Comprehensive energy heat supply and cold supply system in northern area

Abstract

The utility model relates to the technical field of heat supply and cold supply, in particular to a comprehensive energy heat supply and cold supply system in northern areas. According to the technical scheme, an energy storage battery assembly is electrically connected with a carbon dioxide heat pump and a shallow ground source heat pump, current on the energy storage battery assembly flows to the carbon dioxide heat pump and the shallow ground source heat pump, and a water inlet pipe and a water outlet pipe are fixedly installed on each of the carbon dioxide heat pump and the shallow ground source heat pump. Cold energy from an underground shallow layer is absorbed through the carbon dioxide heat pump and the shallow layer ground source heat pump in summer, cold water is formed through cooling to be supplied for use, cold energy is provided in summer, and heated return water is used for backflow heat storage after use; in winter, the carbon dioxide heat pump and the shallow layer ground source heat pump absorb heat energy from the underground shallow layer, hot water is formed through temperature rise to be supplied for use, cold water is formed through hot water heat exchange, heat energy is provided in winter, and cooled return water is subjected to backflow cold storage.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and cooling, in particular to a comprehensive energy heating and cooling system for northern regions. Background Art

[0002] Integrated energy maximizes the use of renewable energy through the application of smart microgrids, smart microheat networks and energy storage technologies. Based on the endowments of different energy sources, in accordance with the idea of ​​multi-energy complementarity and integration of cooling, heating, electricity and water, it gives priority to the use of local renewable energy (urban waste energy, solar energy, shallow geothermal energy, medium and deep geothermal energy, etc.) to minimize the use of fossil energy. The integrated energy station project + smart energy microgrid system adopts an integrated design of heating, cooling, electricity, gas and water supply. Compared with building a set of systems for cooling, heating, electricity and water separately, it can not only effectively reduce facility investment and operation and maintenance costs, but also greatly improve energy utilization efficiency.

[0003] The method of shallow underground heat source conduction heating is through ground source heat pump technology. The ground source heat pump realizes the transfer of low temperature heat energy to high temperature heat energy by inputting a small amount of high-quality energy (such as electricity). The ground energy is used as the heat source for heat pump heating in winter and the cold source for cooling in summer. That is, in winter, the heat in the ground energy is taken out, the temperature is increased, and then supplied to indoor heating; in summer, the indoor heat is taken out and released into the ground energy. Usually, the ground source heat pump consumes 1kWh of energy, and the user can get more than 4.4kWh of heat or cold.

[0004] However, the underground heat source conducts slowly, and after years of continuous shallow geothermal heat extraction, the water supply temperature will decrease year by year, and the heating effect of the ground source heat pump will decrease, unable to meet the heating demand. Utility Model Content

[0005] The utility model aims to solve the problem in the background technology that the temperature of underground heat source decays year by year and cannot meet the heating demand, and proposes a comprehensive energy heating and cooling system for the northern region.

[0006] The technical solution of the utility model is a comprehensive energy heating and cooling system for the northern region, comprising:

[0007] An energy storage battery assembly, wherein the energy storage battery assembly is electrically connected to a cogeneration device and a solar panel through electric wires, and current from the cogeneration device and the solar panel flows to the energy storage battery assembly;

[0008] The energy storage battery assembly is electrically connected to the carbon dioxide heat pump and the shallow geothermal heat pump, the current on the energy storage battery assembly flows to the carbon dioxide heat pump and the shallow geothermal heat pump, the shallow geothermal heat pump is fixedly installed with a water inlet pipe and a water outlet pipe, the ends of the water inlet pipe and the water outlet pipe of the shallow geothermal heat pump are fixedly connected to the shallow underground water pipe, the ends of the water inlet pipe and the water outlet pipe of the carbon dioxide heat pump are fixedly connected to the heat pump pipeline, and the other ends of the water inlet pipe and the water outlet pipe of the carbon dioxide heat pump and the shallow geothermal heat pump are connected to the water pipes of the office building and the residential area.

[0009] Optionally, the carbon dioxide heat pump and the shallow ground source heat pump are powered by three modes, namely, power supply from a combined heat and power generation device, power supply from a solar panel, and power supply from the mains. The carbon dioxide heat pump and the shallow ground source heat pump are electrically connected to the mains power lines. The outer wall of the carbon dioxide heat pump is fixedly connected to a heat pump pipe, which exchanges heat with the atmosphere, absorbing heat from the air in winter and dissipating heat into the air in summer.

