Investigations Of Liquid Metals As Thermally Driven Substance Of The New Super Cooling Technique

New Super Cooling Technique based on thermally driven theory is a new kind of cooling Technique.Through former researches,the thermal physical properties of thermally driven medium has an important effect on the heat transfer of New Super Cooling Technique.Experiments have been performed to investigate the heat transfer charateristics of liquid metal Na-K.First, analyse the compatibility of liquid metals and metallic mateira then choose appropriate material to various liquid metals.Second,investigate the rules of the liquid metals with the changce of temperature the effect of various thermal physical properties on heat transfer was gained by numerical calculation。Third, experiments have been performed to investigate the heat transfer characteristics of liquid in the simple rectangle enclosure channel in centrifugal field. Na-K or Water was filled in enclosure channel as thermal driven medium. From those experimental data the heat transfer criterions have been correlated. The results show that the characteristic of the heat transfer of Na-K: the heat transfer was enhanced with the increasing in thermal density and rotational speed, and the cooling air Reynolds number. Compared the heat transfer efficiency of Na-K and water .Then, a numerical simulation of heat transfer for the New Super Cooling Technique was also conducted with Na-K and water as thermal medium.The results of experience and numberial calculation show that heat transfer efficiency of Na-K is better than that of water. It can be concluded that the property of thermally driven medium has an important effect on the heat transfer of New Super Cooling Technique.All the experiment investigations and numerical simulations show that liquid metals can be good heat transfer medium applied in the new super cooling technique.