Multi-energy complementary comprehensive utilization system based on zero-carbon building

Abstract

The invention discloses a multi-energy complementary comprehensive utilization system based on a zero-carbon building, which belongs to the technical field of zero-carbon buildings and comprises a ground source heat pump unit, a photovoltaic solar panel, a heat supply water tank and an air source heat pump hot water unit. The ground source heat pump unit is connected with the third water segregator, the ground heat exchanger and the fourth water segregator through pipelines. The ground source heat pump unit is connected with the second water segregator and the first water segregator through pipelines; the ground source heat pump unit is connected with the second water segregator, the heat supply water tank and the first water segregator through pipelines. The photovoltaic solar cell panel is connected with the third water segregator, the ground heat exchanger and the fourth water segregator; the hot water supply tank is connected with the air source heat pump hot water unit; and the fourth water segregator is connected with the photovoltaic solar cell panel and the third water segregator. Various complementary energy supply modes of solar energy, geothermal energy and air energy are achieved, the power generation efficiency of the photovoltaic solar cell panel is improved, and meanwhile the geothermal energy is supplemented to improve the utilization efficiency of the geothermal energy and the solar energy.

Description

Technical Field

[0001] The present invention relates to the technical field of zero-carbon buildings, and in particular to a multi-energy complementary comprehensive utilization system based on zero-carbon buildings. Background Art

[0002] my country's construction sector currently accounts for approximately one-third of the nation's total carbon emissions. Air conditioning and heating account for 30-40% of total building energy consumption, while domestic hot water contributes approximately 20%. Selecting efficient, clean energy sources to reduce building carbon emissions is crucial for the construction industry to achieve its dual carbon goals.

[0003] Currently, various energy-consuming equipment and clean energy sources in the construction industry have their own advantages and disadvantages. For example, the increase in temperature during the power generation process of solar cell modules will significantly reduce the output performance of photovoltaic modules. Studies have shown that the output power decreases by 0.35% to 0.4% for every 1°C increase in temperature, and it will accelerate the aging of battery modules. The operating efficiency of air-source heat pump water heaters is significantly affected by operating conditions and the outdoor environment. During the operation of ground-source heat pump units, the heat discharged into the soil in summer is usually greater than the heat absorbed from the soil in winter. To ensure soil thermal balance, some units are usually equipped with separate cooling towers, which not only increases investment but also reduces unit efficiency.

[0004] The existing clean energy sources cannot be fully utilized, and the existing energy-consuming equipment has low energy efficiency, which affects the utilization efficiency of clean energy. Summary of the Invention

[0005] In response to some existing problems, the purpose of the present invention is to provide a multi-energy complementary comprehensive utilization system based on zero-carbon buildings to solve the current problems that various clean energy sources cannot be fully utilized and the energy efficiency of energy-consuming equipment is low.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-energy complementary comprehensive utilization system based on a zero-carbon building includes a ground source heat pump unit, a photovoltaic solar panel, a hot water tank and an air source heat pump hot water unit; the ground source heat pump unit is connected in sequence through a pipeline to a third water distributor, a buried pipe heat exchanger and a fourth water distributor to form a first circulation loop; the ground source heat pump unit is connected in sequence through a pipeline to a second water distributor and a first water distributor to form a second circulation loop; the ground source heat pump unit is connected in sequence through a pipeline to a second water distributor, a hot water tank and a first water distributor to form a third circulation loop; the photovoltaic solar panel is connected in sequence to the third water distributor, the buried pipe heat exchanger and a fourth water distributor to form a fourth circulation loop; the hot water tank is connected to the air source heat pump hot water unit; the fourth water distributor is connected to the inlet end of the photovoltaic solar panel, and the outlet end of the photovoltaic solar panel is connected to the third water distributor; a heat exchanger is installed in the hot water tank.

[0008] As a further solution of the present invention: electric water valves are installed on the pipelines.

[0009] As a further solution of the present invention: a first water pump is provided on the pipe connecting the hot water tank and the air source heat pump water heater unit.

[0010] As a further solution of the present invention: a second water pump is provided on the pipeline connecting the first water distributor and the ground source heat pump unit.

[0011] As a further solution of the present invention: a third water pump is provided on the pipeline connecting the fourth water distributor and the ground source heat pump unit.

[0012] As a further solution of the present invention: a fourth water pump is provided on the pipeline connecting the third water distributor and the photovoltaic solar panel.

[0013] As a further solution of the present invention: the second water distributor, the first water distributor and the air conditioner user supply and return water pipes are connected.

[0014] As a further solution of the present invention: the hot water supply tank is connected to the domestic hot water supply pipeline and the domestic hot water pipeline return water.

[0015] As a further solution of the present invention: the hot water supply tank is connected to the tap water replenishment pipe.

