Simulation Of Loading Operation Of LNG Carrier Cargo Handling Simulator

With the over-consumption of petroleum resource, global warming is becoming worse, LNG, the international recognized clean energy, is the best succedaneum for fossil fuel. During the12th five-year plan, the proportion of non-fossil fuels consumption in primary energy consumption will increase to11.4%. LNG, the most widely used clean energy, will certainly play a more vital role. By2015, about100LNG carriers will dedicate to LNG transportation for our country, thus a large amount of LNG seafarers and shore operators need to be trained. By now, there is no LNG carrier cargo handling simulator product in our country, therefore developing LNG carrier cargo handling simulator with self-owned intellectual property rights will not only meet the domestic demand for LNG training, but also fit the strategy of constructing a marine powerful nation.Based on Neptune CHS LNG-M type cargo handling simulator, combined with dimension data and equipment parameters of LNG carrier DAPENG SUN, a LNG loading operation simulation system is developed in this thesis.Under the VB6.0development environment,8different interfaces are designed including Picture Directory, Shore Tanks, Ship/Shore Connection, Manifolds, Deck Lines, Cargo Tank, Compressor Room and High Duty System.7mathematical modules are built containing Liquid Level of Cargo Tank, Cargo Tank Temperature, Cargo Tank Pressure, Shore Pump, High Duty Compressor and Vapor Return. As a result, the simulation of Preparations for Loading, Cargo Lines Cooling Down, Load Cargo with Vapor Return to Shore and Nitrogen System Striping Cargo Lines are realized. The system has the function of real-time simulation and3grades of super real-time simulation.The running results of the system show that dynamic simulation of LNG cargo loading operation is basically realized. The system also corrects some errors in LNG-M simulator, such as the unreasonable trip of high duty compressor. The system can under- take primary training tasks for LNG seafarers and shore operators. The research results of this thesis have a certain reference value for further developing LNG cargo handling simulators.