| With the progress and development of society,the demand for energy in human material and cultural life is increasing,the problem of energy shortage and environmental pollution is becoming more and more serious,which has gradually become a huge hidden danger under the development of social economy in China.Among them,the world’s shipping industry,as a major consumer of fossil fuels,in the traditional energy supply system,only a small part of the energy of fossil fuels is converted into useful work,and most of the remaining energy is directly discharged by the residual heat in the main engine exhaust To the outside of the ship,a large amount of energy wasted.With the continuous improvement of ship energy efficiency rules,the gradual increase of shipping costs,and the continuous shortage of energy issues,today’s ship energy conservation work,improve energy efficiency,and reduce shipping costs have become the current domestic and foreign ship-related industries and the International Maritime Organization Common problems.The distributed combined cooling heating and power system is a domestically emerging system based on the principle of energy cascade utilization,which supplies cooling and heating loads to users based on user needs.It attracts much attention from all circles for its excellent characteristics of energy saving,high efficiency and environmental protection.This paper takes the "Sansha No.1" transportation supply ship as the research object,applies the principle of energy cascade utilization in the distributed cogeneration system to the waste heat utilization system of the main engine of the ship,proposes the ship’s cogeneration system,and heats it up.Comprehensive analysis and evaluation of economy and multiattributes have laid the foundation for energy saving and emission reduction in the shipping industry.First,based on the research background of the "Sansha No.1" traffic supply ship,the cold and heat loads of the ship are calculated respectively: air conditioning load 303.33 k W,heating load 0k W,domestic hot water load 291.28 k W,fuel oil,skid Oil preheating load 1033.33 k W.According to different working conditions,the electric load of "Sansha No.1" traffic supply ship without air conditioning is obtained: 678.43 k W for sea navigation conditions,1417.19 k W for entry and exit conditions,179.70 k W for parking conditions and 103.99 k W for emergency conditions.Then,based on the obtained ship’s cooling and heating power load,two sets of ship’s cooling,heating and power co-generation system schemes were designed and the equipment was selected.Then,the three sets of combined supply systems including the original energy supply system were analyzed and evaluated in terms of thermal economy and multi-attributes.A comprehensive analysis shows that although the investment recovery period of the ship’s combined cooling and power system based on absorption chiller in Option 1 is shorter than that of Option 2,the overall economic benefit of the ship’s combined cooling and power system based on gas turbine power generation in Option 2 is it has more advantages.Finally,for the purpose of thermal comfort and energy saving of the ship’s airconditioning cabin,through the parametric design of the cabin air-conditioning system and the improvement of airflow organization,the "Sansha No.1" ship’s dwelling cabin is taken as the research object,using CFD theory and methods: Fluent airpak 3.0,a commercial CFD software,was used to simulate the thermal comfort in cabins with different airflow patterns.The temperature distribution,velocity vector distribution,air age distribution,and air age distribution for each airflow pattern were obtained.PMV distribution and PPD distribution.Through comparative analysis and comprehensive consideration,the most comprehensive conclusion is that the indoor thermal comfort under the form of the top air return and bottom air supply is the best,which can appropriately increase the temperature of the air supply and has the potential for energy saving. |
PDF Full Text Request