[0010] Optionally, in summer, the carbon dioxide heat pump and the shallow ground source heat pump lower the water temperature in the water inlet pipe, and the cooled water flows into office buildings and residential areas for heat exchange and cooling, and the water inlet pipe and outlet pipe of the cogeneration device are connected to the shallow underground water pipe; in winter, the carbon dioxide heat pump and the shallow ground source heat pump increase the water temperature in the water inlet pipe, and the heated water flows into office buildings and residential areas for heat exchange and heating, and the water in the water inlet pipe and outlet pipe of the cogeneration device flows through office buildings and residential areas.

[0011] Optionally, the energy storage battery assembly includes a main energy storage battery, a backup energy storage battery, an intermediate box and a button switch, wherein the intermediate box is fixedly installed between the main energy storage battery and the backup energy storage battery, and a button switch is fixedly installed inside the intermediate box.

[0012] Optionally, the main energy storage battery and the backup energy storage battery are fixedly connected to power supply lines from a cogeneration device and a solar panel, and the power supply lines connected to the main energy storage battery and the backup energy storage battery are interconnected via a button switch.

[0013] Optionally, an iron core is fixedly installed inside the intermediate box and directly above the push button switch, the iron core is wound around the power supply line connected to the main energy storage battery, a pressure block is arranged between the iron core and the push button switch, the pressure block is one of an iron block, a cobalt block or a nickel block, and the bottom of the pressure block is in contact with the push button switch.

[0014] Optionally, a guide rod is fixedly installed inside the push button switch, the pressing block slides on the guide rod, and a blocking plate is fixedly installed on the top of the guide rod.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model uses a carbon dioxide heat pump to absorb cold energy in the air and cold energy from the shallow underground layer in summer. The shallow ground source heat pump absorbs cold energy from the shallow underground layer in summer to provide cold energy in summer, and forms cold water for supply and use by cooling down. The temperature of the cold water after use rises and returns to the water for reflux and heat storage. In winter, the carbon dioxide heat pump absorbs cold energy in the air and heat energy from the shallow underground layer respectively. The shallow ground source heat pump absorbs heat energy from the shallow underground layer in summer to provide cold energy in summer, and forms hot water for supply and use by heating up. The hot water is used for heat exchange to form cold water, and provides heat energy in winter. The hot water after use is cooled down and returns to the water for reflux and cold storage.

[0017] Furthermore, when the main energy storage battery is fully charged, no current flows in the power supply line connected to the main energy storage battery, the magnetic force of the electromagnet decreases, and the pressure block contacts the button switch under the action of gravity. At this time, the button switch switches the power supply direction, and the backup energy storage battery is used to store energy, storing excess energy on sunny days and supplementing the electricity consumption of the carbon dioxide heat pump and the shallow ground source heat pump on cloudy days. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of shallow ground source heat pump heating in one embodiment of the utility model is given;

[0019] Figure 2 A schematic diagram of a shallow ground source heat pump cooling system according to an embodiment of the utility model is given;

[0020] Figure 3 A schematic diagram of the main energy storage battery structure of an embodiment of the utility model is given;

[0021] Figure 4 A schematic front and cross-sectional view of an intermediate structure of an embodiment of the utility model is given.

[0022] Figure numerals: 1. Shallow underground water pipe; 2. Solar panel; 3. Energy storage battery assembly; 31. Main energy storage battery; 32. Backup energy storage battery; 33. Intermediate box; 34. Iron core; 35. Push button switch; 36. Pressure block; 37. Guide rod; 4. AC power line; 5. Heat pump pipeline; 6. Carbon dioxide heat pump; 7. Shallow ground source heat pump; 8. Combined heat and power device. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] This embodiment proposes a comprehensive energy heating and cooling system for northern regions, such as Figure 1 and 2 As shown, it includes an energy storage battery assembly 3, which is electrically connected to a cogeneration device 8 and a solar panel 2 through electric wires. The current on the cogeneration device 8 and the solar panel 2 flows to the energy storage battery assembly 3, and the cogeneration device 8 absorbs solar energy and converts it into electrical energy. The solar panel 2 uses natural gas or hydrogen-blended natural gas as energy, and the cogeneration device 8 and the solar panel 2 are both charged by the energy storage battery assembly 3.

