Energy-saving prefabricated building system

Abstract

The present invention discloses an energy-saving prefabricated building system, including a basement, an above-ground building, a geothermal energy collector and a geothermal energy distribution system. The geothermal energy collector is buried in the foundation of the basement and extends longitudinally into the deep soil. The present invention utilizes the geothermal energy collector to exchange energy between the air in the basement and the deep soil, and utilizes the geothermal energy distribution system to concentrate the air after energy exchange and distribute it to the fresh air system of the above-ground building. In this way, in summer, soil energy can be effectively used as a cold source to cool the fresh air, and in winter, soil energy can be effectively used as a heat source to preheat the fresh air, thereby effectively reducing the energy consumption of using air conditioners. The geothermal energy collector has a simple structural design and can be easily extended into the deep soil during construction. It can not only facilitate the realization of a larger pre-buried depth, but also does not require the excavation of a foundation pit for pre-buried, is not affected by geological conditions, and is simple and convenient to construct. At the same time, it can effectively play a role in anti-floating of the foundation when used as a steel pile.

Description

Technical Field

[0001] The present invention belongs to the technical field of building energy-saving design, and in particular relates to an energy-saving assembled building system. Background Art

[0002] Building energy consumption in my country accounts for over 25% of total societal energy consumption, with half of this coming from heating, ventilation, air conditioning, and related systems. Therefore, air conditioning energy consumption has become a hot topic in the field of building energy conservation. Almost all buildings today use air conditioning systems for air conditioning, ventilation, and cooling, and their high energy consumption has become a major contributor to building energy consumption. Furthermore, while air conditioning systems create a pleasant indoor environment, they also cause some damage to the external environment. Therefore, utilizing renewable energy to lower indoor temperatures has become a hot topic in the air conditioning sector.

[0003] Based on underground temperature changes, the earth's crust is often divided into the following four geothermal zones: (1) Diurnal temperature variation zone: The temperature in this zone is affected by daily air temperature, and its variation depth generally does not exceed 1m; (2) Annual temperature variation zone: The temperature in this zone is affected by seasonal air temperature changes, and its depth generally does not exceed 20m; (3) Constant temperature zone: At a depth below 20m, it is not affected by seasonal air temperature changes; (4) Geothermal warming zone: Below the constant temperature zone, due to the influence of the earth's internal heat, the ground temperature increases with increasing burial depth. From the distribution of geothermal zones, in summer, the soil around the buried pipes pre-buried to a certain depth can be used as a cold source to cool the fresh air, and in winter, the soil around the buried pipes pre-buried to a certain depth can be used as a heat source to preheat the fresh air, which can reduce the energy consumption of air conditioning.

[0004] Existing geothermal energy utilization methods do not yet have a mature solution suitable for high-rise buildings. For example, patent document CN1415910A discloses a buried pipe heating and air-conditioning system and its application. The system consists of a heat pump unit, a hot water preparation heat exchanger, a direct cooling heat exchanger, a hot water reservoir, a floor heating coil, an indoor heat exchanger, and a buried pipe heat exchanger. These components are connected by connecting pipes. The underground portion of the buried pipe heat exchanger adopts an underground U-shaped pipe structure, and the above-ground portion is connected to the heat pump unit and the direct cooling heat exchanger through pipes, forming independent closed circulation pipes. The pipes are filled with a circulating working medium, and the circulation pipes are equipped with a circulating pump and a pipe switch. In this solution, not only is the structural design complex and the construction cost high, but also because the underground part of the buried pipe heat exchanger adopts an underground U-shaped pipe structure, the circulating working medium in the pipe is used to exchange heat with the soil. This objectively determines that the pre-buried depth of the U-shaped pipe is limited, and the actual utilization of soil is limited. On the other hand, after long-term use, there is a safety hazard of leakage of the circulating medium in the pipe. Once the circulating medium leaks, it is difficult to repair and maintain.

