Novel cascade combined type mixed phase change heat storage device, phase change heat storage material and preparation method of phase change heat storage rod

A phase-change heat storage and combined technology, which is applied to heat storage equipment, lighting and heating equipment, heat exchanger types, etc. The effect of reducing thermodynamic loss, improving utilization efficiency, and increasing heat storage density

Pending Publication Date: 2019-04-16
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When water is used as the heat storage medium, when the heat storage capacity is large, the size of the heat storage device will be larger, the floor area will increase, and the practicability will decrease, and the capacity and heat storage and release rate of the heat storage device can affect the solar heat utilization system. The overall efficiency of the heat storage device, therefore, the capacity of the heat storage device and the rate of heat storage and discharge become particularly critical

Method used

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  • Novel cascade combined type mixed phase change heat storage device, phase change heat storage material and preparation method of phase change heat storage rod
  • Novel cascade combined type mixed phase change heat storage device, phase change heat storage material and preparation method of phase change heat storage rod
  • Novel cascade combined type mixed phase change heat storage device, phase change heat storage material and preparation method of phase change heat storage rod

Examples

Experimental program
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Effect test

preparation example Construction

[0042] The preparation method of the phase-change heat storage rod used in this embodiment includes manufacturing a cylindrical shell, preparing a phase-change heat-storage material, filling the phase-change heat-storage material, and sealing the cylindrical shell, and the specific steps are as follows:

[0043] 1) Manufacture of cylindrical housing

[0044] 2) Preparation of phase change heat storage materials

[0045] ①According to formula (1), calculate and determine the mass percentage of myristic acid, lauric acid and capric acid: myristic acid: lauric acid: capric acid = 1:1:1, and then calculate myristic acid, lauric acid, capric acid and The mass of expanded graphite, then separately weighed myristic acid, lauric acid, capric acid and expandable graphite;

[0046] The quality basis conditions for the calculation of myristic acid, lauric acid, capric acid and expanded graphite are: the volume of the cylindrical shell; the mass percentages of myristic acid, lauric acid ...

Embodiment 2

[0057] Example 2, this example is basically the same as Example 1, the difference is that the composition ratio of the phase change heat storage material used in this example and the process parameters of the phase change heat storage rod preparation process are different, as follows:

[0058] The phase-change heat storage material used in this embodiment includes myristic acid, lauric acid, capric acid and expanded graphite. The myristic acid, lauric acid and capric acid are adsorbed respectively and completely filled in the voids of the expanded graphite. , the mass percent of myristic acid and expanded graphite, the mass percent of lauric acid and expanded graphite, and the mass percent of capric acid and expanded graphite are all 9:1, and the mass percent of described myristic acid, lauric acid and capric acid is based on the formula (1) The calculation is determined as, myristic acid: lauric acid: capric acid = 1: 1.5: 2,

[0059]

[0060] In the formula: T myristic ac...

Embodiment 3

[0074] Example 3, this example is basically the same as Example 1, the difference is that the composition ratio of the phase change heat storage material used in this example and the process parameters of the phase change heat storage rod preparation process are different, as follows:

[0075] The phase-change heat storage material used in this embodiment includes myristic acid, lauric acid, capric acid and expanded graphite. The myristic acid, lauric acid and capric acid are adsorbed respectively and completely filled in the voids of the expanded graphite. , the mass percent of myristic acid and expanded graphite, the mass percent of lauric acid and expanded graphite, and the mass percent of capric acid and expanded graphite are all 8.5:1.5, the mass percent of described myristic acid, lauric acid and capric acid are according to the formula (1) Calculated and determined, myristic acid: lauric acid: capric acid = 1:1:1

[0076]

[0077] In the formula: T myristic acid m，1...

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Abstract

The invention discloses a novel cascade combined type mixed phase change heat storage device, a phase change heat storage material and a preparation method of a phase change heat storage rod. The novel cascade combined type mixed phase change heat storage device comprises a shell. The novel cascade combined type mixed phase change heat storage device is characterized in that the novel cascade combined type mixed phase change heat storage device further comprises an upper water distributor, a lower water distributor and a heat storage unit, the upper water distributor is arranged in the shell and below a heat storage inlet and a heat taking inlet and is fixedly connected with the heat storage inlet and the heat taking inlet, the lower water distributor is arranged in the shell and above a heat storage outlet and a heat taking outlet and is fixedly connected with the heat storage outlet and the heat taking outlet, and the heat storage unit is perpendicularly arranged and connected between the upper water distributor and the lower water distributor. The phase change heat storage material comprises myristic acid, lauric acid, decanoic acid and expanded graphite. The preparation methodof the phase change heat storage rod comprises cylindrical shell preparing, phase change heat storage material preparing, phase change heat storage material filling and cylindrical shell sealing.

Description

technical field [0001] The invention belongs to the utilization of thermal energy, particularly relates to the utilization of low-temperature heat of solar energy, and is a novel cascade combined hybrid phase-change heat storage device, a phase-change heat-storage material and a preparation method of a phase-change heat-storage rod. Background technique [0002] The use of solar energy is affected by factors such as weather, which is intermittent and unstable, resulting in a contradiction between energy supply and demand. Thermal storage devices can solve this problem very well. The main function of the heat storage device is to store the heat collected by the solar collector for reuse, so as to meet the user's long-term hot water demand. As a common medium for heat storage, water has a wide range of sources, is easy to use, clean and pollution-free. When using water as the heat storage medium, when the heat storage is large, the size of the heat storage device is larger, t...

Claims

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Application Information

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IPC IPC(8): F28D20/02
CPCF28D20/02F28D20/028Y02E60/14
Inventor 高龙孙佰仲车德勇赵辰辰于琦格根塔娜刘钟泽刘德浩
Owner NORTHEAST DIANLI UNIVERSITY
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