A fractal grid metal foam reinforced phase change energy storage system
A grid metal and energy storage system technology, applied in the field of energy storage systems, can solve the problems of low phase conversion thermal phase rate, long charging and discharging time, and unreasonable structure of energy storage blocks, so as to reduce energy loss and strengthen Effect of phase change heat transfer and rapid heat absorption and release
Active Publication Date: 2020-01-03
SOUTHEAST UNIV
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Problems solved by technology
Although the phase change medium commonly used in the energy storage elements currently used has good energy storage capacity, there are still problems such as unreasonable arrangement of the energy storage block and the brine in the equipment, and the unreasonable structure of the energy storage block itself. As a result, the current energy storage equipment still has the problems of low phase conversion heat phase rate and long charging and discharging time.
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[0028] Below in conjunction with accompanying drawing for further description:
[0029] figure 1 The overall schematic diagram of the fractal grid metal foam reinforced phase change energy storage system is given. It is composed of vacuum barrel 1; vacuum barrel cover 2; box body 3; brine 4; energy storage body 5; phase change material 6; main heater 7; auxiliary heater 8; solid powder 9; In order to reduce the loss of heat, the refrigerant inlet and outlet pipes are wrapped with foam plastic insulation materials. The energy storage tank body 3 is placed inside the vacuum barrel, and two holes are reserved on the vacuum barrel cover 2, so as to pass through the inflow pipe and the outflow pipe of the brine 4 conveniently.
[0030] figure 2 A schematic diagram of the internal structure of the energy storage body 5 is given. The energy storage body is a plate-type hollow structure, and many cuboid cavities are separated by cross-shaped metal fins inside. The phase change mat...
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The invention discloses a fractal grid metal foam reinforced phase-change energy storage system which comprises a heat insulation structure, a box body, an energy storage device and a heating device.The heat insulation structure is a vacuum heat insulation shell, the box body is placed in the vacuum heat insulation shell, the top of the box body is provided with a secondary refrigerant input pipeand a secondary refrigerant output pipe, the energy storage device is composed of energy storage bodies and phase-change materials with which the energy storage bodies are filled, the energy storagebodies are arranged on the upper side and the lower side inside the box body, and an S-shaped secondary refrigerant flow pass is formed inside the box body through the energy storage bodies. The energy storage bodies are filled with fractal grid metal foam structures, and the gaps of the fractal grid metal foam structures are filled with phase-change materials. Compared with a traditional energy storage system, the structure is more compact, energy consumption is reduced by adopting a vacuum powder heat insulation method, the heat transfer performance in the energy storage bodies is improved through the fractal structures, and the purposes of energy saving and efficient heat exchange are achieved.
Description
technical field [0001] The invention relates to an energy storage system, in particular to an enhanced phase change energy storage system with a fractal grid metal foam structure designed for strengthening phase change heat and improving energy storage efficiency. Background technique [0002] In most energy application systems, there will be a time mismatch between energy supply and use, and energy storage can alleviate this contradiction between energy supply and demand. Common energy storage methods include sensible heat energy storage, latent heat energy storage, and chemical energy storage. Among them, latent heat energy storage has the advantages of high energy storage density, and the process of absorbing and releasing heat is carried out at isothermal conditions. Therefore, phase change energy storage technology is often used in the field of "peak shifting and valley filling" of electric power. [0003] The liquid phase change energy storage heat exchanger is curre...
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IPC IPC(8): F24H7/00F24H9/18F28D20/02F28F21/08
CPCF24H7/002F24H9/18F28D20/021F28F21/081Y02E60/14
Inventor 张程宾李杰陈永平
Owner SOUTHEAST UNIV