CN113203114A - Phase change heat storage heating device for improving utilization rate of phase change material - Google Patents
Phase change heat storage heating device for improving utilization rate of phase change material Download PDFInfo
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- CN113203114A CN113203114A CN202110479658.5A CN202110479658A CN113203114A CN 113203114 A CN113203114 A CN 113203114A CN 202110479658 A CN202110479658 A CN 202110479658A CN 113203114 A CN113203114 A CN 113203114A
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- phase
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- heat exchange
- change material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
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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
- F28D20/021—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 and the heat-exchanging means being enclosed in one container
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a phase change heat storage and supply device for improving the utilization rate of a phase change material, which comprises an outer box body (1) and an inner heat exchange tube structure. The hot water flows in, exchanges heat with the phase-change material at the bottom, flows upwards to exchange heat with the surrounding phase-change material, and finally flows out. Because the water temperature at the lower part of the device is generally higher, the heat exchange temperature difference between the device and the phase-change material is large, and the heat exchange effect is obvious; the upper part of the device increases the heat exchange area, so that most of the phase-change materials in the device are uniformly and fully heated. Compared with the prior art, the invention has good heat storage performance and heat release performance, can store and release more heat, and has higher utilization rate and heat storage ratio of the phase-change material; the manufacturing cost is low, and the popularization is easy.
Description
Technical Field
The invention relates to the technical field of heat storage, and particularly belongs to a phase-change heat storage and supply device for improving the utilization rate of a phase-change material.
Background
The phase-change heat storage technology can store waste heat in the phase-change heat storage device at the time of the electricity consumption valley by utilizing the characteristic that the phase-change material absorbs or releases a large amount of latent heat when the phase change material generates the phase change, and the heat storage device can release the stored heat for heating instead of a heat source such as an electric boiler and the like at the time of the electricity consumption peak. Compared with sensible heat storage technology, the phase-change heat storage technology utilizes latent heat, so that the heat storage density is higher; compared with a thermochemical heat storage technology, the phase change heat storage technology is more mature and stable and is easy to control.
The phase-change heat storage device is actually a heat exchanger for realizing indirect heat exchange between hot water and a phase-change material. The heat exchange mode is various, hot water can be introduced into the pipe to exchange heat with the phase-change material outside the pipe, and the water pipe has a snakelike coil pipe, a spiral coil pipe and the like; the packaged phase-change material can be inserted into hot water contained in the box body for heat exchange, and the packaging form of the phase-change material comprises columnar packaging, annular packaging, ball packaging and the like.
The existing phase-change heat storage device for heating and heat storage mainly has the following defects:
1) due to the internal heat exchange structure and the water inlet and outlet directions of the phase-change heat storage device, the internal phase-change material may be heated unevenly, so that the actual heat storage capacity of the phase-change heat storage device is smaller than the theoretical heat storage capacity;
2) the actual heat release amount of the phase-change heat storage device is smaller than the actual heat storage amount, that is, the phase-change heat storage device cannot sufficiently release the stored heat, probably because the thermal conductivity of the phase-change material used is generally low.
3) A dead angle area in which the phase change material does not change phase exists in the phase change heat storage device, so that the utilization rate of the phase change material is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a phase-change heat storage heating device for improving the utilization rate of a phase-change material, which is used for solving the problem that the heat exchange of the phase-change material in the device is not sufficient and uniform and improving the heat storage performance and the heat release performance of the device.
The phase change heat storage and supply device for improving the utilization rate of the phase change material is realized by the following technical scheme:
a phase change heat storage heating device for improving the utilization rate of a phase change material comprises an outer box body 1 and an inner heat exchange tube structure; it is characterized in that: the external box body 1 is of an approximate cuboid structure, and phase change heat storage materials 10 are placed inside the external box body 1; the internal heat exchange tube structure comprises a main water inlet 2 and a main water outlet 3, wherein the main water inlet 2 and the main water outlet 3 are both positioned at the upper part of the external box body 1 and are respectively positioned at the left side and the right side of the upper part of the external box body 1; a water inlet main pipe 4 and a water outlet main pipe 5 are connected below the main water inlet 2 and the main water outlet 3; a plurality of groups of heat exchange branch pipes 7 are arranged below the water inlet main pipe 4 and the water outlet main pipe 5 in parallel; the heat exchange branch pipes 7 are symmetrically distributed by taking a vertical plane where the total water inlet pipe 2 and the total water outlet pipe 3 are positioned as a symmetrical plane;
a groove 11 is arranged on the upper surface of the outer box body 1, and the groove 11 is positioned between the main water inlet 2 and the main water outlet 3;
the heat exchange branch pipe 7 adopts a mode that a vertical straight pipe 12 is connected with a serpentine coil 13; the vertical straight pipes 12 of the adjacent groups of heat exchange branch pipes 7 have different lengths and are arranged in a vertically staggered mode.
