Novel domestic hot water supply system coupling geothermal energy and urban heat supply network

Abstract

The utility model relates to the field of domestic hot water systems, and discloses a geothermal energy and urban heat supply network coupled novel domestic hot water supply system which comprises a geothermal system and an urban heat supply network heat supply system, and the geothermal system comprises a geothermal source circulating pump, a plate heat exchanger, a heat storage water tank and a geothermal source adjusting valve; the urban heat supply network heat supply system comprises a displacement heat exchanger, a heat supply network circulating pump and a heat supply network adjusting valve. The displacement heat exchanger is connected with urban heat supply network water supply and urban heat supply network return water. The heat supply network circulating pump is connected with a user side water supply device, and the plate heat exchanger is connected with a user side water return device. According to the utility model, the advantages of geothermal energy and an urban heat supply network heat supply system are well combined, and the system has the advantages of safety, reliability, energy conservation, environmental protection, wide application range and the like.

Description

Technical Field

[0001] The utility model relates to the field of domestic hot water systems, in particular to a new domestic hot water supply system coupling geothermal energy and urban heat networks. Background Technique

[0002] According to the properties and existence states of geothermal energy and different storage locations, it can be divided into shallow geothermal energy (temperature below 25°C, depth less than 200 meters), medium-deep geothermal energy (temperature above 25°C, depth within 3000 meters), and ultra-deep geothermal energy (temperature above 150°C, depth greater than 3000 meters), etc. Geothermal energy is also a clean and renewable energy source that does not cause air pollution, has large reserves, wide distribution, is green, low-carbon, stable, and reliable.

[0003] In the heating industry, domestic hot water supply systems for residents are widespread and need to continuously supply domestic hot water throughout the year. With the improvement of people's living standards, the requirements for hot water temperature, safe, continuous, and stable operation are getting higher and higher. Therefore, providing an intelligent, efficient, energy-saving, and controllable domestic hot water system has become an urgent problem to be solved. Content of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose a new domestic hot water supply system coupling geothermal energy and urban heat networks, which combines the advantages of geothermal energy and urban heat network heating systems better, and the utility model has the advantages of safety, reliability, energy conservation, environmental protection, wide application range, etc.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A new domestic hot water supply system coupling geothermal energy and urban heat networks includes a geothermal system and an urban heat network heating system. The geothermal system includes a geothermal source circulation pump, a plate heat exchanger, a hot water storage tank, and a geothermal source regulating valve;

[0007] The urban heat network heating system includes a volume heat exchanger, a heat network circulation pump, and a heat network regulating valve;

[0008] Through the above technical solutions, the advantages of geothermal energy and urban heat network heating systems are combined, and it can ensure continuous supply of domestic hot water throughout the year, which greatly facilitates our lives and makes our lives more convenient.

[0009] Furthermore, the volume heat exchanger is connected with urban heat network water supply and urban heat network return water;

[0010] Through the above technical solutions, the heating and utilization of heat network return water are realized.

[0011] Furthermore, the heat network circulation pump is connected to the water supply at the user end, and the plate heat exchanger is connected to the return water at the user end;

[0012] Through the above technical solution, it is beneficial to complete the supply and use of hot water and the recycling of the return water after heat release.

[0013] Furthermore, the inlets and outlets of the ground heat source circulation pump and the heat network circulation pump are soft-connected to the pipeline, and the connected pipeline is provided with a welded ball valve;

[0014] Through the above technical solution, the soft connection realized by using the hose connection can play a role in compensation, vibration isolation and noise reduction.

[0015] Furthermore, pressure gauges, thermometers and welded ball valves are provided on the connecting pipelines of the plate heat exchanger and the volume heat exchanger;

[0016] Through the above technical solution, various data of the current operating system can be monitored, including the pressure and temperature data in the pipeline.

[0017] Furthermore, the hot water storage tank is made of aluminum and copper materials and is plated with a 0.5 cm layer of metallic chromium on the inner and outer layers;

[0018] Through the above technical solution, the metallic chromium on the outer layer can effectively isolate oxygen materials, prevent oxidation and extend the service life.

[0019] Furthermore, both the ground heat source regulating valve and the heat network regulating valve are connected to the pipeline by using welded ball valves;

[0020] Through the above technical solution, the selective opening and closing operations can be carried out according to needs by using the setting of the welded ball valve.

[0021] The utility model has the following beneficial effects:

[0022] 1. It can ensure the continuous supply of domestic hot water throughout the year, which greatly facilitates our life and makes our life more efficient;

[0023] 2. Energy-saving and environmental protection, without any waste gas emissions;

[0024] 3. The system has a high degree of automation, realizes unattended operation and can be remotely controlled;

[0025] 4. It can realize functions such as data acquisition, fault alarm, historical record, etc., which is convenient for digital operation management and has low operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a new domestic hot water supply system coupling geothermal energy and urban heat network proposed by the utility model.

