CN110513757A - A phase change heat storage heating device - Google Patents

Abstract

The invention relates to a phase-change heat storage heating device, comprising a heat preservation pipe for circulating air to circulate and flow, a fan, a heat generating box, a heat storage box and a heat exchange box arranged on the heat preservation pipe. A ceramic phase change heat storage module is arranged in the heat box to store or release the heat generated in the heat-generating box. Along the flow direction of the circulating air, the heat-generating box, the heat-storage box and the heat-exchange box The bodies are sequentially installed on the insulation pipes. Compared with the prior art, the present invention has the advantages of simple assembly, convenient maintenance, high heat transfer efficiency, low cost, low investment, small footprint, efficient and stable provision of thermal energy, and has good economic and social benefits.

Description

A phase change heat storage heating device

technical field

The invention relates to the field of phase change heat storage and energy saving, in particular to a phase change heat storage heating device.

Background technique

Today's world consumes a lot of energy, and problems such as resource depletion and environmental pollution always remind us to pay attention to energy conservation. Countries have turned their research directions to the development of new energy sources, such as wind energy and solar energy, but there are problems in utilization, intermittent The biggest problem is the stability and instability, which reduces the utilization efficiency. How to make it into a stable energy output is the focus of its research. At present, the application of new energy is mainly in the direction of power generation. In the process of power generation, some unstable thermal energy will be generated. It is very considerable if these thermal energy can be collected and utilized. The collected heat can be used to heat some industrial, business and domestic water, such as heating water.

At present, the heating method of the hot water supply equipment in most factories and the heating system in the northern winter are based on coal as the main energy source. my country's coal reserves are large, but the demand for coal is also increasing year by year. Coal is a non-renewable resource, and such consumption will face a very embarrassing situation in the future; and coal contains a large amount of sulfur and nitrogen, and a large amount of sulfur and nitrogen will be produced during the combustion process. Sulfur dioxide and nitrogen oxides, which are the main sources of acid rain, also produce carbon dioxide, dust and other substances, causing great harm to the environment.

The common problem of the existing thermal storage system is that the thermal storage temperature is not high. The main reason is that the selection of the thermal storage medium limits the thermal storage temperature. At present, the thermal storage system is mostly in direct contact between the heat exchanger and the thermal storage material, such as oil. The working method of the heater is to install the electric heating tube in the cavity, and fill the heat conduction oil around the heat conduction tube in the cavity. After the power is turned on, the heat conduction oil is heated and then the pipeline is heated. However, the problem is that the preheating time is long and the thermal conductivity is low, resulting in a large amount of energy being wasted and the required temperature cannot be reached, and there is no insulation measure after use, which will cause most of the heat to be lost and wasted. If the thermal oil leaks accidentally, there will still be Great safety hazard. There are also some inorganic molten salts for the heat transfer working fluid of the heat storage system. Although the heat transfer performance is guaranteed, a big problem of the inorganic molten salt is that when the heat transfer working fluid is in contact with the heat exchange pipeline, due to its corrosion Strong resistance, it will cause damage to the pipeline and pollute the water body.

To sum up, in view of the defects of the existing devices and technologies, a new type of phase change heat storage heating device is particularly required to solve the existing problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a phase-change thermal storage heating device with functions of heating, thermal storage and hot water supply in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

A phase-change heat storage heating device, comprising a heat preservation pipe for circulating air to circulate, a fan, a heat generation box, a heat storage box and a heat exchange box arranged on the heat preservation pipe, the heat storage box There is a ceramic phase-change heat storage module that stores or releases the heat generated in the heat-generating box. Along the flow direction of the circulating air, the heat-generating box, the heat-storage box and the heat-exchange box are installed in sequence. on the insulated pipe.

A first valve is arranged between the heat generating box and the heat storage box, and a second valve is arranged between the heat storage box and the heat exchange box.

By designing the first valve and the second valve, the device is divided into three parts: a heat generating box, a heat storage box and a heat exchange box, each of which works independently; the electric heater in the heat generating box converts electrical energy into heat energy for transmission In the heat storage box, the ceramic phase change heat storage module stores and releases the obtained energy, and finally transfers it stably to the heat exchanger in the heat exchange box to heat the incoming water. During the whole process, the heated water does not come into contact with the heat storage material, which can effectively avoid pollution problems. Moreover, the valve control system is set to work, which can well preserve the residual heat for later use, which is efficient and environmentally friendly.

When the phase change thermal storage heating device is in an operating state, the first valve and the second valve are in an open state; when the phase change thermal storage heating device is in a closed state, the first valve and the second valve are in an open state. is closed.

The ceramic phase-change heat storage module includes ceramic phase-change heat-storage materials, and an air duct provided between the ceramic phase-change heat-storage materials for circulating the circulating air.

The ceramic phase change heat storage material is prepared by mixing the ceramic material and the phase change heat storage material.

The phase transition temperature of the ceramic phase change heat storage material is 300-800°C.

