CN201129951Y - Overall solidification phase change material heat storage device - Google Patents

Abstract

The overall solidified phase change material heat storage device described in the utility model includes a heat storage tank, a heat transfer tube is installed in the heat storage tank, a heat transfer fluid is installed in the heat transfer tube, and the inlet and outlet of the heat transfer tube are connected to the outside, and the heat transfer tube is connected to the outside. A phase change material is filled between the heat pipe and the shell of the heat storage tank, and the heat storage tank is connected with a vibration source.

Description

Overall solidification phase change material heat storage device

(1) Technical field

The utility model relates to the technical field of energy storage and effective utilization, in particular to a heat storage device using a phase change material (PCM).

(2) Background technology

Phase change latent heat storage, as a technology that can effectively relieve peak and valley electric loads and improve energy utilization efficiency, has been widely used in foreign developed countries. Since my country began to implement the peak-valley time-of-use electricity price policy in 1994, the research and application of phase change heat storage technology in civil and industrial fields has made great progress. With the implementation of the national energy conservation and emission reduction strategy, the application prospect of heat storage technology is very broad.

There are many types of phase change heat storage materials, which can be divided into inorganic phase change materials and organic phase change materials according to the chemical composition of the materials. Inorganic phase change materials include water, crystalline hydrated salts, molten salts, and the like. Organic phase change materials such as sugars, organic acids, etc. However, these phase change materials generally have the problem of overcooling during the phase change process, that is, when the temperature of the material is lower than a certain value of the phase change temperature, the phase change will absorb or release heat, which will reduce the energy utilization efficiency. Many researchers use various methods to reduce the supercooling of the solution. It has been reported that high-frequency ultrasonic irradiation is used to reduce the supercooling of the phase change, but this method consumes a lot of energy and has a high cost for industrial applications; it has also been reported that in phase change materials Add solid nucleating agents such as AgI, borax, etc. to reduce the degree of phase transition supercooling, but the disadvantage of this method is that solid substances will precipitate in the solution, so the corresponding effect cannot be achieved.

(3) Contents of the invention

The utility model aims to solve the technical problems that the existing phase change heat storage equipment has a large degree of supercooling and a slow phase change speed in the phase change process, and provides an integral solidification type phase change system with a small degree of supercooling and a fast phase change speed in the phase change process. Change material heat storage device to improve energy utilization.

The overall solidified phase-change material heat storage device described in the utility model includes a heat storage tank, a heat transfer tube is installed in the heat storage tank, a heat transfer fluid is installed in the heat transfer tube, and the inlet and outlet of the heat transfer tube are connected to the outside. The phase change material is filled between the heat pipe and the shell of the heat storage tank, and the feature is that the heat storage tank is connected with a vibration source.

Further, the vibration frequency of the vibration source is 10-300 Hz.

The heat transfer tube arranged in the heat storage tank is connected with the heat storage tank through a bracket or a head to transmit vibration to the heat transfer tube.

The phase change material is water or aqueous solution or inorganic salt or organic matter. The heat transfer fluid is water or aqueous solution or heat transfer oil.

The heat storage tank as a whole is elastically connected to the base with anchor bolts.

When low-temperature phase change materials with a phase transition temperature of -30 to 45°C are used, the heat storage tank and heat transfer tubes are made of polyethylene or metal; when high-temperature phase change materials with a phase transition temperature above 60°C are used, the heat storage tank and heat transfer Heat pipe material is metal.

The frequency of the vibrating motor of the vibrator is 10-300Hz, generally based on the power frequency, and can be adjusted by a frequency regulator as needed. Generally, the power of the vibrating motor for the heat storage tank below ^1m3 can be 0.5-1kW, and the power of the ^1-3m3 heat storage tank The motor power can be 0.5-3kW, and the motor power of the heat storage tank above 3m ³ can be above 3kW. The working time of the vibrator can be set according to the time required for the phase change.

Under the action of the vibration source, the heat storage tank drives the heat transfer tube to vibrate, which strengthens the heat transfer between the phase change material and the heat transfer wall surface, reduces the degree of supercooling, and thus accelerates the phase change speed of the phase change material in the heat storage tank .

The vibration source is rigidly connected to the heat storage tank, and the vibrator can be arranged at the bottom of the heat storage tank or at other parts of the heat storage tank to connect with the tank body.

Compared with the prior art, the utility model has the advantages of: adopting the technology adopted in the utility model can reduce the phase change supercooling degree in the heat storage process, speed up the phase change time by 20-30%, and improve the energy utilization rate by about 10-30%. 20%, thus saving operating costs.