[0016] As a further solution of the present invention: the first water distributor, the second water distributor, the third water distributor and the fourth water distributor are all connected to a constant pressure water supply system.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The multi-energy complementary comprehensive utilization system based on zero-carbon buildings of the present invention realizes multiple complementary energy supply modes of solar energy, geothermal energy and air energy, improves the power generation efficiency of photovoltaic solar panels, and at the same time improves the utilization efficiency of geothermal energy and solar energy by supplementing geothermal energy. Since the outdoor temperature is low in winter, the energy efficiency of the air source heat pump water heater unit is very low. Using the ground source heat pump unit to preheat domestic hot water effectively reduces the energy consumption of domestic hot water heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a multi-energy complementary comprehensive utilization system based on zero-carbon buildings.

[0020] Figure 2 This is a schematic diagram of summer cooling and domestic hot water supply for a multi-energy complementary comprehensive utilization system based on a zero-carbon building.

[0021] Figure 3This is a schematic diagram of winter heating and domestic hot water supply for a multi-energy complementary comprehensive utilization system based on a zero-carbon building.

[0022] In the figure: 1. Ground source heat pump unit; 2. Photovoltaic solar panel; 3. Hot water tank; 4. Air source heat pump hot water unit; 5. First water pump; 6. Second water pump; 7. Third water pump; 8. Fourth water pump; 9. Buried pipe heat exchanger; 10. Heat exchanger; 11. First water distributor; 12. Second water distributor; 13. Third water distributor; 14. Fourth water distributor. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "provided with," "connected," and "connected" should be understood in a broad sense; for example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections via an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0025] The present invention is a multi-energy complementary comprehensive utilization system based on zero-carbon buildings, which realizes multiple complementary energy supply modes of solar energy, geothermal energy and air energy, improves the power generation efficiency of photovoltaic solar panels, and at the same time supplements geothermal energy to improve the utilization efficiency of geothermal energy and solar energy. The patent of this invention utilizes clean energy such as geothermal, solar energy, and air energy to form a multi-energy complementary system, which ensures the full utilization of various clean energy sources while effectively reducing the energy consumption of various energy-consuming equipment in the building.

[0026] See also Figure 1-3 , a multi-energy complementary comprehensive utilization system based on zero-carbon buildings, including a ground source heat pump unit 1, a photovoltaic solar panel 2, a hot water tank 3 and an air source heat pump hot water unit 4;

[0027] The ground source heat pump unit 1 is connected in sequence through a pipeline and the third water distributor 13, the buried pipe heat exchanger 9, and the fourth water distributor 14 to form a first circulation loop;

[0028] The ground source heat pump unit 1 is connected in sequence through a pipeline to the second water distributor 12 and the first water distributor 11 to form a second circulation loop;

[0029] The ground source heat pump unit 1 is connected in sequence through a pipeline and a second water distributor 12, a hot water tank 3, and a first water distributor 11 to form a third circulation loop;

[0030] The photovoltaic solar panel 2, the third water distributor 13, the underground heat exchanger 9, and the fourth water distributor 14 are sequentially connected to form a fourth circulation loop;

[0031] The hot water tank 3 is connected to the air source heat pump water heater 4. Due to the low outdoor temperature in winter, the energy efficiency of the air source heat pump water heater is very low. The use of the ground source heat pump unit to preheat domestic hot water effectively reduces the energy consumption of domestic hot water heating.

[0032] The fourth water distributor 14 is connected to the inlet end of the photovoltaic solar panel 2, and the outlet end of the photovoltaic solar panel 2 is connected to the third water distributor 13;

[0033] A heat exchanger 10 is installed in the hot water tank 3;

[0034] Electric water valves are installed on the pipelines;

[0035] A first water pump 5 is provided on the pipe connecting the hot water tank 3 and the air source heat pump water heater unit 4;

[0036] A second water pump 6 is provided on the pipe connecting the first water distributor 11 and the ground source heat pump unit 1;

[0037] A third water pump 7 is provided on the pipeline connecting the fourth water distributor 14 and the ground source heat pump unit 1;

[0038] A fourth water pump 8 is provided on the pipe connecting the third water distributor 13 and the photovoltaic solar panel 2;

[0039] The second water distributor 12, the first water distributor 11 and the air conditioning user supply and return water are connected;

[0040] The hot water tank 3 is connected to the domestic hot water supply pipe and the domestic hot water pipe return water;

[0041] The hot water tank 3 is connected to the tap water supply pipe;

[0042] The first water distributor 11 , the second water distributor 12 , the third water distributor 13 and the fourth water distributor 14 are all connected to the constant pressure water supply system.

