Study Of Marine Ejector Refrigeration Equipment Using Refrigerant Of R600a

As energy crisis and environmental pollution is becoming more and more serious, energy conservation and emission reduction have become the common responsibility of all the countries. At the same time, facing the problem of low energy utilization rate in our country, in answer to the call of our country, walking on the road of sustainable development, every industry needs to make adjustments to respond to the challenges of the energy crisis.Shipping is a kind of mode of transportation which has the largest amount of delivery, annual consumption of energy amount is tremendous, meanwhile, produces large amounts of pollutants. With the continuously decrease of world energy,in the event that fuel consumption accounted for the total transportation cost increasingly high proportion, further reduce the cost of transportation will become the core competitive performance of a fleet.In view of the above reasons, for marine economy and environmental protection concern, using of marine waste heat as high temperature heat source for ship refrigera-tion becomes the hot topic in the research again.As jet refrigeration can not only use the waste heat for refrigeration, but also it has no moving parts, long service life, and also can use environmentally friendly refrigerant. Therefore, this thesis presents marine jet refrigeration research programmes, for refrige-rant R600a, proceeds system design and experiment research, and finally puts forward to optimize scheme.This thesis aims at comparing and studying the research objects-refrigerant like R123、R134a、R600a and currently widely used R11and R12by reading large amounts of data. Then determine R600a as the refrigerant in this thesis by analyzing thermodyna-mic properties and impact of refrigerant on system performance.Design the structure of ejector by using the classical thermodynamic methods according to the thermodynamic and physic properties of R600a. On the basis of the Design condition of the ejector, select and design other component in the system and built a test platform. Find the inadequacy of the platform by experiment, and put forward suitable solutions.At the final part of the thesis is the optimization of the ejector structure design. The specific practice is to solve the maximum ejection coefficient the may exist in the given condition by using gas dynamic functional method and program with visual basic,and get the corresponding structural size. At last, numerically simulate by Fluent, and observe the rationality...