CN111500263A - Phase-change heat storage concrete structure in severe cold area - Google Patents
Phase-change heat storage concrete structure in severe cold area Download PDFInfo
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- CN111500263A CN111500263A CN201911412559.4A CN201911412559A CN111500263A CN 111500263 A CN111500263 A CN 111500263A CN 201911412559 A CN201911412559 A CN 201911412559A CN 111500263 A CN111500263 A CN 111500263A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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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
- F28D20/023—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material being enclosed in granular particles or dispersed in a porous, fibrous or cellular structure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The invention relates to the technical field of energy supply and energy conservation of buildings, in particular to a phase change heat storage concrete structure in a severe cold area. The structure comprises a phase-change material wrapper (12), a thermal coil (11), reinforced concrete (13) and a temperature sensor; the phase-change heat storage material is hermetically packaged in the phase-change material packaging device (12), and the phase-change material packaging devices (12) are arrayed in the foundation pit; the heat coil (11) is coiled around the phase change material wrapper (12) in a spiral and/or winding way; one end of the hot coil pipe (11) is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with the water separator; the heat coil pipe (11) is filled with a heat medium; the temperature sensor is arranged between the thermal coil (11) and the phase-change material wrapper (12); and the hot coil pipe (11) and the phase change material packaging device (12) are poured with reinforced concrete (13). The invention has the advantages that: (1) the structure is stable. (2) The phase-change heat storage material has the functions of slow storage and slow release. (3) The structural strength is controllable. (4) The device is suitable for heat storage and heating of the reactor of the public dry toilet septic tank. (5) The application range is wide.
Description
Technical Field
The invention relates to the technical field of energy supply and energy conservation of buildings, in particular to a phase change heat storage concrete structure in a severe cold area.
Background
The environmental conditions of the severe cold farming and pasturing areas in the plateau are special, the annual average temperature is close to or lower than 0 ℃, the slow heating period is as long as 6-10 months, and in addition, the population of the severe cold farming and pasturing areas in the plateau is rare, the matching difficulty of water, electric and thermal facilities is high, and the cost is high. Therefore, the phase-change heat storage material has high economic and social values as a building material or an auxiliary material.
The phase change heat storage building structure that prior art provided is complicated, and construction and maintenance are complicated, are difficult to promote in plateau severe cold farming-pasturing area.
In addition, the excrement and urine of the traditional public dry latrine are frozen, the environmental temperature required by the microbial metabolism of the excrement cannot be kept, and the microbial metabolism approaches to the rest. The most significant influence of the harmless weather ecological power factors (mainly air temperature) of the excrement causes that the key and effective anaerobic digestion in the harmless treatment is difficult to realize. After entering a non-heating period, the heating, digestion, decomposition and harmless treatment cannot be carried out in time, and pathogens and infectious diseases carried by people in different regions are easy to spread, so that the hidden health trouble is caused.
The population of the severe cold farming and pasturing areas in the plateau is rare, the matching difficulty of water, electricity and heat facilities is high, the cost is high, and the use of a dry toilet in a certain period is necessary. The temperature maintenance of the excrement in the heating period and the temperature rise, digestion and decomposition of the excrement in the non-heating period are key problems faced by the public dry latrine in the cold region, and if the key problems are properly solved, the application of the public dry latrine in the severe cold region has feasibility. .
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a phase change heat storage concrete structure which has the advantages of proper phase change temperature, higher material phase change latent heat, slow storage and slow release functions, outstanding stability, availability, economy and operability.
In order to achieve the purpose, the invention adopts the technical scheme that:
a phase change heat storage concrete structure in a severe cold area comprises a phase change material wrapper 12, a hot coil pipe 11, reinforced concrete 13 and a temperature sensor;
the phase-change heat storage material is hermetically packaged in the phase-change material packaging device 12, and the phase-change material packaging devices 12 are arrayed in a foundation pit;
the heat coil 11 is coiled around the phase change material wrapper 12 in a spiral and/or winding manner; one end of the hot coil pipe 11 is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with a water separator; the heating coil 11 is filled with heating medium;
the temperature sensor is arranged between the thermal coil 11 and the phase-change material wrapper 12;
the thermal coil 11 and the phase change material encapsulator 12 are cast with reinforced concrete 13.
