Design Optimization And Performance Study On A New Type Of Liquid Delivery Pump

It is difficult to achieve a major breakthough in COP of the conventional ejector cooling system(ECS)limited by high consumption of the mechanical pump.The heat-driven pump system could benifit ejector cooling system which characterize inefficiency and inconvenient.No-pump valve switching ejector cooling system is promising but less reliable.In this paper,a review of heat-driven pump and no pump ejector cooling system is presented.Base on the new pump proposed by Zhejiang University,the design optimization is made to improve performance.CFD method is used to test the performance of the pump.In addition,experimental system is built to explore the characteristics and verify the simulation results.Main contents and conclusions of this study are as follows:(1)A CFD model was proposed for numerical calculation.Compared with the previous pump,the simulation results show that the delivery capability is greatly improved.The design optimization is successful and promising.(2)As revealed in CFD results,liquid delivery process is complex but with regularity to conform to.Mass flux rises linearly with increasing rotation rate in low rotation rate and then decrease,indicating that the new pump is easy to be adjusted and controlled.(3)The simulation result is verified by experiment that mass flux rises linearly in low rotation rate and then decrease with increasing rotation rate.(4)Input power of DC motor rises approximately linearly with increasing rotation rate at the same operating condition.The input power is nearly no relationshio of high pressure which is the best advantage of the new pump.So new pump is more attractive at higher high-pressure.(5)The efficency of the pump improved is similar to the conventional pump.New pump can be more efficient by improve the sealing effect,so it is worth further research.