A building energy system integrating electrical energy storage and air energy storage

Abstract

This application relates to a building energy system integrating electric energy storage and air source energy storage, comprising a power supply module, an electric energy storage module, a switch, an outdoor unit, and an air source energy storage module. The upstream of the switch is connected to both the power supply module and the electric energy storage module, and the downstream of the switch is connected to both the outdoor unit and a power-consuming unit within the building. An air source energy storage module is also installed within the building, and the outdoor unit is connected to the air source energy storage module. This energy system comprehensively utilizes both electric and air source energy storage modules, making the promotion and application of electric energy storage on the user side possible.

Description

Technical Field

[0001] This application relates to a building energy system that integrates electrical energy storage and air energy storage. Background Technology

[0002] Building electricity consumption accounts for over 20% of the nation's total electricity consumption and is showing a continuous upward trend, necessitating increased investment in building power infrastructure. Air conditioning consumes the vast majority of building energy. Therefore, improving building insulation and air conditioning energy efficiency ratios are effective measures to reduce building energy consumption. Since air conditioning involves raising and lowering the temperature of the air inside the building during cooling and heating, but air has a very low specific heat capacity, air-source heat pumps cannot be used for peak-valley electricity utilization. Furthermore, due to the high operating power of air conditioning units, directly using electrical energy storage to store energy during off-peak hours and release it during peak hours would require a very large storage capacity and energy volume. This would result in bulky electrical energy storage devices that cannot be installed within the building area, leading to excessively high economic investment and a long payback period.

[0003] The core indicators of electric energy storage facilities can be summarized as "power, energy, efficiency, lifespan, and response." Rated power represents the maximum instantaneous charge and discharge capacity of the energy storage system, determining how much load it can handle. Rated energy represents the total amount of electricity that can be continuously discharged at rated power; the ratio of the two is the "duration." Energy conversion efficiency refers to the ratio of output energy to input energy, measuring the losses during round-trip charging and discharging. Cycle life refers to the time required for a battery to complete one full charge and discharge cycle; the requirements for energy storage scenarios are much higher than for power batteries. For example, lithium iron phosphate energy storage cells have exceeded 6,000 cycles, with a target of 10,000-20,000 cycles. Response speed refers to the time required from receiving an instruction to the actual output, determining its agility in frequency regulation and peak shaving. Among these five core indicators, power and energy determine the physical dimensions of the electric energy storage facility and are core elements in its cost structure.

[0004] Utilizing electric energy storage for peak shaving in the entire power system has greater social and economic benefits, but current investments are mainly on the power source and grid sides. On the user side, due to the large proportion of energy consumption from air conditioning, and other energy-consuming products such as refrigerators and water heaters, it is very difficult to implement and promote electric energy storage. Therefore, only by combining various means, such as rationally changing the energy consumption required for cooling and heating in buildings or the required energy storage capacity, can the rational and economical use of electricity during peak and off-peak periods be effectively achieved, thereby enabling wider promotion and use on the user side. Utility Model Content

[0005] This application provides a building energy system that integrates electrical energy storage and air source energy storage, reducing the power requirements of the electrical energy storage and making the entire energy storage technology more economical. The technology of this application can be implemented in a single building unit, such as an individual apartment, or in a combination of multiple building units throughout the entire building.

[0006] This application relates to a building energy system that integrates electric energy storage and air energy storage, including a power supply module, an electric energy storage module, a switch, an outdoor unit, and an air energy storage module. The upstream of the switch is connected to the power supply module and the electric energy storage module, respectively, and the downstream of the switch is connected to the outdoor unit and the power consumption unit inside the building, respectively. An air energy storage module is also provided inside the building, and the outdoor unit and the air energy storage module are connected.

[0007] The air source energy storage module may include an energy storage heat exchanger, which may be disposed within an energy storage medium. The air source energy storage module may be disposed within at least one of the building's interior space or building structure. The energy storage medium may be at least one of a decorative layer or concrete. The outdoor unit may include a control module, an outdoor heat exchanger, a compressor, and a fan. The control module may be connected to the compressor and the fan. The compressor may be connected to the outdoor heat exchanger and the air source energy storage module to form a refrigerant circulation pipeline. A control valve may also be provided between the outdoor unit and the air source energy storage module. The outdoor unit may be connected to a second heat exchanger, which may be an indoor unit of an air conditioner, via the control valve. An intelligent control module may be installed on the switch, which may be connected to power-consuming units within the building via sensors.

[0008] The energy system of this application integrates electric energy storage and air energy storage modules. By using air energy storage modules to store the energy required for indoor cooling and heating facilities that consume a lot of energy, the power and capacity requirements of electric energy storage facilities can be reduced, the size of electric energy storage facilities can be reduced, and the economic efficiency of electric energy storage facilities can be greatly improved, making it possible to promote and apply electric energy storage on the user side. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the building energy system of this application.