Further, the concrete structure is arranged below the maximum frozen soil depth.
Further, a phase change material is encapsulated in the phase change material encapsulator 12; the phase change energy storage material comprises 47.89 wt% of purified water, 50.11 wt% of anhydrous calcium chloride, 1 wt% of nucleating agent borax and 1 wt% of thickener carboxymethylcellulose sodium.
Further, a porous supporting material is also arranged in the phase change material wrapper 12; the porous support material is expanded perlite particles.
Further, the phase-change material packaging device 12 is a PVC pipeline and/or a plastic barrel with a cover, and the end part of the PVC pipeline is sealed by the same material and glue.
Further, the thermal coil 11 is a PR-PE pipe.
Furthermore, the phase change temperature of the phase change energy storage material is 20-30 ℃, and the phase change latent heat is more than or equal to 100 kJ/kg.
Furthermore, the concrete structure is used as a building foundation cushion, a building wall or other structures for storing and releasing heat in the weather period and day and night.
Furthermore, the concrete structure is buried in the lower parts of the first septic tank reactor chamber and the second septic tank reactor chamber, so that the microbial activity of excrement can be kept from freezing in winter, and the excrement can be cleaned and used after being heated, decomposed and harmlessly in spring, summer and autumn.
The invention also provides a preparation and packaging method of the phase change energy storage material in the phase change energy storage concrete structure in the severe cold area.
The preparation and packaging method of the phase change energy storage material comprises the following steps:
s1, heating purified water to 40-50 ℃ according to the formula, slowly adding anhydrous calcium chloride, and stirring until the anhydrous calcium chloride is completely dissolved;
s2, weighing borax according to a formula, slowly adding the borax into the solution obtained in the step S1, and stirring until the borax is completely dissolved;
s3 weighing sodium carboxymethylcellulose according to the formula, slowly scattering into the mixed solution obtained in S2, and stirring until the sodium carboxymethylcellulose is completely dissolved to obtain a pasty glue solution;
s4, slowly adding expanded perlite particles into the pasty glue solution at 40-50 ℃, and continuously stirring until the phase-change heat storage material is fully fused into pores of the expanded perlite particles;
s5, packaging the mixture prepared in the step S4 into a PVC pipe or a plastic barrel with a sealed bottom, and sealing.
The phase change heat storage concrete structure in the severe cold area provided by the invention is characterized in that the phase change heat storage material belongs to an inorganic hydrated salt composite material and mainly comprises calcium chloride hexahydrate, a nucleating agent, a thickening agent and the like, and the porous support (matrix) material is expanded perlite particles and has the functions of pores, slow storage and slow release; the phase-change material packaging device is a PVC pipe barrel with good sealing and corrosion-resistant functions, and the hot coil pipe is a PR-PE pipe; the temperature sensor (explosion-proof) and the line pipe can realize the remote display control of the temperature; the reinforced concrete may be designed according to the building structure.
The phase change heat storage material provided by the invention has high specific heat capacity, the phase change latent heat can be stabilized to be more than 100kJ/kg and is about 25 times of the phase change latent heat of water, the phase change latent heat is dispersedly distributed and slowly stored and slowly released, the volume fraction in a concrete structure occupies a small amount, and the structural strength is controllable.
The phase-change heat storage material and the structural performance thereof are stable, the price is low, the on-site preparation is simple and safe, the heat inert and porous material is selected as the support (matrix) material, for example, the expanded perlite particles and the expanded perlite powder are mixed and stirred with the phase-change heat storage material according to a certain proportion to form the slow-storage slow-release phase-change heat storage material, the porosity is high, the inertia is strong, the elastoplasticity is good, and the slow storage and slow release are realized; the PVC pipe barrel is adopted for packaging, so that the packaging is stable and durable, the operation is convenient and fast, and the sealing performance is strong; the PR-PE heat coil pipe low-temperature heat medium is adopted for supplying heat, and the structural durability of the material is guaranteed when the temperature changes.
