CN105091367A - Solar heat storage device based on hydrous salts - Google Patents

Solar heat storage device based on hydrous salts Download PDF

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Publication number
CN105091367A
CN105091367A CN201510530818.9A CN201510530818A CN105091367A CN 105091367 A CN105091367 A CN 105091367A CN 201510530818 A CN201510530818 A CN 201510530818A CN 105091367 A CN105091367 A CN 105091367A
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China
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working medium
heat
solar energy
storage
pipeline
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CN201510530818.9A
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Chinese (zh)
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程晓敏
李戈
李元元
朱闯
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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Priority to CN201510530818.9A priority Critical patent/CN105091367A/en
Publication of CN105091367A publication Critical patent/CN105091367A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers

Abstract

The invention discloses a solar heat storage device based on hydrous salts. The solar heat storage device comprises a solar heat storage device shell, working medium containing pipelines and phase change heat storage material. The working medium containing pipelines and the phase change heat storage material are arranged inside the heat storage device shell. The solar heat storage device shell is provided with a working medium inlet and a working medium outlet. The working medium inlet is communicated with one end of each working medium containing pipeline, and the working medium outlet is communicated with the other end of each working medium containing pipeline. The solar heat storage device is simple in structure, large in energy storage capacity, rapid in heat charge and heat release, good in reversibility, high in heat exchange efficiency, safe, reliable, capable of saving energy, environmentally friendly and low in cost.

