CN107166771A - Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus and system - Google Patents

Abstract

The invention discloses a fast wall-mounted natural circulation phase-change solar heat storage device and system, which solves the heat storage problem of solar water heaters. The heat storage device can be inlaid or hung on the outer surface of a building, effectively saving space, and does not need a water pump. Stable and reliable operation through natural circulation, the technical solution is: including a heat storage box, the heat storage box is equipped with a solar hot water pipeline and a heat release pipeline, and the inner wall of the heat storage box is connected with the solar hot water pipeline and the heat release pipeline The gap between them forms a heat storage space, and the heat storage space is filled with phase change heat storage materials; the medium in the solar hot water pipeline flows in a natural circulation mode, and transfers heat to the phase change heat storage materials, and the phase change heat storage After heat storage, the material exchanges heat with the medium in the heat release pipeline.

Description

Fast wall-mounted natural circulation phase change solar heat storage device and system

technical field

The invention relates to the technical field of solar thermal storage, in particular to a fast wall-mounted natural circulation phase-change solar thermal storage device and system.

Background technique

At present, solar water heaters are the most common solar heat utilization devices, but because solar energy is affected by weather changes, day and night, etc., it has disadvantages such as discontinuity and instability. Therefore, solar water heaters are mostly equipped with heat storage devices for heat storage.

However, most of the heat storage devices of existing solar water heaters are cylindrical water tanks, and most of them are installed on balconies except for higher floors installed on the roof, which not only takes up living space, but also affects the indoor appearance; a small part uses phase change heat storage materials Although the phase-change heat storage tank of the current phase-change heat storage tank takes up a little space, it generally requires a water pump to drive the high-temperature liquid in the collector to exchange heat with the heat storage tank, which not only consumes energy, but also reduces the reliability of the solar water heating system.

To sum up, there is still no effective solution to the heat storage problem of solar water heaters in the prior art.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a fast wall-mounted natural circulation phase-change solar heat storage device, which can be inlaid or suspended on the outer surface of the building, effectively saving space, without the need for water pumps, through natural circulation Stable and reliable operation;

Further, the present invention adopts the following technical solutions:

The fast wall-mounted natural circulation phase-change solar heat storage device includes a heat storage box, and the heat storage box is equipped with a solar hot water pipeline and a heat release pipeline, and the inner wall of the heat storage box is connected with the solar hot water pipeline and the heat release pipeline. The gap between them forms a heat storage space, and the heat storage space is filled with a phase change heat storage material;

The medium in the solar hot water pipeline flows in a natural circulation mode, and transfers heat to the phase change heat storage material, and the phase change heat storage material exchanges heat with the medium in the heat release pipeline after heat storage.

The solar heat storage device of the present invention is provided with a heat storage box, and a solar hot water pipeline and a heat release pipeline are arranged in the heat storage box. In the process of flow, the heat is transferred to the phase change heat storage material; after the phase change heat storage material absorbs heat, when the cold water in the heat release pipeline circulates, the phase change heat storage material transfers heat to the cold water in the heat release pipeline, In turn, the cold water in the heat release pipeline is heated up and delivered to the place where the user needs hot water. The device of the invention circulates automatically, and can automatically realize heat exchange without setting up a water pump, and occupies less space.

Further, the solar hot water pipeline includes an upper header with an inlet and a lower header with an outlet, the upper header is arranged at the upper part of the heat storage box, and the lower header is arranged at the lower part of the heat storage box , at least one branch pipe is connected between the upper header and the lower header. The hot water in the collector enters from the upper header, enters the lower header through the branch pipe, and then enters the collector from the lower header. Natural circulation can be realized through the density change caused by the change of water temperature in the collector.

Further, there are multiple branch pipes, and the multiple branch pipes are uniformly arranged between the upper header and the lower header. The phase change heat storage material in the heat storage box can absorb heat evenly.

Further, the heat release pipeline includes at least one coiled pipe distributed in a serpentine shape in the vertical plane, the upper end of the coiled pipe is connected to the outlet of the heat release pipe, and the lower end of the coiled pipe is connected to the inlet of the heat release pipe. Setting the heat release pipeline as a coil can increase the heat exchange area between the heat release pipeline and the phase change heat storage material.

