Heat supply system utilizing solar energy coupling short-term energy storage device

Abstract

The invention relates to a heat supply system utilizing a solar energy coupling short-term energy storage device. The heat supply system comprises a solar heat collector, an energy storage mechanism, a heat pump unit and a control center. The outlet end of the solar heat collector is connected with the energy storage mechanism through a first pipeline, and a first temperature sensor is arranged on the first pipeline. The energy storage mechanism is connected with the heat pump unit through a second pipeline, and a second temperature sensor is arranged in the energy storage mechanism. The heat pump unit is connected with the inlet end of the solar heat collector through a third pipeline, and a first control valve is arranged on the third pipeline. A fourth pipeline is communicated between the first pipeline and the third pipeline, a second control valve is arranged on the fourth pipeline, a fifth pipeline is communicated between the first pipeline and the second pipeline, and a third control valve is arranged on the fifth pipeline; the first temperature sensor, the second temperature sensor, the first control valve, the second control valve and the third control valve are all electrically connected with the control center.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a heating system using solar energy coupled with a short-term energy storage device. Background Art

[0002] Solar heating is a technology that uses solar collectors to collect solar radiation and convert it into heat for heating. The solar collectors collect solar radiation and convert it into heat energy, which is then transported to the heat dissipation end or heat-using equipment to meet the heating and domestic hot water demands of buildings. The solar heating method is restricted by sunlight and cannot provide heat energy continuously. Other heat source devices are required to assist in heating at night or on cloudy days, increasing the system energy consumption. To overcome this problem, the present invention provides a heating system using solar energy coupled with a short-term heat storage type energy storage device to continuously provide high-quality heat energy, thereby meeting the heating and domestic hot water supply. Summary of the Invention

[0003] The purpose of the present invention is to provide a heating system using solar energy coupled with a short-term energy storage device to solve the technical problems raised in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A heating system using solar energy coupled with a short-term energy storage device, which includes: a solar collector, an energy storage mechanism, a heat pump unit, and a control center;

[0006] The outlet end of the solar collector is connected to the energy storage mechanism through Pipeline 1, and a temperature sensor 1 is provided on Pipeline 1; the energy storage mechanism is connected to the heat pump unit through Pipeline 2, and a temperature sensor 2 is provided inside the energy storage mechanism; the heat pump unit is connected to the inlet end of the solar collector through Pipeline 3, and a control valve 1 is provided on Pipeline 3; Pipeline 1, Pipeline 2, and Pipeline 3 are used to transfer the heat transfer medium, the energy storage mechanism is used to store heat, and the heat pump unit is used to connect to an indoor unit to release heat;

[0007] A Pipeline 4 is connected between Pipeline 1 and Pipeline 3, and a control valve 2 is provided on Pipeline 4; a Pipeline 5 is connected between Pipeline 1 and Pipeline 2, and a control valve 3 is provided on Pipeline 5;

[0008] The temperature sensor 1, the temperature sensor 2, the control valve 1, the control valve 2, and the control valve 3 are all electrically connected to the control center.

[0009] As a further improvement of the present invention, the energy storage mechanism includes a heat preservation energy storage pool and a heat exchanger located inside the heat preservation energy storage pool, and a heat storage medium is provided between the heat exchanger and the inside of the heat preservation energy storage pool;

[0010] Both the first pipeline and the second pipeline are connected to the heat exchanger.

[0011] As a further improvement of the present invention, the heat storage medium is demineralized water.

[0012] As a further improvement of the present invention, a water pump electrically connected to the control center is provided on the second pipeline.

[0013] As a further improvement of the present invention, a flow sensor electrically connected to the control center is provided on the third pipeline.

[0014] As a further improvement of the present invention, both ends of the solar collector are communicated with a water collector and a water distributor; the water collector is connected to the energy storage mechanism through the first pipeline, and a safety valve is provided on the water collector, and the water distributor is connected to the heat pump unit through the third pipeline.

[0015] As a further improvement of the present invention, the heat transfer medium is an ethylene glycol aqueous solution.

