Simulation And Optimization Of Hydrogen Fuel Cell Electric Propulsion System For Yacht

The tourism industry plays an important role in the development of the national economy gradually.The tourism policies are introduced frequently,at the same time,the yacht industry has ushered in a new round of spring.After the gradual warming of the small and medium-sized yacht market,problems have followed,such as pollution and noise.In order to respond to the relevant laws and regulations about environmental protection and low-emissions,the design and manufacture of green yachts is imminent.The fuel cell electric propulsion device has the features about high-efficiency and non-pollution,which are in line with the design concept of the green yacht.The propulsion device has already been widely used in the electric vehicle industry for a long time.Thus,in the future,the fuel cell power supply system will be popularly in the shipbuilding industry.This article focused on the study of yacht propulsion devices and designed the fuel cell electric propulsion system,which was based on the characteristics of the yacht.It used the hydrogen fuel cell as the main power source and the battery as an auxiliary power.First of all,according to the basic parameters of the yacht and the fuel cell’s operating characteristics,the paper researched the main components such as fuel cell,propulsion motor,thruster,auxiliary battery,DC-DC conversion device,etc.,and the yacht fuel cell electric propulsion system was selected and configured;After matching the basic parameters of the main components,the parameters of the entire yacht fuel cell electric propulsion system were determined: Two proton exchange membrane fuel cells rated at 20 k W were selected as the main power supply system,two permanent magnet brushless DC motors with a rated power of 15 k W were used as propulsion motors,MAU 4-blade propeller with diameter of 550 mm as yacht propeller,the Ni-MH Battery with 70 Ah Capacity as auxiliary battery in fuel cell electric propulsion system,and used the Boost converter with a boost voltage regulation function,which output voltage was 380 V.According to the selected parameters,combined with the work requirements of the yacht under different working conditions,three different energy control strategies were analyzed;then,under the MATLAB/Simulink simulation environment,the main components of the entire yacht were modeled in sections and analyzed.The operation of each component and the output characteristics were researched,and then the various components were organized and integrated,and through the Co-simulation to understand the output characteristics and reliability of the entire yacht fuel cell electric propulsion device;To make a safer and more reliable source of hydrogen,the paper based on the selection,calculation,and the establishment of the fuel with the yacht.Finally,three-dimensional model of the metal hydrogen storage device matching with the battery electric propulsion device was optimized and designed.According to the established simulation model,the fuel cell stack model supplied power to the yacht individually and the electric propulsion model that the fuel cell and the nickel-hydrogen storage battery supplied power to yacht together were compared in this paper.After the simulation,different characteristics of the fuel cell electric propulsion system device were obtained.After the simulation model was running,the characteristics of the ship speed changes,system output power,and system efficiency were compared and analyzed.Combined with the characteristics of the existing yacht propulsion system,the maximum speed of the yacht was 7.9 kn.At the same time,the speed of the propulsion motor was 1920 r/min,the propeller speed was 940 r/min,the power was 27.3 k W,and the speed was at economy speed.When the motor speed reached to 1100 r/min,the speed of the yacht can reach to 4.7 kn,the hydrogen consumption was 0.68 kg/h,and the yacht sailing time was 6.9 h.The above parameters all met to design requirements of the yacht hydrogen fuel cell electric propulsion device,and thus the feasibility and accuracy of the yacht fuel cell electric propulsion system was determined.Finally,the prospects for the research and popularization of fuel cells in the shipbuilding industry are presented.