CN114322046A - Heating device and heat storage method of step heat storage electric boiler - Google Patents
Heating device and heat storage method of step heat storage electric boiler Download PDFInfo
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- CN114322046A CN114322046A CN202111506436.4A CN202111506436A CN114322046A CN 114322046 A CN114322046 A CN 114322046A CN 202111506436 A CN202111506436 A CN 202111506436A CN 114322046 A CN114322046 A CN 114322046A
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- 238000005338 heat storage Methods 0.000 title claims abstract description 247
- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 12
- 150000003839 salts Chemical class 0.000 claims description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 7
- 150000004692 metal hydroxides Chemical class 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a heat supply device and a heat storage method of a stepped heat storage electric boiler, wherein the heat supply device of the stepped heat storage electric boiler comprises a heat storage electric boiler, a first heat storage assembly, a second heat storage assembly, a third heat storage assembly and a ground source heat pump, the first heat storage assembly is arranged in the heat storage electric boiler and used for storing high-temperature heat, the second heat storage assembly is arranged in the heat storage electric boiler and used for storing medium-temperature heat, so that the third heat storage assembly is arranged in the heat storage electric boiler and used for storing low-temperature heat, the first heat storage assembly, the second heat storage assembly and the third heat storage assembly are sequentially connected, and the ground source heat pump is connected with the third heat storage assembly. The heating device of the step heat storage electric boiler has the advantages of small volume, convenient use, low operation cost, high heat supply reliability, capability of meeting diversified requirements of users in different temperature ranges, and the like.
Description
Technical Field
The invention relates to the technical field of heat supply, in particular to a heating device and a heat storage method of a stepped heat storage electric boiler.
Background
The heat accumulating electric boiler is one heating device for electric heating in the valley period of power network. The device opens electric boiler at the off-peak electricity period at night and adds hot water to store the heat in the heat storage water tank, utilize the hot water in the heat storage water tank for user's heat supply daytime afterwards, thereby reach the purpose that uses off-peak power heat supply, present heat accumulation formula electric boiler all has the application in multiple scenes such as office building, district, market, industry factory building.
In the related art, the heat accumulating type electric boiler has the advantages of large volume, high operation cost and poor flexibility.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
the heat accumulating type electric boiler adopts the water tank to accumulate heat, and has the following defects at present: the heat storage temperature of the water tank is lower than 100 ℃, and the diversified demands of the heat supply temperature of users cannot be met; the water tank has larger volume due to limited water energy storage density; the heat storage water tank needs uninterrupted electric heating to maintain heat, and the operation cost is high; the water heat storage period is short, the heat storage amount is generally planned to store heat according to the heat load in the daytime, the flexibility of heat supply of equipment is poor, and the sudden event of the rapid increase of the heat load cannot be dealt with.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides the heating device of the step heat storage electric boiler, which has the advantages of simple structure, low cost and small occupied area.
The embodiment of the invention provides a heat storage method with simple steps and low cost.
The heat supply device of the step heat storage electric boiler of the embodiment of the invention comprises: a heat-storage electric boiler; the first heat storage assembly is arranged in the heat storage electric boiler and is used for storing high-temperature heat so as to provide the high-temperature heat for a high-temperature heat load; the second heat storage assembly is arranged in the heat storage electric boiler and is used for storing medium-temperature heat so as to provide the medium-temperature heat for medium-temperature heat loads; the first heat storage assembly, the second heat storage assembly and the third heat storage assembly are sequentially connected, so that the first heat storage assembly, the second heat storage assembly and the third heat storage assembly gradually absorb heat generated by the heat storage electric boiler; the ground source heat pump is connected with the third heat storage assembly, so that heat generated by geothermal resources is stored in the third heat storage assembly.
The stepped heat storage electric boiler heating device comprises a first heat storage assembly, a second heat storage assembly and a third heat storage assembly, so that the stepped heat storage mode is performed on heat generated by the heat storage electric boiler, the energy utilization efficiency is improved, and the diversified requirements of users in different temperature ranges can be met.
In some embodiments, the first heat storage assembly is a chemical heat storage device, the second heat storage assembly is a phase change heat storage device, and the third heat storage assembly is a water tank heat storage device.
In some embodiments, the chemical heat storage device has a first heat storage medium that is any one of a metal carbonate, a metal hydroxide, and a metal oxide, and the phase-change heat storage device has a second heat storage medium that is any one of a crystalline hydrated salt and a molten salt.
In some embodiments, the metal carbonate is calcium carbonate, the metal hydroxide is calcium hydroxide, and the metal oxide is any one of manganese-based, copper-based, cobalt-based materials, perovskites.
