On Condensation Characteristics Of Vapour Spewing Supper-cooling Water Surface Vertically

It make the nuclear power stations safe by bringing forword the unselfconscious security system,but the system must be accord with the condensation characteristics of vapour spewing to uppercooling water surface vertically.It is why we conduct the experiment and research based on the requirement and the commission of company.The paper is on how to set up lab platform of vapour spewing to uppercooling water surface to coagulate directly and to observe and analyse which vapour coagulate on the water surface ,the results enable people to know the security system of nuclear power .The range of the pressure parameters of PRZ is from 0.2MPa to 0.6MPa ,and the range of the initial temperature parameters of CMT is from 23.5℃ to 78.5℃,all of the testing points are 30 and there are fifty thousand testing data.Many results of vapour spewing to uppercooling water surface vertically to coagulate can get.For example:① Coagulating can make the water of CMT surge forcefully when vapour spews to uppercooling water surface,too many vapour-bubbles come into being and strike the water of CMT owing to rupture continually,all these will strengthen the surge because of the vapour pressure of CMT.② The vapour pressure is moving up slowly as the vapour of PRZ coagulates on uppercooling water surface at first and all the vapour can be coagulated;With the process of condensation,the vapour pressure between CMT and PRZ will approach gradually till balance.③ There will be a hot water layer in the water of CMT when vapour spews to uppercooling water surface vertically and coagulates directly. The higher of the vapour pressure of PRZ and the initial water temperature of CMT are,the deeper the hot water layer is .And obtaining the experience formula of the hot water layer is as follows:④ The condensation coefficient is high when vapour coagulate at first,then it will lessen with the process of coagulation, The higher of the vapour pressure of PRZ and the initial water temperature of CMT are,the higher of condensation coefficient is.⑤ Vapour velocity at inner-tube of CMT is fast when vapour coagulates at first andthe velocity will be lessening with the process of condensation. The higher of the vapour pressure of PRZ and the initial water temperature of CMT are,the higher of the vapour velocity is. At last obtaining the experience formula of the vopour velocity at inner-tube of CMT at first 150 seconds of condensation:...