[0030] like Figure 1 and 2As shown, the energy storage battery assembly 3 is electrically connected to the carbon dioxide heat pump 6 and the shallow ground source heat pump 7, and the current on the energy storage battery assembly 3 flows to the carbon dioxide heat pump 6 and the shallow ground source heat pump 7. The carbon dioxide heat pump 6 and the shallow ground source heat pump 7 are powered by three modes, namely, the combined heat and power supply device 8, the solar panel 2 and the mains power supply, wherein the combined heat and power supply device 8 and the solar panel 2 are transferred through the energy storage battery assembly 3. The carbon dioxide heat pump 6 and the shallow ground source heat pump 7 are electrically connected to the mains power line 4, and the outer wall of the carbon dioxide heat pump 6 is fixedly connected to the heat pump pipeline 5.

[0031] The carbon dioxide heat pump 6 and the shallow ground source heat pump 7 are both fixedly installed with water inlet pipes and water outlet pipes, the ends of which are fixedly connected to the heat pump pipeline 5 or the shallow underground water pipe 8, and the other ends of the water inlet pipes and water outlet pipes are connected to the water pipes of the office building and the residential area.

[0032] like Figure 2 As shown, in summer, the carbon dioxide heat pump 6 and the shallow ground source heat pump 7 reduce the water temperature in the water inlet pipe, and the cooled water flows into the office building and the residential area for heat exchange and cooling. The cooling mode is divided into carbon dioxide heat pump 6 cooling and shallow ground source heat pump 7 cooling. The carbon dioxide heat pump 6 uses electric energy to absorb the cold energy in the heat pump pipeline 5 or the shallow geothermal energy, cools the cold water to 7°C and transports it to the office building and the residential area in the form of cold water. After heat exchange in the office building and the residential area, the return water temperature is 12°C, and it is transported to the carbon dioxide heat pump 6 for reheat exchange and refrigeration. The cold water temperature provided by the shallow geothermal energy is 10°C, and the return water temperature after heat exchange is 30°C, which can not only store the heat energy generated by the carbon dioxide heat pump 6 in the shallow geothermal energy, but also provide cold energy for the carbon dioxide heat pump 6. Or the carbon dioxide heat pump 6 uses the refrigeration mechanism to cool, transfer the heat to the heat pump pipeline 5, and directly dissipate the heat to the air.

[0033] The shallow geothermal heat pump 7 uses electric energy to do work, absorbs cold energy from the shallow underground, cools the cold water to 7°C and transports it to office buildings and residential areas in the form of cold water. After heat exchange in office buildings and residential areas, the return water temperature is 12°C, and is transported to the shallow geothermal heat pump 7 for reheat exchange. The temperature of the groundwater extracted by the shallow geothermal heat pump 7 is 10°C, and the temperature of the returned groundwater is 30°C. The heat energy generated by the shallow geothermal heat pump 7 can be stored in the shallow geothermal heat, and a cold source is provided for the shallow geothermal heat pump 7.

[0034] like Figure 1As shown, in winter, the carbon dioxide heat pump 6 and the shallow ground source heat pump 7 increase the water temperature in the water inlet pipe, and the heated water flows into the office building and residential area for heat exchange and heating. The heating methods are divided into heating by the combined heat and power device 8, heating by the carbon dioxide heat pump 6 and heating by the shallow ground source heat pump 7. The waste heat temperature of the combined heat and power device 8 is 55°C-65°C, which is transported to the office building and residential area in the form of hot water. After heat exchange in the office building and residential area, the return water temperature is 40°C, which is transported to the combined heat and power device 8 for re-heat exchange, taking away the heat generated by the combined heat and power device 8, ensuring the normal operating temperature of the combined heat and power device 8, and can also provide heating for the office building and residential area.

[0035] The carbon dioxide heat pump 6 uses electrical energy to absorb heat from the air, heats the hot water to 60°C and transports it to office buildings and residential areas in the form of hot water. After heat exchange in the office buildings and residential areas, the return water temperature is 40°C and is transported to the carbon dioxide heat pump 6 for reheating.

