A kind of solar thermal power generation heat storage material and preparation method thereof

A technology for solar thermal power generation and heat storage materials, which is applied in the directions of heat exchange materials, chemical instruments and methods, and energy input, and can solve the problems of large damage to heat exchange pipelines, affecting system safety, and low thermal efficiency.

Active Publication Date: 2021-06-18
哈工大泰州创新科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with molten salt is that when the temperature is lower than the melting point, the volume change that occurs after the molten salt solidifies will greatly damage the heat exchange pipeline. Therefore, temperature control measures must be taken on the heat transfer pipeline with molten salt, which will increase The operating cost of the power plant and its own power consumption also affect the safety of the system
A German company has made some progress in using traditional concrete materials as heat storage materials, but the thermal efficiency is too low, resulting in bulky volume and high construction costs. Therefore, there is an urgent need for systematic research on the composition, preparation process, structure and performance of concrete heat storage materials. Exploring and preparing high-efficiency, low-cost new heat storage materials has practical significance for the development of solar thermal power generation technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Compounding of molten salt and xerogel:

[0034] In parts by weight, under the condition of 35 ℃, take 80 parts of saturated molten salt solution and 20 parts of polymer used in xerogel in turn, first mix the saturated molten salt solution and the polymer used in xerogel, at a temperature of 35 ℃, under the condition of ultrasonic frequency of 45 kHz, after constant temperature ultrasonic dispersion for 10 min, use a stirrer at 400 r / min, under the condition of 35 ℃, constant temperature stirring and dissolving for 6 h; then refrigerate for 8 h at the temperature of 2 ℃, filter, and collect the filtrate. Then, the obtained filter cake is vacuum-dried to constant weight to obtain a dry filter cake, and then the dried filter cake is transferred into a pulverizer, and then pulverized and passed through an 80-mesh sieve to obtain a molten salt and xerogel complex;

[0035] Pretreatment of Aggregate:

[0036] Add 10% of the aggregate mass of nano-silica to the aggregate, an...

Embodiment 2

[0044] Compounding of molten salt and xerogel:

[0045] In parts by weight, under the condition of 38°C, take 90 parts of saturated molten salt solution and 30 parts of the polymer used in the xerogel in turn, first mix the saturated molten salt solution and the polymer used in the xerogel, at a temperature of 38 ℃, under the condition of ultrasonic frequency of 55kHz, after constant temperature ultrasonic dispersion for 12min, use a stirrer at 500r / min, under the condition of 38℃, constant temperature stirring and dissolving for 7h; then refrigerate at 3℃ for 10h, filter, and collect the filtrate. Then, the obtained filter cake is vacuum-dried to constant weight to obtain a dry filter cake, and then the dried filter cake is transferred into a pulverizer, and after pulverization, it is passed through a 100-mesh sieve to obtain a molten salt and xerogel composite;

[0046] Pretreatment of Aggregate:

[0047]Add nano-silica with 12% of the mass of the aggregate to the aggregate...

Embodiment 3

[0055] Compounding of molten salt and xerogel:

[0056] In parts by weight, under the condition of 40°C, take 100 parts of saturated molten salt solution and 40 parts of polymer used for dry gel in turn, first mix saturated molten salt solution and polymer used for dry gel, ℃, the ultrasonic frequency is 65kHz, after constant temperature ultrasonic dispersion for 15min, use a stirrer at 600r / min, the temperature is 40℃, stir and dissolve at a constant temperature for 8h; then refrigerate at a temperature of 4℃ for 12h, filter, collect and filter Cake, then vacuum-dry the obtained filter cake to constant weight to obtain a dry filter cake, then transfer the dried filter cake to a pulverizer, and pass through a 120-mesh sieve after pulverization to obtain a molten salt and xerogel composite;

[0057] Pretreatment of aggregates:

[0058] Add nano-silica with 15% of the mass of the aggregate to the aggregate, and add zirconia ball milling beads according to the mass ratio of the ...

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PUM

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Abstract

The invention discloses a heat storage material for solar thermal power generation and a preparation method thereof, belonging to the technical field of new energy materials. The product developed by the present invention includes 60-80 parts of cement, 10-20 parts of molten salt and xerogel compound, 0.3-0.5 part of water reducing agent, and 100-200 part of aggregate; the molten salt and xerogel composite In the object, the molten salt is evenly dispersed in the pore structure of the xerogel; the xerogel is any one of polyoxyethylene-propylene oxide block copolymer and polyhydroxyethyl methacrylate. When preparing the molten salt and xerogel composite, first disperse the saturated molten salt solution and the polymer used in the xerogel, stir and dissolve; then refrigerate at 2-4°C for 8-12h, filter, wash, Dried and crushed to obtain molten salt and xerogel complex. The product obtained by the invention can have both the good heat conduction effect of molten salt and the structural stability effect of concrete.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a solar thermal power generation heat storage material and a preparation method thereof. Background technique [0002] In the context of the current energy crisis, solar thermal power generation technology has been favored and valued, and the heat storage system is an indispensable part of the solar thermal power generation system. Because a big disadvantage of solar energy is its instability. For example, in cloudy and rainy environments and at night, that is, when there is no sunlight, the power generation system has to be shut down. In order to improve the working efficiency of the power station, it is required to operate normally during these intermittent times. To meet this requirement, a solar power generation heat storage system has to be introduced. [0003] Heat storage is an important part of solar thermal power generation systems. The performance and cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B22/08C04B24/42C04B24/32C04B24/26C09K5/14
CPCC04B14/06C04B22/08C04B24/2641C04B24/32C04B24/42C04B28/04C04B2111/00008C04B2201/32C09K5/14C04B24/18C04B14/00C04B2103/302Y02P20/129
Inventor 江曙
Owner 哈工大泰州创新科技研究院有限公司
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