Solar energy and ground air duct coupling temperature regulation control system and design and construction method thereof

Abstract

The invention discloses a solar energy and ground air duct coupling temperature adjustment control system and a design and construction method thereof. The solar energy and ground air duct coupling temperature adjustment control system comprises a solar heat collection-hot pressing chimney module, a buried metal air duct module and an intelligent control module. The solar heat collection-hot pressing chimney module is arranged along a roof flanging beam to be subjected to temperature adjustment or a south outer wall stand column, the buried metal air duct module is coupled with the solar heat collection-hot pressing chimney module, and the intelligent control module is connected with an electric air valve and a frequency conversion fan in the buried metal air duct module. The invention provides a solar energy and ground air duct coupling temperature regulation control system with passive priority, active supplement and annual availability, and a design-prefabrication-installation-calibration full-process industrial construction method is formed in a matched manner, so that rapid copying and large-scale popularization of ultra-low energy consumption buildings are realized.

Description

Technical Field

[0001] This invention relates to the field of passive temperature control technology for ultra-low energy buildings, and particularly to a solar energy and ground ventilation duct coupled temperature control system and its design and construction method. Background Technology

[0002] With the development of green buildings, passive temperature control technology has become a research hotspot. While existing solar chimney technology can utilize solar energy to generate thermal pressure to drive ventilation, it suffers from high supply air temperatures and limited cooling effects. Although standalone underground ventilation technology can utilize the coldness of the soil to cool the air, it typically requires mechanical drive and suffers from low heat exchange efficiency and large footprint.

[0003] Furthermore, the coupling methods between solar chimneys and underground ventilation systems in existing technologies are relatively simple, mostly involving direct series connection. This lacks accurate calculation of the thermal process of the coupled system and intelligent control of the system's operating mode. It cannot automatically adjust the operating status according to factors such as outdoor weather conditions and indoor load, resulting in low system efficiency. In addition, the integration with the main building structure is not high, and there are structural safety issues such as waterproofing, settlement prevention, and corrosion prevention, making it difficult to achieve large-scale promotion and application.

[0004] Existing technologies such as CN202410554339.X (a ventilation system and energy system based on air volume regulation and coupled with solar energy), CN202411627877.3 (a system and method for coupling underground ventilation with photovoltaic and solar thermal energy), CN202320359856.2 (a heating and cooling system suitable for near-zero energy buildings), and CN202211130116.8 (an intelligent new energy rural house temperature control system integrating underground ventilation and solar energy) have the following problems: First, most of them still use PE, PVC or concrete low thermal conductivity underground pipes, which require 40-60 meters in length to achieve a considerable temperature drop, resulting in a large footprint and rapid soil heat decay; Second, existing systems generally adopt timed valves or single-parameter control of "sunlight-DC fan", which is still active priority; Third, existing patents do not involve the construction and construction coordination with roof waterproofing and foundation settlement; Fourth, existing technologies mostly focus on single-season cooling or rural house scenarios. Summary of the Invention

[0005] The purpose of this invention is to provide a solar energy and ground ventilation duct coupled temperature control system and its design and construction method to address the above-mentioned shortcomings. This invention solves the problems of high air temperature from existing solar chimneys, large footprint and mechanical drive requirements of ground ventilation systems, lack of quantitative design for coupling schemes, single control strategies, and low integration with the main building structure. This invention proposes a solar energy and ground ventilation duct coupled temperature control system that prioritizes passive operation, supplements active operation, and is available year-round. It also forms a complete industrialized construction method that integrates design, prefabrication, installation, and calibration, enabling rapid replication and large-scale promotion of ultra-low energy consumption buildings.

[0006] This invention is achieved through the following scheme: A solar-powered and underground ventilation duct coupled temperature control system includes a solar collector-heat-pressurized chimney module, an underground metal ventilation duct module, and an intelligent control module. The solar collector-heat-pressurized chimney module is installed along the edge beam of the roof to be regulated or the column of the south exterior wall. The underground metal ventilation duct module is coupled with the solar collector-heat-pressurized chimney module. The intelligent control module is connected to the electric air valve and variable frequency fan in the underground metal ventilation duct module.

[0007] The solar collector-heat-pressed chimney module uses factory-prefabricated lightweight concrete / color steel composite panels, integrating selective heat absorption panels, transparent covers, insulated enclosure frames, and adjustable exhaust vents.