The wall thickness of the ceramic phase change heat storage material is 0.5-2.0 mm, and the porosity is 65-75%, preferably 70%.

The phase change material in the device of the present invention selects a ceramic phase change heat storage material. Compared with ordinary phase change materials, this material has the advantages of high heat storage and release density, fast heat storage and release speed, and good resistance to rapid cooling and rapid heating. , long service life and other advantages, its phase transition temperature can reach 800 ℃, which can improve the thermal storage temperature of the thermal storage system.

At the same time, air is used as the heat transfer medium, which is non-corrosive and has high safety performance.

The heat generating box is provided with an electric heater, which converts electric energy into heat energy and heats the circulating air.

The heat exchange box is provided with a heat exchanger, and the circulating air heated by the heat storage box heats the heating medium through the heat exchanger to achieve heating to the outside world.

The heating medium is water.

The working process of the present invention is:

The air is transported to the heat-generating box by the fan, and the circulating air is heated by the electric heater in the heat-generating box, and then the circulating air enters the heat-storage box to transfer the heat to the phase-change material of the ceramic phase-change heat-storage module. , carry out heat storage, when the ceramic phase change heat storage module completes heat storage, the electric heater stops working to complete the heat storage process.

The heat protection process is that the ceramic phase change heat storage module releases its own latent heat to heat the circulating air, the circulating air enters the heat exchanger in the heat exchange box, and exchanges heat with the water medium in the heat exchanger. The fan returns the circulating air to the heat generating box.

Compared with the prior art, the present invention has the following advantages:

(1) The phase change heat storage heating device of the present invention separates the heater, the heat storage material and the heat exchanger and works independently, which can effectively prevent the heat storage material from corroding the heat exchanger pipeline and improve the service life of the device .

(2) The phase change heat storage heating device of the present invention can store discontinuous and unstable electrical energy in the new ceramic phase change heat storage material in the form of latent heat of phase change, and the heat storage per unit volume is more than that of sensible heat.

(3) In the phase change heat storage heating device of the present invention, the ceramic phase change heat storage module can be directly fixed and installed in the device, and the modular installation is convenient for the transportation, installation and maintenance of the whole device, which is simple and easy to operate.

(4) In the phase-change thermal storage heating device of the present invention, the thermal storage material uses a new ceramic phase-change thermal storage material made of a mixture of ceramic materials and phase-change thermal storage materials, rather than traditional heat-conducting oil, inorganic molten salt, etc. Material. Such phase-change heat storage materials use the change of phase state to store and release heat, and the heat storage and release process is similar to an isothermal process.

Description of drawings

Fig. 1 is the structural representation of the present invention;

2 is a schematic structural diagram of a ceramic phase change heat storage module in the present invention;

In the figure, 1 is an insulation pipe, 2 is a heat generating box, 3 is a heat storage box, 4 is a heat exchange box, 5 is an electric heater, 6 is a ceramic phase change heat storage module, 7 is a heat exchanger, 8-1 is the first valve, 8-2 is the second valve, 9 is the fan, 10 is the water inlet pipe, and 11 is the water outlet pipe.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example

A phase change heat storage heating device, as shown in Figure 1, includes a heat preservation pipe 1 for circulating air to circulate, a fan 9 arranged on the heat preservation pipe 1, and a production line connected by pipes in sequence along the flow direction of the circulating air. The heat box 2 , the heat storage box 3 and the heat exchange box 4 , wherein the heat generation box 2 and the heat exchange box 4 are connected to the outer air duct of the thermal insulation pipe 1 . A first valve 8-1 is arranged between the heat generating box 2 and the heat storage box 3, and a second valve 8-2 is arranged between the heat storage box 3 and the heat exchange box 4; through the first valve 8- 1 and the second valve 8-2 will sequentially divide the heat generating box 2, the heat storage box 3, and the heat exchange box 4 into three sections, and each section works independently.

The heat generating box 2 is provided with an electric heater 5, which converts electric energy into heat energy and heats the circulating air. The thermal storage box 3 is provided with a ceramic phase-change thermal storage module 6 that stores or releases the heat generated in the heat-generating box 2. As shown in FIG. 2, the ceramic phase-change thermal storage module 6 includes a ceramic phase-change thermal storage material , and an air duct for circulating air between the ceramic phase change heat storage materials, the wall thickness of the ceramic phase change heat storage material is between 0.5mm, and the porosity is about 70%; among them, the ceramic phase change heat storage material The material is prepared by mixing a ceramic material with a phase change heat storage material, and the phase change temperature of the ceramic phase change heat storage material is 800°C. The heat exchange box 4 is provided with a heat exchanger 7, and the circulating air heated by the heat storage box 3 heats the heating medium through the heat exchanger 7 to achieve heating to the outside world; in this embodiment, the heating medium is water; the heat exchanger 7 There is a water inlet pipe 10 and a water outlet pipe 11 for the inflow and outflow of water supply. The device of this embodiment controls the device through the first valve 8-1 and the second valve 8-2. When the device is working, the first valve 8-1 and the second valve 8-2 are opened, and when the system stops working, the first valve 8-1 and the second valve 8-2 are closed. The first valve 8-1 and the second valve 8-2 can effectively protect the thermal energy in the device and save energy; such repetition can realize the regulation of the heat storage and release process, and realize the effective conversion between electric energy and thermal energy.

