CN209763517U - Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall - Google Patents

Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall Download PDF

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Publication number
CN209763517U
CN209763517U CN201920361389.0U CN201920361389U CN209763517U CN 209763517 U CN209763517 U CN 209763517U CN 201920361389 U CN201920361389 U CN 201920361389U CN 209763517 U CN209763517 U CN 209763517U
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heat
working medium
cavity
flow channel
heat storage
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CN201920361389.0U
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颜健
彭佑多
叶笑洋
刘永祥
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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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
    • Y02E10/44Heat exchange systems

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Abstract

The utility model discloses a heat absorber with a heat storage solar cavity body and integrated flow channel and cavity wall, which comprises a heat absorber, a working medium inflow pipe and a working medium outflow pipe; the heat absorbing body is a cylindrical cavity structure with an opening at one end, and the opening end is used for receiving solar light energy collected by the solar condenser; a working medium flow passage is arranged in the side wall of the heat absorbing body; one end of the working medium flow passage is communicated with the working medium inflow pipe, and the other end of the working medium flow passage is communicated with the working medium outflow pipe; the working medium inflow pipe and the working medium outflow pipe are arranged on the heat absorbing body; an annular cavity space is arranged on the outer side of the heat absorbing body, and a phase-change heat storage medium is filled in the annular cavity space. The utility model discloses both realized the absorption solar energy of cavity wall and the function integration of heating working medium, again at the internal phase transition heat-retaining material that fills of annular chamber, realized heat energy storage, the utility model discloses still have simple structure, convenient operation, light-heat conversion efficiency height, safe and reliable's advantage.

