through the scheme design,simulation and optimisation of the LNG fuel cold energy utilisation system of the mother ship and the design and analysis of the relevant equipment,this study can not only broaden the channel of excess LNG cold energy utilisation for LNG-powered container ships,but also provide systematic support for the engineering application of LNG cold energy utilisation in ships and help the development of green shipping.