[0008] The buried metal duct module uses galvanized steel pipe or aluminum alloy pipe covered with graphene heat-conducting layer to form a prefabricated integrated pipe, which is continuously laid. The metal duct adopts clamp-ring pressure connection with a strength of 0.6MPa, a burial depth of 1.5-3m, a pipe spacing of ≥0.5m, a slope of ≥1% towards the ground air inlet, and a condensate drainage well at the lowest point. The intelligent control module is equipped with sensors that collect data on three parameters: temperature difference, wind pressure, and irradiation. The collected data is transmitted to the local programmable controller (PLC), which outputs control commands to the electric air valve and the variable frequency fan. The local PLC has a built-in five-mode switching algorithm.

[0009] The adaptive operation logic in the five-mode switching algorithm is as follows: ① Purely passive: High radiation during the day and chimney thermal pressure ≥0.6 Pa, zero-energy ventilation; ② Variable frequency enhancement: The fan continuously supplements the air volume when the heat pressure is insufficient, with an air volume of 150-600 m³ / h. 3 ·h -1 ; ③ Nighttime cooling: When the outside temperature is <22 ℃ and the room temperature has a heat load, the bypass outdoor cold air is further cooled through the ground ventilation duct; ④ Winter preheating: When the outside temperature is <5℃, close the ground ventilation duct, preheat the fresh air through the chimney, and increase the supply air temperature by 3-5℃; ⑤ Standby antifreeze: In extreme low temperatures, the air valve is closed to prevent cold air from penetrating and condensate from freezing.

[0010] All modes are automatically determined by the controller, with priority order ①③②④⑤.

[0011] This solution also provides a design method for a solar energy and underground ventilation duct coupled temperature control system. The quantitative design of the solar collector-thermal-pressure chimney module and the underground metal ventilation duct module is calculated using the following method. The overall design adopts a complete set of quantitative design formulas that couple the continuity equation, energy equation, and heat transfer equation, which are used to determine the pipe length, pipe diameter, number of parallel pipes, and air volume in one molding process. The continuity equation is: m ˙ =ρ air V A duct n Where: m ˙ —Design air mass flow rate, unit: kg / s -1 Determined by the building's sensible heat load; ρ air —The average density of air is taken as 1.2 kg. m -3 V — Economic section wind speed, 1.5–2.5 m s -1 A duct =πD 2 / 4 — Cross-sectional area of ​​a single pipe, in m² 2 n — the number of parallel roots.

[0012] The energy equation is: m ˙ cp (T in T out )=Q load In the formula: c p =1005 J kg -1 K -1 Specific heat of air; T in —Air temperature at the inlet of the buried pipe, in °C, taken as the outdoor design daily average; T out —Target supply air temperature, in °C, is 2–3 K lower than the indoor design temperature; Q load —The sensible heat load of the building, in W, is calculated according to the standard and taken as 30–50% of the load on the underground ventilation system.

[0013] The heat transfer equation is: Q load =U A surf ΔT lm η s Where: the total heat exchange area is A surf =πD L n; Logarithmic mean temperature difference

[0014] The overall heat transfer coefficient U is

[0015] Where: h in =10 15 W m -2 K -1 —Convective heat transfer coefficient inside the tube; δ wall , λ metal —Pipe wall thickness and thermal conductivity; λ backfill The thermal conductivity of the graphite layer; z — burial depth, in meters; D o —Outer diameter of the pipe, in meters; the last item is the thermal resistance of the soil for linear heat source.

[0016] The design formula set also includes the soil thermal disturbance coefficient: The value ranges from 0.75 to 0.90.

[0017] In the formula, S is the center distance of the pipe, in meters, and is taken as 0.5–0.8m.

[0018] It also includes the following simultaneous solution steps: Step 1: Determine the required m from the energy equation. ˙ ; Step 2: Substitute into the continuity equation, economic wind speed V = 2 m / s -1 Initially, D = 0.1m, thus n is obtained; Step 3: Substitute n and D into the heat transfer equation to find L; Step 4: Verify ΔT lm 、U、η s Iterate until |ΔL| < 0.1m; Step 5: Output the final D, n, L and total voltage drop.

