Low-carbon floor air supply system

Abstract

The invention discloses a low-carbon floor air supply system which comprises an air handling unit, an air supply output port of the air handling unit is communicated with an air supply cavity, and the low-carbon floor air supply system further comprises a floor air outlet and an air return outlet. The power output end of each wind driven generator is connected to a variable frequency driver of the air handling unit to form a wind energy-electric energy-mechanical energy conversion chain, a movable partition plate is arranged in the air supply cavity and divides the cavity into a plurality of independently-controlled air supply areas, and each air supply area corresponds to a set of floor air outlets. Each area is connected with an independent electric air volume adjusting valve, a transparent photovoltaic film is integrated in the building glass curtain wall, electric energy output by the transparent photovoltaic film is preferentially supplied to a fan motor of an air handling unit, multiple stages of heat exchangers are arranged at an air return outlet, and one stage of heat exchanger is coupled with a fresh air inlet to achieve cold energy recovery. The second-stage heat exchanger is connected with a building hot water system to achieve waste heat utilization, and the problem of contradiction between intermittent energy and continuous load requirements is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building low-carbon technologies, and particularly relates to a low-carbon floor air supply system. Background Art

[0002] The traditional floor air supply system is a common air conditioning air supply method. Its core principle is to deliver the processed air to the indoor through the plenum chamber under the floor, and utilize the thermal buoyancy effect to make the cold air flow from bottom to top, thereby improving thermal comfort and reducing energy consumption. However, the traditional system mainly relies on grid power to drive the fan, which accounts for a significant proportion in building energy consumption, and it is difficult to achieve low-carbon operation. There is a lack of efficient integration means with renewable energy, resulting in a relatively high carbon footprint of the system. The plenum chamber is usually a single cavity structure and cannot dynamically adjust the air supply area according to the indoor personnel distribution or heat load changes, easily causing local overcooling or overheating. Summary of the Invention

[0003] To achieve the above object, the technical solution of the present invention is as follows: A low-carbon floor air supply system includes an air handling unit. The air supply outlet of the air handling unit is connected to a plenum chamber. It also includes floor air outlets and a return air outlet. A number of vertical axis wind turbines are installed at intervals on the building facade. The power output terminals of each wind turbine are connected to the variable frequency driver of the air handling unit, forming a conversion chain of wind energy - electrical energy - mechanical energy. A movable partition is provided in the plenum chamber to divide the chamber into multiple independently controlled air supply areas. Each air supply area corresponds to a group of floor air outlets, and each area is connected to an independent electric air volume regulating valve. Transparent photovoltaic films are integrated in the building glass curtain wall, and the electric energy output is preferentially supplied to the fan motor of the air handling unit. A multi-stage heat exchanger is provided at the return air outlet. Among them, the first-stage heat exchanger is coupled with the fresh air inlet to realize cold energy recovery, and the second-stage heat exchanger is connected to the building hot water system to realize waste heat utilization.

[0004] Preferably, the blades of the vertical axis wind turbine adopt a hollow design, and the blade surfaces are covered with a photovoltaic coating, forming a wind-solar hybrid power generation unit. Its output terminal is connected to the power distribution system of the air handling unit through a smart microgrid controller.

[0005] Based on the above technical features, the hollow blade design of the vertical axis wind turbine reduces the starting wind speed threshold, and the photovoltaic coating enhances the absorption of scattered light through the surface plasmon resonance effect. The two work together to improve the power generation continuity under low wind speed conditions. The smart microgrid controller adopts the maximum power point tracking algorithm to dynamically distribute the wind-solar electric energy to different loads of the air handling unit, realizing the smooth utilization of fluctuating renewable energy.

[0006] Preferably, the movable partition of the dynamic partition static pressure box is of a folding structure. The partition surface is provided with an array of diversion holes, and the opening area of the diversion holes is adjusted by a shape memory alloy spring, which automatically changes the opening degree in response to the temperature change inside the static pressure box.

[0007] Based on the above technical features, the shape memory alloy spring of the folding partition is based on the martensitic phase transformation principle. When the local temperature inside the static pressure box exceeds the set threshold, it deforms, driving the array of diversion holes to produce a non-linear change in the opening degree. This topologically optimized structure can suppress the cold air stratification phenomenon through local turbulent perturbation while maintaining the air supply uniformity.

