Solid-liquid phase change heat storage device with built-in movable heat exchanger and using method

Abstract

The invention discloses a solid-liquid phase change heat storage device with a built-in movable heat exchanger and a using method, and relates to solid-liquid phase change heat storage. The device comprises a heat storage box body, a heat absorption heat exchanger, a heat release heat exchanger, a motor, a controller, a temperature sensor and an electric heater, wherein rails are arranged at the upper ends of the left side and the right side of the heat storage box body; the heat absorption heat exchanger and the heat release heat exchanger are arranged inside the heat storage box body; rolling bearings are mounted at an inlet and an outlet of the heat absorption heat exchanger and an inlet and an outlet of the heat release heat exchanger respectively, are arranged on the rails, and can move along the rails under the driving of the motor; and the controller, the temperature sensor and the electric heater are combined, so that the heat storage and release process can be automatically completed according to needs. According to the device, on the premise that the heat exchange area is not increased and the heat storage density is not influenced, the heat exchange temperature difference is reduced, the heat storage and release efficiency is improved, the supercooling and phase separation of the phase change heat storage material are effectively reduced, and the service life of theheat storage material is prolonged.

Description

technical field [0001] The invention relates to a solid-liquid phase change heat storage technology, in particular to a solid-liquid phase change heat storage device with a built-in movable heat exchanger. Background technique [0002] Phase change heat storage is an important technology to improve energy utilization efficiency and protect the environment. It is also an effective way to alleviate the mismatch between energy supply and demand in terms of time, intensity and location. Waste heat and recovery of waste heat, energy saving of industrial and civil buildings and air conditioning have broad application prospects, and have become research hotspots worldwide. [0003] At present, solid-liquid phase change heat storage devices are mainly divided into two categories. One type mainly includes a heat storage box and a phase change heat storage unit. The phase change heat storage unit encapsulates the phase change heat storage material in a corresponding container and arr...

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Problems solved by technology

The above-mentioned device mainly has the following problems. The heat exchange pipeline is fixedly installed in the heat storage box. Only by increasing the heat exchange area can the low-temperature difference heat exchange be realized and the heat storage and release efficiency be improved, which increases the heat storage cost and reduces the energy storage density; During the heat absorption and release cycle of solid-liquid phase change heat storage materials, there are phenomena such as supercooling, phase separation and uneven material mixing, which reduce the heat storage and release performance of the material and shorten its service life.

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