Description

A kind of solar energy heat-storage device based on hydrated salt
Technical field
The invention belongs to solar energy heat-storage technical field, particularly relate to a kind of solar energy heat-storage device based on hydrated salt.
Background technology
Along with human economy and social continuous fast development, the energy and environmental problem have become global key subjects.In the face of the present situation that the fossil energies such as coal, oil, natural gas are day by day exhausted, finding a kind of renewable and clean energy resource seems extremely urgent, also becomes the main contents of numerous scientists study simultaneously.Solar energy is inexhaustible because having, widely distributed, and a series of advantage such as clean and effective is pollution-free, be considered to 21 century most promising new forms of energy.Solar thermal utilization scope is the most also the most ripe, heats heat collector by solar radiant energy, directly utilizes after making heat collector absorb the heat energy of the sun.But because the radiological dispersal of solar energy, intermittence, service efficiency are low, solar energy also cannot really be come into operation on a large scale.For ensureing that solar thermal utilization is continuous, stable, carrying out expeditiously, need to utilize heat-storing device.Phase-change heat-storage material energy storage density is high, and temperature range can be utilized wide, is replace water as the ideal material of heat accumulating.Therefore high effective heat-storage device and novel heat accumulating are needed to be studied further.
Summary of the invention
The present invention is directed to the problems of the prior art, a kind of solar energy heat-storage device based on hydrated salt be provided, it has, and structure is simple, energy-conserving and environment-protective, heat exchange efficiency is high, energy storage capacity is large and safe and reliable feature.
The technical solution adopted for the present invention to solve the technical problems is: a kind of solar energy heat-storage device based on hydrated salt, comprise solar energy heat-storage crust of the device, working medium splendid attire pipeline, phase-change heat-storage material, working medium splendid attire pipeline, phase-change heat-storage material are arranged on the inside of heat-storing device shell, solar energy heat-storage crust of the device is offered working medium entrance and sender property outlet, working medium entrance is communicated with one end of working medium splendid attire pipeline, and sender property outlet is communicated with the other end of working medium splendid attire pipeline.
By technique scheme, arrange inner bag in the inner side of solar energy heat-storage crust of the device, fill insulant material between solar energy heat-storage crust of the device, inner bag, phase-change heat-storage material is contained in inner bag.The insulation material that insulation material adopts alumina silica refractory or aluminosilicate refractory fiber and mineral wool board to combine.
By technique scheme, inner bag is fixed on the inside of solar energy heat-storage crust of the device by angle iron frame.
By technique scheme, comprise multilayer working medium splendid attire pipeline, each layer working medium splendid attire pipeline is in distributing up and down, and each layer working medium splendid attire pipeline is all placed in inner bag inside.
By technique scheme, every layer of working medium splendid attire pipeline is snakelike working medium splendid attire pipeline, and one end of every layer of working medium splendid attire pipeline is all communicated with working medium entrance, and the other end of every layer of working medium splendid attire pipeline is all communicated with sender property outlet.
By technique scheme, working medium splendid attire piping unit totally 20 ~ 30 layers.Considerably increase heat exchange area, improve heat exchange efficiency.
By technique scheme, solar energy heat-storage crust of the device is cuboid.
By technique scheme, phase-change heat-storage material occupies the 70%-80% of inner bag internal volume altogether.Considerably increase the quantity of heat storage of solar energy heat-storage device.
By technique scheme, phase-change heat-storage material is Ba (OH) 28H 2o.
By technique scheme, inner bag is corrosion resistant plate material, and solar energy heat-storage crust of the device is cold-rolled carbon steel sheet material matter.
The beneficial effect that the present invention produces is: the solar energy heat-storage apparatus structure that the present invention is based on hydrated salt is simple, charge and discharge is hot rapidly, efficiency is high, reversible, utilizes angle steel support frame, ensure that the stability and safety of heat-storing device inner bag; Adopt the mode that multilayer working medium splendid attire pipeline is overlapping up and down, ensure heat-storing device inner bag uniformity of temperature profile, effectively reduce the mistake of phase-change heat-storage material cold and be separated, also increase heat exchange area simultaneously, improve heat exchange efficiency; Adopt insulation material parcel heat-storing device inner bag, reduce heat loss; Adopt the heat accumulating that latent heat of phase change is high, and increase its useful load, increase the total quantity of heat storage of phase change material device, more multi-energy can be supplied; The phase-change heat-storage material phase transformation good stability adopted, increases the stability of solar energy heat-storage device.Therefore, solar energy heat-storage apparatus structure of the present invention is simple, energy storage capacity is large, charge and discharge is hot rapidly, good reversibility, heat exchange efficiency are high, safe and reliable, energy-conserving and environment-protective and cost is low.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the embodiment of the present invention based on the solar energy heat-storage device of hydrated salt;
Fig. 2 is the embodiment of the present invention based on the solar energy heat-storage device of hydrated salt without protecgulum front view;
Fig. 3 is the embodiment of the present invention based on the solar energy heat-storage device of hydrated salt without capping top view;