Compared with the prior art, the phase-change heat storage and supply device for improving the utilization rate of the phase-change material has the following positive technical effects:
1. the phase change material has good heat storage performance and heat release performance, can store and release more heat, and has higher utilization rate and heat storage ratio of the phase change material;
2. the manufacturing cost is low, and the popularization is easy.
Drawings
FIG. 1 is a schematic diagram of an elevation view of an internal structure of a phase-change heat-storage heating apparatus for increasing utilization rate of phase-change material according to the present invention;
FIG. 2 is a schematic diagram of a water inlet main pipe of the phase-change heat-storage heating apparatus for increasing the utilization rate of the phase-change material according to the present invention;
FIG. 3 is a schematic top view of the internal structure of a phase-change heat-storage heating apparatus for increasing the utilization rate of phase-change material according to the present invention;
FIG. 4 is a partial enlarged view of a phase change heat storage heating apparatus for increasing the utilization rate of a phase change material according to the present invention;
fig. 5 is a schematic structural diagram of a fin of a phase-change heat-storage heating device for improving the utilization rate of a phase-change material according to the present invention.
Reference numerals: 1. external box, 2, total water inlet, 3, total delivery port, 4, the trunk pipe of intaking, 5, the trunk pipe of play water, 6, fin, 7, heat transfer branch pipe (12 and 13 combination promptly), 8, irritate the material mouth, 9, gas vent, 10, phase change material, 11, recess, 12, vertical straight tube, 13, serpentine coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
As shown in fig. 1 to 5, the phase-change heat-storage heating apparatus for increasing the utilization rate of phase-change material of the present invention includes an outer tank 1 and an inner heat exchange tube structure. The external box body 1 is of an approximately cuboid structure, and a groove 13 is formed in the upper surface of the external box body 1. The bottom of the external box body 1 is made into a step shape. Inside the outer box 1 is placed a phase change material 10. The appearance design of the external box body 1 can reduce the space size of the area where the phase-change material 10 without phase change is located, avoid the waste of the phase-change material and improve the utilization rate of the phase-change material.
The internal heat exchange tube structure comprises a total water inlet 2 and a total water outlet 3, wherein the total water inlet 2 and the total water outlet 3 are both positioned on the upper part of the external box body 1 and are respectively positioned on the left side and the right side of the external box body 1. A water inlet main pipe 4 and a water outlet main pipe 5 are connected below the main water inlet 2 and the main water outlet 3. And a plurality of groups of heat exchange branch pipes 7 are arranged below the water inlet main pipe 4 and the water outlet main pipe 5 in parallel.
The groove 11 is positioned between the main water inlet 2 and the main water outlet 3.
More specifically, the total water inlet 2 and the total water outlet 3 are both round pipes, and the water inlet main pipe 4 and the water outlet main pipe 5 connected with the round pipes are both rectangular pipes. In consideration of the hydraulic balance problem of the plurality of heat exchange branch pipes 7 arranged side by side, the cross section of the water inlet main pipe 4 is a trapezoidal section gradually reduced from the middle to two sides. The outlet mains 5 have the same cross-sectional design.
More specifically, the heat exchange branch pipes 7 connected with the lower parts of the water inlet main pipe 4 and the water outlet main pipe 5 are round pipes. The heat exchange branch pipe 7 adopts a mode that a vertical straight pipe 12 is connected with a serpentine coil 13; the vertical straight pipes 12 of the adjacent groups of branch pipes 7 are different in length and are arranged in a vertically staggered manner, so that the heat exchange area of the heat exchange pipes and the phase change material is enlarged, and more phase change material heat exchange is promoted; and the heat exchange branch pipes 7 are symmetrically distributed in the phase change heat storage and heating device for improving the utilization rate of the phase change material, by taking the vertical plane where the total water inlet pipe 2 and the total water outlet pipe 3 are positioned as a symmetrical plane. A material filling opening 8 is arranged beside the main water inlet 2, and an exhaust opening 9 is arranged beside the main water outlet 3. When a thermocouple is required to be placed in the phase change heat storage device to monitor the temperature change of the phase change material, the other end of the thermocouple extends out of the exhaust port 9; if a thermocouple does not need to be placed, the material filling port 8 is used as an air exhaust port, namely only one material filling port 8 and one air exhaust port 9 are reserved. The sizes of the material filling opening 8 and the exhaust opening 9 can be determined according to actual needs, and the material filling opening 8 is as large as possible so as to facilitate the pouring of more liquid phase-change materials at one time; the size of the exhaust port 9 can be appropriately reduced to reduce heat loss.