[0016] The beneficial effects of adopting the above technical solutions are as follows:

[0017] The present invention is provided with an energy storage mechanism, which is coupled with the solar collector and the heat pump system to realize short-term heat storage, which is beneficial to the utilization of solar energy during heating; when the sunlight absorbed by the solar collector is insufficient, the heat in the energy storage mechanism can be used for heating, and high-quality heating in winter can be realized without an auxiliary heat source, and high-quality heat energy can be continuously provided, so as to meet the heating and domestic hot water supply and increase the use range of clean energy. Description of the Drawings

[0018] Figure 1 It is the first circulation schematic diagram of the present invention;

[0019] Figure 2 It is the second circulation schematic diagram of the present invention;

[0020] Figure 3 It is the third circulation schematic diagram of the present invention;

[0021] Explanation of the marks in the figure: 1 solar collector, 2 heat pump unit, 3 control center, 4 first pipeline, 5 first temperature sensor, 6 second pipeline, 7 second temperature sensor, 8 third pipeline, 9 first control valve, 10 indoor unit, 11 fourth pipeline, 12 second control valve, 13 fifth pipeline, 14 third control valve, 15 heat preservation energy storage tank, 16 heat exchanger, 17 heat storage medium, 18 water pump, 19 flow sensor, 20 water collector, 21 water distributor, 22 safety valve. Detailed Embodiments

[0022] To better understand the purpose, structure and function of the present invention, the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] As Figures 1 - 3 shown, a heating system using a solar energy-coupled short-term energy storage device includes: a solar collector 1, an energy storage mechanism, a heat pump unit 2, and a control center 3.

[0024] The outlet end of the solar collector 1 is connected to the energy storage mechanism through a first pipeline 4, and a first temperature sensor 5 is provided on the first pipeline 4. The solar collector 1 absorbs the heat of the sun and transfers the heat to the heat transfer medium therein. The heat transfer medium flows through the first pipeline 4 into the energy storage mechanism for heat storage. The first temperature sensor 5 is used to detect the temperature of the heat transfer medium in the first pipeline 4. Among them, the heat transfer medium is selected as an anti-freezing element. In this embodiment, the heat transfer medium is an ethylene glycol aqueous solution. In addition, both ends of the solar collector 1 are connected to a water collector 20 and a water distributor 21 to evenly distribute the flow rate in the solar collector 1. The water collector 20 is connected to the energy storage mechanism through the first pipeline 4, that is, the heat transfer medium in the water collector 20 is transferred to the energy storage mechanism. A safety valve 22 is provided on the water collector 20, which is opened when the system pressure exceeds the limit to avoid damage to the system device due to overpressure.

[0025] The energy storage mechanism is connected to the heat pump unit 2 through a second pipeline 6, and a second temperature sensor 7 is provided inside the energy storage mechanism. Part of the heat of the heat transfer medium is stored in the energy storage mechanism, and the other part is transferred to the heat pump unit 2 through the second pipeline 6. The heat pump unit 2 is used to connect to an indoor unit 10 to release heat for heating users and providing domestic hot water. The temperature sensor is used to detect the temperature inside the heat storage mechanism. The energy storage mechanism includes a heat-insulated energy storage tank 15 and a heat exchanger 16 located inside the heat-insulated energy storage tank 15, and a heat storage medium 17 is provided between the heat exchanger 16 and the inside of the heat-insulated energy storage tank 15. Both the first pipeline 4 and the second pipeline 6 are connected to the heat exchanger 16. In this embodiment, the heat exchanger 16 is selected as a shell-and-tube heat exchanger, and the heat storage medium 17 is demineralized water, which has a large specific heat and can store heat energy better. At the same time, demineralized water is not easy to scale, so that the shell-and-tube heat exchanger can maintain a high heat exchange efficiency and avoid the problem of reduced heat exchange efficiency after the shell-and-tube heat exchanger is scaled. The heat-insulated energy storage tank 15 is made of a material with low thermal conductivity and good heat insulation effect to effectively prevent heat loss of demineralized water. The second temperature sensor 7 is used to detect the temperature of demineralized water. In addition, a water pump 18 electrically connected to the control center 3 is provided on the second pipeline 6, and the water pump 18 provides power for the entire system.