[0036] The shallow geothermal heat pump 7 uses electric energy to do work, absorbs geothermal heat from the shallow underground layer, heats the hot water to 60°C and transports it to the office building and residential area in the form of hot water. After heat exchange in the office building and residential area, the return water temperature is 40°C, and is transported to the shallow geothermal heat pump 7 for reheat exchange. The temperature of the groundwater extracted by the shallow geothermal heat pump 7 is 20°C, and the temperature of the returned groundwater is 5°C.

[0037] The combined heat and power device 8 needs to dissipate heat in summer. The shallow geothermal provides groundwater at 10°C to enter the combined heat and power device 8. The temperature of the hot water generated after heat exchange is 30°C. The heat energy is stored underground through the returning groundwater, which can not only store the heat energy generated by the combined heat and power device 8 in the shallow geothermal, but also provide a cold source for the combined heat and power device 8.

[0038] In this embodiment, the carbon dioxide heat pump 6 and the shallow ground source heat pump 7 absorb cold energy from the shallow underground in summer, and form cold water for use by cooling down, so as to provide cold energy in summer, and after use, the heated return water is used for reflux heat storage;

[0039] In winter, the carbon dioxide heat pump 6 and the shallow ground source heat pump 7 absorb heat energy from the shallow underground layer, generate hot water by heating, and provide heat energy in winter, use hot water for heat exchange to generate cold water, and the return water after cooling is refluxed to store cold.

[0040] Example 2

[0041] Based on Example 1, this example proposes a comprehensive energy heating and cooling system for northern China, such as Figure 3As shown, the energy storage battery assembly 3 includes a main energy storage battery 31, a backup energy storage battery 32, an intermediate box 33 and a button switch 35. The intermediate box 33 is fixedly installed between the main energy storage battery 31 and the backup energy storage battery 32. Energy is stored by the main energy storage battery 31 and the backup energy storage battery 32. The backup energy storage battery 32 serves as a backup power source to power the carbon dioxide heat pump 6 and the shallow ground source heat pump 7.

[0042] like Figure 3 and 4 As shown, a button switch 35 is fixedly installed inside the intermediate box 33, and power supply lines from the cogeneration device 8 and the solar panel 2 are fixedly connected to the main energy storage battery 31 and the backup energy storage battery 32. The power supply lines connected to the main energy storage battery 31 and the backup energy storage battery 32 are connected to each other through the button switch 35. The button switch 35 is used to convert the current flow in the power supply line. When the energy stored in the main energy storage battery 31 reaches the rated value, the button switch 35 is used to convert the current flow. This prevents the main energy storage battery 31 from being damaged by excessive energy storage.

[0043] like Figure 4 As shown, an iron core 34 is fixedly installed inside the middle box 33 and directly above the button switch 35. The iron core 34 is wound around the power supply line connected to the main energy storage battery 31. A pressing block 36 is arranged between the iron core 34 and the button switch 35. The pressing block 36 is made of one of an iron block, a cobalt block or a nickel block, and the bottom of the pressing block 36 is in contact with the button switch 35.

[0044] When the main energy storage battery 31 is charged, the power supply line on the main energy storage battery 31 and the iron core 34 form an electromagnet and attract the pressing block 36, so that the pressing block 36 moves upward and separates from the button switch 35. When the main energy storage battery 31 is fully charged, no current flows in the power supply line connected to the main energy storage battery 31, the magnetic force of the electromagnet decreases, and the pressing block 36 contacts the button switch 35 under the action of gravity. At this time, the button switch 35 changes the direction of power supply and uses the backup energy storage battery 32 to store energy.

[0045] A guide rod 37 is fixedly installed inside the button switch 35, and the pressing block 36 slides on the guide rod 37. A blocking plate is fixedly installed on the top of the guide rod 37 to prevent the pressing block 36 from moving too much.

[0046] On sunny days, the solar panel 2 has a good power generation effect and generates a lot of electricity, which is enough to power the carbon dioxide heat pump 6 and the shallow ground source heat pump 7. There is also excess energy, which is stored in the backup energy storage battery 32. On cloudy days, the solar panel 2 has a poor power generation effect and the power supply is insufficient to power the carbon dioxide heat pump 6 and the shallow ground source heat pump 7. The backup energy storage battery 32 is used to make up for the missing energy.