More specifically, as shown in fig. 4, a partial enlarged view of a phase-change heat-storage heating device for improving the utilization rate of a phase-change material according to the present invention is shown. The horizontal pipe of the upper half part of the serpentine coil 13 is provided with an annular fin 6.
As shown in fig. 5, a detailed structural diagram of a fin of a phase-change heat-storage heating device for improving the utilization rate of a phase-change material is shown. The annular fins 6 on the adjacent heat exchange branch pipes 7 are uniformly arranged, and the fins 6 on the adjacent heat exchange branch pipes 7 are arranged in a staggered manner, so that the distance between the adjacent heat exchange branch pipes 7 is shortened, and the problem that the phase change material between the finned-free pipes cannot be fully phase-changed due to overlarge space between the finned-free pipes is solved; however, because the two heat exchange branch pipes 7 at the middle are symmetrically arranged, the positions of fins on the two heat exchange branch pipes 7 are the same, and the distance between the two heat exchange branch pipes 7 is relatively larger.
More specifically, the outer part of the outer box body 1 is wrapped by a heat insulation layer which is made of polyurethane heat insulation material.
More specifically, the materials of the external box body 1 and the internal heat exchange tube structure are all stainless steel.
When the device is used, the phase-change material with proper phase-change temperature can be adopted according to the heat source condition of a heating system, the liquid phase-change material 10 is poured into the device from the filling port 8, and if the exhaust hole 9 is reserved, the filling port 8 can be sealed after the filling is finished, so that the heat loss is reduced.
After hot water is introduced into the heat exchange tubes of the phase change heat storage device, the hot water enters from the main water inlet 2 and flows into each group of heat exchange branch tubes 7 through the water inlet main tube 4, and the hot water firstly exchanges heat with the phase change material at the bottom through the vertical straight tube 12, upwards flows through the serpentine coil 13 to exchange heat with the surrounding phase change material, and finally flows out from the main water outlet 3 through the water outlet main tube 5. The temperature of the water in the serpentine coil 13 at the lower part of the device is generally higher, so that the temperature difference between the water and the phase-change material is large, and the heat exchange effect is obvious; although the temperature difference between the hot water in the coil pipe and the phase-change material is small, the heat exchange area is increased due to the addition of the fins 6, so that the heat exchange effect is almost the same as that of the finned-free part at the lower part of the device, and most of the phase-change material in the device is uniformly and fully heated.
Further, according to the load requirements of end users of different systems, the heat storage and release power of the phase-change heat storage device is determined, the number of each group of heat exchange branch pipes 7 in the phase-change heat storage device can be correspondingly adjusted, and at least 2 heat exchange branch pipes 7 are used in each group.
According to the phase-change heat storage and supply device for improving the utilization rate of the phase-change material, firstly, the whole structure is made of the easily-obtained stainless steel material, the price is relatively low, the property is stable, and the phase-change material cannot react with the stainless steel material; secondly, the snakelike coil pipe is simple in structure and convenient to process; high heat accumulating and releasing performance, high phase change material utilization rate and high heat releasing performanceHeat storage/release ratio(ii) a In the phase change process of the phase change material, the phase change material is hardly existed in the partial area in the cuboid box bodyThe phase change phenomenon, so the shape design of the external box body effectively reduces the filling area of the phase change material, and avoids the waste of the phase change material.
The embodiments described above are only preferred embodiments of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (7)
1. A phase change heat storage heating device for improving the utilization rate of a phase change material comprises an outer box body (1) and an inner heat exchange tube structure; it is characterized in that: the external box body (1) is of an approximate cuboid structure, and a phase change heat storage material (10) is placed in the external box body (1); the internal heat exchange tube structure comprises a main water inlet (2) and a main water outlet (3), wherein the main water inlet (2) and the main water outlet (3) are both positioned at the upper part of the external box body (1) and are respectively positioned at the left side and the right side of the upper part of the external box body (1); a water inlet main pipe (4) and a water outlet main pipe (5) are connected below the main water inlet (2) and the main water outlet (3); a plurality of groups of heat exchange branch pipes (7) are arranged below the water inlet main pipe (4) and the water outlet main pipe (5) in parallel; the heat exchange branch pipes (7) are symmetrically distributed by taking a vertical plane where the main water inlet pipe (2) and the main water outlet pipe (3) are positioned as a symmetrical plane;
a groove (11) is formed in the upper surface of the outer box body (1), and the groove (11) is formed between the main water inlet (2) and the main water outlet (3);
the heat exchange branch pipes (7) adopt a form that a vertical straight pipe (12) is connected with a serpentine coil (13); the vertical straight pipes (12) of the adjacent groups of heat exchange branch pipes (7) have different lengths and are arranged in a vertically staggered mode.