Under extreme weather of severe cold regions, the phase-change heat storage material and the structure thereof have the phenomenon of short supply and short demand of loads of buildings and structures and heat supply systems, the phase-change heat storage concrete structure is buried below the maximum frozen soil depth of a septic tank reactor, the scale and the load of the extreme weather collection and heat supply systems are obviously reduced by spanning the weather period, the day and night heat storage and peak regulation and slow heat release, and the heat supply safety is improved by utilizing the assistance of renewable energy sources.
When the phase change heat storage concrete structure in the severe cold area is applied to public sanitary toilets, the phase change heat storage concrete structure is buried at the lower parts of the first chamber (raw material collecting chamber) of the septic tank reactor and the second chamber (clinker digestion chamber) of the septic tank reactor, so that the microbial activity of excrement can be kept from freezing in winter, and the excrement can be cleaned and used after being heated, rotten and harmless in spring, summer and autumn. The arrangement of the phase change heat storage concrete structure and the external heat insulation structure at the lower parts of the first septic tank reactor chamber and the second septic tank reactor chamber is determined by calculation according to the heat balance. The phase-change heat storage material provided by the invention has the phase-change temperature of 20-30 ℃, is close to the suitable environment temperature required by microbial anaerobic digestion, and is suitable for heat storage and heating of a public dry toilet septic tank reactor.
The phase change heat storage concrete structure in the severe cold area provided by the invention selects relatively comfortable phase change heat storage materials with the temperature range of 20-30 ℃ such as human bodies, plants, microorganisms and the like, and is filled and poured, wherein a certain phase change latent heat is stored when the heat collection load is low, the phase change latent heat is released in extreme weather exceeding the calculated temperature, the load of a heat collection system is optimally configured, the defect of insufficient heat collection of the system is compensated, and the heat supply guarantee rate and the stability are improved.
On the basis of rigorous calculation, design experiment and preparation construction, the phase change heat storage concrete structure in the severe cold region can be used as a building foundation cushion layer, a building wall or other structural bodies for storing and releasing heat in a weather-crossing period and day and night. Such as: the bottom of the septic tank reactor and the lower cushion layer store heat and supply heat to realize harmless excrement; the civil and public building floor heating system with heat supply condition in severe cold area; the greenhouse floor heating and wall heating in the severe cold area are realized; and so on.
Compared with the prior art, the phase change heat storage concrete structure in the severe cold area has the advantages that:
(1) the structure is stable.
(2) The phase-change heat storage material has the functions of slow storage and slow release.
(3) The volume fraction of the phase-change heat storage material in a concrete structure occupies a small amount, and the structural strength is controllable.
(4) The device is suitable for heat storage and heating of the reactor of the public dry toilet septic tank.
(5) The application range is wide.
Drawings
Fig. 1 is an I-I sectional view of a phase change heat storage concrete structure in a severe cold region provided by the present invention.
Fig. 2 is a plan layout view of a thermal coil and a packer of the phase change heat storage concrete structure in the severe cold region provided by the invention.
FIG. 3 is a plan view of a septic tank reactor when the phase change heat storage concrete structure of the severe cold area provided by the invention is applied to a public washroom
In the figure, 1 is a wall body, 2 is a septic tank reactor first chamber, 3 is a septic tank reactor second chamber, 4 is a check well first, 5 is a check well second, 6 is a check well third, 7 is a feces passing opening, 8 is an inter-chamber flashboard, 9 is a water collector, 10 is a water separator, 11 is a thermal coil, 12 is a phase-change material packer, and 13 is reinforced concrete.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following examples further describe the present invention in detail, and the following examples are only used for illustrating the present invention, but not for limiting the scope of the present invention.
A phase change heat storage concrete structure in a severe cold area comprises a phase change material wrapper 12, a hot coil pipe 11, reinforced concrete 13 and a temperature sensor;
the phase-change heat storage material is hermetically packaged in the phase-change material packaging device 12, and the phase-change material packaging devices 12 are arrayed in a foundation pit;
the heat coil 11 is coiled around the phase change material wrapper 12 in a spiral and/or winding manner; one end of the hot coil pipe 11 is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with a water separator; the heating coil 11 is filled with heating medium;
the temperature sensor is arranged between the thermal coil 11 and the phase-change material wrapper 12;
the thermal coil 11 and the phase change material encapsulator 12 are cast with reinforced concrete 13.