[0019] This solution also discloses an industrialized construction method for a solar energy and ground-based wind duct coupled temperature control system, the specific steps of which are as follows: Step 1, BIM Collaboration: Complete the chimney flange beam, embedded sleeve, and pipeline integration in one go and generate module QR codes; Step 2, Factory Prefabrication: The chimney module is integrally formed, and the metal pipe is covered with a graphene thermal conductive layer to form a prefabricated integrated pipe; Step 3, quick installation: The solar collector-hot-pressed chimney module is hoisted into place, the trench is continuously laid with pipes, and the crimp joints do not require welding; Step 4, fine sand backfilling: First, lay a 100 mm thick medium-coarse sand leveling layer at the bottom of the trench, then backfill with clean fine sand with a particle size ≤2 mm layer by layer. The loose thickness of each layer is ≤200 mm. Use a small vibrating plate tamper to vibrate back and forth 3 times to achieve a compaction degree ≥0.93. After the top surface of the fine sand is flush with the original ground level, spray a small amount of clean water on the surface and cover it with geotextile. Cure for 48 hours to ensure that the backfill layer is dense, uniform and free from settlement. Step 5, one-click calibration via mobile APP: input the measured soil temperature and air volume, and the system will automatically correct the valve opening and the fan frequency conversion reference value to achieve commissioning-free delivery.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This solution can improve metal thermal conductivity by 3-5 times, shorten buried pipe length by 50%, and reduce footprint by 40%; five-mode control ensures zero-energy operation for more than 70% of the year, saving 85% of electricity compared to traditional mechanical ventilation; the flanged beam and waterproof sleeve structure have undergone 100,000 thermal cycle tests without leakage and meet ±20 mm settlement requirements; the prefabrication rate is more than 80%, reducing on-site wet work by 60%, and the investment payback period is less than 5 years. It is suitable for various public and residential buildings in hot summer and cold winter, hot summer and warm winter, and cold and frigid regions, providing a replicable and scalable temperature control solution for ultra-low energy consumption buildings.

[0021] 2. This invention uses a metal pipe coated with a graphene thermal conductive layer, which increases the heat exchange per unit length by 3-5 times and shortens the buried pipe length by more than half. It also provides a quantitative formula for "improved logarithmic mean temperature difference + soil thermal interference coefficient", so that the pipe length and pipe diameter correspond to the building load at one time, avoiding trial and error based on experience.

[0022] 3. This invention establishes a three-parameter adaptive model of "temperature difference-wind pressure-irradiation" to achieve stepless switching between five modes: pure passive, enhanced, nighttime cooling, winter preheating, and standby, with zero energy consumption for more than 70% of the daytime.

[0023] 4. This invention is constructed using modular components and dedicated nodes to meet ±20 mm settlement requirements, enabling rapid industrial-scale delivery; 5. The application scenarios of this invention cover hot summer and cold winter, hot summer and warm winter, severe cold and cold regions, and realize summer cooling, transitional season ventilation, winter preheating and year-round use. It is suitable for various building types such as offices, schools, and near-zero energy consumption residences. Attached Figure Description

[0024] Figure 1This is a flowchart of the quantitative design calculation method in this invention; Figure 2 This is a flowchart of the industrialized construction method of the present invention. Detailed Implementation

[0025] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0026] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0029] Example 1 like Figures 1-2 As shown, the present invention provides a technical solution: A solar-powered and underground ventilation duct coupled temperature control system includes a solar collector-heat-pressurized chimney module, an underground metal ventilation duct module, and an intelligent control module. The solar collector-heat-pressurized chimney module is installed along the edge beam of the roof to be regulated or the column of the south exterior wall. The underground metal ventilation duct module is coupled with the solar collector-heat-pressurized chimney module. The intelligent control module is connected to the electric air valve and variable frequency fan in the underground metal ventilation duct module.

[0030] Based on the above structure, this solution will couple the solar thermal collector-thermal pressure drive on the roof or south exterior wall with the heat exchange of the buried metal duct outside the building boundary line for temperature regulation in summer cooling, transitional season ventilation and winter preheating air supply; control will be achieved through an intelligent control module.

[0031] As an example, the solar collector-heat-pressed chimney module uses factory-prefabricated lightweight concrete / color steel composite panels, integrating selective heat absorption panels, transparent covers, insulated enclosure frames and adjustable exhaust vents, which can be quickly anchored to roof flanges or south exterior wall columns.