[0005] Patent document CN107449075 discloses an underground buried pipe fresh air system. By burying pipes in the underground soil in a serpentine shape, air enters the underground pipes from an outdoor air inlet and exchanges heat with the soil through the pipe wall, thereby reducing energy consumption, reducing operating costs, simplifying the system structure, minimizing maintenance costs, and reducing investment. However, in this solution, the serpentine buried pipes are affected by their structural design. The pre-buried depth of the underground pipes is limited (up to 5 meters underground). The depth of the soil pit limits the pre-buried depth of the buried pipes, and the heat exchange efficiency between the air and the soil in the buried pipes is low, resulting in limited soil energy utilization. In addition, after the deep excavation of the soil pit during construction, the serpentine buried pipe method requires the addition of a large number of pipe piles and the thickening of the raft foundation to ensure the strength of the foundation. This will not only greatly increase the construction difficulty and construction cost, but also has poor practicality and is greatly affected by geological conditions, making it impossible to promote and apply. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an energy-saving prefabricated building system with an ingenious structural design, which is convenient for efficiently absorbing and utilizing deep soil energy and can effectively play a role in anti-floating foundation.

[0007] In order to solve the above technical problems, the technical solution of the present invention is:

[0008] Energy-saving prefabricated building systems, including basement and above-ground buildings, also include:

[0009] There are two or more ground energy collectors, each of which is buried in the foundation of the basement and extends longitudinally into the deep soil. The ground energy collector is provided with an air inlet and an air outlet. Air in the basement enters the ground energy collector through the air inlet, exchanges energy with the deep soil, and is then discharged through the air outlet.

[0010] The ground energy distribution system is used to collect the air after energy exchange and distribute it to the fresh air system of the above-ground buildings.

[0011] As a preferred technical solution, the geothermal energy collector includes an outer sleeve with a closed lower end and an open upper end, an inner core tube is arranged inside the outer sleeve, the tube body of the inner core tube extends to the bottom of the outer sleeve, an air inlet chamber is formed between the inner wall of the tube body of the outer sleeve and the outer wall of the tube body of the inner core tube, the tube cavity of the inner core tube forms an air outlet chamber, the tops of the air inlet chamber and the air outlet chamber are isolated, and the bottoms of the air inlet chamber and the air outlet chamber are connected; the opening at the upper end of the outer sleeve forms an air inlet connected to the air inlet chamber, and the air inlet is connected to the space inside the basement; the inner core tube is provided with an air outlet connected to the air outlet chamber.

[0012] As a preferred technical solution, a breathable cover is provided at the air inlet.

[0013] As a preferred technical solution, heat-conducting fins are provided on the outer peripheral side of the outer sleeve.

[0014] As a preferred technical solution, the heat-conducting fins are designed in a sheet or spiral shape.

[0015] As a preferred technical solution, the ground energy collectors are distributed in an array in the underground area between the basement foundation structure columns.

[0016] As a preferred technical solution, the geothermal energy distribution system includes a geothermal energy air supply branch pipe arranged corresponding to the geothermal energy collector, one end of the geothermal energy air supply branch pipe is connected to the geothermal energy collector, and the other end of the geothermal energy air supply branch pipe is connected to the geothermal energy distributor through the geothermal energy air supply main pipe. The geothermal energy distributor is connected to a fresh air delivery pipe, and the fresh air delivery pipe is connected to the fresh air system of the above-ground building.

[0017] As a preferred technical solution, the geothermal energy distribution system also includes a condensate extraction branch pipe arranged corresponding to the geothermal energy collector, one end of the condensate extraction branch pipe extends into the bottom of the geothermal energy collector, and the other end of the condensate extraction branch pipe is connected to the geothermal energy distributor through a condensate extraction main pipe.

[0018] As a preferred technical solution, the geothermal energy distributor includes a gas-liquid separator, an exhaust fan is installed in the upper part of the gas-liquid separator, and a water pump is installed in the lower part of the gas-liquid separator.

[0019] As an optimal technical solution, the walls of the basement and the above-ground buildings are all prefabricated walls; a limiting groove is formed on the foundation of the basement, and a positioning block adapted to the limiting groove is formed on the bottom of the prefabricated wall of the basement.

[0020] Due to the adoption of the above technical solution, the present invention has at least the following beneficial effects:

[0021] (1) Use geothermal energy collectors to exchange energy between the air in the basement and the deep soil, and use geothermal energy distribution systems to collect and distribute the air after energy exchange to the fresh air system of the above-ground building. In this way, soil energy can be effectively used as a cold source to cool the fresh air in summer, and as a heat source to preheat the fresh air in winter, thereby effectively reducing the energy consumption of air conditioning and benefiting building energy conservation.

[0022] (2) The geothermal energy collector has an ingenious structural design and can be prefabricated. During construction, the metal outer casing can be easily inserted into the deep soil, which not only facilitates the realization of a larger pre-buried depth, but also eliminates the need to dig a foundation pit for pre-buried construction. It is not affected by geological conditions and is simple and convenient to construct.