[0008] Preferably, a rotating deflector is arranged inside the air outlet of the floor. The deflection angle of the deflector is driven by a micro stepping motor, and the control signal of the stepping motor comes from the real-time personnel density monitoring data of the area where it is located.

[0009] Based on the above technical features, the rotating deflector is designed with an asymmetric surface optimized by computational fluid dynamics, and the precise control of the jet trajectory is achieved by changing the incident angle. The personnel density monitoring uses a millimeter wave radar array, combined with a convolutional neural network to identify the distribution pattern of active heat sources, forming a closed-loop control of air volume - flow direction.

[0010] Preferably, the heat exchanger is of a parallel flow plate type structure, and the surface of the heat exchange plates is coated with a nano material coating with alternating hydrophilic - hydrophobic properties, forming a directional condensate film to enhance the heat transfer efficiency.

[0011] Based on the above technical features, the hydrophilic - hydrophobic alternating coating guides the condensate to quickly detach from the hydrophobic area and form an ultra-thin liquid film in the hydrophilic area through the surface energy gradient effect, breaking the heat transfer boundary layer limitation of traditional heat exchangers. The vortex generators in the parallel flow channels further strengthen the perturbation intensity of the gas - liquid two-phase flow.

[0012] Preferably, it further includes a carbon footprint tracking module, which collects data on wind power generation, photovoltaic power generation, air supply energy consumption, and heat recovery efficiency in real time, and calculates the carbon emission intensity per unit air supply volume through an embedded processor.

[0013] Based on the above technical features, the embedded processor adopts the life cycle assessment methodology, associating the equipment operation data with the material implicit carbon emission database. The blockchain certificate contains a timestamp, an energy consumption fingerprint, and a hash check value, providing an immutable full-process traceability record for green building certification.

[0014] Preferably, the outer wall of the air supply duct of the air handling unit is coated with a phase change material thermal insulation layer. The phase change material is selected so that its phase change temperature is between the air supply temperature and the ambient temperature, which is used to suppress the cold loss caused by the temperature fluctuation of the pipe wall.

[0015] Based on the above technical features, the microencapsulated phase change material absorbs the environmental heat outside the pipe wall through solid-liquid phase change, and the latent heat buffering effect is generated during the lattice structure reorganization process. When the supply air temperature fluctuates, the thermal history memory characteristic of the material can achieve non-linear temperature response and reduce the energy consumption demand for active frequency modulation.

[0016] Preferably, a low-carbon floor air supply method through the system includes: Step 1: Based on the load prediction of the building energy management system, adjust the air supply parameters in advance; Step 2: When the instantaneous power of wind power generation exceeds the set threshold, automatically increase the air supply volume for cold storage; Step 3: Dynamically optimize the priority of the air supply area according to the indoor personnel movement trajectory prediction model; Step 4: Package the carbon footprint data into a blockchain-verifiable certificate.

[0017] Based on the above technical features, the load prediction uses a long short-term memory network to process the coupling relationship between historical operation data and meteorological parameters; the personnel trajectory prediction constructs a Markov transition matrix through UWB positioning beacons; the smart contract of the blockchain certificate automatically verifies the matching degree between the carbon emission reduction amount and the actual air supply parameters to form tradable carbon assets.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the multi-physical field coupling design, the present invention deeply integrates renewable energy capture, dynamic air distribution, and thermodynamic optimization, and realizes the energy autonomy and carbon transparency of the building ventilation system while ensuring thermal comfort. The non-linear interaction between the components of the system generates a synergistic effect that exceeds the traditional solution. In particular, the time decoupling characteristics of wind-solar complementary power supply and phase change energy storage effectively solve the contradiction between intermittent energy sources and continuous load demands. Description of the Drawings

[0019] Figure 1 is the structural schematic diagram of the low-carbon floor air supply system described in the present invention Figure 1 ; Figure 2 is the structural schematic diagram of the low-carbon floor air supply system described in the present invention Figure 2 . Detailed Embodiments

