CN116335207A - PHC tubular pile soil thermal environment adjusting device of ground photovoltaic - Google Patents
PHC tubular pile soil thermal environment adjusting device of ground photovoltaic Download PDFInfo
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- CN116335207A CN116335207A CN202310312850.4A CN202310312850A CN116335207A CN 116335207 A CN116335207 A CN 116335207A CN 202310312850 A CN202310312850 A CN 202310312850A CN 116335207 A CN116335207 A CN 116335207A
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- soil
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- 239000002689 soil Substances 0.000 title claims abstract description 54
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 239000012782 phase change material Substances 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010792 warming Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 32
- 238000009413 insulation Methods 0.000 description 14
- 230000008014 freezing Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/14—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against frost heaves in soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/20—Supporting structures directly fixed to an immovable object
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Power Engineering (AREA)
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- Sustainable Energy (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of frozen soil building construction, and particularly relates to a PHC tubular pile soil thermal environment adjusting device of ground photovoltaic, which comprises a cable, a controller, a photovoltaic bracket, a converter and a photovoltaic plate, wherein the photovoltaic plate is arranged on the photovoltaic bracket, and the photovoltaic plate, the converter and the controller are electrically connected; the solar energy water heater also comprises a heating system, a water-resisting layer and a heat-insulating layer; the heating system comprises a steel structure shell, an automatic control switch, a temperature sensor, a metal heating rod, a phase change material and an electric wire; the metal heating rod is arranged in the steel structure shell, the shell is filled with phase change materials, the temperature sensor is arranged in the steel structure shell, and the temperature sensor and the automatic control switch are electrically connected with the controller; the heat preservation sets up around PHC tubular pile, and the water-resisting layer sets up around the heat preservation, and heating system sets up between heat preservation and frozen soil layer. The redundant energy generated during daytime working of the solar panel is converted into electric energy by the electric energy converter and transmitted to the heating system, so that the purpose of heating and warming soil is achieved.
Description
Technical Field
The invention belongs to the technical field of frozen soil constructional engineering, and particularly relates to a PHC tubular pile soil thermal environment adjusting device based on ground photovoltaics.
Background
In recent years, the advantages of photo-thermal resources are fully utilized in northeast and other high-latitude low-altitude areas of China, the project construction of the photovoltaic power station is actively promoted, scientific basis is provided for the establishment of industrial policies and technical standards in the related engineering construction field, and wisdom is contributed to the technical progress and innovation development of China and even the global new energy industry. In a ground photovoltaic power station system, PHC pipe piles are generally adopted as photovoltaic module supports. However, most high latitude low altitude areas are cold and long in winter, the soil freezing depth reaches more than 2 m, the groundwater level is high and the seasonal variation is large. A large amount of ice lens body separation phenomenon is easier to form in the soil freezing process under water source supply, so that the PHC pipe pile rises and inclines due to the freezing and pulling, and the photovoltaic power generation efficiency is affected.
Because the damage of the frozen pulling of the tubular pile is serious, a targeted frozen pulling prevention measure is needed, and common measures comprise: changing the structure of the pile body, for example, changing a cylindrical pile end into a conical pile end, and increasing the pull-up resistance of the pile body; an additional structure is added, an anchoring device is arranged at the outer side of the pile body, and the pulling resistance of the pile body is increased; and (3) replacing the soil structure around the pile body, and replacing the frozen soil with weak frozen swelling soil. The measures all achieve a certain effect, but have the design defects of high cost, high construction difficulty, difficult wide application and the like.
Disclosure of Invention
In order to solve the technical problems, the invention provides a soil thermal environment adjusting device for a PHC pipe pile of a ground photovoltaic, which utilizes redundant energy generated during daytime working of a solar panel, converts the redundant energy into electric energy through an electric energy converter and transmits the electric energy to a heating system, so as to achieve the aim of heating and warming soil. The heating system is internally filled with the phase-change material, the phase-change material is melted and stored in the daytime, the heating rod with lower ambient temperature starts to work at night to enable the phase-change material to emit heat, so that the soil thermal environment adjustment for a long time in winter can be realized, the soil temperature of a frozen soil layer is improved, the phenomenon that the PHC pipe pile rises and inclines due to freezing and pulling is relieved, and the using effect of the PHC pipe pile is affected.
The invention adopts the technical scheme that: the PHC tubular pile soil thermal environment adjusting device comprises a cable, a controller, a photovoltaic bracket, a converter and a photovoltaic plate, wherein the photovoltaic plate is arranged on the photovoltaic bracket, the photovoltaic bracket is fixed on the tubular pile frame, and the photovoltaic plate, the converter and the controller are electrically connected; the adjusting device also comprises a heating system, a water-resisting layer and a heat-insulating layer; the heating system comprises a steel structure shell, an automatic control switch, a temperature sensor, a metal heating rod, a phase change material and an electric wire; the metal heating rod is arranged in the steel structure shell, the cavity around the metal heating rod is filled with phase change materials, the automatic control switch is respectively connected with the metal heating rod and the electric wire, the temperature sensor is arranged in the steel structure shell, and the temperature sensor and the automatic control switch are electrically connected with the controller; the heat preservation sets up around PHC tubular pile, the water-resisting layer sets up around the heat preservation, heating system sets up between heat preservation and frozen soil layer.