[0023] (3) Since the geothermal energy collector is provided with an air inlet chamber and an air outlet chamber, and the tops of the air inlet chamber and the air outlet chamber are isolated and connected at the bottoms, the air enters the outer tube from the air inlet under the action of the fan, and flows downward from top to bottom along the air inlet chamber between the inner wall of the outer tube and the outer wall of the inner core tube, and then flows to the bottom of the outer tube, and then enters the air outlet chamber formed by the tube cavity of the inner core tube, and then flows upward from bottom to top along the air outlet chamber of the inner core tube. The entire circulation flow path of the air flow is long, and the air flow can flow to the deep soil and exchange heat with the soil through the tube wall, so the heat exchange effect is good and the efficiency is high.

[0024] (4) The main structure of the geothermal energy collector consists of only an outer tube and an inner core tube. The structural design is simple and the production cost is low. After the array is arranged during construction, the outer tube is also used as a steel pile in the high and low pile foundations or raft foundations to generate end-bearing steel piles or friction steel piles, which can effectively play a role in the foundation's anti-floating effect. The spiral heat-conducting fin outer tube design can better improve the anti-floating ability of the pile raft foundation. At the same time, the condensed water generated by the heat exchange between the tube wall and the soil in the deep soil can be recycled for flushing toilets, watering flowers and vegetables, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0026] Figure 1 2 is a schematic structural diagram of an energy-saving prefabricated building system according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the layout of the ground energy distribution system in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the main structure of the geothermal energy collector according to an embodiment of the present invention;

[0029] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0030] Figure 5 1 is a schematic diagram of a top view of a geothermal energy collector according to an embodiment of the present invention;

[0031] Figure 6 2 is a schematic structural diagram of the lower portion of the inner core tube in an embodiment of the present invention;

[0032] Figure 7 Schematic diagram of airflow in a geothermal energy collector according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of a structure in which spiral heat-conducting fins are provided on the outer circumference of an outer sleeve;

[0034] Figure 9 This is a schematic diagram of a structure in which a sheet-like heat-conducting fin is provided on the outer peripheral side of an outer sleeve;

[0035] Figure 10 yes Figure 9 Schematic diagram of the cross-sectional structure at the middle BB;

[0036] Figure 11 is a schematic diagram of the layout of the ground energy distribution system in an embodiment of the present invention;

[0037] Figure 12 Schematic diagram of the structure of the ground energy distributor in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. It is understood that those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims.

[0039] like Figures 1 to 12 As shown, the energy-saving prefabricated building system includes a basement 10, an above-ground building 20, a ground energy collector 30 and a ground energy distribution system 40, wherein:

[0040] The walls of the basement 10 and the above-ground building 20 are preferably prefabricated walls. Of course, the structural forms of the basement 10 and the above-ground building 20 can be of any style, which does not constitute a limitation on the scope of protection of the present invention; Figure 2 In this embodiment, a limiting groove 11 is formed on the foundation of the basement 10, and a positioning block 12 adapted to the limiting groove 11 is formed at the bottom of the prefabricated wall of the basement 10. By cooperating with the limiting groove 11 on the foundation and the positioning block 12 on the wall, the basement wall can be prevented from being affected by deformation or displacement due to external soil pressure, thereby ensuring construction accuracy and quality.

[0041] refer to Figure 1 and Figure 11Several geothermal energy collectors 30 are installed, buried within the basement 10 foundation and extending longitudinally into the deep soil. The buried depth can reach 8 to 25 meters, and they are arranged in an array in the underground area between the basement's foundation columns 13. In this way, the geothermal energy collectors 30 also serve as load-bearing piles, helping to prevent the foundation from buoyancy. The top of the geothermal energy collector 30 extends through the raft foundation 14 into the building's basement. The air inlet of the geothermal energy collector 30 is connected to the interior of the building's basement 10. Air from the basement enters the geothermal energy collector 30 through the air inlet, exchanges energy with the deep soil, and is then discharged through the air outlet.

