A method and system for active regulation of a phase change cold storage and refrigeration host machine

Abstract

This invention discloses an active control method and system for coordinated phase change energy storage and a refrigeration unit. The system includes a main cold source, a dedicated low-temperature cold source, multiple liquid-cooled cabinets, cabinet-level latent heat energy storage devices, and a control device. The main cold source provides basic cooling for the return liquid in the cabinets. The basic coolant is diverted to a release branch and a bypass branch. The released coolant mixes with the bypass coolant to form the cabinet supply liquid. The dedicated low-temperature cold source solidifies the phase change energy storage medium for energy storage through a low-temperature charging circuit. The control device determines the target release flow rate based on the deviation between the actual supply liquid temperature and the target supply liquid temperature, and implements feedback regulation based on the actual release flow rate and the total flow rate of the cabinets. Simultaneously, it coordinates the charging based on the energy storage status of each energy storage device and the available capacity of the low-temperature cold source. Under the condition of sharing a main cold source, it adjusts the supply liquid temperature of different liquid-cooled cabinets separately, realizing the functional decoupling of basic cooling, local incremental cooling, and low-temperature energy storage preparation.

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