Heat Transfer Character And Experimental Research Of A Liquid Self-circulating Radiator For Electronic Component

The cooling technique of electronic component is one of key techniques which should be settled for development of electronic technique in the future. With increasing of electronic slug's frequency and development of electronic slug's integration and capsulation, the heat productivity of electronic component rapidly increases. Now the heat flow density of electronic component is up to 10~4W/m~2-10~5 W/m~2, and that it is increasing continually. So effective heat radiator should be designed to meet to cooling requirement, which has become one of important subjects in heat-transfer field. This paper thinks of this subject as study object and develops an effective, energy-saving liquid self-circulating radiator without pump for electronic component. In this paper, associating heat feature of electronic component with running environment, a liquid self-circulating radiator without pump was designed and produced. Then this radiator was used for electronic components. In the experiment, effect and performance were checked up. Based on the radiator, mathematic model was set up. Combing the calculating result with experimental result, the radiator was improved on to make it effective. The result was shown: With input power increasing, the temperature, the pressure and the flow are increasing. As the highest input power 115W is charged, the smallest thermoresistance is 0.55℃/W, the highest pressure is 4.15bar, the highest temperature on the surface of radiator is 78.5℃, the optimal charge ratio is 80%～100%, under this station the biggest flow is 12g,the smallest charge ratio is 60%. Among R123,R11 and R113, the performance of R123 is the best. The one key to resolve the heat-transfer effect lies in making the refrigerant circulating rapidly and completely, the other one lies in decreasing the thermoresistance of evaporating section. The experiment shows that the mathematic model closely fits to the radiator. Moreover, the liquid self-circulating radiator without pump is applicable to electronic component. This study can provide directions and experience in the future research.