Chloride molten salt heat transfer and heat storage material, as well as preparation method and use thereof

A heat storage material, molten salt technology, applied in heat exchange materials, chemical instruments and methods, bulk chemical production, etc. Improve the value of development and utilization, good thermal stability, and the effect of wide operating temperature range

Inactive Publication Date: 2013-06-19
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is NaCl-MgCl 2 , NaCl-MgCl 2 and KCl-NaCl-MgCl 2 and other systems, but due to MgCl 2 There are problems such as dehydration decomposition and high vapor pressure, and it is not suitable for the field of solar high temperature heat utilization

Method used

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  • Chloride molten salt heat transfer and heat storage material, as well as preparation method and use thereof
  • Chloride molten salt heat transfer and heat storage material, as well as preparation method and use thereof
  • Chloride molten salt heat transfer and heat storage material, as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A chloride molten salt heat transfer heat storage material, prepared by the following steps:

[0032] Mix 30wt% sodium chloride and 70wt% calcium chloride and stir evenly, statically heat until the solids are completely melted, then keep warm for 10 to 30 minutes, then naturally cool to room temperature, and mechanically pulverize to obtain chloride molten salt heat transfer storage hot material.

[0033] Using a differential scanner to test the melting point of the chloride molten salt heat transfer and heat storage material prepared in this example, the obtained curve is as follows figure 1 shown. The test results showed that the melting point of the molten salt was 527.39°C.

Embodiment 2

[0035] A chloride molten salt heat transfer heat storage material, prepared by the following steps:

[0036] Mix 31.5wt% sodium chloride and 68.5wt% calcium chloride and stir evenly, statically heat until the solids are completely melted, then keep warm for 10 to 30 minutes, then naturally cool to room temperature, and mechanically pulverize to obtain chloride molten salt heat storage material.

[0037] A differential scanner was used to test the melting point of the chloride molten salt heat transfer and heat storage material prepared in this example. The melting point of the molten salt was measured to be 510.25° C., which was lower than that of Example 1.

Embodiment 3

[0039] A chloride molten salt heat transfer heat storage material, prepared by the following steps:

[0040] Mix 32.7wt% sodium chloride and 67.3wt% calcium chloride and stir evenly, statically heat until the solids are completely melted, then keep warm for 10 to 30 minutes, then naturally cool to room temperature, and mechanically pulverize to obtain chloride molten salt. heat storage material.

[0041] Using a differential scanner to test the melting point of the chloride molten salt heat transfer and heat storage material prepared in this example, the obtained curve is as follows figure 2 shown. The test results showed that the melting point of the molten salt was 500.45°C. All lower than Example 2.

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Abstract

The invention discloses a chloride molten salt heat transfer and heat storage material, as well as a preparation method and a use thereof. The preparation raw materials of the material comprise 20-50% of sodium chloride and 50-80% of calcium chloride. The melting point of the prepared chloride molten salt heat transfer and heat storage material is about 500 DEG C, the upper-limit using temperature can be as high as 800 DEG C, the range of working temperature is wide, the thermal stability is good, and the chloride molten salt heat transfer and heat storage material can be applied to the fields of tower type solar supercritical thermal power generation and condensation solar thermo-chemical utilization; and the material disclosed by the invention can overcome the defect that a molten nitrate salt system can not be applied to the field of solar high-temperature thermal utilization due to low upper-limit using temperature, expand the appications of chlorides to the field of renewable energy and industrial waste heat and improve the development and utilization value of salt lake brine.

Description

technical field [0001] The invention belongs to the field of solar thermal power generation, and in particular relates to a chloride molten salt heat transfer heat storage material and its preparation method and application. Background technique [0002] With the rapid development of the economy and the rapid improvement of people's living standards, energy consumption has also increased sharply, and the problem of energy shortage is very serious. Solar energy is the most abundant, clean, and widely available renewable energy in the world. The efficient use of solar energy will change my country's energy shortage and irrational energy structure, and contribute to ensuring energy supply. [0003] Solar thermal power generation is an important form of solar thermal utilization. Due to the intermittent nature, low energy density and poor stability of solar energy, it is difficult to meet the demand for continuous energy use, and the focused sunlight will generate high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/12
CPCY02P20/54
Inventor 魏小兰彭强丁静杨晓西胡宝华陆建峰王维龙杨建平
Owner SUN YAT SEN UNIV
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