[0010] Figure 2 This is a schematic diagram of another embodiment of the building energy system of this application.

[0011] Figure 3 This is a schematic diagram of the switcher of this application. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0013] like Figure 1 As shown, the building energy system integrating electrical energy storage and air source energy storage of this application includes a power supply module 1, an electrical energy storage module 2, a switch 3, an outdoor unit 4, and an air source energy storage module 5. The power supply module 1 includes conventional components such as an electricity meter, circuit breaker, or air switch, and is connected to an external power source. The electrical energy storage module 2 uses electrical energy storage technology to convert electrical energy into other forms of energy, such as chemical energy or mechanical energy, and stores it, then converts it back to electrical energy when needed. The switch 3 can be selectively connected to at least one of an external power source or the electrical energy storage module 2, and can directly consume electrical energy from the external power system or consume electrical energy stored in the electrical energy storage module 2 through reverse conversion. This selection can be unidirectional or bidirectional, meaning that at the same time, the building's power-consuming facilities can use electrical energy from the external power system as temporary regulation and supplementation, or they can use the electrical energy stored in the electrical energy storage module 2. The building's power-consuming facilities include the outdoor unit 4 and power-consuming units 7 within the building, such as those used for fresh air systems, lighting facilities, refrigerators, or water heaters.

[0014] The outdoor unit 4 is installed on the exterior wall 63 of the building and includes a control module 41. The control module 41 is further connected to the compressor 42 and the fan 43. When the compressor 42 is running, the refrigerant can circulate within the system consisting of the outdoor heat exchanger 43, the air energy storage module 5, and the valve assembly. The air energy storage module 5 can store the air energy obtained by the outdoor unit 4 and can further release the stored air energy into the building. The air energy storage module 5 can be installed either inside the building space or within the building structure, such as within the decorative layer or concrete layer consisting of the ceiling 61, floor 62, and walls 63, forming an integrated structure. The installation form of the air energy storage module within the building can be one or a combination of these forms. The physical energy storage medium can be a phase change energy storage medium, or it can be the building's decorative layer or concrete. The air energy storage module 5 can store thermal energy or cold energy, or it can integrate thermal and cold energy storage. On one hand, the air energy storage module 5 stores air energy; on the other hand, the air energy storage module 5 exchanges heat with the air inside the building to regulate the temperature of the air inside the building.

[0015] like Figure 1As shown, the upstream of the switch 3 is connected to the power supply module 1 and the energy storage module 2, respectively. The switch 3 can select between using electricity from the external power system or the electricity output from the energy storage module 2 according to the building's energy consumption facilities. The downstream of the switch 3 is connected to the outdoor unit 4 and the power consumption unit 7 inside the building. An air source heat pump storage module 5 is also installed inside the building, and the outdoor unit 4 is connected to the air source heat pump storage module 5. The outdoor unit 4 obtains electricity for cyclic operation and obtains air energy from outside the building for physical storage or release in the air source heat pump storage module 5 to meet the building's cooling and heating needs. The air source heat pump storage module 5 is equipped with an energy storage heat exchanger, which is embedded in the energy storage medium, thereby enabling conductive heat exchange of solids or colloids and improving the heat exchange capacity of the energy storage heat exchanger. In addition to reducing energy consumption and thus reducing the energy requirements of the energy storage module 2, it can effectively reduce the energy consumption power of the outdoor unit, further reducing the power requirements of the energy storage module 2. Therefore, even when the air source energy storage module 5 uses the electrical energy output by the energy storage module 2, the energy storage power and energy requirements of the energy storage module 2 are not significant.

[0016] The energy system of this application includes both an electric energy storage module and an air source energy storage module. The air source energy storage module 5 stores the building's cooling and heating energy consumption, which accounts for a large proportion of electricity consumption. This reduces the energy storage power and energy requirements of the electric energy storage module 2, which only needs to meet the energy consumption needs of the power-consuming unit 7, thus achieving a systematic energy storage system for the entire building. In special circumstances, if the power-consuming unit 7 experiences high energy consumption in a short period, it can be temporarily switched to an external power source via a switcher 3.

[0017] During off-peak hours, outdoor unit 4 and power-consuming unit 7 utilize direct electrical energy from the external power system via switch 3. Outdoor unit 4 not only meets the building's cooling and heating needs using off-peak electricity but also stores the air energy it receives within the air source energy storage module 5 through physical energy storage. Although the electrical energy storage module 2 is disconnected from outdoor unit 4 and power-consuming unit 7, it can directly perform chemical or mechanical energy storage on the external power system, ready to output the stored chemical or mechanical energy as electrical energy during peak hours.

[0018] During peak electricity hours, both outdoor unit 4 and power-consuming unit 7 utilize the electrical energy output from energy storage module 2 via switch 3. Since air source heat pump energy storage module 5 releases the energy stored during off-peak hours, enabling the building to still meet cooling and heating needs, outdoor unit 4 can remain inactive during peak hours. This reduces the demand on the power and energy stored in energy storage module 2, ensuring that the power and energy stored in module 2 only need to meet the requirements of power-consuming unit 7.