[0032] The buried metal duct module uses galvanized steel pipe or aluminum alloy pipe covered with a graphene heat-conducting layer to form a prefabricated integrated pipe. It is continuously laid. The metal duct adopts a clamp-ring pressure connection with a strength of 0.6 MPa, a burial depth of 1.5-3 m, a pipe spacing of ≥0.5 m, a slope of ≥1% towards the ground air inlet, and a condensate drainage well at the lowest point.

[0033] The intelligent control module is equipped with sensors that collect data on three parameters: temperature difference, wind pressure, and irradiation. The collected data is transmitted to a local programmable logic controller (PLC). The PLC outputs control commands to the electric air valve and the variable frequency fan. The local programmable logic controller (PLC) has a built-in five-mode switching algorithm, prioritizing zero energy consumption.

[0034] It also includes building interface modules, flanged beam embedded parts, stainless steel corrugated waterproof sleeves, landscape air inlets (filter-insect-rodent prevention three-in-one), and ground air diffusers. The above building interface modules are integrated with building waterproofing, foundation settlement and outdoor landscaping.

[0035] The adaptive operation logic in the five-mode switching algorithm is as follows: ① Purely passive: High radiation during the day and chimney thermal pressure ≥0.6 Pa, zero-energy ventilation; ② Variable frequency enhancement: The fan continuously supplements the air volume when the heat pressure is insufficient, with an air volume of 150-600 m³ / h. 3 ·h -1 ; ③ Nighttime cooling: When the outside temperature is <22 ℃ and the room temperature has a heat load, the bypass outdoor cold air is further cooled through the ground ventilation duct; ④ Winter preheating: When the outside temperature is <5℃, close the ground ventilation duct, preheat the fresh air through the chimney, and increase the supply air temperature by 3-5℃; ⑤ Standby antifreeze: In extreme low temperatures, the air valve is closed to prevent cold air from penetrating and condensate from freezing.

[0036] All modes are automatically determined by the controller, with priority order ①③②④⑤.

[0037] The quantitative design of the aforementioned solar collector-heat-pressed chimney module and buried metal duct module is calculated using the following method; The overall design adopts a complete set of quantitative design formulas that couple the continuity equation, energy equation, and heat transfer equation. It can be directly used to determine the pipe length, pipe diameter, number of parallel pipes, and air volume in one molding process, avoiding trial and error based on experience.

[0038] The continuity equation (mass conservation) is: m ˙ =ρ air V A duct n Where: m ˙ — Design air mass flow rate (kg / s) -1 ), determined by the building's sensible heat load; ρ air — Average air density, taken as 1.2 kg m -3 V — Economic section wind speed, 1.5–2.5 m s -1 (Continuity equation constraints); A duct =πD 2 / 4—— Cross-sectional area of ​​a single pipe (m²) 2 n — the number of parallel roots (an integer, to be determined); The energy equation (load-flow matching) is as follows: m ˙ cp (T in T out )=Q load In the formula: c p =1005 J kg -1 K -1 Specific heat of air; T in — The air temperature at the inlet of the buried pipe (°C) is taken as the outdoor design daily average; T out — Target supply air temperature (°C) is 2–3 K lower than the indoor design temperature; Q load — The sensible heat load (W) of the building is calculated according to the specifications and then taken as 30–50% of the load on the underground ventilation system.

[0039] The heat transfer equation (determining the pipe length) is as follows: Q load =U A surf ΔT lm η s Where: the total heat exchange area is A surf =πD L n; Logarithmic mean temperature difference

[0040] The overall heat transfer coefficient U is

[0041] In the formula h in =10 15 W m -2 K -1 — Convective heat transfer coefficient inside the pipe (wind speed 2 m) s -1 (time); δ wall , λ metal — Pipe wall thickness and thermal conductivity (galvanized steel λ≈50 W / m) -1 K -1 ); λ backfill D represents the thermal conductivity of the graphite layer; z represents the burial depth (m); D represents the thermal conductivity of the graphite layer. o — Pipe outer diameter (m); the last item is the thermal resistance of the soil for linear heat source (Kelman correction).

[0042] The design formula set also includes the soil thermal disturbance coefficient: The value typically ranges from 0.75 to 0.90.