[0027] Legend Explanation:

[0028] 1. Ground heat source circulation pump; 2. Plate heat exchanger; 3. Hot water storage tank; 4. Volume heat exchanger; 5. Ground heat source regulating valve; 6. Heat network circulation pump; 7. Heat network regulating valve. Detailed Implementation Manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Refer to Figure 1 , an embodiment provided by the present invention:

[0031] A new type of domestic hot water supply system coupling geothermal energy and urban heat network, wherein the new type of domestic hot water supply system coupling geothermal energy and urban heat network mainly consists of two parts: a geothermal system and an urban heat network heating system. During the non-heating season, domestic hot water is provided by the geothermal system. The geothermal system includes: a ground heat source circulation pump 1, a plate heat exchanger 2, a hot water storage tank 3, and a ground heat source regulating valve 5; the urban heat network heating system includes a volume heat exchanger 4, a heat network circulation pump 6, and a heat network regulating valve 7. The volume heat exchanger 4 is connected to the urban heat network water supply and the urban heat network return water. The heat network circulation pump 6 is connected to the user-side water supply. The plate heat exchanger 2 is connected to the user-side return water.

[0032] During the non-heating season, when in use, first close the heat network regulating valve 7 and open the ground heat source regulating valve 5. The ground heat source circulation pump 1 of the geothermal system sends the medium from the hot water storage tank 3 into the plate heat exchanger 2 for heat exchange. After the hot water releases heat, it flows back into the hot water storage tank 3, and the geothermal energy is reused to store heat. The hot water obtained through the plate heat exchanger 2 is sent to the heat user through the heat network circulation pump 6, and the heat network return water after consuming heat re-enters the plate heat exchanger 2 to complete the cycle.

[0033] During the heating season, when in use, domestic hot water is provided by the heat network heating system. After the heating of the urban heat network heating system starts, close the ground heat source regulating valve 5 and open the heat network regulating valve 7. The heat network return water enters the volume heat exchanger 4 and is heated by the high-temperature water of the urban heat network, and then is supplied to the heat user through the heat network circulation pump 6 to provide domestic hot water.

[0034] Specifically, the models of the ground heat source circulation pump 1 and the heat network circulation pump 6 are TP 100-1410 / 2, with a head of 120 m and a flow rate of 320 m 3 / h. Flexible connections shall be provided at the inlets and outlets of the ground heat source circulation pump 1 and the heat network circulation pump 6, and welded ball valves shall be installed on the connected pipelines. Pressure gauges, thermometers and welded ball valves shall be installed on the pipelines of the plate heat exchanger 2 and the volume heat exchanger 4 to monitor and adjust the operation of the pipe network.

[0035] Specifically, the hot water storage tank 3 is placed 100 m underground with a volume of 320 m 3 , and materials with relatively large heat transfer coefficients such as aluminum and copper are selected, which can better exchange heat with the ground surface. A 0.5 cm thick layer of metallic chromium is plated on the inner and outer sides of the water tank to isolate oxygen and prevent oxidation, thus extending the service life.

[0036] Specifically, the heat network regulating valve 7 is connected to the pipeline by a welded ball valve. It is opened in the non-heating season for geothermal heating and closed in the heating season for heat network heating, which plays a role in regulating the operation of the heat network. The ground heat source regulating valve 5 is connected to the pipeline by a welded ball valve. It is closed in the heating season for geothermal heating and closed in the heating season for heat network heating, which plays a role in regulating the operation of the heat network.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new domestic hot water supply system coupling geothermal energy and urban heat network, comprising a geothermal system and an urban heat network heating system, characterized in that: The geothermal system includes a geothermal source circulation pump (1), a plate heat exchanger (2), a hot water storage tank (3), and a geothermal source regulating valve (5); The urban heat supply network system includes a volume heat exchanger (4), a heat network circulation pump (6), and a heat network regulating valve (7).

2. The novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, wherein: The volume heat exchanger (4) is connected to the urban heat supply network water supply and the urban heat supply network water return.

3. A novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, characterized in that: The heat network circulation pump (6) is connected to the user end water supply, and the plate heat exchanger (2) is connected to the user end water return.

4. A novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, characterized in that: The inlets and outlets of the geothermal source circulation pump (1) and the heat network circulation pump (6) are soft-connected to the pipelines, and welded ball valves are provided on the connected pipelines.

5. A novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, characterized in that: Pressure gauges, thermometers, and welded ball valves are provided on the connecting pipelines of the plate heat exchanger (2) and the volume heat exchanger (4).

6. A novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, characterized in that: The hot water storage tank (3) is made of aluminum and copper materials and is plated with a 0.5 cm layer of metallic chromium on the inner and outer layers.

7. A novel domestic hot water supply system coupling geothermal energy and urban heat network according to claim 1, characterized in that: Both the geothermal source regulating valve (5) and the heat network regulating valve (7) are connected to the pipelines by using welded ball valves.

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