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Cool storage air conditioner

An air-conditioning and cold storage technology, applied in air-conditioning systems, space heating and ventilation, heating methods, etc., can solve the problems of low cold storage density, disappearance of phase change energy storage function of phase change materials, and easy mixing of water, etc., to improve heat storage Effect of cold storage performance, solution to phase separation problem, and excellent thermal conductivity

Inactive Publication Date: 2019-02-01
SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

There are many disadvantages in water cold storage: the cold storage density is low, and the water storage tank is bulky; the water of different temperatures in the cold storage tank is easy to mix, which affects the stored cold capacity in the cold storage tank.
During the crystallization process, small particles are formed in the two-phase region. Due to the action of gravity, they settle and precipitate in the liquid hydrated salt, and form high-density small particles at the bottom. These small particles cannot completely absorb water, so the peritectic process cannot be completed. As a result, phase separation occurs, which will cause the disappearance of the phase change energy storage function of the phase change material

Method used

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Examples

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preparation example Construction

[0039] The preparation method of the phase change material is:

[0040] In the first step, calcium chloride hexahydrate and a small amount of deionized water are added to the reaction vessel, and heated at 75°C for 2-3 hours;

[0041] In the second step, in the reaction vessel of the first step, add hydroxylated carbon nanotubes and porous thin-layer graphene in proportion, stir evenly, place it in the refrigerator for 12 hours, take it out and place it in the air for 20 hours, and obtain the inorganic phase variable material;

[0042]In the third step, paraffin is used to coat the inorganic phase change material. Specifically, the paraffin is added to n-hexane, completely dissolved, and then the phase change material obtained in the second step is added, and stirred at room temperature for 5 hours at a stirring speed of 400 rpm. Then filter and dry the filter cake to obtain the paraffin-coated inorganic phase change material.

[0043] The present invention also provides a c...

Embodiment 1

[0052] Add calcium chloride hexahydrate and a small amount of deionized water into the reaction vessel, and heat at 75°C for 3 hours to obtain a hydrated salt, according to the mass ratio of hydrated salt: hydroxylated carbon nanotubes: porous thin-layer graphene = 1: 1:0.4, further add hydroxylated carbon nanotubes and porous thin-layer graphene to the container for preparing the hydrated salt, stir evenly, place it in the refrigerator for 12 hours, take it out and place it in the air for 20 hours, and obtain an inorganic phase change material. Add paraffin into n-hexane, dissolve completely, then add the inorganic phase change material obtained above, stir at room temperature for 5 hours at a stirring speed of 400 rpm, then filter, and dry the filter cake to obtain a paraffin-coated inorganic phase change material.

Embodiment 2

[0064] Compared with Example 1, hydrated salt: hydroxylated carbon nanotubes: porous thin-layer graphene = 1:1:0.3.

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Abstract

The invention relates to the technical field of air conditioners, in particular to a cool storage air conditioner. The cool storage air conditioner comprises a refrigerating unit, a heat exchange plate, a phase change material cool storage device, a user air-conditioner, a refrigerating pump and a water pump, wherein the phase change material cool storage device carries an air conditioning cool storage phase change material, which comprises hydrated salt, hydroxylated carbon nanotube and a porous thin layer of graphene. By taking full advantages of excellent thermal conductivity, self-lubricating property and high bonding property of graphene itself, graphene is designed to be porous, thereby solving the phase separation problem of a phase change energy storage material and further improving the thermal storage and cool storage performance of the phase change material.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a cold storage air conditioner. Background technique [0002] In order to save energy and reduce consumption, and ease the tension in power supply and the imbalance between power supply and demand, my country has adopted a series of control measures, such as vigorously promoting the peak-valley time-of-use electricity price system. Cold storage air conditioners can realize the "peak shifting and valley filling" of electricity and effectively reduce the capacity of the power grid. It is one of the energy-saving measures vigorously promoted by the country. [0003] At present, there are three main types of air-conditioning cold storage materials: water, ice and phase change materials. Water storage uses the sensible heat of water between 4°C and 7°C for cold storage, and conventional refrigeration units can be used to achieve dual purposes of cold storage and heat storage...

Claims

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Application Information

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IPC IPC(8): C09K5/06F24F5/00
CPCC09K5/06F24F5/0021Y02E60/14
Inventor 陈威周明新
Owner SHANDONG IND TECH RES INST OF ZHEJIANG UNIV
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