[0026] The inlet end of the heat pump unit 2 is connected to the solar collector 1 through the third pipeline 8, that is, the heat pump unit 2 is connected to the water distributor 21 through the third pipeline 8, and a first control valve 9 and a flow sensor 19 electrically connected to the control center 3 are provided on the third pipeline 8; the first pipeline 4, the second pipeline 6 and the third pipeline 8 are used to transfer the heat transfer medium. The heat transfer medium heated by the heat pump unit 2 enters the water distributor 21 and is evenly distributed by the water distributor 21 to the solar heat collecting plates to absorb heat. A fourth pipeline 11 is connected between the first pipeline 4 and the third pipeline 8, and a second control valve 12 is provided on the fourth pipeline 11. A fifth pipeline 13 is connected between the first pipeline 4 and the second pipeline 6, and a third control valve 14 is provided on the fifth pipeline 13; and the first temperature sensor 5, the second temperature sensor 7, the first control valve 9, the second control valve 12, and the third control valve 14 are all electrically connected to the control center 3.

[0027] The control center 3 adjusts the circulation of this system, which includes a controller and a water pump 18 control unit and a valve control unit connected to the controller. Among them, the water pump 18 control unit is connected to the water pump 18, and the valve control unit is connected to the control valve; the controller is connected to the temperature sensor and the flow sensor 19, receives the temperature signal or the flow signal, and issues instructions to the valve control unit and / or the water pump 18 control unit according to the received signal to control the opening and closing of the water pump 18 and / or the control valve.

[0028] As Figure 1 shown, it is a schematic diagram of the circulation of the first usage mode of this system, which is applicable when there is sufficient sunlight and heat needs to be stored in the heat preservation energy storage tank 15. In this state, the first control valve 9 is opened, and the second control valve 12 and the third control valve 14 are closed. The heat transfer medium flows out of the collector and flows to the heat preservation energy storage tank 15, and the heat is transferred to the demineralized water through the shell and tube heat exchanger 16 in the heat preservation energy storage tank 15, and the temperature of the demineralized water rises to complete the heat storage; the heat transfer medium that has completed energy storage still carries a certain amount of heat and enters the heat pump unit 2 through the circulation water pump 18 to completely release the heat. The heat pump unit 2 releases heat to the indoor unit 10 to provide heating and domestic hot water; since the second control valve 12 is closed and the first control valve 9 is opened, the heat transfer medium after passing through the heat pump unit 2 enters the water distributor 21 through the third pipeline 8 and is evenly distributed by the water distributor 21 to the solar heat collecting plates to absorb heat.

[0029] As Figure 2As shown in the figure, it is a cycle schematic diagram of the second usage mode of this system, which is applicable when there is sufficient sunlight and there is no need to store heat in the heat preservation energy storage pool 15. In this state, the temperature sensor II 7 detects that the temperature of the demineralized water reaches the preset threshold value. The control center 3 issues an instruction to control the opening of the control valve I 9 and the control valve III 14, and the closing of the control valve II 12. At the same time, the control pump 18 reduces the circulating flow rate of the heat transfer medium, thereby reducing the heat absorption of the solar collector 1 from solar energy, keeping the heat transfer medium in the solar collector 1 at the optimal temperature, and maximizing the solar energy conversion efficiency of the solar collector 1. The heat transfer medium in the pipeline I 4 does not flow into the heat preservation energy storage pool 15 for heat exchange, but directly flows through the pipeline V 13 to the pipeline II 6 and is transferred to the heat pump unit 2. The heat transfer medium after passing through the heat pump unit 2 enters the water distributor 21 through the pipeline III 8. Of course, to prevent some of the heat transfer medium from still entering the heat preservation energy storage pool 15 for heat exchange, a control valve can also be set on the pipeline I 4 before the pipeline V 13 (the end connected to the pipeline I 4) and before the energy storage mechanism. In this state, this control valve is closed. In this system, the energy storage mechanism is coupled with the solar collector 1 and the heat pump system to achieve short-term heat storage, which is beneficial to the utilization of solar energy during heating.