In some embodiments, the first heat storage assembly stores the high temperature heat at greater than 400 ℃.
In some embodiments, the second heat storage assembly stores the medium temperature heat in the range of 100 ℃ to 400 ℃ and the third heat storage assembly stores the low temperature heat in the range of less than 100 ℃.
In some embodiments, the heat storage electric boiler body is adapted to be connected to an external power supply device, and the heat storage electric boiler body operates in a power consumption valley period, so that the heat storage electric boiler body is stored in the first heat storage assembly, the second heat storage assembly and the third heat storage assembly, respectively.
The heat storage method of the embodiment of the present invention employs the heat supply apparatus of the stepped heat storage electric boiler of any one of the above embodiments, and the method includes the steps of, S2: the high-temperature heat generated by the heat storage electric boiler is stored in the first heat storage component, the medium-temperature heat generated by the heat storage electric boiler is stored in the second heat storage component, and the low-temperature heat generated by the heat storage electric boiler is stored in the third heat storage component.
In some embodiments, the first thermal storage assembly provides high temperature heat to the user while being used to handle sudden events of a sharp increase in thermal load, the second thermal storage assembly provides medium temperature heat to the user, and the third thermal storage assembly provides low temperature heat to the user.
In some embodiments, in the step S1, the heat-accumulating electric boiler is operated in an electricity-using valley period so as to reduce the heating cost of the heat-accumulating electric boiler.
Drawings
Fig. 1 is a schematic structural view of a heating apparatus of a stepped thermal storage electric boiler according to an embodiment of the present invention.
Reference numerals:
a stepped heat storage electric boiler heating apparatus 100;
a heat-accumulating electric boiler 1; a first heat storage assembly 2; a high-temperature thermal load 21; a second heat storage assembly 3; medium temperature thermal load 31; a third heat storage assembly 4; a low-temperature thermal load 41; a ground source heat pump 5; a power supply device 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Hereinafter, a heating apparatus of a stepped thermal storage electric boiler according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the stepped thermal storage electric boiler heating apparatus according to the embodiment of the present invention includes a thermal storage electric boiler 1, a first thermal storage assembly 2, a second thermal storage assembly 3, a third thermal storage assembly 4, and a ground source heat pump 5.
The first heat storage assembly 2 is disposed in the heat storage electric boiler 1, and the first heat storage assembly 2 is used for storing high-temperature heat so as to provide the high-temperature heat to the high-temperature heat load 21, specifically, when the heat storage electric boiler 1 works to generate heat, the first heat storage assembly 2 absorbs and stores the high-temperature heat in the heat storage electric boiler 1, and when the high-temperature heat load 21 needs the high-temperature heat or deals with an unexpected event that the heat load increases sharply, the first heat storage assembly 2 releases the heat so as to meet the demand of the high-temperature heat load 21.
The second heat storage assembly 3 is arranged in the heat storage electric boiler 1, and the second heat storage assembly 3 is used for storing the intermediate temperature heat so as to provide the intermediate temperature heat for the intermediate temperature heat load 31. Specifically, when the heat storage electric boiler 1 generates heat during operation, the second heat storage assembly 3 absorbs and stores intermediate-temperature heat in the heat storage electric boiler 1, and when the intermediate-temperature heat is needed by the intermediate-temperature heat load 31, the second heat storage assembly 3 releases the intermediate-temperature heat to meet the requirement of the intermediate-temperature heat load 31.
The third heat storage assembly 4 is arranged in the heat storage electric boiler 1, the third heat storage assembly 4 is used for storing low-temperature heat so as to provide the low-temperature heat for the low-temperature heat load 41, and the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly 4 are sequentially connected so that the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly 4 gradually absorb the heat generated by the heat storage electric boiler 1. Specifically, as shown in fig. 1, when the heat storage electric boiler 1 works to generate heat, the second heat storage assembly 3 absorbs and stores low-temperature heat in the heat storage electric boiler 1, when the low-temperature heat load 41 needs low-temperature heat, the first heat storage assembly 2 releases the low-temperature heat to meet the requirement of the low-temperature heat load 41, and the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly 4 are sequentially connected, so that the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly 4 absorb the heat generated by the work of the heat storage electric boiler 1 step by step.
It is understood that the high temperature heat load 21, the medium temperature heat load 31, and the low temperature heat load 41 refer to devices or places requiring high temperature heat, medium temperature heat, and low temperature heat, respectively.