Further, the concrete structure is arranged below the maximum frozen soil depth.
Further, a phase change material is encapsulated in the phase change material encapsulator 12; the phase change energy storage material comprises 47.89 wt% of purified water, 50.11 wt% of anhydrous calcium chloride, 1 wt% of nucleating agent borax and 1 wt% of thickener carboxymethylcellulose sodium.
Further, a porous supporting material is also arranged in the phase change material wrapper 12; the porous support material is expanded perlite particles.
Further, the phase-change material packaging device 12 is a PVC pipeline and/or a plastic barrel with a cover, and the end part of the PVC pipeline is sealed by the same material and glue.
Further, the thermal coil 11 is a PR-PE pipe.
Furthermore, the phase change temperature of the phase change energy storage material is 20-30 ℃, and the phase change latent heat is more than or equal to 100 kJ/kg.
Furthermore, the concrete structure is used as a building foundation cushion, a building wall or other structures for storing and releasing heat in the weather period and day and night.
Furthermore, the concrete structure is buried in the lower parts of the first septic tank reactor chamber and the second septic tank reactor chamber, so that the microbial activity of excrement can be kept from freezing in winter, and the excrement can be cleaned and used after being heated, decomposed and harmlessly in spring, summer and autumn.
The invention also provides a preparation and packaging method of the phase change energy storage material in the phase change energy storage concrete structure in the severe cold area.
The preparation and packaging method of the phase change energy storage material comprises the following steps:
s1, heating purified water to 40-50 ℃ according to the formula, slowly adding anhydrous calcium chloride, and stirring until the anhydrous calcium chloride is completely dissolved;
s2, weighing borax according to a formula, slowly adding the borax into the solution obtained in the step S1, and stirring until the borax is completely dissolved;
s3 weighing sodium carboxymethylcellulose according to the formula, slowly scattering into the mixed solution obtained in S2, and stirring until the sodium carboxymethylcellulose is completely dissolved to obtain a pasty glue solution;
s4, slowly adding expanded perlite particles into the pasty glue solution at 40-50 ℃, and continuously stirring until the phase-change heat storage material is fully fused into pores of the expanded perlite particles;
s5, packaging the mixture prepared in the step S4 into a PVC pipe or a plastic barrel with a sealed bottom, and sealing.
Example 1
Referring to fig. 1-2, a phase change heat storage concrete structure in a severe cold area comprises a phase change material packer 12, a thermal coil 11, reinforced concrete 13 and a temperature sensor; the phase-change heat storage material is hermetically packaged in the phase-change material packaging device 12, and the phase-change material packaging devices 12 are arrayed in a foundation pit; the heat coil 11 is coiled around the phase change material wrapper 12 in a spiral and/or winding manner; one end of the hot coil pipe 11 is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with a water separator; the heating coil 11 is filled with heating medium; the temperature sensor is arranged between the thermal coil 11 and the phase-change material wrapper 12; the thermal coil 11 and the phase change material encapsulator 12 are cast with reinforced concrete 13.
The concrete structure is arranged below the maximum frozen soil depth.
The phase change material packaging device 12 is internally packaged with a phase change energy storage material; the phase change energy storage material comprises 47.89 wt% of purified water, 50.11 wt% of anhydrous calcium chloride, 1 wt% of nucleating agent borax and 1 wt% of thickener carboxymethylcellulose sodium.
A porous supporting material is also arranged in the phase-change material wrapper 12; the porous support material is expanded perlite particles.
The phase-change material packaging device 12 is a PVC pipeline, and the end part of the PVC pipeline is plugged by the same material and glue.
The hot coil 11 is a PR-PE pipe.
The phase change temperature of the phase change energy storage material is 20-30 ℃, and the latent heat of phase change is 100 kJ/kg.