Further, the phase change material is paraffin with a melting point of 2-5 ℃.
Further, the waterproof layer is made of rubber plastic waterproof materials, the thickness of the waterproof layer is 20 mm, the waterproof layer surrounds the PHC pipe piles, and the paving area of the waterproof layer is the same as that of the heat insulation layer.
Further, the heat insulation layer is a polyurethane heat insulation board, the thickness of the heat insulation layer is 40 mm, the heat insulation layer is laid around the waterproof layer of the PHC pipe pile in a covering way, and the laying area of the heat insulation layer is adjusted according to the heat load of the PHC pipe pile.
Further, the steel structure shell is made of corrosion-resistant steel with the thickness of 20 mm.
Further, the length of the metal heating rod is about 60 a cm a.
The invention has the beneficial effects that: the device utilizes redundant energy of solar panels during daytime working, converts the redundant energy into electric energy through an electric energy converter and transmits the electric energy to a heating system, so that the aim of heating and warming soil is fulfilled. The PHC pipe pile does not need other power elements, meets the frost-resistant pulling-out requirement of the PHC pipe pile in the severe cold region in winter, and can be popularized and popularized in the severe cold region in winter. The main advantages are as follows:
(1) The residual energy of the solar panel is converted into electric energy in daytime, the electric energy is transmitted to the metal heating rod through the controller to release heat to heat soil, so that the soil temperature of the frozen soil layer is improved, and the PHC pipe pile is prevented from rising and tilting due to frozen pulling;
(2) And the heating system is internally filled with the phase-change material, when the temperature is higher in daytime, the phase-change material absorbs heat to melt and store energy, and when the ambient temperature is lower at night, the heating rod starts to work to enable the phase-change material to release heat, and the frozen soil layer soil is continuously heated. The unstable phenomenon in the solar energy utilization process can be improved, and the heat efficiency of the vacuum tube heat collector can be improved;
(3) Paving waterproof materials on the ground surface to prevent rain and snow from directly entering the soil, so that the water content of the soil is reduced, and the soil is prevented from freezing; paving a thermal insulation material under the ground surface to prevent the heat loss of soil and ensure the retention of the heat of the soil;
(4) The device has the advantages of simple structure, full utilization of solar energy resources, no need of other power elements, capability of autonomously realizing heat collection and utilization, convenient construction, difficult occurrence of faults, good stability and capability of running in unattended field areas.
Drawings
FIG. 1 is a schematic structural view of a first embodiment;
FIG. 2 is a schematic diagram of a heating system according to the first embodiment;
fig. 3 is a schematic diagram of the operation of the heating system in the first embodiment.
Description of the embodiments
Examples
Referring to the figures, the PHC pipe pile soil thermal environment adjusting device comprises a cable 6, a controller 7, a photovoltaic bracket 8, a converter 9 and a photovoltaic plate 10, wherein the photovoltaic plate is arranged on the photovoltaic bracket, the photovoltaic bracket is fixed on a pipe pile frame, and the photovoltaic plate, the converter and the controller are electrically connected; the adjusting device also comprises a heating system 1, a water-resisting layer 2 and a heat-insulating layer 3; the heating system comprises a steel structure shell 11, an automatic control switch 12, a temperature sensor 13, a metal heating rod 14, a phase change material 15 and an electric wire 16; the metal heating rod is arranged in the steel structure shell, the cavity around the metal heating rod is filled with phase change materials, the automatic control switch is respectively connected with the metal heating rod and the electric wire, the temperature sensor is arranged in the steel structure shell, and the temperature sensor and the automatic control switch are electrically connected with the controller; the heat insulation layer is arranged around the PHC pipe pile 4, the water-resisting layer is arranged around the heat insulation layer, and the heating system is arranged between the heat insulation layer and the frozen soil layer 5; the phase change material is paraffin with a melting point of 2-5 ℃; the waterproof layer is made of rubber plastic waterproof material, has the thickness of 20-mm and surrounds the PHC pipe pile; the heat insulation layer is a polyurethane heat insulation board, the thickness of the heat insulation layer is 40 mm, the heat insulation layer is laid around the waterproof layer of the PHC pipe pile in a covering way, and the laying area of the heat insulation layer is adjusted according to the heat load of the PHC pipe pile; the length of the metal heating rod is about 60 cm; the steel structure shell is made of corrosion-resistant steel with the thickness of 20 mm.