Description

Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall
Technical Field
The utility model relates to a solar energy spotlight thermal-arrest utilizes field, in particular to runner and chamber wall integration take heat storage solar energy cavity heat absorber.
Background
The light-gathering solar thermal power generation technology gathers solar energy into a cavity heat absorber through a large-area light gathering device and heats fluid working media in the cavity heat absorber, and then drives a generator set to generate power through a thermodynamic cycle process, is one of important forms of solar thermal utilization, and is also considered as an important way for developing and utilizing clean and environment-friendly solar energy resources to solve energy shortage and environmental pollution.
The heat absorber is a core device for light-heat energy conversion in a solar thermal power generation system, and the received high-density solar light energy is used for heating a fluid working medium. The traditional heat absorber is usually formed by installing a metal coil (working medium in a pipe for heat exchange) in a cavity structure to absorb solar energy and convert the solar energy into heat energy, i.e. the metal coil is used for absorbing solar radiation energy and heating flowing working medium in the pipe. In actual operation, the metal coil has large surface energy flow density and uneven distribution, so that adverse problems such as uneven temperature distribution, large gradient and the like are easily caused, and further the internal stress of the metal coil is increased (particularly when the metal coil operates in a high-pressure environment), and even the problem of burning through caused by high-temperature hot spots is caused. These directly affect the photothermal conversion efficiency and operational safety of the heat absorber. On the other hand, the metal coiled heat absorber cannot be directly integrated with the heat storage medium, and the heat storage tank is usually additionally designed, so that the complexity and the production cost are increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a simple structure, convenient operation, light-heat conversion efficiency are high, safe and reliable's runner and chamber wall integration take heat storage solar energy cavity heat absorber, and it has both realized the function integration of the absorption solar energy of cavity wall and heating working medium, and the internal phase transition heat-retaining material that fills of annular chamber has realized the heat energy storage again.
The utility model provides a technical scheme of above-mentioned problem is:
A heat absorber with a heat storage solar cavity and integrated with a flow channel and a cavity wall comprises a heat absorber, a working medium inflow pipe and a working medium outflow pipe; the heat absorbing body is a cylindrical cavity structure with an opening at one end, and the opening end is used for receiving solar light energy collected by the solar condenser; a working medium flow passage is arranged in the side wall of the heat absorbing body; one end of the working medium flow passage is communicated with the working medium inflow pipe, and the other end of the working medium flow passage is communicated with the working medium outflow pipe; the working medium inflow pipe and the working medium outflow pipe are arranged on the heat absorbing body; an annular cavity space is arranged on the outer side of the heat absorbing body, and a phase-change heat storage medium is filled in the annular cavity space.
In foretell runner and chamber wall integration take heat storage solar energy cavity heat absorber, the heat-absorbing body be monolithic structure, be equipped with spiral helicine spiral flow path hole I in the heat-absorbing body lateral wall, be equipped with spiral helicine spiral flow path hole II in the heat-absorbing body bottom plate, spiral flow path hole I and spiral flow path hole II intercommunication form the working medium runner.
In the heat absorber with the heat storage solar cavity and the integrated runner and cavity wall, the heat absorber comprises a tubular body, a front cover plate and a rear cover plate; a plurality of vertical flow channel holes are axially arranged in the side wall of the tubular body, and are uniformly distributed along the circumferential direction; the front end of the tubular body is provided with a front cover plate, and the rear end of the tubular body is provided with a rear cover plate; the front cover plate is of an annular structure with the inner hole radius smaller than or equal to that of the tubular body, a plurality of kidney-shaped sinking grooves I are formed in the front cover plate, and the kidney-shaped sinking grooves I are uniformly distributed along the circumference where the vertical flow channel holes are located; the rear cover plate is provided with a plurality of kidney-shaped sinking grooves II which are uniformly arranged along the circumference of the vertical flow passage hole; the waist-shaped sinking grooves I and the waist-shaped sinking grooves II are arranged in a staggered mode, and a plurality of vertical flow passage holes are connected into a working medium flow passage hole; two adjacent waist-shaped sinking grooves II on the rear cover plate are respectively connected with a working medium inflow pipe and a working medium outflow pipe.
In the heat absorber with the heat storage solar cavity and the integrated flow channel and cavity wall, the outer side of the heat absorber is provided with a peripheral plate with a tubular structure, two ends of the peripheral plate are respectively connected with the heat absorber through a front sealing plate and a rear sealing plate, the front sealing plate and the rear sealing plate are both in an annular structure, the radius of an inner hole of the front sealing plate is not more than that of an inner hole of the heat absorber, and the radius of an inner hole of the rear sealing plate is equal to the radius of an outer circle of the; the outer circle radiuses of the front sealing plate and the rear sealing plate are the same as the outer diameter of the peripheral plate; the heat absorption body, the peripheral plate, the front sealing plate and the rear sealing plate jointly enclose an annular cavity space, and a feed inlet communicated with the annular cavity space is formed in the front sealing plate. The phase-change heat storage medium is supplied into the annular cavity space from the feeding hole.
In the heat absorber with the heat storage solar cavity integrating the flow channel and the cavity wall, a plurality of heat exchange fins are welded on the outer wall of the heat absorber and are uniformly distributed along the circumferential direction, and the heat exchange fins are located in the annular cavity space.
In the heat absorber with the heat storage solar cavity and the integrated flow channel and cavity wall, the heat exchange fins are of a cylindrical structure with a rectangular or triangular cross section; when the cross section of the heat exchange fin is triangular, the sharp corner points to the outside; the height of the heat exchange fins is the same as that of the heat absorbing body.
In the heat absorber with the heat storage solar cavity and the integrated runner and cavity wall, the inner surface of the heat absorber is coated with a high-temperature-resistant coating with an efficient solar energy absorption effect; the outer sides of the peripheral plate and the bottom plate of the heat absorbing body are wrapped with heat insulating materials.
In the heat absorber with the heat storage solar cavity and the integrated flow channel and cavity wall, transparent quartz glass is arranged at the opening at the front end of the heat absorber.
In the heat absorber with the heat storage solar cavity and the integrated flow channel and cavity wall, the spiral flow channel hole in the heat absorber is processed in a 3D printing mode.