[0020] The following further clarifies the present invention in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0021] Embodiment: As Figure 1 - Figure 2As shown in the figure, a low-carbon floor air supply system includes an air handling unit. The air supply outlet of the air handling unit is connected to the air supply chamber 110. It also includes floor air outlets 120 and a return air outlet. A number of vertical axis wind turbines 100 are installed at intervals on the building facade. The power output terminals of each wind turbine are connected to the variable frequency drive of the air handling unit, forming a conversion chain of wind energy - electrical energy - mechanical energy. A movable partition 200 is provided in the air supply chamber, dividing the chamber into multiple independently controlled air supply areas. Each air supply area corresponds to a group of floor air outlets, and each area is connected to an independent electric air volume regulating valve. Transparent photovoltaic thin films are integrated in the building glass curtain wall, and the electric energy output is preferentially supplied to the fan motor of the air handling unit. A multi-stage heat exchanger 130 is provided at the return air outlet. Among them, the first-stage heat exchanger is coupled with the fresh air inlet to realize cold energy recovery, and the second-stage heat exchanger is connected to the building hot water system to realize waste heat utilization.

[0022] Furthermore, the blades of the vertical axis wind turbine adopt a hollow design, and the blade surface is covered with a photovoltaic coating, forming a wind-solar hybrid power generation unit. Its output terminal is connected to the power distribution system of the air handling unit through an intelligent microgrid controller. The hollow blade design of the vertical axis wind turbine reduces the starting wind speed threshold, and the photovoltaic coating enhances the absorption of scattered light through the surface plasmon resonance effect. The two work together to improve the power generation continuity under low wind speed conditions. The intelligent microgrid controller adopts the maximum power point tracking algorithm to dynamically distribute wind-solar electric energy to different loads of the air handling unit, realizing the smooth utilization of fluctuating renewable energy.

[0023] Furthermore, the movable partition of the dynamic partition static pressure box is a folding structure. The partition surface is provided with an array of diversion holes, and the opening area of the diversion holes is adjusted by a shape memory alloy spring, automatically changing the opening degree in response to the temperature change inside the static pressure box. The shape memory alloy spring of the folding partition is based on the martensitic phase transformation principle. When the local temperature inside the static pressure box exceeds the set threshold, it deforms, driving the array of diversion holes to produce a non-linear opening change. This topologically optimized structure can suppress the cold air stratification phenomenon through local turbulent perturbation while maintaining the air supply uniformity.

[0024] Furthermore, rotating guide vanes 210 are provided inside the air outlet of the floor air outlet. The deflection angle of the guide vanes is driven by a micro stepping motor, and the control signal of the stepping motor comes from the real-time personnel density monitoring data of the area where it is located. The rotating guide vane is designed with an asymmetric surface optimized based on computational fluid dynamics, and the precise control of the jet trajectory is achieved by changing the incident angle. The personnel density monitoring uses a millimeter wave radar array, combined with a convolutional neural network to identify the distribution pattern of active heat sources, forming a closed-loop control of air volume - flow direction.

[0025] Furthermore, the heat exchanger is of a parallel flow plate structure, and the surface of the heat exchange plates is coated with a hydrophilic-hydrophobic alternating nanomaterial coating to form a directional condensate film to enhance the heat transfer efficiency. The hydrophilic-hydrophobic alternating coating guides the condensate to quickly detach from the hydrophobic area and form an ultra-thin liquid film in the hydrophilic area through the surface energy gradient effect, breaking the heat transfer boundary layer limitation of traditional heat exchangers. The vortex generators in the parallel flow channels further enhance the disturbance intensity of the gas-liquid two-phase flow.

[0026] Furthermore, it also includes a carbon footprint tracking module, which collects data on wind power generation, photovoltaic power generation, air supply energy consumption, and heat recovery efficiency in real time, and calculates the carbon emission intensity per unit air supply volume through an embedded processor. The embedded processor adopts the life cycle assessment methodology and correlates the equipment operation data with the implicit carbon emission database of materials. The blockchain certificate contains a timestamp, an energy consumption fingerprint, and a hash check value, providing an immutable full-process traceability record for green building certification.

[0027] Furthermore, the outer wall of the air supply duct of the air handling unit is coated with a phase change material insulation layer. The phase change material is selected so that its phase change temperature is between the air supply temperature and the ambient temperature, which is used to suppress the cold loss caused by the temperature fluctuation of the pipe wall. The microencapsulated phase change material absorbs the ambient heat outside the pipe wall through solid-liquid phase change, and its lattice structure reorganization process generates a latent heat buffering effect. When the air supply temperature fluctuates, the thermal history memory characteristic of the material can achieve a non-linear temperature response, reducing the energy consumption demand for active frequency modulation.

