▎ 摘　　要

NOVELTY - A heat transfer working medium comprises 29-31 %mass monochlorotetrafluoroethane, 68.9-70.8 %mass acetone, and 0.01-1 %mass three-dimensional structure graphene. USE - The heat transfer working medium is useful for enhancing efficiency of high-power LED lamp radiator. ADVANTAGE - The heat transfer working medium: can be prepared by a simple method; has low boiling point, stable state, and high heat transfer efficiency, which can solve the problem of high power LED lamp heat conduction; can improve the service life of the high power LED lamp by more than 2.5 times; reduces the influence of the installation angle of the LED lamp unit on the temperature of the lamp unit; expands the projection range of the LED lamp; and controls the temperature of the light-emitting panel of the LED lamp greater than 100 W at less than 60 degrees C. The temperature difference does not exceed 1 degrees C, and the lamp unit temperature can be reduced by 27 degrees C. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application method of the heat transfer working medium.