[0042] Specifically, refer to Figures 3 to 5 The geothermal energy collector 30 includes an outer sleeve 31 with a closed lower end and an open upper end. An inner core tube 32 is provided in the outer sleeve 31. The inner core tube 32 is fixed to the outer sleeve 31 by a fixing member 39. The tube body of the inner core tube 32 extends to the bottom of the outer sleeve 31. An air inlet chamber 33 is formed between the inner wall of the outer sleeve 31 and the outer wall of the inner core tube 32. The tube cavity of the inner core tube 32 forms an air outlet chamber 34. The tops of the air inlet chamber 33 and the air outlet chamber 34 are isolated. 33 is connected to the bottom of the air outlet chamber 34; the opening at the upper end of the outer sleeve 31 forms an air inlet 35 connected to the air inlet chamber 33, and the air inlet 35 is provided with a breathable cover 36, which is preferably made of self-luminous material, so that it can play a lighting and indication role in the basement; the inner core tube 32 is provided with an air outlet 37 connected to the air outlet chamber 34. Under the action of the fan, the outer sleeve 11 and the inner core tube 12 naturally form a flow path from top to bottom and then from bottom to top.

[0043] The ground energy distribution system 40 is used to collect and distribute the air after energy exchange to the fresh air system of the above-ground building 20. Figure 11 and Figure 12 The geothermal energy distribution system 40 includes a geothermal energy air supply branch pipe 41 corresponding to the geothermal energy collector 30. One end of the geothermal energy air supply branch pipe 41 is connected to the air outlet 37 of the geothermal energy collector 30. The other end of the geothermal energy air supply branch pipe 41 is connected to a geothermal energy distributor 45 via a geothermal energy air supply main pipe 42. The geothermal energy distributor 45 is connected to a fresh air supply pipe 43, which is connected to the fresh air system of the above-ground buildings. The geothermal energy distribution system also includes a condensate extraction branch pipe 44 corresponding to the geothermal energy collector 30. One end of the condensate extraction branch pipe 44 extends into the bottom of the geothermal energy collector, and the other end of the condensate extraction branch pipe 44 is connected to the geothermal energy distributor 45 via a condensate extraction main pipe 46.

[0044] refer to Figure 12The geothermal energy distributor 45 includes a gas-liquid separator 451, with an exhaust fan 452 installed in the upper portion of the separator 451. The exhaust fan 452 is connected to the geothermal energy air supply main 42. A water pump 453 is installed in the lower portion of the separator 451. The water pump 453 is connected to the condensate extraction main 46. The water outlet of the water pump 453 is connected to a drain pipe 47. The water pump 453 regularly drains the condensate generated by the heat exchange between the air and the soil. This condensate can be recycled for flushing toilets, watering plants, and other uses. Under the action of the exhaust fan 452, the air in the basement exchanges heat with the deep soil energy through the geothermal energy collector 30. In summer, the deep soil energy is used as a cold source to cool the fresh air, and in winter, it is used as a heat source to preheat the fresh air, effectively reducing energy consumption. At the same time, since the geothermal energy collectors 30 are distributed in an array in the foundation to form a multi-point end-bearing steel pile or friction steel pile structure, they can effectively play a role in preventing the foundation from floating, thereby reducing construction costs.

[0045] Specifically, refer to Figure 3 and Figure 7 The clean air in the basement enters the outer tube 31 from the air inlet 35 through the breathable cover 36, and flows downward from top to bottom along the air inlet chamber 33 between the inner wall of the outer tube 31 and the outer wall of the inner core tube 32. After flowing to the bottom of the outer tube 31, it enters the air outlet chamber 34 formed by the tube cavity of the inner core tube 32, and then flows upward from bottom to top along the air outlet chamber 34 of the inner core tube 32. The entire circulation flow path of the air flow is long, and the air flow can flow to the deep soil and exchange heat with the soil through the tube wall, so the heat exchange effect is good and the efficiency is high.

[0046] refer to Figure 6 In order to ensure the safe and reliable bottom connectivity between the air inlet chamber 33 and the air outlet chamber 34 , a plurality of air inlet holes 321 are opened on the lower tube wall of the inner core tube 32 .

[0047] refer to Figures 8 to 10 The outer circumference of the outer sleeve 31 is preferably provided with a plurality of heat-conducting fins 38. The heat-conducting fins 38 can increase the contact area with the soil, thereby transferring geo-energy, and can also increase the overall strength of the collector, allowing it to be used as a friction pile or end-end pile, while also improving the foundation's anti-floating properties. The heat-conducting fins 38 can be in the form of sheets or spirals.