In figure: 1. working medium entrance; 2. solar energy heat-storage crust of the device; 3. insulation material; 4. sender property outlet; 5. inner bag; 6. angle iron frame; 7. working medium splendid attire pipeline.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In the embodiment of the present invention, a kind of solar energy heat-storage device based on hydrated salt is provided, as shown in Figure 1-Figure 3, comprise solar energy heat-storage crust of the device 2, working medium splendid attire pipeline 7, phase-change heat-storage material, working medium splendid attire pipeline, phase-change heat-storage material are arranged on the inside of heat-storing device shell, solar energy heat-storage crust of the device is offered working medium entrance 1 and sender property outlet 4, working medium entrance is communicated with one end of working medium splendid attire pipeline, and sender property outlet is communicated with the other end of working medium splendid attire pipeline.Working medium splendid attire pipeline 7 adopts metal material, can select red copper material, pipe diameter 8mm, duct thickness 0.6mm, because the pyroconductivity of metal is high, thus improves the heat exchanger effectiveness of solar energy heat-storage device.Thermal source from solar energy, industrial exhaust heat, trough-electricity etc., can carry out source range wide, meets energy-saving and emission-reduction requirement.Heat-transfer working medium can use air, water, anti-icing fluid etc., although the conductibility of gas is bad, its working range is large, simple to operate, non-toxic, can not only use steam drive steam turbine, and can also directly utilize high temperature air to drive gas turbine, efficiency is higher.Water is easy to acquisition, price is low, security is high, is also a kind of proper heat-transfer working medium.
Further, arrange inner bag 5 in the inner side of solar energy heat-storage crust of the device, fill insulant material 3 between solar energy heat-storage crust of the device, inner bag, phase-change heat-storage material is contained in inner bag.The insulation material that insulation material adopts alumina silica refractory or aluminosilicate refractory fiber and mineral wool board to combine.
Further, inner bag is fixed on the inside of solar energy heat-storage crust of the device by angle iron frame 6.Inner bag 5 is corrosion resistant plate, thickness 1mm; Solar energy heat-storage crust of the device 2 is cold-rolled carbon steel plate, thickness 1mm; Angle iron frame 6 is steel angle structure, and specification is 40*40*4mm.
In the embodiment of the present invention, further, comprise multilayer working medium splendid attire pipeline, each layer working medium splendid attire pipeline is in distributing up and down, and each layer working medium splendid attire pipeline is all placed in inner bag inside.
Further, every layer of working medium splendid attire pipeline is snakelike working medium splendid attire pipeline, and one end of every layer of working medium splendid attire pipeline is all communicated with working medium entrance, and the other end of every layer of working medium splendid attire pipeline is all communicated with sender property outlet.
In the embodiment of the present invention, working medium splendid attire piping unit totally 20 ~ 30 layers.Considerably increase heat exchange area, improve heat exchange efficiency.
In the embodiment of the present invention, solar energy heat-storage crust of the device is cuboid.
In the embodiment of the present invention, further, phase-change heat-storage material occupies the 70%-80% of inner bag internal volume altogether.Considerably increase the quantity of heat storage of solar energy heat-storage device.Phase-change heat-storage material is contained in inner bag, consider volumetric expansion, inner bag can not be filled, then be encapsulated in inner bag by phase-change heat-storage material together with working medium splendid attire pipeline, two that only leave working medium splendid attire pipeline 2 end lead to extraneous working medium entrance 1 and sender property outlet 4.
Further, phase-change heat-storage material is Ba (OH) 28H 2o.
In the embodiment of the present invention, inner bag is corrosion resistant plate material, and solar energy heat-storage crust of the device is cold-rolled carbon steel sheet material matter.Inner bag 5 is corrosion resistant plate, thickness 1mm; Solar energy heat-storage crust of the device 2 is cold-rolled carbon steel plate, thickness 1mm; Angle iron frame 6 is steel angle structure, and specification is 40*40*4mm.
In preferred embodiment of the present invention, a kind of solar energy heat-storage device based on hydrated salt is provided, comprise solar energy heat-storage crust of the device 2, working medium splendid attire pipeline 7, phase-change heat-storage material, working medium splendid attire pipeline, phase-change heat-storage material are arranged on the inside of heat-storing device shell, solar energy heat-storage crust of the device is offered working medium entrance 1 and sender property outlet 4, working medium entrance is communicated with one end of working medium splendid attire pipeline, and sender property outlet is communicated with the other end of working medium splendid attire pipeline.Working medium splendid attire pipeline 7 adopts metal material, can select red copper material, pipe diameter 8mm, duct thickness 0.6mm, because the pyroconductivity of metal is high, thus improves the heat exchanger effectiveness of solar energy heat-storage device.Thermal source from solar energy, industrial exhaust heat, trough-electricity etc., can carry out source range wide, meets energy-saving and emission-reduction requirement.Heat-transfer working medium can use air, water, anti-icing fluid etc., although the conductibility of gas is bad, its working range is large, simple to operate, non-toxic, can not only use steam drive steam turbine, and can also directly utilize high temperature air to drive gas turbine, efficiency is higher.Water is easy to acquisition, price is low, security is high, is also a kind of proper heat-transfer working medium.Arrange inner bag 5 in the inner side of solar energy heat-storage crust of the device, fill insulant material 3 between solar energy heat-storage crust of the device, inner bag, phase-change heat-storage material is contained in inner bag.The insulation material that insulation material adopts alumina silica refractory or aluminosilicate refractory fiber and mineral wool board to combine.Inner bag is fixed on the inside of solar energy heat-storage crust of the device by angle iron frame 6.Inner bag 5 is corrosion resistant plate, thickness 1mm; Solar energy heat-storage crust of the device 2 is cold-rolled carbon steel plate, thickness 1mm; Angle iron frame 6 is steel angle structure, and specification is 40*40*4mm.Comprise multilayer working medium splendid attire pipeline, each layer working medium splendid attire pipeline is in distributing up and down, and each layer working medium splendid attire pipeline is all placed in inner bag inside.Every layer of working medium splendid attire pipeline is snakelike working medium splendid attire pipeline, and one end of every layer of working medium splendid attire pipeline is all communicated with working medium entrance, and the other end of every layer of working medium splendid attire pipeline is all communicated with sender property outlet.Working medium splendid attire piping unit totally 20 ~ 30 layers.Considerably increase heat exchange area, improve heat exchange efficiency.Solar energy heat-storage crust of the device is cuboid.Wherein phase-change heat-storage material occupies the 70%-80% of inner bag internal volume altogether.Considerably increase the quantity of heat storage of solar energy heat-storage device.Phase-change heat-storage material is contained in inner bag, consider volumetric expansion, inner bag can not be filled, then be encapsulated in inner bag by phase-change heat-storage material together with working medium splendid attire pipeline, two that only leave working medium splendid attire pipeline 2 end lead to extraneous working medium entrance 1 and sender property outlet 4.Phase-change heat-storage material is Ba (OH) 28H 2o.Inner bag is corrosion resistant plate material, and solar energy heat-storage crust of the device is cold-rolled carbon steel sheet material matter.Inner bag 5 is corrosion resistant plate, thickness 1mm; Solar energy heat-storage crust of the device 2 is cold-rolled carbon steel plate, thickness 1mm; Angle iron frame 6 is steel angle structure, and specification is 40*40*4mm.