[0030] As Figure 3 shown in the figure, it is a cycle schematic diagram of the third usage mode of this system, which is applicable when there is insufficient sunlight. In this state, the temperature sensor I 5 detects that the temperature of the heat transfer medium in the pipeline I 4 is less than the preset threshold value. The control center 3 issues an instruction to control the opening of the control valve II 12 and the closing of the control valve I 9 and the control valve III 14. The heat transfer medium absorbs the heat of the demineralized water and is transferred to the heat pump unit 2 through the pipeline III 8. The heat transfer medium after passing through the heat pump unit 2 directly enters the heat preservation energy storage pool 15 through the pipeline IV 11 and a section of the pipeline II 6 close to the energy storage mechanism, and circulates to absorb the heat of the demineralized water for heating. Of course, to prevent some of the heat transfer medium from reversely entering the solar collector 1 from the end of the pipeline IV 11 (the end connected to the pipeline I 4), a control valve can also be set on the pipeline I 4 between the end of the pipeline IV 11 and the solar collector 1. In this state, this control valve is closed. This device does not require an auxiliary heat source when there is insufficient sunlight, and can achieve high-quality heating in winter by using the heat in the energy storage mechanism, continuously providing high-quality heat energy, so as to meet the heating and domestic hot water supply, and increase the scope of use of clean energy.

[0031] It will be understood that the present invention is described by way of some embodiments, and those skilled in the art will know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present invention. Additionally, under the teaching of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the present invention.

Claims

1. A heating system using solar energy coupled with a short-term energy storage device, characterized in that: It includes: a solar collector (1), an energy storage mechanism, a heat pump unit (2), and a control center (3); The outlet end of the solar collector (1) is connected to the energy storage mechanism through a first pipeline (4), and a first temperature sensor (5) is provided on the first pipeline (4); the energy storage mechanism is connected to the heat pump unit (2) through a second pipeline (6), and a second temperature sensor (7) is provided inside the energy storage mechanism; the heat pump unit (2) is connected to the inlet end of the solar collector (1) through a third pipeline (8), and a first control valve (9) is provided on the third pipeline (8); the first pipeline (4), the second pipeline (6), and the third pipeline (8) are used to transfer a heat transfer medium, the energy storage mechanism is used to store heat, and the heat pump unit (2) is used to connect to an indoor unit (10) to release heat; A fourth pipeline (11) is communicated between the first pipeline (4) and the third pipeline (8), a second control valve (12) is provided on the fourth pipeline (11), a fifth pipeline (13) is communicated between the first pipeline (4) and the second pipeline (6), and a third control valve (14) is provided on the fifth pipeline (13); The first temperature sensor (5), the second temperature sensor (7), the first control valve (9), the second control valve (12), and the third control valve (14) are all electrically connected to the control center (3).

2. The heating system using a solar energy-coupled short-term energy storage device according to claim 1, characterized in that: The energy storage mechanism includes a heat-insulated energy storage tank (15) and a heat exchanger (16) located inside the heat-insulated energy storage tank (15), and a heat storage medium (17) is provided between the heat exchanger (16) and the inside of the heat-insulated energy storage tank (15); Both the first pipeline (4) and the second pipeline (6) are connected to the heat exchanger (16).

3. A heating system using a solar energy-coupled short-term energy storage device according to claim 2, characterized in that: The heat storage medium (17) is demineralized water.

4. A heating system using a solar energy-coupled short-term energy storage device according to claim 1, characterized in that: A water pump (18) electrically connected to the control center (3) is provided on the second pipeline (6).

5. A heating system using a solar energy-coupled short-term energy storage device according to claim 1, characterized in that: A flow sensor (19) electrically connected to the control center (3) is provided on the third pipeline (8).

6. A heating system using a solar energy-coupled short-term energy storage device according to claim 1, characterized in that: Both ends of the solar collector (1) are communicated with a water collector (20) and a water distributor (21); the water collector (20) is connected to the energy storage mechanism through the first pipeline (4), and a safety valve (22) is provided on the water collector (20), and the water distributor (21) is connected to the heat pump unit (2) through the third pipeline (8).

7. A heating system using a solar energy-coupled short-term energy storage device according to claim 1, characterized in that: The heat transfer medium is an ethylene glycol aqueous solution.

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