Further, the heat release pipeline and the solar hot water pipeline are intersected.

Further, a plurality of water pipe brackets are arranged in the heat storage box, and the heat release pipeline is supported on the water pipe brackets. The water pipe bracket supports the heat release pipeline to ensure its stability.

Further, a filling port is provided on the upper part of the heat storage box. The stuffing port is used to add materials to the box and can also be used as an exhaust port, and the stuffing port can be sealed and closed.

Further, thermal insulation materials are arranged on the outside of the heat storage box. The thermal insulation material is provided to ensure that the temperature in the heat storage box will not be affected by the external environment.

Further, the phase change heat storage material is an inorganic hydrated salt, or the phase change heat storage material is an expanded graphite/paraffin wax composite material, and the phase change temperature of the phase change heat storage material is 40-70°C.

A solar phase change heat storage system, comprising a heat collector and the heat storage device as described above, the inlet of the upper header communicates with the outlet of the heat collector, and the outlet of the lower header communicates with the inlet of the heat collector. The solar hot water pipeline is connected to the heat collector. After the water in the heat collector is heated, the water temperature rises and the density becomes lower. The hot water in the heat collector flows upwards into the header on the solar hot water pipeline, and flows down to In the lower header, during the downward flow process, the hot water in the solar hot water pipeline exchanges heat with the phase change heat storage material, and the phase change heat storage material is heated for phase change heat storage.

Further, the inlet of the heat release pipe is connected to a positive pressure water source pipeline, and the outlet of the heat release pipe is connected to a user water pipeline. After the cold water enters the heat release pipe from the positive pressure water source pipeline, the phase change heat storage material exchanges heat with the cold water in the heat release pipe, so that the cold water in the heat release pipe is warmed up and then sent to the user water pipe for use by the user.

Compared with prior art, the beneficial effect of the present invention is:

Due to the use of phase change heat storage materials, the heat storage capacity is strong, the volume required for heat storage is smaller than that of water, and it is made into a flat cuboid shape, which can be inlaid or hung on the outer wall or balcony, and does not occupy indoor living or balcony space.

Since the solar hot water pipeline adopts the structure of upper and lower headers and branch pipes, and the upper header is located at the highest point in the tank, and the lower header is located at the lowest point in the tank, the branch pipes of the heat storage tank are cooled to become descending pipes, corresponding to the inner branch pipes of the collector When heated, it becomes a riser pipe, which can realize natural circulation by using the density difference of water, without the need for a water pump, and the operation is safe and reliable.

Since the heat release pipeline can be directly connected to the tap water pipe network, the water pressure of the municipal pipe network can be used for flow heat exchange without a water pump, which is safe and reliable; the tap water pipe is a coil structure with a large heat transfer area and sufficient heat transfer, which can instantly heat tap water into Shower with hot water.

Since the heat storage and heat release process adopts two sets of independent pipelines, the heat storage and heat release can be carried out independently at the same time, which is convenient and flexible to use.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is a front sectional view of a solar heat storage device of the present invention;

Fig. 2 is a side sectional view of the solar heat storage device of the present invention;

In the figure, 1 is the heat storage box, 2 is the solar hot water inlet, 3 is the solar hot water return port, 4 is the solar hot water upper header, 5 is the solar hot water lower header, 6 is the solar hot water branch pipe, 7 is the inlet of the heat release pipe, 8 is the outlet of the heat release pipe, 9 is the heat release pipeline, 10 is the phase change heat storage material, and 11 is the water pipe bracket.

detailed description

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Explanation of terms: Natural circulation refers to the way of using the temperature difference between hot water supply and return water to make hot water circulate in the pipe network by itself.

As introduced in the background technology, there is a problem of heat storage of solar water heaters in the prior art. In order to solve the above technical problems, this application proposes a fast wall-mounted natural circulation phase-change solar heat storage device and system.

In a typical implementation of the present application, as shown in Figures 1-2, a fast wall-mounted natural circulation phase-change solar heat storage device is provided, including a heat storage box 1, and the heat storage box 1 is set The solar hot water pipeline and the heat release pipeline 9, the gap between the inner wall of the heat storage box 1 and the solar hot water pipeline and the heat release pipeline 9 forms a heat storage space, and the phase change heat storage material 10 is filled in the heat storage space; The shape of the heat box 1 is a flat cubic box;

The medium in the solar hot water pipeline flows in a natural circulation mode, and transfers heat to the phase change heat storage material, and the phase change heat storage material exchanges heat with the medium in the heat release pipeline after heat storage.