The ground source heat pump 5 is connected with the third heat storage assembly 4 so that the heat generated by the geothermal resource is stored in the third heat storage assembly 4. Therefore, the heat energy generated by the ground source heat pump 5 is transmitted to the third heat storage assembly 4, so that the third heat storage assembly 4 can absorb and store the ground heat, and the heat energy of the heat storage electric boiler 1 is saved.
The stepped heat storage electric boiler heating device 100 provided by the embodiment of the invention is provided with the heat storage electric boiler 1, the first heat storage component 2, the second heat storage component 3 and the third heat storage component 4, so that the heat generated by the heat storage electric boiler 1 is subjected to stepped heat storage, the heat storage flexibility of the heat storage electric boiler 1 is improved, the floor area of the heat storage electric boiler 1 is reduced, the ground source heat pump 5 is arranged, geothermal energy is provided for the third heat storage component 4 through the ground source heat pump 5, and the heat of the geothermal energy is stored in the third heat storage component 4, so that the heating cost of the heat storage electric boiler 1 is reduced.
Because the energy storage density of the heat storage medium of the phase change heat storage device and the energy storage density of the heat storage medium of the thermochemical heat storage device are respectively 5 times and 10 times of that of water, the thermochemical heat storage device can store the heat at normal temperature without electric heating, and the thermochemical heat storage device can realize seasonal storage of the energy at normal temperature, in some embodiments, the first heat storage component 2 is a chemical heat storage device, the second heat storage component 3 is a phase change heat storage device, and the third heat storage component 4 is a water tank heat storage device. Thereby make high temperature heat storage in chemical heat storage equipment, the medium temperature heat storage is in phase change heat storage equipment, and the low temperature heat storage has reduced heat accumulation electric boiler 1's operation cost in water tank heat storage equipment, has further reduced heat accumulation electric boiler 1's volume to reduce heat accumulation electric boiler 1's area, make heat accumulation electric boiler 1 set up more rationally.
In some embodiments, the chemical heat storage device has a first heat storage medium (not shown in the drawings), which is any one of metal carbonate, metal hydroxide, and metal oxide. Specifically, the first heat storage medium is provided in a chemical heat storage device, which may be selected according to actual needs, for example: the chemical heat storage device is metal carbonate, or the chemical heat storage device is metal hydroxide, or the first heat storage medium is metal oxide, and the like. From this for chemical heat storage equipment sets up more rationally, has improved chemical heat storage equipment's variety.
In some embodiments, the phase change heat storage device has a second heat storage medium (not shown in the drawings), which is any one of a crystalline hydrated salt, a molten salt. Specifically, the second heat storage medium is provided in the phase change heat storage device, and the second heat storage medium is selected according to actual needs, for example, the second heat storage medium is a crystalline hydrated salt, or the second heat storage medium is a molten salt or the like. Therefore, the phase change heat storage equipment is more reasonable in arrangement, and the diversity of the phase change heat storage equipment is improved.
In some embodiments, the metal carbonate is calcium carbonate, the metal hydroxide is calcium hydroxide, and the metal oxide is any of manganese-based, copper-based, cobalt-based materials, perovskites. Therefore, the arrangement of the first heat storage medium is more reasonable, and the diversity of the first heat storage medium is improved.
In some embodiments, the first heat storage assembly 2 stores high-temperature heat more than 400 ℃, the second heat storage assembly 3 stores medium-temperature heat between 100 ℃ and 400 ℃, and the third heat storage assembly 4 stores low-temperature heat less than 100 ℃. Therefore, the heat storage capacity of the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly 4 is reasonably utilized.
Since the off-peak power is used for heat supply, the electric heat storage boiler 1 is suitable for being connected with the external power supply equipment 6, and the electric heat storage boiler 1 works in the off-peak period, so that the electric heat storage boiler 1 is respectively stored in the first heat storage assembly 2, the second heat storage assembly 3 and the third heat storage assembly. Thereby reducing the heating cost of the heat storage electric boiler 1 and ensuring the heating efficiency of the heat storage electric boiler 1.
The heat storage method of the embodiment of the present invention, which adopts the stepped heat storage electric boiler heating apparatus 100 of any one of the above embodiments, includes the steps of,
s1: the heat accumulation electric boiler 1 is used for heating. Specifically, the heat storage electric boiler 1 performs heating using electric energy.
S2: high-temperature heat generated by the heat storage electric boiler 1 is stored in the first heat storage component, medium-temperature heat generated by the heat storage electric boiler 1 is stored in the second heat storage component, and low-temperature heat generated by the heat storage electric boiler 1 is stored in the third heat storage component.
