Experiment study on the start-up and heat-up of medium temperature cesium heat pipe
In order to solve the difficulty of heat transfer from heat pipe to medium temperature heat source,a medium temperature cesium heat pipe was developed in this study.In this study,the advantages and disadvantages of cesium metal as a medium temperature hot pipe were analyzed,the feasibility of cesium as a medium temperature heat pipe was determined,and three medium temperature cesium heat pipes were developed.In this study,three medium tem-perature cesium heat pipes of different specifications were started up and heated up by using the heat pipe start-up and heat-up experimental device.The results show that the cesium heat pipes can enter the normal working state near 500 K and fully start up.When the diameter of the steam chamber of the cesium heat pipe is 17 mm,the start-up tem-perature of the heat pipe is 510 K.When the diameter of the steam chamber is 22 mm,the start-up temperature is 495 K.When the diameter of the steam chamber is 25 mm,the start-up temperature is 485 K.The comparison test verifies that the start-up temperature of the cesium heat pipe decreases with the increase of the diameter of the steam chamber of the heat pipe.In the medium temperature range of 500～700 K,the axial points of medium temperature ce-sium heat pipe can be heated synchronously,and has a good isothermal properties.
cesium heat pipemedium temperature heat pipeheat pipe start-up test
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