[0043] In the formula, S is the center distance of the pipe (m), which is usually taken as 0.5–0.8 m.

[0044] It also includes the following simultaneous solution steps: (coupling of the three equations: continuity, energy, and heat transfer) Step 1: Determine the required m from the energy equation. ˙ ; Step 2: Substitute into the continuity equation, economic wind speed V = 2 m / s -1 Initially, D = 0.1m, and n is obtained (rounded up). Step 3: Substitute n and D into the heat transfer equation to find L; Step 4: Verify ΔT lm 、U、η s Iterate until |ΔL| < 0.1m; Step 5: Output the final D, n, L and total voltage drop.

[0045] This embodiment also discloses an industrialized construction method for a solar energy and ground ventilation duct coupled temperature control system. The specific steps are as follows: Step 1, BIM Collaboration: Complete the chimney flange beam, embedded sleeve, and pipeline integration in one go and generate module QR codes; Step 2, Factory Prefabrication: The chimney module is integrally formed, and the metal pipe is covered with a graphene thermal conductive layer to form a prefabricated integrated pipe; Step 3, quick installation: The solar collector-hot-pressed chimney module is hoisted into place, the trench is continuously laid with pipes, and the crimp joints do not require welding; Step 4, fine sand backfilling: First, lay a 100 mm thick leveling layer of medium-coarse sand at the bottom of the trench, then backfill with clean fine sand with a particle size ≤2 mm layer by layer. The loose thickness of each layer should be ≤200 mm. Use a small vibratory plate compactor to vibrate back and forth 3 times to achieve a compaction degree ≥0.93. After the top surface of the fine sand is flush with the original ground level, spray a small amount of clean water on the surface and cover it with geotextile. Cure for 48 hours to ensure that the backfill layer is dense, uniform, and free from settlement. Step 5, one-click calibration via mobile APP: input the measured soil temperature and air volume, and the system will automatically correct the valve opening and the fan frequency conversion reference value to achieve commissioning-free delivery.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solar energy and ground ventilation duct coupled temperature control system, characterized in that, It includes a solar collector-heat-pressed chimney module, an underground metal duct module, and an intelligent control module; the solar collector-heat-pressed chimney module is installed along the edge beam of the roof to be regulated or the column of the south exterior wall, the underground metal duct module is coupled to the solar collector-heat-pressed chimney module, and the intelligent control module is connected to the electric air valve and variable frequency fan in the underground metal duct module.

2. The solar energy and ground ventilation duct coupled temperature control system as described in claim 1, characterized in that: The solar collector-heat-pressed chimney module uses factory-prefabricated lightweight concrete / color steel composite panels, integrating selective heat absorption panels, transparent covers, insulated enclosure frames, and adjustable exhaust vents.

3. The solar energy and ground ventilation duct coupled temperature control system as described in claim 2, characterized in that: The buried metal duct module uses galvanized steel pipe or aluminum alloy pipe covered with graphene heat-conducting layer to form a prefabricated integrated pipe, which is continuously laid. The metal duct adopts clamp-ring pressure connection with a strength of 0.6MPa, a burial depth of 1.5-3m, a pipe spacing of ≥0.5m, a slope of ≥1% towards the ground air inlet, and a condensate drainage well at the lowest point. The intelligent control module is equipped with sensors that collect data on three parameters: temperature difference, wind pressure, and irradiation. The collected data is transmitted to the local programmable controller (PLC), which outputs control commands to the electric air valve and the variable frequency fan. The local PLC has a built-in five-mode switching algorithm.

4. The solar energy and ground ventilation duct coupled temperature control system as described in claim 3, characterized in that: The adaptive operation logic in the five-mode switching algorithm is as follows: ① Purely passive: High radiation during the day and chimney thermal pressure ≥0.6 Pa, zero-energy ventilation; ② Variable frequency enhancement: The fan continuously supplements the air volume when the heat pressure is insufficient, with an air volume of 150-600 m³ / h. 3 ·h -1 ; ③ Nighttime cooling: When the outside temperature is <22 ℃ and the room temperature has a heat load, the bypass outdoor cold air is further cooled through the ground ventilation duct; ④ Winter preheating: When the outside temperature is <5℃, close the ground ventilation duct, preheat the fresh air through the chimney, and increase the supply air temperature by 3-5℃; ⑤ Standby antifreeze: In extreme low temperatures, the air valve is closed to prevent cold air infiltration and condensation from freezing; All modes are automatically determined by the controller, with priority order ①③②④⑤.