The concrete structure is used as a foundation cushion of a building.
Example 2
Referring to fig. 1 to 3, a phase change heat storage concrete structure in a severe cold area comprises a phase change material packer 12, a thermal coil 11, reinforced concrete 13 and a temperature sensor; the phase-change heat storage material is hermetically packaged in the phase-change material packaging device 12, and the phase-change material packaging devices 12 are arrayed in a foundation pit; the heat coil 11 is coiled around the phase change material wrapper 12 in a spiral and/or winding manner; one end of the hot coil pipe 11 is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with a water separator; the heating coil 11 is filled with heating medium; the temperature sensor is arranged between the thermal coil 11 and the phase-change material wrapper 12; the thermal coil 11 and the phase change material encapsulator 12 are cast with reinforced concrete 13.
The concrete structure is arranged below the maximum frozen soil depth.
The phase change material packaging device 12 is internally packaged with a phase change energy storage material; the phase change energy storage material comprises 47.89 wt% of purified water, 50.11 wt% of anhydrous calcium chloride, 1 wt% of nucleating agent borax and 1 wt% of thickener carboxymethylcellulose sodium.
A porous supporting material is also arranged in the phase-change material wrapper 12; the porous support material is expanded perlite particles.
The phase change material packaging device 12 is a plastic barrel with a cover.
The hot coil 11 is a PR-PE pipe.
The phase change temperature of the phase change energy storage material is 20-30 ℃, and the latent heat of phase change is 100 kJ/kg.
The concrete structure is buried at the lower parts of the first septic tank reactor chamber and the second septic tank reactor chamber, so that the microbial activity of excrement can be kept from freezing in winter, and the excrement can be cleaned and used after being heated, decomposed and harmlessly in spring, summer and autumn.
Example 3
A preparation and packaging method of a phase change energy storage material in a phase change heat storage concrete structure in a severe cold region.
The preparation and packaging method of the phase change energy storage material comprises the following steps:
s1 heating purified water to 45 deg.C, slowly adding anhydrous calcium chloride, and stirring to dissolve completely;
s2, weighing borax according to a formula, slowly adding the borax into the solution obtained in the step S1, and stirring until the borax is completely dissolved;
s3 weighing sodium carboxymethylcellulose according to the formula, slowly scattering into the mixed solution obtained in S2, and stirring until the sodium carboxymethylcellulose is completely dissolved to obtain a pasty glue solution;
s4, slowly adding expanded perlite particles into the pasty glue solution at 45 ℃, and continuously stirring until the phase change heat storage material is fully fused into pores of the expanded perlite particles;
s5, packaging the mixture prepared in the step S4 into a PVC pipe or a plastic barrel with a sealed bottom, and sealing.
Example 4
The phase-change heat storage material comprises 47.89% of pure water, 50.11% of anhydrous calcium chloride and borax (Na) serving as a nucleating (inhibiting) agent2B4O7·10H2O)1 percent and thickener sodium carboxymethyl cellulose (CMC)1 percent. The porous support (matrix) material is expanded perlite particles. The packaging container is a PVC pipeline DN200, the end part of the packaging container is plugged by the same material, or a covered plastic barrel with a proper size. The heat transfer and temperature increasing medium comprises PR-PE heat coil DN20 and is filled with heat mediumWater collecting and distributing device, heat medium circulating pump, etc. The structural material is (reinforced) concrete, and the structural strength, the performance, the dimension and the like are determined according to the related design requirements.
Preparing a phase-change heat storage material: take 100 kg as an example. A200L blending barrel is taken, purified water 47.89kg is poured, and the mixture is heated to 45 ℃ in a water bath and kept. 50.11kg of anhydrous calcium chloride is slowly added and stirred until the calcium chloride is completely dissolved. Adding 1kg of borax powder slowly, and stirring uniformly until the borax powder is completely dissolved. Taking 1kg of sodium carboxymethylcellulose (CMC), continuously stirring, slowly and uniformly scattering into a mixing barrel, and preparing into pasty glue solution, namely the calcium chloride hexahydrate phase-change heat storage material after the CMC and the mixed solution are fully dissolved and fused.