Bai Tianguang volt plate absorbs sunlight, and phase change material is filled in the heating system, and paraffin with the melting point of 2-5 ℃ is filled in the heating system, and after sunlight irradiates in daytime, the phase change material absorbs heat to melt and store energy, and when the ambient temperature is low at night, the phase change material solidifies and emits heat to continuously heat the soil of the frozen soil layer. The phase change is to measure the temperature in the soil through a temperature sensor, when the temperature in the soil is lower than 1 ℃, a temperature control switch is turned on, a metal heating rod starts to heat the phase change material to absorb heat and melt, and when the temperature of the soil reaches more than 20 ℃, the temperature control switch is turned off.
The total length of the heating systems is 5m,4 active heating systems are symmetrically arranged around the PHC pipe pile, the distance between the heating systems is equal, the distance between the heating systems and the pipe pile is 200 mm, and the soil of the frozen soil layer around the pipe pile can be uniformly heated. After the earth surface layer is grooved, a polyurethane heat-insulating plate with the thickness of 40 mm is covered and paved around the PHC pipe pile, and a rubber plastic waterproof material with the thickness of 20 mm is covered and paved above the earth surface. The waterproof material and the heat insulation material are laid around the pipe pile within 1000 mm. Before the device is installed, the soil around the PHC pipe pile is required to be drilled, the device is placed in the hole and then backfilled with the soil, the device is ensured to be fully contacted with the soil, and the heat transfer effect is ensured.
The sunny daytime heating system converts the electric energy converted by the photovoltaic panel into heat energy through the heating device and releases the heat energy to adjust the temperature of soil around the piles and charge the phase change material. And when the temperature is lower at night, the phase-change material releases heat to maintain the higher temperature of soil around the piles. The delay of the freezing of the soil around the piles in the whole freezing period is realized by the continuous heat release of the daytime heating system and the temporary heat release of the phase change material at night. Waterproof materials are paved on the ground surface, rain and snow are prevented from directly entering the soil, and heat insulation materials are paved under the ground surface to help the heat of the soil to be preserved. The invention has the advantages of simple structure, convenient construction, low economic cost, convenient later maintenance and the like.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The PHC tubular pile soil thermal environment adjusting device comprises a cable, a controller, a photovoltaic bracket, a converter and a photovoltaic plate, wherein the photovoltaic plate is arranged on the photovoltaic bracket, the photovoltaic bracket is fixed on the tubular pile frame, and the photovoltaic plate, the converter and the controller are electrically connected; the method is characterized in that: the adjusting device also comprises a heating system, a water-resisting layer and a heat-insulating layer; the heating system comprises a steel structure shell, an automatic control switch, a temperature sensor, a metal heating rod, a phase change material and an electric wire; the metal heating rod is arranged in the steel structure shell, the cavity around the metal heating rod is filled with phase change materials, the automatic control switch is respectively connected with the metal heating rod and the electric wire, the temperature sensor is arranged in the steel structure shell, and the temperature sensor and the automatic control switch are electrically connected with the controller; the heat preservation sets up around PHC tubular pile, the water-resisting layer sets up around the heat preservation, heating system sets up between heat preservation and frozen soil layer.
2. The ground photovoltaic PHC pile soil thermal environment adjustment device of claim 1, wherein: the phase change material is paraffin with a melting point of 2-5 ℃.
3. The ground photovoltaic PHC pile soil thermal environment adjustment device of claim 1, wherein: the waterproof layer is made of rubber plastic waterproof material, and the thickness of the waterproof layer is 20 mm.
4. The ground photovoltaic PHC pile soil thermal environment adjustment device of claim 1, wherein: the heat preservation layer is a polyurethane heat preservation plate, and the thickness of the heat preservation layer is 40 mm.
5. The ground photovoltaic PHC pile soil thermal environment adjustment device of claim 1, wherein: the steel structure shell is made of corrosion-resistant steel with the thickness of 20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310312850.4A CN116335207A (en) | 2023-03-28 | 2023-03-28 | PHC tubular pile soil thermal environment adjusting device of ground photovoltaic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310312850.4A CN116335207A (en) | 2023-03-28 | 2023-03-28 | PHC tubular pile soil thermal environment adjusting device of ground photovoltaic |
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| Publication Number | Publication Date |
|---|---|
| CN116335207A true CN116335207A (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310312850.4A Pending CN116335207A (en) | 2023-03-28 | 2023-03-28 | PHC tubular pile soil thermal environment adjusting device of ground photovoltaic |
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| CN (1) | CN116335207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116927232A (en) * | 2023-09-13 | 2023-10-24 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
-
2023
- 2023-03-28 CN CN202310312850.4A patent/CN116335207A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116927232A (en) * | 2023-09-13 | 2023-10-24 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
| CN116927232B (en) * | 2023-09-13 | 2023-11-28 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
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