The solar hot water pipeline includes an upper header (ie solar hot water upper header 4) with an inlet (ie solar hot water inlet 2) and a lower header (ie solar hot water return port 3) with an outlet (ie The lower header 5 for solar water heating, the upper header 4 for solar water heating is arranged at the upper part of the heat storage box 1, the lower header 5 for solar water heating is arranged at the lower part of the inner heat storage box 1, and the upper header 4 for solar water heating At least one branch pipe (that is, the solar hot water branch pipe 6) is connected with the lower header 5 of the solar water heating. When there are multiple solar hot water branch pipes 6, the plurality of solar hot water branch pipes 6 are evenly arranged between the solar hot water upper header 4 and the solar hot water lower header 5, which can make the phase change in the heat storage tank The heat storage material absorbs heat evenly. The solar hot water upper header 4 is horizontally arranged at the top inside the heat storage box 1, and the solar hot water lower header 5 is horizontally arranged at the bottom of the inside of the heat storage box 1, and the solar hot water pipeline is the same pipeline as a whole.

The heat release pipeline 9 includes at least one coiled pipe distributed in a serpentine shape in the vertical plane, the upper end of the coiled pipe is connected with the heat release pipe outlet 8 , and the lower end of the coiled pipe is connected with the heat release pipe inlet 7 .

In the heat storage device of the present invention, the heat release pipeline and the solar hot water pipeline are intersected.

A plurality of water pipe brackets 11 are arranged inside the heat storage box 1 , and the heat release pipeline 9 is supported on the water pipe brackets 11 . The water pipe bracket supports the heat release pipeline to ensure its stability.

The top of the heat storage box 1 is provided with a filling port. The stuffing port is used to add materials to the box and can also be used as an exhaust port, and the stuffing port can be sealed and closed.

Thermal insulation material is arranged on the outside of the heat storage box 1 . The thermal insulation material is provided to ensure that the temperature in the heat storage box will not be affected by the external environment.

The phase change heat storage material 10 is filled in the entire space inside the heat storage box 1 except the solar hot water pipeline and the heat release pipeline. The phase change heat storage material 10 is an inorganic hydrated salt, or the phase change heat storage material is expanded graphite/ The paraffin composite material has a relatively fixed phase transition temperature, and the phase transition temperature of the phase change thermal storage material is 40-70°C.

In another typical embodiment of the present application, a solar phase change thermal storage system is provided, including a heat collector and the thermal storage device as described above, the solar hot water inlet 2 of the solar hot water upper header 4 and the The collector outlet is connected, and the solar hot water return port 3 of the solar hot water lower header 5 is connected with the collector inlet to form a solar hot water loop. The medium in the loop depends on the density of the heat storage device and the two sides of the external heat collector. Poor natural circulation. The solar hot water pipeline is connected to the heat collector. After the water in the heat collector is heated, the water temperature rises and the density becomes lower. The hot water in the heat collector flows upwards into the header on the solar hot water pipeline, and flows down to In the lower header, during the downward flow process, the hot water in the solar hot water pipeline exchanges heat with the phase change heat storage material, and the phase change heat storage material is heated for phase change heat storage.

The heat release pipe inlet 7 is connected with the positive pressure water source pipeline (can be water sources such as running water of the municipal pipe network), and the heat release pipe outlet 8 is connected with the user water pipeline (can be water places such as showers). After the cold water enters the heat release pipe from the positive pressure water source pipeline, the phase change heat storage material exchanges heat with the cold water in the heat release pipe, so that the cold water in the heat release pipe is warmed up and then sent to the user water pipe for use by the user.

The wall-mounted phase-change heat storage box provided by the invention is flat cuboid in shape and small in volume, which can be hung or embedded on the outer surface of the building, saving building space and facilitating building integration; the structure of the upper and lower headers and branch pipes can effectively The natural circulation is formed by using the density difference of the water in the heat collector and the heat storage tank pipeline. The heat release process can use the pressure of the water source such as the municipal pipe network. The whole device does not need a water pump, which is safe, energy-saving and reliable; heat storage and heat release can be carried out at the same time , The hot water for shower or domestic use can be obtained directly through the heat exchange box, which is flexible and convenient to use.