[0043] This zero-carbon building multi-energy complementary system achieves efficient energy utilization by integrating technologies such as ground-source heat pumps, photovoltaic thermal energy, and air-source heat pumps. The functions and beneficial effects of each component are as follows:

[0044] The ground-source heat pump unit 1 is the core energy conversion device, using a buried heat exchanger to extract low-level heat from the soil to provide cooling / heating for air conditioning and domestic hot water. Its high efficiency and stability reduce the energy consumption of traditional air conditioning and achieve zero-carbon utilization of geothermal energy.

[0045] Photovoltaic solar panels directly power the system and cool the panels through the fourth circulation loop, improving power generation efficiency while recovering waste heat. The overall efficiency is greatly improved, realizing the coordinated utilization of solar energy "photovoltaic-photothermal".

[0046] The hot water tank has 3 thermal energy storage centers and a built-in heat exchanger to achieve: ground source heat pump heat storage, photovoltaic waste heat recovery, air source heat pump auxiliary heating and multiple heat sources complement each other to ensure 24-hour hot water supply. The water tank temperature stratification design greatly improves thermal efficiency.

[0047] The air-source heat pump water heater 4 can provide auxiliary heating during extreme weather or high load conditions. It complements the ground-source heat pump to address winter soil thermal imbalance. This patented system utilizes clean energy sources such as geothermal, solar, and air energy to create a multi-energy complementary system. This system ensures full utilization of all clean energy sources while effectively reducing energy consumption across the building's energy-consuming equipment.

[0048] The underground heat exchanger 9 and the ground source heat pump form a closed loop to achieve heat exchange between the soil and the building. The underground soil temperature is stable, which is more energy-efficient than air source heat pumps.

[0049] Intelligent distribution function of the water distributor system: dynamic distribution between the first water distributor 11, the second water distributor 12 and the air conditioning water system; cyclic switching between photovoltaic cooling and ground source heat pump between the third water distributor 13 and the fourth water distributor 14; automatic switching between 8 operating modes achieved by electric valve linkage control, greatly improving the system energy efficiency.

[0050] The pump group adjusts the flow rate of each circuit according to the load. The constant pressure water supply system maintains stable system pressure to prevent cavitation, extend equipment life, and ensure safe system operation.

[0051] The ground source heat pump unit 1 is connected to form a first circulation loop, which discharges indoor heat into the soil to lower the indoor temperature in summer, and extracts heat energy for heating and domestic hot water in winter; the ground source heat pump unit 1 forms a second circulation loop, which provides cooling in summer and heating in winter for users; the ground source heat pump unit 1 is connected to form a third circulation loop. The lower the outdoor ambient temperature, the lower the energy efficiency of the air source heat pump hot water unit 4. Relying entirely on the air source heat pump hot water unit 4 to provide domestic hot water greatly increases the energy consumption of the building. The ground source heat pump unit 1 is used to preheat the domestic hot water, reducing the use of the inefficient air source heat pump hot water unit 4 and maintaining the thermal balance of the soil. Usually in areas with hot summers and cold winters, since the heat dissipation in summer is greater than the heat absorption in winter, the ground source heat pump unit 1 needs to add a cooling tower to dissipate heat in summer. The present invention avoids the occurrence of this problem and reduces the energy consumption of domestic hot water supply in winter.

[0052] In this embodiment, the photovoltaic solar panel 2 and the ground-mounted heat exchanger 9 form a fourth circulation loop. When the temperature of the photovoltaic solar panel 2 exceeds 25°C during summer power generation, the circulating water pump 8 is activated to dissipate heat from the solar panel, improving the output performance of the photovoltaic solar panel 2. This simultaneously replenishes heat from the soil for winter air conditioning and domestic hot water, ensuring soil thermal balance while increasing the photovoltaic solar panel's power generation. The electricity generated by the photovoltaic solar panel 2 is used by electrical equipment such as the ground-source heat pump unit 1 and the air-source heat pump water heater unit 4.

[0053] In this embodiment, the air source heat pump water heater unit 4 is connected with the hot water tank 3 and the water pump 5 to form a fifth circulation loop. In summer, the air source heat pump water heater unit 4 is used to heat the domestic hot water in the hot water tank 3, and electricity is efficiently converted into thermal energy. The ground source heat pump unit 1 forms a third circulation loop. In winter, the temperature meter in the hot water tank 3 is combined to control the water tank heating heat source. When the temperature of the domestic hot water in the hot water tank 3 is lower than 40°C, the ground source heat pump unit 1 is started to form a third circulation loop through the pipeline with the heat exchanger 10 to preheat the domestic hot water. When the temperature of the domestic hot water in the hot water tank 3 is higher than 40°C and lower than 55°C, the air source heat pump water heater unit 4 is started to connect with the hot water tank 3 and the water pump 5 to form a fifth circulation loop to heat the domestic hot water in the hot water tank 3 to 55°C.