Embodiment one: when embodiment of the present invention solar energy heat-storage device carries out heat accumulation, enters solar energy heat-storage device by the working medium heated through solar thermal collector (air or water) from working medium entrance inner, heats phase-change heat-storage material by high temperature refrigerant.Be with sensible heat mode heat accumulation before phase-change heat-storage material fusing, when phase-change heat-storage material temperature arrives phase-change heat-storage material fusing point, phase-change heat-storage material starts fusing, starts the mode store heat with latent heat of phase change.Because phase-change heat-storage material has very large enthalpy of phase change, therefore whole device can store a large amount of heat energy.When solar energy weakens or need to use heat energy, input cold working medium (cold air or cold water) by working medium entrance and enter solar energy heat-storage device, because now phase-change heat-storage material is in high temperature fused state, so due to the temperature difference, heat exchange can be produced between phase-change heat-storage material and cold working medium, thus releasing latent heat of phase change heats cold working medium, when phase-change heat-storage material is cooled to phase transition temperature, liquid phase-change heat accumulating becomes solid-state, next will release sensible heat and heat cold working medium, the heat that so just solar energy heat-storage device can be made to store is released and then is used, and due to the mode that apparatus of the present invention adopt multilayer coil pipe overlapping up and down, ensure heat accumulation inner bag uniformity of temperature profile, effectively reduce the mistake of phase-change heat-storage material cold and be separated, make apparatus of the present invention charge and discharge thermal process more than capable of circulation thousand times, greatly add the heat exchange area in heat accumulation inner bag, improve the heat exchange efficiency between working medium and phase-change heat-storage material.
Phase-change heat-storage material is Ba (OH) 28H 2o, purity is for analyzing pure (>=98.0%), and transition temperature range is 70 ~ 80 DEG C, does not experience the Ba (OH) of charge and discharge thermal process 28H 2o latent heat of phase change is 276.2J/g, and heat transferring medium is cold water.Hot working fluid is passed into by working medium entrance, after heat accumulating to be phased melts completely, passes into the cold working medium of 20 DEG C from working medium entrance, water is about 0.5m/s at velocity in pipes, and after heat exchange, sender property outlet place water temperature is 71 DEG C, and in device, charge and discharge heat completely, heat exchange efficiency is high, and heat exchange efficiency reaches more than 85%.Can be used as charge and discharge heat solar energy heat-storage device efficiently.
Embodiment two: embodiment two is substantially identical with embodiment one, and difference is: phase-change heat-storage material is Ba (OH) 28H 2o, purity is for analyzing pure (>=98.0%), and transition temperature range is 70 ~ 80 DEG C, does not experience the Ba (OH) of charge and discharge thermal process 28H 2o latent heat of phase change is 276.2J/g, and heat transferring medium is cold water.Hot working fluid is passed into by working medium entrance, after heat accumulating to be phased melts completely, pass into cold working medium from working medium entrance and phase-change heat-storage material is solidified completely, so circulation 50 times, phase-change heat-storage material fusing point is 78.0 DEG C, latent heat of phase change is 272.4J/g, and after cycle charge discharge heat 50 times, latent heat of phase change have dropped 1.4%, solar energy heat-storage device heat storage capacity is substantially constant, reversibility is good, and stability is high, is a kind of solar energy heat-storage device of good cycle.
Embodiment three: embodiment three is substantially identical with embodiment two, and difference is: phase-change heat-storage material is Ba (OH) 28H 2o, purity is for analyzing pure (>=98.0%), and transition temperature range is 70 ~ 80 DEG C, does not experience the Ba (OH) of charge and discharge thermal process 28H 2o latent heat of phase change is 276.2J/g, and heat transferring medium is cold water.Hot working fluid is passed into by working medium entrance, after heat accumulating to be phased melts completely, pass into cold working medium from working medium entrance and phase-change heat-storage material is solidified completely, so circulation 100 times, phase-change heat-storage material fusing point is 78.3 DEG C, latent heat of phase change is 267.9J/g, and after cycle charge discharge heat 100 times, latent heat of phase change have dropped 3.0%, solar energy heat-storage device heat storage capacity is substantially constant, reversibility is good, and stability is high, is a kind of solar energy heat-storage device of good cycle.
Embodiment four: embodiment four is substantially identical with embodiment three, and difference is: phase-change heat-storage material is Ba (OH) 28H 2o, purity is for analyzing pure (>=98.0%), and transition temperature range is 70 ~ 80 DEG C, does not experience the Ba (OH) of charge and discharge thermal process 28H 2o latent heat of phase change is 276.2J/g, and heat transferring medium is cold water.Hot working fluid is passed into by working medium entrance, after heat accumulating to be phased melts completely, passes into cold working medium from working medium entrance and phase-change heat-storage material is solidified completely, circulation like this 200 times, phase-change heat-storage material fusing point is 78.6 DEG C, and latent heat of phase change is 259.2J/g, after cycle charge discharge heat 200 times, latent heat of phase change have dropped 6.2%, solar energy heat-storage device heat storage capacity is substantially constant, and reversibility is good, and stability is high, a kind of solar energy heat-storage device of good cycle, more than capable of circulation thousand times.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.