2. The phase-change heat-storage heating device for improving the utilization rate of the phase-change material as claimed in claim 1, wherein the total water inlet (2) and the total water outlet (3) are both circular tubes, the water inlet main tube (4) and the water outlet main tube (5) are both rectangular tubes, and each group of the heat exchange branch tubes (7) are both circular tubes.
3. A phase-change heat-storage heating apparatus for increasing the utilization rate of phase-change materials as claimed in claim 1, wherein a charging opening (8) is provided beside the main water inlet (2) or an exhaust opening (9) is provided beside the main water outlet (3).
4. The phase-change heat-storage heating device for improving the utilization rate of the phase-change material as claimed in claim 1, wherein the cross sections of the water inlet main pipe (4) and the water outlet main pipe (5) are trapezoidal sections gradually decreasing from the middle to the two sides.
5. The phase-change heat-storage heating device for improving the utilization rate of the phase-change material as claimed in claim 1, wherein the horizontal tubes of the upper half parts of the serpentine coils (13) of the heat exchange branch pipes (7) are uniformly provided with annular fins (6), and the fins (6) on the adjacent heat exchange branch pipes (7) are arranged in a staggered manner.
6. A phase-change heat-storage heating apparatus for increasing the utilization rate of phase-change materials as claimed in claim 1, wherein at least 2 heat exchange branch pipes (7) are provided.
7. The phase-change heat-storage heating apparatus for increasing the utilization rate of the phase-change material as claimed in claim 1, wherein the bottom of the outer case (1) is configured in a shape of a terrace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110479658.5A CN113203114A (en) | 2021-04-30 | 2021-04-30 | Phase change heat storage heating device for improving utilization rate of phase change material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110479658.5A CN113203114A (en) | 2021-04-30 | 2021-04-30 | Phase change heat storage heating device for improving utilization rate of phase change material |
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| CN113203114A true CN113203114A (en) | 2021-08-03 |
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| CN202110479658.5A Pending CN113203114A (en) | 2021-04-30 | 2021-04-30 | Phase change heat storage heating device for improving utilization rate of phase change material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2256451A1 (en) * | 2009-05-19 | 2010-12-01 | LaTherm | Heat storage device |
| CN104864756A (en) * | 2015-06-04 | 2015-08-26 | 华北电力大学 | High-temperature phase change heat accumulator adopting gradual changing fins |
| CN105509526A (en) * | 2016-01-26 | 2016-04-20 | 江苏启能新能源材料有限公司 | Medium-high temperature phase-change heat storage device |
| CN109341396A (en) * | 2018-11-19 | 2019-02-15 | 中山市健泰实业有限公司 | A kind of phase-change energy storage type heat exchanger |
| CN109654930A (en) * | 2018-12-05 | 2019-04-19 | 南京工业大学 | A kind of vertical layering phase transition heat accumulation unit based on special-shaped fin |
| CN210512750U (en) * | 2019-09-22 | 2020-05-12 | 河北远征环保科技有限公司 | Tube bundle type heat exchanger |
-
2021
- 2021-04-30 CN CN202110479658.5A patent/CN113203114A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2256451A1 (en) * | 2009-05-19 | 2010-12-01 | LaTherm | Heat storage device |
| CN104864756A (en) * | 2015-06-04 | 2015-08-26 | 华北电力大学 | High-temperature phase change heat accumulator adopting gradual changing fins |
| CN105509526A (en) * | 2016-01-26 | 2016-04-20 | 江苏启能新能源材料有限公司 | Medium-high temperature phase-change heat storage device |
| CN109341396A (en) * | 2018-11-19 | 2019-02-15 | 中山市健泰实业有限公司 | A kind of phase-change energy storage type heat exchanger |
| CN109654930A (en) * | 2018-12-05 | 2019-04-19 | 南京工业大学 | A kind of vertical layering phase transition heat accumulation unit based on special-shaped fin |
| CN210512750U (en) * | 2019-09-22 | 2020-05-12 | 河北远征环保科技有限公司 | Tube bundle type heat exchanger |
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Application publication date: 20210803 |
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