The invention relates to the technical field of
solar heat energy system control, and provides a solar
phase change heat storage cooperative control method and
system, which ensure that the thermal physical state of a material is accurately sensed by introducing a calibration mode; in the heat collection stage, according to the comparison between the actual melting time consumption of the
phase change material and the reference melting time, the
latent heat attenuation coefficient is dynamically calculated, the heat storage capacity attenuation is evaluated in real time, and misjudgment of heat storage saturation due to material performance reduction is avoided; in the heat release stage, based on the
internal temperature of the heat storage unit and the water outlet temperature change of a user side, the
supercooling degree of the
phase change material is accurately determined, the
crystallization characteristic of the
phase change material is mastered in real time, and a basis is provided for
supercooling intervention; and the
system stores and updates the melting starting temperature, the
latent heat attenuation coefficient and the
supercooling degree in real time, and executes heat collection and heat release control according to the melting starting temperature, the
latent heat attenuation coefficient and the supercooling degree. According to the method, the problem of inaccurate control caused by performance change of the phase-change material is solved, the utilization efficiency of
solar heat energy and the stability of
heat supply are remarkably improved, and energy waste is effectively avoided.