Packaging and masonry pouring: slowly adding expanded perlite particles into the pasty glue solution, keeping the water bath temperature at 45 ℃, uniformly stirring until the phase-change heat storage material is fully fused into pores, taking a bottom-sealed PVC pipeline or a plastic barrel, filling, sealing, building and pouring according to a pre-designed array, laying a PR-PE hot coil pipe, burying a temperature sensor and a line pipe, and maintaining to form the slow-storage slow-release phase-change heat storage concrete structure.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various changes may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are included in the protective scope of the present invention.
It should be noted that, in the foregoing embodiments, various specific technical features and steps described in the above embodiments can be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations of the features and steps are not described separately.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The utility model provides a severe cold district phase transition heat storage concrete structure which characterized in that: the structure comprises a phase-change material wrapper (12), a thermal coil (11), reinforced concrete (13) and a temperature sensor;
the phase-change heat storage material is hermetically packaged in the phase-change material packaging device (12), and the phase-change material packaging devices (12) are arrayed in the foundation pit;
the heat coil (11) is coiled around the phase change material wrapper (12) in a spiral and/or winding way; one end of the hot coil pipe (11) is connected with a water collector, the water collector is connected with a heat medium circulating pump, and the other end of the hot coil pipe is communicated with the water separator; the heat coil pipe (11) is filled with a heat medium;
the temperature sensor is arranged between the thermal coil (11) and the phase-change material wrapper (12);
and the hot coil pipe (11) and the phase change material packaging device (12) are poured with reinforced concrete (13).
2. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the concrete structure is arranged below the maximum frozen soil depth.
3. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the phase change material wrapper (12) is internally wrapped with a phase change energy storage material; the phase change energy storage material comprises 47.89 wt% of purified water, 50.11 wt% of anhydrous calcium chloride, 1 wt% of nucleating agent borax and 1 wt% of thickener carboxymethylcellulose sodium.
4. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: a porous supporting material is also arranged in the phase-change material packaging device (12); the porous support material is expanded perlite particles.
5. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the phase-change material packaging device (12) is a PVC pipeline and/or a plastic barrel with a cover, and the end part of the PVC pipeline is sealed by the same material and glue.
6. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the hot coil (11) is a PR-PE pipe.
7. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the phase change temperature of the phase change energy storage material is 20-30 ℃, and the phase change latent heat is more than or equal to 100 kJ/kg.
8. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the concrete structure is used as a building foundation cushion, a building wall or other structures for storing and releasing heat in the weather period and day and night.
9. The phase-change heat storage concrete structure for severe cold regions according to claim 1, wherein: the concrete structure is buried at the lower parts of the first septic tank reactor chamber and the second septic tank reactor chamber, so that the microbial activity of excrement can be kept from freezing in winter, and the excrement can be cleaned and used after being heated, decomposed and harmlessly in spring, summer and autumn.
10. The phase-change heat storage concrete structure in the severe cold region as claimed in claim 1, wherein the preparation and packaging method of the phase-change energy storage material comprises the following steps:
s1, heating purified water to 40-50 ℃ according to the formula, slowly adding anhydrous calcium chloride, and stirring until the anhydrous calcium chloride is completely dissolved;
s2, weighing borax according to a formula, slowly adding the borax into the solution obtained in the step S1, and stirring until the borax is completely dissolved;
s3 weighing sodium carboxymethylcellulose according to the formula, slowly scattering into the mixed solution obtained in S2, and stirring until the sodium carboxymethylcellulose is completely dissolved to obtain a pasty glue solution;
s4, slowly adding expanded perlite particles into the pasty glue solution at 40-50 ℃, and continuously stirring until the phase-change heat storage material is fully fused into pores of the expanded perlite particles;
s5, packaging the mixture prepared in the step S4 into a PVC pipe or a plastic barrel with a sealed bottom, and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911412559.4A CN111500263A (en) | 2019-12-31 | 2019-12-31 | Phase-change heat storage concrete structure in severe cold area |
Applications Claiming Priority (1)
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