5. A design method for a solar energy and ground ventilation duct coupled temperature control system, applied to the control system described in any one of claims 1 to 4, characterized in that: The quantitative design of solar collector-hot-pressed chimney modules and buried metal duct modules is calculated using the following method; The overall design adopts a complete set of quantitative design formulas that couple the continuity equation, energy equation, and heat transfer equation, which are used to determine the pipe length, pipe diameter, number of parallel pipes, and air volume in one molding process. The continuity equation is: m ˙ =p air V A duct n Where: m ˙ —Design air mass flow rate, unit: kg / s -1 Determined by the building's sensible heat load; ρ air —The average density of air is taken as 1.2 kg. m -3 V — Economic section wind speed, 1.5–2.5 m s -1 A duct =πD 2 / 4 — Cross-sectional area of ​​a single pipe, in m² 2 n — the number of parallel roots.

6. The design method as described in claim 5, characterized in that: The energy equation is: m ˙ CP (T in T out )=Q load In the formula: c p =1005 J kg -1 K -1 Specific heat of air; T in —Air temperature at the inlet of the underground pipe, in °C, taken as the outdoor design daily average; T out —Target supply air temperature, in °C, is 2–3 K lower than the indoor design temperature; Q load —The sensible heat load of the building, in W, is calculated according to the standard and taken as 30–50% of the load on the underground ventilation system.

7. The design method as described in claim 6, characterized in that: The heat transfer equation is: Q load =U A surf ΔT lm or s Where: the total heat exchange area is A surf =πD L n; Logarithmic mean temperature difference The overall heat transfer coefficient U is Where: h in =10 15 W m -2 K -1 —Convective heat transfer coefficient inside the tube; δ wall , λ metal —Pipe wall thickness and thermal conductivity; λ backfill The thermal conductivity of the graphite layer; z — burial depth, in meters; D o —Outer diameter of the pipe, in meters; the last item is the thermal resistance of the soil for linear heat source.

8. The design method as described in claim 7, characterized in that: The design formula set also includes the soil thermal disturbance coefficient: The value ranges from 0.75 to 0.

90. In the formula, S is the center distance of the pipe, in meters, and is taken as 0.5–0.8m.

9. The design method as described in claim 8, characterized in that: It also includes the following simultaneous solution steps: Step 1: Determine the required m from the energy equation. ˙ ; Step 2: Substitute into the continuity equation, economic wind speed V = 2 m / s -1 Initially, D = 0.1m, thus n is obtained; Step 3: Substitute n and D into the heat transfer equation to find L; Step 4: Verify ΔT lm 、U、η s Iterate until |ΔL| < 0.1m; Step 5: Output the final D, n, L and total voltage drop.

10. An industrialized construction method for a solar energy and ground ventilation duct coupled temperature control system, characterized in that: The specific steps are as follows: Step 1, BIM Collaboration: Complete the chimney flange beam, embedded sleeve, and pipeline integration in one go and generate module QR codes; Step 2, Factory Prefabrication: The chimney module is integrally formed, and the metal pipe is covered with a graphene thermal conductive layer to form a prefabricated integrated pipe; Step 3, quick installation: The solar collector-hot-pressed chimney module is hoisted into place, the trench is continuously laid with pipes, and the crimp joints do not require welding; Step 4, fine sand backfilling: First, lay a 100 mm thick medium-coarse sand leveling layer at the bottom of the trench, then backfill with clean fine sand with a particle size ≤2 mm layer by layer. The loose thickness of each layer is ≤200 mm. Use a small vibrating plate tamper to vibrate back and forth 3 times to achieve a compaction degree ≥0.

93. After the top surface of the fine sand is flush with the original ground level, spray a small amount of clean water on the surface and cover it with geotextile. Cure for 48 hours to ensure that the backfill layer is dense, uniform and free from settlement. Step 5, one-click calibration via mobile APP: input the measured soil temperature and air volume, and the system will automatically correct the valve opening and the fan frequency conversion reference value to achieve commissioning-free delivery.

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