[0028] Furthermore, as another embodiment of the present invention, a low-carbon floor air supply method through the above system, the method includes: Step 1, based on the load prediction of the building energy management system, adjust the air supply parameters in advance; Step 2, when the instantaneous power of wind power generation exceeds the set threshold, automatically increase the air supply volume for cold storage; Step 3, dynamically optimize the priority of the air supply area according to the indoor personnel movement trajectory prediction model; Step 4, package the carbon footprint data into a blockchain-verifiable certificate.

[0029] The load prediction uses a long short-term memory network to process the coupling relationship between historical operation data and meteorological parameters; the personnel trajectory prediction constructs a Markov transition matrix through UWB positioning beacons; the smart contract of the blockchain certificate automatically verifies the matching degree between the carbon emission reduction amount and the actual air supply parameters, forming tradable carbon assets.

[0030] It should be noted that the above content only illustrates the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements all fall within the protection scope of the claims of the present invention.

Claims

1. A low-carbon floor air supply system, comprising an air handling unit, the air supply outlet of the air handling unit is communicated with an air supply chamber, and further comprising a floor air outlet and a return air outlet, characterized in that, Install a number of vertical-axis wind turbines at intervals on the outer facade of the building. The power output terminals of each wind turbine are connected to the variable-frequency drive of the air handling unit, forming a conversion chain of wind energy - electrical energy - mechanical energy. There is a movable partition in the air supply chamber, which divides the chamber into multiple independently controlled air supply areas. Each air supply area corresponds to a group of floor air outlets, and each area is connected to an independent electric air volume regulating valve. The building glass curtain wall integrates transparent photovoltaic thin films, and the electrical energy output is preferentially supplied to the fan motor of the air handling unit. A multi-stage heat exchanger is installed at the return air outlet. Among them, the first-stage heat exchanger is coupled with the fresh air inlet to achieve cold recovery, and the second-stage heat exchanger is connected to the building hot water system to achieve waste heat utilization.

2. The low-carbon floor air supply system according to claim 1, characterized in that The blades of the vertical-axis wind turbine adopt a hollow design, and the blade surface is covered with a photovoltaic coating, forming a wind-solar hybrid power generation unit. Its output terminal is connected to the power distribution system of the air handling unit through an intelligent microgrid controller.

3. The low-carbon floor air supply system according to claim 1, characterized in that, The movable partition of the dynamic partition static pressure box is of a folding structure. The partition surface is provided with an array of diversion holes, and the opening area of the diversion holes is adjusted by a shape memory alloy spring, and the opening degree is automatically changed in response to the temperature change inside the static pressure box.

4. A low-carbon underfloor air supply system according to claim 1, characterized in that, Rotating guide vanes are arranged inside the air outlet of the floor air outlet. The deflection angle of the guide vanes is driven by a micro stepping motor, and the control signal of the stepping motor comes from the real-time personnel density monitoring data of the area where it is located.

5. A low-carbon floor air supply system according to claim 1, characterized in that, The heat exchanger is of a parallel flow plate structure, and the surface of the heat exchange plate is coated with a nano material coating with alternating hydrophilic and hydrophobic properties, forming a directional condensate film to enhance the heat transfer efficiency.

6. The low-carbon floor air supply system according to claim 1, characterized in that It also includes a carbon footprint tracking module, which collects data on wind power generation, photovoltaic power generation, air supply energy consumption and heat recovery efficiency in real time, and calculates the carbon emission intensity per unit air supply volume through an embedded processor.

7. A low-carbon floor air supply system according to claim 1, characterized in that, The outer wall of the air supply duct of the air handling unit is coated with a phase change material insulation layer. The phase change material is selected so that its phase change temperature is between the air supply temperature and the ambient temperature, and is used to suppress the cold loss caused by the temperature fluctuation of the pipe wall.

8. A low-carbon floor air supply method using the system according to any one of claims 1 to 7, characterized in that, The method includes: Step 1, based on the load prediction of the building energy management system, adjust the air supply parameters in advance; Step 2, when the instantaneous power of wind power generation exceeds the set threshold, automatically increase the air supply volume for cold storage; Step 3, dynamically optimize the priority of the air supply area according to the indoor personnel movement trajectory prediction model; Step 4, package the carbon footprint data into a blockchain-verifiable certificate.

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