Phase-change energy-storage heat exchanger

Abstract

The invention discloses a phase-change energy-storage heat exchanger. The phase-change energy-storage heat exchanger comprises a housing, a heat exchange tube and a phase-change energy-storage material filled between the heat exchange tube and the housing, wherein meshy heat transfer units are arranged on the heat exchange tube; the meshy heat transfer units stretch out of the outer surface of the heat exchange tube and located in a space between the housing and the heat exchange tube; the meshy heat transfer unit are N groups of forked fin structures distributed along the peripheral surface of the heat exchange tube; a chaotic flow channel is formed in the heat exchange tube; the chaotic flow channel comprises a first position flow channel, a second position flow channel and a coupling flow channel; the first position flow channel is composed of first flow channels arranged along the axial direction of the heat exchange tube at intervals; the second position flow channel is composed of second flow channels arranged along the axial direction of the heat exchange tube at intervals; the first flow channels are located at the interval positions of the second flow channels; and the coupling flow channel is connected with the first flow channel and the second flow channel. The phase-change energy-storage heat exchanger disclosed by the invention is capable of realizing efficient storage and utilization for energy, alleviating mismatching of energy supply and demand, and realizing optimized operation of a heat energy system.

Description

technical field [0001] The invention relates to a phase change energy storage heat exchanger, in particular to a phase change energy storage heat exchanger based on a mesh heat transfer unit and a chaotic flow channel. Background technique [0002] Energy storage technology can effectively alleviate the mismatch between energy supply and demand in terms of time, location, and intensity. It is an effective way to rationally utilize energy and reduce environmental pollution, and it is also an important means for optimizing the operation of generalized thermal energy systems. Phase change energy storage technology utilizes the characteristics of energy release or absorption when materials undergo phase changes, and has the characteristics of high energy storage density, constant temperature, easy matching with the operating system, and easy control. In recent years, as phase change energy storage systems are widely used in energy-saving fields such as solar thermal utilization,...

AI Technical Summary

Problems solved by technology

We know that the small thermal conductivity of the phase change material makes the freeze-thaw phase change rate slow, especially in the case of a large inner diameter of the concentric sleeve, the heat exchange effect between the phase change material and the fluid is not ideal, which will affect the solid-liquid Phase change, a form of high-density energy storage and release heat transfer, is popularized and applied in thermal systems. Therefore, it is urgent to carry out solid-liquid phase change to enhance heat transfer.

In addition, the flow heat transfer performance in the traditional cylindrical heat exchange tube also needs to be optimized and improved.

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