[0054] In this embodiment, the hot water tank 3 is connected with the domestic hot water supply and domestic hot water return to form a sixth circulation loop, providing the domestic hot water required for the user's daily life.

[0055] In this embodiment, the water distributor (collector) (11-14) is connected to the constant pressure water supply system to replenish water and stabilize the pressure of the system.

[0056] In this embodiment, the hot water supply tank 3 is connected to the tap water supply to supply domestic hot water.

[0057] Innovative technical effects of this invention:

[0058] Multi-energy synergy: Through the triple energy coupling of photovoltaic power generation + solar thermal recovery + ground source / air source heat pump, the comprehensive energy utilization rate is greatly improved.

[0059] Intelligent control: Based on temperature / load sensor data, it automatically switches between multiple working modes, such as photovoltaic priority cooling in summer and ground source heat pump dominance in winter.

[0060] Zero-carbon operation: The proportion of renewable energy has increased significantly, greatly reducing carbon emissions compared to traditional systems.

[0061] The system of the present invention can greatly reduce the overall energy consumption of the building, greatly reduce the energy consumption of domestic hot water, and greatly increase the proportion of photovoltaic self-used electricity.

[0062] The patented invention utilizes clean energy such as geothermal energy, solar energy, and air energy to form a multi-energy complementary system, which ensures the full utilization of each clean energy source and effectively reduces the energy consumption of various energy-consuming equipment in the building.

[0063] The multi-energy complementary comprehensive utilization system based on zero-carbon buildings of the present invention realizes multiple complementary energy supply modes of solar energy, geothermal energy and air energy, improves the power generation efficiency of photovoltaic solar panels, and at the same time improves the utilization efficiency of geothermal energy and solar energy by supplementing geothermal energy. Since the outdoor temperature is low in winter, the energy efficiency of the air source heat pump water heater unit is very low. Using the ground source heat pump unit to preheat domestic hot water effectively reduces the energy consumption of domestic hot water heating.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The embodiments should, therefore, be considered in all respects as illustrative and non-restrictive. The scope of the invention is defined by the appended claims rather than the foregoing description, and all changes coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0065] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-energy complementary comprehensive utilization system based on zero-carbon buildings, characterized by: The invention comprises a ground source heat pump unit (1), a photovoltaic solar panel (2), a hot water tank (3) and an air source heat pump hot water unit (4); the ground source heat pump unit (1) is connected in sequence through a pipeline and a third water distributor (13), a buried pipe heat exchanger (9) and a fourth water distributor (14) to form a first circulation loop; the ground source heat pump unit (1) is connected in sequence through a pipeline and a second water distributor (12) and a first water distributor (11) to form a second circulation loop; the ground source heat pump unit (1) is connected in sequence through a pipeline and a second water distributor (12) and a hot water tank (3) to form a second circulation loop; The hot water tank (3) and the first water distributor (11) are connected in sequence to form a third circulation loop; the photovoltaic solar panel (2) and the third water distributor (13), the buried pipe heat exchanger (9), and the fourth water distributor (14) are connected in sequence to form a fourth circulation loop; the hot water tank (3) and the air source heat pump water heater (4) are connected; the fourth water distributor (14) and the inlet end of the photovoltaic solar panel (2) are connected, and the outlet end of the photovoltaic solar panel (2) and the third water distributor (13) are connected; and a heat exchanger (10) is installed in the hot water tank (3).

2. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 1 is characterized in that: The pipelines are all equipped with electric water valves.

3. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 2 is characterized in that: A first water pump (5) is provided on the pipe connecting the hot water supply tank (3) and the air source heat pump hot water unit (4).

4. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 3 is characterized in that: A second water pump (6) is provided on the pipeline connecting the first water distributor (11) and the ground source heat pump unit (1).

5. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 4 is characterized in that: A third water pump (7) is provided on the pipeline connecting the fourth water distributor (14) and the ground source heat pump unit (1).

6. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 5 is characterized in that: A fourth water pump (8) is provided on the pipeline connecting the third water distributor (13) and the photovoltaic solar panel (2).

7. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 6 is characterized in that: The second water distributor (12), the first water distributor (11) and the air conditioner user water supply and return pipes are connected.

8. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 7 is characterized in that: The hot water supply tank (3) is connected to the domestic hot water supply pipeline and the domestic hot water pipeline return water.

9. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 8 is characterized in that: The hot water supply tank (3) is connected to the tap water supply pipe.

10. The multi-energy complementary comprehensive utilization system based on zero-carbon building according to claim 9 is characterized in that: The first water distributor (11), the second water distributor (12), the third water distributor (13), and the fourth water distributor (14) are all connected to the constant pressure water supply system.

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