Heat reservoir based on phase-change material and movable heat storage device provided with heat reservoir

A technology of phase change materials and heat storage devices, which is applied in the direction of heat exchangers, indirect heat exchangers, heat storage equipment, etc., can solve the difficulties of recovery of phase change separation heat storage devices, troublesome installation or disassembly of heat storage devices, hydrogen Barium oxide has high toxicity and other problems, so as to avoid excessive heat loss, good heat insulation effect, and good heat preservation effect

Pending Publication Date: 2017-06-13
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It has been proposed to use barium hydroxide as a phase-change heat storage medium, but barium hydroxide has problems such as high toxicity, supercooling, poor cycle stability, phase change separation, and difficulty in recycling after the heat storage device is scrapped.
[0008] In addition, the above-mentioned prior art also has the disadvantages of troublesome installation or disassembly of the heat storage device and inflexible operation.

Method used

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  • Heat reservoir based on phase-change material and movable heat storage device provided with heat reservoir
  • Heat reservoir based on phase-change material and movable heat storage device provided with heat reservoir
  • Heat reservoir based on phase-change material and movable heat storage device provided with heat reservoir

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0086] Manufacture Example 1 Manufacture of heat exchangers with different structures

[0087] Design and manufacture respectively as figure 1 , 2 Three kinds of heat exchangers of the coil tube, the return tube and the spiral plate of the heat storage shown in 3, they have the following structural parameters:

[0088] Table 1: Structural parameters of three heat exchangers

[0089]

[0090] The heat exchanger described above was tested using a thermally conductive phase change material. The performance parameters of the material are as follows: the phase transition point is 120°C; the latent heat of phase transition is 250kJ / kg; the thermal conductivity at room temperature is 5W / mK; the density is 1000kg / m 3 ; Specific heat at constant pressure is 2kJ / kgK.

[0091] It is found through experiments that the heat storage performance of the spiral tube heat exchanger or the spiral plate heat exchanger is relatively better, and the phase change material in the heat storage ...

Embodiment 1

[0102] The exhaust gas temperature of a thermal power plant boiler is 220-250°C, the pressure is 0.6MPa, and the flow rate is 8000m 3 / h~9000m 3 / h. The heat exchanger of the mobile energy storage device of the present invention has a spiral plate structure, and erythritol with a melting point of 120°C is selected as the phase change material, and expanded graphite is used as the thermally conductive filler, and the thermally conductive phase change material is composed of erythritol and thermally conductive filler. Formed, the mass percentage of the thermally conductive filler in the thermally conductive phase change material is 10%, the phase change latent heat of the thermally conductive phase change material is 250kJ / kg, and the thermal conductivity is (10W / m·K); the shell sandwich structure contains The insulation material is airgel insulation material, and the thickness of the sandwich structure is 30mm. Using the mobile heat storage device of the present invention, th...

Embodiment 2-6

[0104] Except the content shown in the following table, it carried out in the same manner as Example 1.

[0105]

[0106]

[0107] It can be seen from the results in the table that the mobile heat storage device of the present invention has high heat storage efficiency and low heat transportation loss.

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Abstract

The invention relates to a heat reservoir based on a phase-change material and a movable heat storage device provided with the heat reservoir. The heat reservoir comprises a shell, a heat-conducting phase-change material charged into the shell and a heat exchanger. The heat exchanger is located in the shell and comprises a heating fluid pipeline. The invention further relates to the movable storage device comprising the heat reservoir and a transporting unit. A large amount of the high-performance phase-change material is charged in the heat reservoir and serves as a heat storage medium, heat transmission, instead of medium transmission, between a heat source side and a client side is achieved, and the heat storage performance is remarkably superior to that of a movable heat storage device with water at the heat source side serving as the medium or a movable heat storage device filled with a small amount of the phase-change material; the heat reservoir further comprises a heated fluid pipeline independent of the heating fluid pipeline, and the heated fluid pipeline can be used for waste heat recovery of unclean high-temperature flow without pollution to such as a tap water pipeline after long-term use; and a selectable control system provided by the invention can achieve real-time monitoring and background monitoring.

Description

technical field [0001] The invention belongs to the field of energy-saving heat supply, and in particular relates to a heat storage device based on a phase change material and a mobile heat storage device including the heat storage device. Background technique [0002] Currently, energy issues and the resulting environmental issues have become a major challenge to human existence. At present, the energy consumption of my country's industrial production process is much higher than that of developed countries. One of the main reasons is that the waste heat and waste heat discharged cannot be recycled reasonably. In China, the thermal efficiency of industrial furnaces is relatively low, and 40% to 60% of the heat is taken away by high-temperature flue gas and high-temperature slag. Recycling waste heat and reducing energy consumption are of great practical significance to my country's energy-saving, emission reduction, and environmental protection development strategies. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D20/02
CPCF28D20/023Y02E60/14
Inventor 金兆国张靖驰党广洲张雅倩刘斌张天翔雷雨
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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