[0019] The power and energy of the energy storage module 2 are designed with a certain degree of redundancy to address the issue of insufficient energy storage in the air source energy storage module 5 due to excessive short-term energy consumption within the building. In such cases, the stored energy in the energy storage module 2 can be used to power the outdoor unit 3 to meet the building's cooling and heating needs. Furthermore, it can also meet the power and energy requirements of the energy storage module 2 when the building's power-consuming unit 7 occasionally consumes too much energy. The switch 3 further enables the outdoor unit 4 and power-consuming unit 7 to utilize direct power from the external power system to meet the building's energy consumption needs when the redundancy of the energy storage module 2 is insufficient for occasional physical energy storage or when the stored energy is used to power the entire building system.

[0020] like Figure 2 As shown, the outdoor unit 4 can also be switched via control valve 8 to output the refrigerant obtained from air energy to the second heat exchanger 9 inside the building. The second heat exchanger 9 can exchange energy with the air inside the building through a fan. This method requires a higher energy storage capacity and greater energy output than the air energy storage module 5 described above. During cooling, the second heat exchanger 9 can be used for forced convection cooling; during heating, the air energy storage module 5 can be used for heating. In this cooling mode, the building needs good insulation or the energy system consisting of the second heat exchanger 9 and the outdoor unit 4 needs a high energy efficiency ratio, which can effectively reduce the energy storage capacity requirement of the electric energy storage module 2.

[0021] Furthermore, such as Figure 3 As shown, an intelligent control module 31 can be installed on the switch 3, which is connected to multiple power-consuming units 7. The intelligent control module 31 senses the operating status of the power-consuming units 7 through sensors, and controls the operation of multiple power-consuming units 7 to ensure that each power-consuming unit 7 makes full use of off-peak electricity periods and reduces electricity consumption during peak periods. The intelligent control module 31 can also regulate the staggered use of energy-consuming facilities in the building during peak periods, reducing the power demand on the energy storage module 2 for synchronous power consumption of energy-consuming facilities in the building during peak periods, and guiding the orderly use of electrical appliances in the building by issuing warnings and other information.

[0022] Taking a household water heater as an example, if the water heater starts operating immediately during off-peak hours (e.g., 12 AM to 7 AM), the water temperature might not reach the set temperature until 2 AM, leaving 5 hours until the off-peak period ends. During this time, the hot water releases heat through the heater's insulation layer, causing the water temperature to drop and the heater to restart during peak hours. Therefore, the intelligent control module 31 within the switcher 3 sets the off-peak operation time to just before the end of the off-peak period, ensuring the water temperature reaches the set temperature before operation. For example, setting it to start at 5 AM ensures heating stops precisely at 7 AM when the off-peak period ends, minimizing heat release. Similarly, through an IoT system, the freezer temperature in a refrigerator can be adjusted from -18℃ to -22℃ before the off-peak period ends, allowing sufficient cold storage to replenish the cooling required during peak hours and reducing operating time. The same principle applies to energy storage modules.

[0023] Although the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A building energy system integrating electrical energy storage and air energy storage, characterized in that, It includes a power supply module, an energy storage module, a switch, an outdoor unit, and an air source energy storage module. The upstream of the switch is connected to the power supply module and the energy storage module, respectively. The downstream of the switch is connected to the outdoor unit and the power-consuming unit inside the building, respectively. An air source energy storage module is also provided inside the building. The outdoor unit and the air source energy storage module are connected.

2. The building energy system according to claim 1, characterized in that, The air source energy storage module is equipped with an energy storage heat exchanger, which is placed in the energy storage medium.

3. The building energy system according to claim 1 or 2, characterized in that, The air-source energy storage module is installed in at least one of the interior spaces of the building or in the building structure.

4. The building energy system according to claim 2, characterized in that, The energy storage medium is at least one of the decorative layer or concrete.

5. The building energy system according to claim 1, 2, or 4, characterized in that, The outdoor unit includes a control module, an outdoor heat exchanger, a compressor, and a fan. The control module is connected to the compressor and the fan. The compressor is connected to the outdoor heat exchanger and the air energy storage module to form a refrigerant circulation pipeline.

6. The building energy system according to claim 1, 2, or 4, characterized in that, A control valve is also provided between the outdoor unit and the air source energy storage module, and the outdoor unit is connected to a second heat exchanger through the control valve.

7. The building energy system according to claim 6, characterized in that, The second heat exchanger is the indoor unit of the air conditioner.

8. The building energy system according to claim 1, 2, 4, or 7, characterized in that, The switch is equipped with an intelligent control module.

9. The building energy system according to claim 8, characterized in that, The intelligent control module is connected to the power-consuming units inside the building via sensors.

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