(4) Description of drawings

Fig. 1 is the structural representation of an embodiment of the utility model,

Fig. 2 is the structural representation of another embodiment of the utility model,

(5) Specific implementation methods

Embodiment one

Referring to Fig. 1, in which: 1 heat storage tank support frame; 2 heat transfer fluid inlet; 3 heat storage chamber bottom plate; 4 heat transfer fluid coil; 5 heat transfer fluid outlet; 6 phase change heat storage material inlet; plate; 8 phase-change heat storage material outlets; 9 vibration motors.

The integrally solidified phase change material heat storage device described in the utility model includes a heat storage tank arranged on a support frame 1 of a heat storage tank, a coil 4 is installed in the heat storage tank as a heat transfer tube, and a heat transfer tube is installed in the heat transfer tube. Thermal fluid, the inlet 2 and outlet 5 of the heat transfer tube are connected to the outside, the phase change material is filled between the heat transfer tube and the heat storage tank shell, the bottom sealing plate of the heat storage chamber 3, the phase change heat storage material inlet 6, the phase change The heat storage material outlet 8, the coil support plate 7, and the heat storage tank are equipped with a vibration motor 9 as a vibration source.

The vibration frequency of the vibration motor 9 is 10-300 Hz.

The coil pipe 4 arranged in the heat storage tank is connected with the heat storage tank through a bracket or a head, so as to transmit vibration to the coil pipe.

The phase change material is water or aqueous solution or inorganic salt or organic matter. The heat transfer fluid is water or aqueous solution or heat transfer oil.

The heat storage tank as a whole is elastically connected to the base with anchor bolts.

When low-temperature phase change materials with a phase transition temperature of -30 to 45°C are used, the heat storage tank and heat transfer tubes are made of polyethylene or metal; when high-temperature phase change materials with a phase transition temperature above 60°C are used, the heat storage tank and heat transfer Heat pipe material is metal.

The frequency of the vibration motor of the vibration source is 10-300Hz, generally based on power frequency, and can be adjusted by a frequency regulator as needed. Generally, the power of the vibration motor for the heat storage tank below 1m ³ can be 0.5-1kW, 1-3m ³ heat storage tank The motor power can be 0.5-3kW, and the motor power of the heat storage tank above 3m ³ can be above 3kW. The working time of vibrating motor 9 can be set according to the time of phase change required time.

Under the action of the vibration motor 9, the heat storage tank drives the coil 4 to vibrate, which strengthens the heat transfer between the phase change material and the heat transfer wall surface, reduces the degree of supercooling, and thus promotes the phase change of the phase change material in the heat storage tank speed.

The vibration motor 9 is rigidly connected to the heat storage tank, and the vibration motor 9 can be arranged at the bottom of the heat storage tank, or at other parts of the heat storage tank to connect with the tank body.

Embodiment two

Referring to Fig. 2, in which: 1 heat storage tank support frame; 2 heat transfer fluid inlet; 3 heat storage chamber bottom plate; 41 heat transfer fluid pipe; 5 heat transfer fluid outlet; Sealing plate; 8 outlets for phase change heat storage materials; 9 vibration motors.

Compared with Embodiment 1, this embodiment changes the form of the heat transfer fluid pipe, and no longer uses a coil pipe, but uses a straight pipe heat transfer fluid pipe 41, and the upper end of the heat transfer fluid pipe 41 is connected to the top seal plate 71 of the heat storage chamber , the lower end is connected to the bottom plate 3 of the heat storage chamber.

All the other structures are the same as in Embodiment 1.

This embodiment is only for illustrating the technical scheme of the present utility model, rather than limiting the scope of protection of the present utility model, those of ordinary skill in the art can also make various changes without departing from the scope of the present utility model , all equivalent technical solutions also belong to the scope of the utility model, and the protection scope of the utility model should be defined by the claims.

Claims (5)

1. The overall solidified phase-change material heat storage device includes a heat storage tank, a heat transfer tube is installed in the heat storage tank, a heat transfer fluid is installed in the heat transfer tube, the inlet and outlet of the heat transfer tube are connected to the outside, and the heat transfer tube and the storage Phase-change materials are filled between the shells of the heat storage tank, and the feature is that the heat storage tank is connected with a vibration source. 2. The integrally solidified phase change material heat storage device according to claim 1, characterized in that: the vibration frequency of the vibration source is 10-300 Hz. 3.. The integrally solidified phase-change material heat storage device according to claim 1 or 2, characterized in that: the heat transfer tube installed in the heat storage tank is connected to the heat storage tank through a bracket or a head, so as to The vibration is transmitted to the heat transfer tube. 4.. The integrally solidified phase change material heat storage device according to claim 3, characterized in that: the phase change material is water or an aqueous solution or inorganic salt or organic matter, and the heat transfer fluid is water or an aqueous solution or heat transfer oil. 5.. The integrally solidified phase change material heat storage device according to claim 4, characterized in that: the whole heat storage tank and the base are elastically connected by anchor bolts.

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