In order to enable those skilled in the art to understand the technical solution of the present application more clearly, the technical solution of the present application will be described in detail below in conjunction with specific working processes.

On sunny days, the external solar heat collector heats the water in the heat collector so that its temperature rises and the density becomes lower, and the hot water in the heat collector flows upwards and enters the solar hot water upper header in the heat storage tank 1 through the connecting pipe 4. The water in the solar hot water lower header 5 in the heat storage tank 1 is supplemented by connecting pipes and enters the external heat collector; the water in the solar hot water upper header 4 flows downward through the solar hot water branch pipe 6 Cooled by the phase-change heat storage material 10, the temperature gradually decreases and the density increases, and enters the lower header 5 of the solar hot water, and the water in the external solar heat collector and the heat storage tank 1 solar hot water pipeline utilizes the density of the two Poor natural circulation. The phase-change thermal storage material 10 is heated during such flow to perform phase-change thermal storage.

When water is needed, the cold water at the water source such as tap water in the municipal pipe network enters the heat release pipeline 9 from the heat release pipe inlet 7, and exchanges heat with the phase change heat storage material 10 in the heat storage tank 1. Since the heat release pipeline is relatively long The coil pipe, the cold water can reach a higher temperature after passing through the heat storage tank, and then flows to showers and other places that need hot water through the heat release pipe outlet 8.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. Quick-action type wall hanging Natural Circulation phase-change solar regenerative apparatus, it is characterized in that, including accumulation of heat casing, the accumulation of heat casing Interior setting solar water pipeline and heat-releasing pipeline, between accumulation of heat cabinet wall and solar water pipeline, heat-releasing pipeline between Phase change heat storage material is filled in gap formation accumulation of heat space, the accumulation of heat space；

Medium is flowed with natural circulation mode in solar water pipeline, and transfers heat to phase change heat storage material, and phase transformation stores After hot material accumulation of heat heat exchange is carried out with medium in heat-releasing pipeline.

2. regenerative apparatus as claimed in claim 1, it is characterized in that, the solar water pipeline includes the upper collection with entrance Pipe and the lower collector pipe with outlet, the upper header are arranged at top in heat storage tank body, under lower collector pipe is arranged in heat storage tank body Portion, connects at least one branch pipe between upper header and lower collector pipe.

3. regenerative apparatus as claimed in claim 2, it is characterized in that, the branch pipe is many, and many branch pipes are uniformly arranged setting Between upper header and lower collector pipe.

4. regenerative apparatus as claimed in claim 2, it is characterized in that, the heat-releasing pipeline includes at least one in perpendicular Into the coil pipe of snakelike distribution, the coil pipe upper end is connected with heat outting pipe outlet, and the coil pipe lower end is connected with heat release tube inlet.

5. regenerative apparatus as claimed in claim 1, it is characterized in that, the heat-releasing pipeline and solar water pipeline intersection are set Put.

6. regenerative apparatus as claimed in claim 1, it is characterized in that, multiple water pipe brackets, heat release are set in the heat storage tank body Pipe-support is on water pipe bracket.

7. regenerative apparatus as claimed in claim 1, it is characterized in that, the accumulation of heat casing top sets feeding port；The accumulation of heat Insulation material is set on the outside of casing.

8. regenerative apparatus as claimed in claim 1, it is characterized in that, the phase change heat storage material is inorganic hydrated salt, or described Phase change heat storage material is expanded graphite/paraffin composite, and the phase change heat storage material phase transition temperature is at 40-70 DEG C.

9. a kind of solar energy phase transition heat accumulation system, it is characterized in that, including heat collector and regenerative apparatus as claimed in claim 4, The entrance and heat collector outlet of the upper header, the outlet of the lower collector pipe is connected with heat collector entrance.

10. hold over system as claimed in claim 9, it is characterized in that, heat release tube inlet and malleation the water supply line connection is put Heat pipe is exported and the connection of user's water service pipe road.