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Ultrasonic field setting method used for efficiently preparing ice slurry

A technology of ultrasonic field and ultrasonic method, applied in ice making, ice making, application, etc., can solve problems such as insufficient promotion of nucleation, hindrance of re-melting of nucleated ice crystal particles, strong thermal effect, etc., to improve flow and heat transfer performance , refine the size of ice crystal particles, and ensure the stability of the effect

Inactive Publication Date: 2021-06-29
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the irradiation time is too short, it may not be enough to promote nucleation; if the irradiation time is too long, it will cause a strong thermal effect and hinder the occurrence of nucleation or melt the generated ice crystal particles again

Method used

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  • Ultrasonic field setting method used for efficiently preparing ice slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Prepare a 3 wt% sodium chloride solution with a volume of 10 mL. Use the device shown in the attached figure to prepare ice slurry: use platinum resistance for temperature monitoring in order to control the application of ultrasound and judge the occurrence of nucleation. When the temperature of the sodium chloride solution drops to -2.8°C (the supercooling degree is 1°C ), the solution was first irradiated with an ultrasonic frequency of 40 kHz and a power of 15 W for 2 s, and then irradiated with an ultrasonic power of 40 W for 3 s. The time taken for the ultrasonic application to nucleation phenomenon to occur is the nucleation time, and the experiment was repeated for 20 groups. The results show that after the application of ultrasound, the sodium chloride solution can rapidly crystallize at a supercooling degree of 1°C. The field can significantly reduce the undercooling required for nucleation; in 20 repeated experiments, the probability of freezing of the soluti...

Embodiment 2

[0041]Prepare a 3 wt% sodium chloride solution with a volume of 10 mL. Use the device shown in the attached figure to prepare ice slurry: use platinum resistance for temperature monitoring in order to control the application of ultrasound and judge the occurrence of nucleation. When the temperature of the sodium chloride solution drops to -2.8°C (the supercooling degree is 1°C ), the solution was first irradiated with an ultrasonic frequency of 33 kHz and a power of 20 W for 2 s, and then irradiated with an ultrasonic power of 50 W for 2 s. The time taken for the ultrasonic application to nucleation phenomenon to occur is the nucleation time, and the experiment was repeated for 20 groups. The results show that after the application of ultrasound, the sodium chloride solution can rapidly crystallize at a supercooling degree of 1°C. The field can significantly reduce the undercooling required for nucleation; in 20 repeated experiments, the probability of freezing of the solutio...

Embodiment 3

[0043] Prepare a 3 wt% sodium chloride solution with a volume of 10 mL. Use the device shown in the attached figure to prepare ice slurry: use platinum resistance for temperature monitoring in order to control the application of ultrasound and judge the occurrence of nucleation. When the temperature of the sodium chloride solution drops to -2.8°C (the supercooling degree is 1°C ), the solution was first irradiated with an ultrasonic frequency of 28 kHz and a power of 50 W for 1 s, and then irradiated with an ultrasonic power of 25 W for 3 s. The time taken for the ultrasonic application to nucleation phenomenon to occur is the nucleation time, and the experiment was repeated for 20 groups. The results show that after the application of ultrasound, the sodium chloride solution can rapidly crystallize at a supercooling degree of 1°C. The field can significantly reduce the undercooling required for nucleation; in 20 repeated experiments, the probability of freezing of the soluti...

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Abstract

The invention provides an ultrasonic field setting method used for efficiently preparing ice slurry. According to the ultrasonic field setting method, a solution used for preparing the ice slurry is put into a container, the temperature of the solution to reach a supercooled state, and then irradiating is carried out on the solution with different powers for multiple times by using ultrasonic waves with the same frequency, so that the solution generates the ice slurry. The invention provides the method for promoting crystallization of the supercooled solution through an ultrasonic field, the reasonable ultrasonic field is arranged, so that the water solution rapidly generates ice crystals at the low supercooling degree, the energy consumption of a supercooler is reduced, and the problem of ice blockage caused by incomplete crystallization and overlarge generated ice crystal particles is avoided.

Description

technical field [0001] The invention relates to the technical field of ice slurry production by supercooled water method, in particular to an ultrasonic field setting method for efficiently producing ice slurry. Background technique [0002] As a safe, recyclable and efficient heat exchange medium, ice slurry is widely used in cold storage, cold storage, food pre-cooling and preservation, clinical medicine, instrument cooling and cleaning, liquid grinding and other fields. In recent years, the ice storage technology, which uses the low-voltage period of the power grid to produce ice slurry and then releases its cooling capacity to the cooling area of ​​the building during the high-voltage period of the power grid, has been proved to be an effective method to relieve the pressure on the power grid. How to efficiently produce ice slurry is the basis for the large-scale engineering application of this technology. [0003] The supercooled water ice making technology is to use t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25C1/00
CPCF25C1/00F25C2301/002F25C2600/04
Inventor 刘曦李月玲俞凯鸿李学来
Owner FUZHOU UNIV