[0048] refer to Figure 3 To facilitate the sinking of the geothermal energy collector 30, the lower end of the outer sleeve 31 is preferably tapered. The length of the outer sleeve 31 is preferably 8 to 25 meters. The geothermal energy collector 30 features a clever structural design and can be prefabricated. During construction, the metal outer sleeve can be easily inserted deep into the soil, facilitating the embedment of the collector to a greater depth. This eliminates the need for pre-embedding in a foundation pit, making it unaffected by geological conditions and simplifying construction.

[0049] The present invention utilizes a geothermal energy collector 30 to exchange energy between the air in the basement 10 and the deep soil, and utilizes a geothermal energy distribution system 40 to collect and distribute the air after the energy exchange to the fresh air system of the above-ground building 20. In this way, the soil energy can be effectively utilized as a cold source to cool the fresh air in the summer, and as a heat source to preheat the fresh air in the winter, thereby effectively reducing the energy consumption of air conditioning and contributing to building energy conservation.

[0050] The geothermal energy collector 30 primarily consists of an outer casing and an inner core tube, resulting in a simple design and low manufacturing cost. After being arranged in an array during construction, the outer casing doubles as steel piles within high and low cap pile foundations or raft foundations, creating end-bearing steel piles or friction steel piles, effectively resisting buoyancy. The spiral heat-conducting fin design of the outer casing further enhances the pile-raft foundation's buoyancy resistance. Condensate generated deep within the soil through heat exchange between the tube wall and the soil can be recycled for flushing toilets, watering plants, and other uses, facilitating energy-saving building applications.

[0051] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An energy-saving prefabricated building system, comprising a basement and an above-ground building, characterized in that: Also includes: There are two or more ground energy collectors, which are buried in the foundation of the basement and extend longitudinally into the deep soil; the ground energy collector includes an outer sleeve with a closed lower end and an open upper end, an inner core tube is arranged inside the outer sleeve, and the tube body of the inner core tube extends to the bottom of the outer sleeve, an air inlet chamber is formed between the inner wall of the tube body of the outer sleeve and the outer wall of the tube body of the inner core tube, and the tube cavity of the inner core tube forms an air outlet chamber, the tops of the air inlet chamber and the air outlet chamber are isolated, and the bottoms of the air inlet chamber and the air outlet chamber are connected; the opening at the upper end of the outer sleeve forms an air inlet connected to the air inlet chamber, and the air inlet is connected to the space inside the basement; the inner core tube is provided with an air outlet connected to the air outlet chamber, and the air in the basement enters the ground energy collector from the air inlet, exchanges energy with the deep soil, and is then discharged from the air outlet; A geothermal energy distribution system is used to collect the air after energy exchange and distribute it to the fresh air system of the above-ground building; the geothermal energy distribution system includes a geothermal energy air supply branch pipe arranged corresponding to the geothermal energy collector, one end of the geothermal energy air supply branch pipe is connected to the geothermal energy collector, and the other end of the geothermal energy air supply branch pipe is connected to the geothermal energy distributor through the geothermal energy air supply main pipe, and the geothermal energy distributor is connected to a fresh air supply pipe, and the fresh air supply pipe is connected to the fresh air system of the above-ground building; the geothermal energy distribution system also includes a condensate extraction branch pipe arranged corresponding to the geothermal energy collector, one end of the condensate extraction branch pipe extends to the bottom of the geothermal energy collector, and the other end of the condensate extraction branch pipe is connected to the geothermal energy distributor through the condensate extraction main pipe; the geothermal energy distributor includes a gas-liquid separator, an exhaust fan is installed in the upper part of the gas-liquid separator, and a water pump is installed in the lower part of the gas-liquid separator.

2. The energy-saving prefabricated building system according to claim 1, characterized in that: A breathable cover plate is provided at the air inlet.

3. The energy-saving prefabricated building system according to claim 1, characterized in that: The outer peripheral side of the outer sleeve is provided with heat conducting fins.

4. The energy-saving prefabricated building system according to claim 3, characterized in that: The heat conducting fins are designed in a sheet or spiral shape.

5. The energy-saving prefabricated building system according to claim 1, characterized in that: The ground energy collectors are distributed in an array in the underground area between the basement foundation structure columns.

6. The energy-saving prefabricated building system according to any one of claims 1 to 5, characterized in that: The walls of the basement and above-ground buildings are all prefabricated walls; A limiting groove is formed on the foundation of the basement, and a positioning block adapted to the limiting groove is formed on the bottom of the assembled prefabricated wall of the basement.

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