Abstract:

Polyurethane type solid-solid phase change energy storage material can effectively improve the phase change energy storage capacity of asphalt, so as to reduce the temperature fluctuation while regulating the pavement temperature. Based on the above background, the influence of polyurethane-type solid-solid phase change energy storage materials on the temperature control effect of asphalt was studied. The classification standard of PCM was determined, and its energy storage principle and application were studied respectively. The characteristics of polyurethane solid-solid PCM were analyzed. On this basis, the boundary conditions of periodic heat storage were defined, and the energy variation rule of PCM was deduced according to the change form of cohesive energy density in the process of asphalt temperature regulation, so as to determine the influence of polyurethane type solid-solid PCM on the temperature regulation effect of asphalt.

Key words: polyurethane, Solid-solid phase change energy storage material, asphalt temperature control effect, boundary conditions for heat storage, cohesive energy density, energy change