The heat storage method provided by the embodiment of the invention has the advantages of simple steps, high heat storage efficiency, low cost and the like.
In some embodiments, the first thermal storage assembly provides high temperature heat to the user while being used to handle sudden events of a sharp increase in thermal load, the second thermal storage assembly provides medium temperature heat to the user, and the third thermal storage assembly provides low temperature heat to the user. Therefore, the heat energy distribution of the heat storage method is more reasonable, and the working efficiency of the heat storage electric boiler 1 is improved.
In some embodiments, in the step S1, the heat-accumulating electric boiler 1 is operated in the electricity-using valley period so as to reduce the heating cost of the heat-accumulating electric boiler 1. Thereby making the heat storage method more reasonable. The heating cost of the heat storage electric boiler 1 is reduced.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, releasably connected, or integral; are mechanically connected, are electrically connected or are communicable with each other; directly connected, indirectly connected through intervening media, or interconnected within and between two elements or in an interactive relationship between two elements unless expressly stated otherwise. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention are understood according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature is directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature is one that is directly under or obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, the various embodiments or examples and features of the various embodiments or examples described in this specification are combined and combined by those skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a step heat accumulation electric boiler heating device which characterized in that includes:
a heat-storage electric boiler;
the first heat storage assembly is arranged in the heat storage electric boiler and is used for storing high-temperature heat so as to provide the high-temperature heat for a high-temperature heat load;
the second heat storage assembly is arranged in the heat storage electric boiler and is used for storing medium-temperature heat so as to provide the medium-temperature heat for medium-temperature heat loads;
the first heat storage assembly, the second heat storage assembly and the third heat storage assembly are sequentially connected, so that the first heat storage assembly, the second heat storage assembly and the third heat storage assembly gradually absorb heat generated by the heat storage electric boiler;
the ground source heat pump is connected with the third heat storage assembly, so that heat generated by geothermal resources is stored in the third heat storage assembly.
2. The stepped heat storage electric boiler heating apparatus according to claim 1, wherein the first heat storage component is a chemical heat storage device, the second heat storage component is a phase change heat storage device, and the third heat storage component is a water tank heat storage device.
3. The stepped thermal storage electric boiler heating apparatus according to claim 2, wherein the chemical thermal storage device has a first thermal storage medium that is any one of a metal carbonate, a metal hydroxide, and a metal oxide,
the phase change heat storage device has a second heat storage medium that is any one of a crystalline hydrated salt and a molten salt.
4. The stepped thermal storage electric boiler heating apparatus according to claim 3, wherein the metal carbonate is calcium carbonate, the metal hydroxide is calcium hydroxide, and the metal oxide is any one of manganese-based, copper-based, cobalt-based materials, and perovskite.
5. The stepped heat storage electric boiler heating apparatus according to claim 1, wherein the first heat storage assembly stores the high temperature heat more than 400 ℃.
6. The stepped heat storage electric boiler heating apparatus according to claim 1, wherein the second heat storage assembly stores the medium-temperature heat in a range of 100 ℃ to 400 ℃ and the third heat storage assembly stores the low-temperature heat in a range of less than 100 ℃.
7. The stepped thermal storage electric boiler heating apparatus according to claim 1, wherein the thermal storage electric boiler body is adapted to be connected to an external power supply device, the thermal storage electric boiler body being operated in a power-using valley period so that the thermal storage electric boilers are stored in the first heat storage unit, the second heat storage unit, and the third heat storage unit, respectively.
8. A method of storing heat, characterized by using the stepped heat storage electric boiler heating apparatus according to any one of claims 1 to 7, the method comprising the steps of,
s1: heating by using a heat storage electric boiler;
s2: the high-temperature heat generated by the heat storage electric boiler is stored in the first heat storage component, the medium-temperature heat generated by the heat storage electric boiler is stored in the second heat storage component, and the low-temperature heat generated by the heat storage electric boiler is stored in the third heat storage component.
9. The thermal storage method according to claim 8, wherein the first thermal storage assembly supplies high-temperature heat to the user while being used to cope with an abrupt event of a rapid increase in thermal load, the second thermal storage assembly supplies medium-temperature heat to the user, and the third thermal storage assembly supplies low-temperature heat to the user.
10. The heat storage method according to claim 8, wherein in the step S1, the heat storage electric boiler is operated in an electricity-using valley period so as to reduce heating costs of the heat storage electric boiler.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117739726B (en) * | 2024-02-19 | 2024-04-30 | 浙江昱华新能源科技有限公司 | High-capacity heat storage device |
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