[0047] In this embodiment, the main energy storage battery 31 is fully charged, no current flows in the power supply line connected to the main energy storage battery 31, the magnetic force of the electromagnet is reduced, and the pressing block 36 contacts the button switch 35 under the action of gravity. At this time, the button switch 35 switches the power supply direction, and the backup energy storage battery 32 is used to store energy, storing excess energy on sunny days and supplementing the power consumption of the carbon dioxide heat pump 6 and the shallow ground source heat pump 7 on cloudy days.

[0048] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A comprehensive energy heating and cooling system for the northern region, characterized in that: include: An energy storage battery assembly (3), wherein the energy storage battery assembly (3) is electrically connected to a combined heat and power generation device (8) and a solar panel (2) via electric wires, and current from the combined heat and power generation device (8) and the solar panel (2) flows to the energy storage battery assembly (3); The energy storage battery assembly (3) is electrically connected to a carbon dioxide heat pump (6) and a shallow ground source heat pump (7); the current on the energy storage battery assembly (3) flows to the carbon dioxide heat pump (6) and the shallow ground source heat pump (7); a water inlet pipe and a water outlet pipe are fixedly installed on the carbon dioxide heat pump (6) and the shallow ground source heat pump (7); the ends of the water inlet pipe and the water outlet pipe of the shallow ground source heat pump (7) are fixedly connected to a shallow underground water pipe (1); the ends of the water inlet pipe and the water outlet pipe of the carbon dioxide heat pump (6) are fixedly connected to a heat pump pipeline (5); and the other ends of the water inlet pipe and the water outlet pipe of the carbon dioxide heat pump (6) and the shallow ground source heat pump (7) are connected to water pipes of an office building and a residential area.

2. The integrated energy heating and cooling system for northern China according to claim 1, characterized in that: The carbon dioxide heat pump (6) and the shallow ground source heat pump (7) are powered by three types of electricity, namely, power supply by a combined heat and power generation device (8), power supply by a solar panel (2), and power supply by a mains electricity supply. The carbon dioxide heat pump (6) and the shallow ground source heat pump (7) are electrically connected to a mains electricity line (4). The outer wall of the carbon dioxide heat pump (6) is fixedly connected to a heat pump pipe (5) for exchanging heat with the air, providing heat energy to the carbon dioxide heat pump (6) in winter and providing cold energy to the carbon dioxide heat pump (6) in summer.

3. The integrated energy heating and cooling system for northern China according to claim 1, characterized in that: In summer, the carbon dioxide heat pump (6) and the shallow ground source heat pump (7) reduce the water temperature in the water inlet pipe, and the cooled water flows into the office building and the residential area for heat exchange and cooling. The water inlet pipe and the water outlet pipe of the combined heat and power supply device (8) are connected to the shallow underground water pipe (1); in winter, the carbon dioxide heat pump (6) and the shallow ground source heat pump (7) increase the water temperature in the water inlet pipe, and the heated water flows into the office building and the residential area for heat exchange and heating. The water in the water inlet pipe and the water outlet pipe of the combined heat and power supply device (8) flows through the office building and the residential area.

4. The integrated energy heating and cooling system for northern China according to claim 1, characterized in that: The energy storage battery assembly (3) comprises a main energy storage battery (31), a backup energy storage battery (32), an intermediate box (33) and a button switch (35); the intermediate box (33) is fixedly installed between the main energy storage battery (31) and the backup energy storage battery (32); and the button switch (35) is fixedly installed inside the intermediate box (33).

5. The integrated energy heating and cooling system for northern China according to claim 4, characterized in that: The main energy storage battery (31) and the backup energy storage battery (32) are both fixedly connected to power supply lines from the combined heat and power generation device (8) and the solar panel (2), and the power supply lines connected to the main energy storage battery (31) and the backup energy storage battery (32) are connected to each other via a button switch (35).

6. The integrated energy heating and cooling system for northern China according to claim 5, characterized in that: An iron core (34) is fixedly installed inside the intermediate box (33) and directly above the push button switch (35). The iron core (34) is wound around a power supply line connected to the main energy storage battery (31). A pressing block (36) is provided between the iron core (34) and the push button switch (35). The pressing block (36) is made of one of an iron block, a cobalt block or a nickel block. The bottom of the pressing block (36) is in contact with the push button switch (35).

7. The integrated energy heating and cooling system for northern China according to claim 6, characterized in that: A guide rod (37) is fixedly installed inside the button switch (35), the pressing block (36) slides on the guide rod (37), and a blocking plate is fixedly installed on the top of the guide rod (37).

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