A water-based phase change cold storage device under microgravity

Abstract

The invention provides a water-based phase-change cold storage device under microgravity, relates to the field of phase-change energy storage, and can be applied to extreme environments such as temperature control systems in spacecraft. The shell of the cold storage device is provided with an inlet and outlet for circulating fluid, and a number of microtubes are closely arranged inside the cold storage device and connected to the inlet and outlet of the circulating fluid. The peripheral space of the heat exchange section of the microtube is sealed by a layer of elastic liquid sac, and the microtube, the liquid sac and the cold storage medium sealed inside constitute a plurality of cold storage subunits with independent spaces. The outer surface of the liquid sac is bonded with a layer of network frame, and the microtubes, the liquid sac and the network frame maintain a coaxial position and form a compact honeycomb structure. The two ends of the liquid capsule and the microtube are respectively provided with throttling teeth and meshed with each other to achieve the effect of labyrinth sealing, and the two ends of the microtube are provided with expansion joints of corrugated structure. Micro-fins are arranged at the seal between the micro-tube and the liquid sac. The invention can effectively solve the problems of low cold storage efficiency and easy leakage of the cold storage device in extreme environments.

Description

technical field [0001] The invention relates to the technical field of phase change energy storage, in particular to a water-based phase change cold storage device under microgravity. Background technique [0002] The thermal control of spacecraft is one of the key technologies to ensure the safe and stable operation of spacecraft. The spacecraft operating in orbit need to continuously and periodically experience a thermal environment with a huge temperature difference near the perihelion and aphelion, and the operating temperature range of the electronic equipment in the spacecraft is basically -15 to 50 °C. Therefore, it is crucial to provide continuous, stable and sufficient thermal control for the spacecraft. When the radiation radiator cannot satisfy thermal control, it is necessary to assist temperature control through additional methods such as phase change cold storage devices and heat pumps. [0003] The phase change cold storage device is essentially one of the p...

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Problems solved by technology

[0009] In order to solve the problems of low cold storage efficiency, large space occupation, and serious leakage caused by the volume expansion of the cold storage medium in the existing cold storage device, the present invention provides a phase change cold storage device applied to spacecraft to meet the needs of long-term service in the spacecraft. Temperature control in extreme environments such as gravity, large temperature difference, strong radiation, and vacuum

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