Claims (10)

1. the solar energy heat-storage device based on hydrated salt, it is characterized in that, comprise solar energy heat-storage crust of the device, working medium splendid attire pipeline, phase-change heat-storage material, working medium splendid attire pipeline, phase-change heat-storage material are arranged on the inside of heat-storing device shell, solar energy heat-storage crust of the device is offered working medium entrance and sender property outlet, working medium entrance is communicated with one end of working medium splendid attire pipeline, and sender property outlet is communicated with the other end of working medium splendid attire pipeline.
2. the solar energy heat-storage device based on hydrated salt according to claim 1, it is characterized in that, arrange inner bag in the inner side of solar energy heat-storage crust of the device, fill insulant material between solar energy heat-storage crust of the device, inner bag, phase-change heat-storage material is contained in inner bag.
3. the solar energy heat-storage device based on hydrated salt according to claim 2, it is characterized in that, inner bag is fixed on the inside of solar energy heat-storage crust of the device by angle iron frame.
4. the solar energy heat-storage device based on hydrated salt according to Claims 2 or 3, is characterized in that, comprises multilayer working medium splendid attire pipeline, and each layer working medium splendid attire pipeline is in distributing up and down, and each layer working medium splendid attire pipeline is all placed in inner bag inside.
5. the solar energy heat-storage device based on hydrated salt according to claim 4, it is characterized in that, every layer of working medium splendid attire pipeline is snakelike working medium splendid attire pipeline, and one end of every layer of working medium splendid attire pipeline is all communicated with working medium entrance, and the other end of every layer of working medium splendid attire pipeline is all communicated with sender property outlet.
6. the solar energy heat-storage device based on hydrated salt according to claim 4, is characterized in that, working medium splendid attire piping unit totally 20 ~ 30 layers.
7. the solar energy heat-storage device based on hydrated salt according to Claims 2 or 3, is characterized in that, solar energy heat-storage crust of the device is cuboid.
8. the solar energy heat-storage device based on hydrated salt according to Claims 2 or 3, it is characterized in that, phase-change heat-storage material occupies the 70%-80% of inner bag internal volume altogether.
9. the solar energy heat-storage device based on hydrated salt according to Claims 2 or 3, is characterized in that, phase-change heat-storage material is Ba (OH) 28H 2o.
10. the solar energy heat-storage device based on hydrated salt according to Claims 2 or 3, is characterized in that, inner bag is corrosion resistant plate material, and solar energy heat-storage crust of the device is cold-rolled carbon steel sheet material matter.
CN201510530818.9A 2015-08-26 2015-08-26 Solar heat storage device based on hydrous salts Pending CN105091367A (en)

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CN113865123A (en) * 2021-09-30 2021-12-31 华南师范大学 Solar energy storage device and heating equipment

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