16300t LNG燃料动力化学品船能量利用系统的模拟分析与优化

针对16300吨LNG燃料动力化学品船LNG气化冷能未加以利用的现状,本文在分析及评估原船废气余热及冷却水系统用能水平的基础上,综合考虑LNG冷能、主机废气和缸套冷却水的能量梯级利用,针对船舶对发电、海水淡化、冷库及空调等需求,以加装废气动力涡轮、LNG冷能ORC发电、冷冻法海水淡化及设置高低温冷库与空调系统等方式组合提出了四套综合能量利用系统方案。进一步利用Aspen HYSYS软件对该船原有能量利用系统与新方案进行了模拟分析,并从?效率及经济性两个方面对各方案进行了评估。结果表明,诸方案中以低温冷库+海水淡化+高温冷库+干燥舱系统方案经济性最好,所形成的新系统经优化后?效率可提高至67.16%,每年经济收益可达595.8万元。

Simulation Analysis and Optimization of Energy Utilization System for a 16300 Ton LNG Fuel Powered Chemical Tanker

On the basis of the analysis and evaluation of the waste heat of the original ship"s exhaust gas and the energy level of the cooling water system, the energy cascade utilization of the LNG cold energy, the exhaust gas of the main engine and the cooling water of the cylinder sleeve is considered on the basis of the analysis and evaluation of the energy level of the waste heat of the original ship and the cooling water system of the cooling water system for the 16300 ton LNG fuel power chemical ship. Four sets of integrated energy utilization system are put forward in order to adjust the demand, with the combination of exhaust power turbine, LNG cold energy ORC power generation, freezing method seawater desalination, and setting high and low temperature cold storage and air conditioning system. Further using Aspen HYSYS software, the original energy utilization system and new scheme of the ship are simulated and analyzed, and each scheme is evaluated from two aspects of efficiency and economy. The results show that the scheme with low temperature cold storage, sea water desalination, high temperature cold storage and dry tank system is the best, and the efficiency of the new system can be increased to 67.16%, and the annual economic income can reach more than 600 yuan.