The working process of the device of this embodiment is:

When the device runs the heat storage function, the circulating air enters the heat generating box 2, and after being heated by the electric heater 5, the hot air enters the heat storage box 3, and transfers the heat carried by itself to the ceramic phase change heat storage module 6, wherein the The phase change heat storage material stores heat through its own phase change. When the ceramic phase change heat storage module 6 completes the heat storage function, the electric heater 5 stops working.

When the device operates the heat release function, the ceramic phase change heat storage module 6 releases the accumulated latent heat through the phase change to heat the air, and the hot air enters the heat exchange box 4 to heat the incoming water through the heat exchanger 7 .

Compared with the existing widely used heating devices, a new type of ceramic phase change heat storage heating device proposed in this embodiment has the advantages of simple assembly, convenient maintenance, high heat transfer efficiency, low cost, low investment and small footprint. It can efficiently and stably provide the advantages of thermal energy, and its popularization and application will surely obtain good economic and social benefits.

Example 2

The main structure of this embodiment is the same as the main structure in Embodiment 1, the difference lies in the specific parameters of the ceramic phase change heat storage module 6, wherein the wall thickness of the ceramic phase change heat storage material is between 2.0mm and the porosity is about is 65%; wherein, the ceramic phase change heat storage material is prepared by mixing ceramic material and phase change heat storage material, and the phase change temperature of the ceramic phase change heat storage material is 300°C.

Example 3

The main structure of this embodiment is the same as the main structure in Embodiment 1, the difference lies in the specific parameters of the ceramic phase change heat storage module 6, wherein the wall thickness of the ceramic phase change heat storage material is between 1.0mm and the porosity is about 1.0 mm. is 75%; wherein, the ceramic phase change heat storage material is prepared by mixing ceramic material and phase change heat storage material, and the phase change temperature of the ceramic phase change heat storage material is 800°C.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention.

Claims (10)

1. A phase-change heat storage heating device, comprising an insulation pipe (1) for circulating air to circulate, and a fan (9), a heat-generating box (2), a heat storage box (2), a fan (9) arranged on the insulation pipe (1) The heat box (3) and the heat exchange box (4) are characterized in that, The thermal storage box (3) is provided with a ceramic phase-change thermal storage module (6) that accumulates or releases the heat generated in the heat-generating box (2). Along the flow direction of the circulating air, the The heat generating box (2), the heat storage box (3) and the heat exchange box (4) are sequentially installed on the thermal insulation pipe (1). 2. A phase change thermal storage heating device according to claim 1, characterized in that a first valve (8-1) is provided between the heat generating box (2) and the thermal storage box (3). ), a second valve (8-2) is provided between the heat storage box (3) and the heat exchange box (4). 3. A phase-change thermal storage heating device according to claim 2, characterized in that, when the phase-change thermal storage heating device is in an operating state, the first valve (8-1) and the second valve (8-2) is in an open state; when the phase-change thermal storage heating device is in a closed state, the first valve (8-1) and the second valve (8-2) are in a closed state. The phase-change thermal storage heating device according to claim 1, wherein the ceramic phase-change thermal storage module (6) comprises a ceramic phase-change thermal storage material, and a phase-change thermal storage material provided on the ceramic phase-change thermal storage material. An air duct for the circulation of the circulating air therebetween. 5 . The phase-change thermal storage heating device according to claim 4 , wherein the ceramic phase-change thermal storage material is prepared by mixing a ceramic material with a phase-change thermal storage material. 6 . 6 . The phase-change thermal storage heating device according to claim 4 , wherein the phase-change temperature of the ceramic phase-change thermal storage material is 300-800° C. 7 . 7 . The phase-change thermal storage heating device according to claim 4 , wherein the ceramic phase-change thermal storage material has a wall thickness of 0.5-2.0 mm and a porosity of 65-75%, preferably is 70%. 8. A phase-change thermal storage heating device according to claim 1, characterized in that, an electric heater (5) is arranged in the heat-generating box (2) to convert electrical energy into thermal energy and heat the heat-generating box (2). Circulate air. 9. A phase-change heat storage heating device according to claim 1, characterized in that, a heat exchanger (7) is provided in the heat exchange box (4), and the heat storage box (3) is provided with a heat exchanger (7). ) heated circulating air through the heat exchanger (7) to heat the heating medium to achieve heating to the outside world. 10 . The phase change thermal storage heating device according to claim 1 , wherein the heating medium is water. 11 .