In the heat absorber with the heat storage solar cavity integrating the flow channel and the cavity wall, the phase-change heat storage medium is a molten salt heat storage medium.
Compared with the prior art, the beneficial effects of the utility model are that:
The utility model has simple structure and convenient operation, and the runner for the working medium flowing is arranged in the wall surface of the cavity type heat absorber, thereby realizing the function integration of the solar energy absorption of the cavity wall surface and the working medium heating; even if the focused energy flow on the inner surface of the heat absorber is not uniformly distributed, the temperature gradient of each area can be reduced due to the high heat-conducting property of the metal body, and the temperature equalizing effect is achieved; and an annular cavity filled with a phase-change heat storage material is additionally arranged on the outer side of the cavity type heat absorbing body, so that the storage of heat energy is realized. The integral structure realizes the integration of functions such as direct storage and reutilization of the heating working medium and excessive heat energy, and the utility model discloses still have light-heat conversion efficiency height, safe and reliable's advantage.
Drawings
Figure 1 is an axonometric view of embodiment 1 of the invention
FIG. 2 is a cross-sectional view of the heat absorber and fins of FIG. 1
FIG. 3 is an external view of embodiment 1 of the present invention
Figure 4 is an axonometric view of embodiment 2 of the invention
FIG. 5 is an isometric view of the heat absorbing and storing body of FIG. 4
FIG. 6 is an isometric view of the back cover plate of FIG. 4
FIG. 7 is an isometric view of the front endplate of FIG. 4
In the figure: 1-a feed inlet; 2-front sealing plate; 3-a heat absorber; 4-peripheral plate; 5, a working medium inflow pipe; 6-heat exchange fins; 7-rear sealing plate; 8-spiral flow channel hole I; 9-a working fluid outflow pipe; 10-front cover plate; 11-rear cover plate; 12-a tubular body; 13-vertical flow channel holes; 14-waist-shaped sink II; 15-waist-shaped sink groove I.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the utility model comprises a front sealing plate 2, a heat absorbing body 3, a peripheral plate 4, a working medium inflow pipe 5, heat exchange fins 6, a rear sealing plate 7, a spiral flow passage hole 8 and a working medium outflow pipe 9. The heat absorber 3 is a cylindrical cavity structure with an opening at one end, the open end is used for receiving solar energy collected by the solar condenser, and a quartz glass plate is arranged at the opening and used for reducing radiation and convection heat loss of the heat absorber 3. The inner surface of the heat absorber 3 is coated with a high-temperature resistant coating with efficient solar energy absorption effect, and the outer side of the bottom plate is coated with a heat insulation material for reducing radiation and convection heat loss of the heat absorber 3.
As shown in fig. 2, a spiral flow channel hole i 8 is formed in the side wall of the heat absorber 3, a spiral flow channel hole ii is formed in the bottom plate 11, one end of the spiral flow channel hole i 8 is communicated with the working medium inflow pipe 5, and the working medium inflow pipe 5 is installed on the heat absorber 3; the other end of spiral flow channel hole I8 communicates with the one end of spiral flow channel hole II, and the other end of spiral flow channel hole II communicates with work substance effluence pipe 9, and work substance effluence pipe 9 sets up on the bottom plate, realizes that the work substance flows out to follow-up drive thermal power equipment from spiral flow channel hole II. Spiral flow path hole I8 and spiral flow path hole II adopt the 3D printing mode to process. The characteristics realize the function integration of solar energy absorption and working medium heating of the wall surface of the cavity, and even if the focused energy flow is not uniformly distributed on the inner surface of the heat absorber, the temperature gradient of each area can be reduced due to the high heat-conducting property of the metal body, so that the temperature-equalizing effect is achieved, and further the thermal stress and the radiation heat loss are reduced. This is an advantage that the metal coil heat absorber of the prior art does not have. In addition on the one hand, adopt the utility model discloses a heat-absorbing body can simplify the design degree of difficulty of current solar concentrator speculum shape of face, realizes the energy flow homogenization design of the interior smooth wall of heat-absorbing body very easily promptly. The prior metal coil heat absorber is difficult to realize energy flow homogenization because one side of the surface of an inner cavity formed by the metal coil always cannot directly receive the concentrated solar energy.
As shown in fig. 2, the outer side of the heat absorber 3 is provided with a peripheral plate having a tubular structure, two ends of the peripheral plate are respectively connected to the heat absorber 3 through a front sealing plate and a rear sealing plate, the front sealing plate and the rear sealing plate are both in an annular structure, and the radius of the inner hole of the front sealing plate 2 is not greater than that of the inner hole of the heat absorber 3, but is greater than that of the focusing spot focused by the solar concentrator, so that the optical loss and the heat loss can be reduced. The radius of an inner hole of the rear sealing plate is equal to the radius of an outer circle of the heat absorber 3; the outer circle radiuses of the front seal plate 2 and the rear seal plate are the same as the outer diameter of the peripheral plate 4; the heat absorbing body 3, the peripheral plate, the front sealing plate and the rear sealing plate jointly enclose an annular cavity space, the front sealing plate is provided with a feed inlet 1 communicated with the annular cavity space and used for leading in a phase change heat storage medium, and a sealing plug is arranged in the feed inlet 1. The annular cavity space is filled with a phase-change heat storage medium, and the phase-change heat storage medium is a commonly used molten salt heat storage medium in solar thermal power generation. The outer side of the peripheral plate 4 is wrapped with a heat insulation material for reducing heat dissipation loss. Therefore, the annular cavity filled with the phase-change heat storage material is additionally arranged on the outer side of the cavity type heat absorbing body, so that the integration of functions of storing and reusing the waste heat energy is directly realized, and the cavity type heat absorbing body is simple in structure, safe and reliable.
The outer wall surface of the heat absorbing body 3 is welded with a plurality of heat exchange fins 6, the heat exchange fins 6 are uniformly arranged along the circumferential direction, and the heat exchange fins 6 are of a cylindrical structure with a rectangular section or a triangular section; when the cross section is triangular, the sharp corner points to the outside. The height of the heat exchanging fins 6 is the same as that of the heat absorbing body 3. Heat exchanging fins 6 are located within the peripheral plate 4. This can improve the efficiency of thermal energy transfer when thermal energy is stored and reused.
Example 2
As shown in fig. 4, the structure is similar to that of example 1, and differs from that of example 1 in that the heat absorbing body 3 has a different structure. In this embodiment, the heat absorbing body 3 is a cylindrical cavity structure with one open end, and is composed of a tubular body 12, a front cover plate 10 and a rear cover plate 11.
A plurality of vertical flow passage holes 13 are formed in the side wall of the tubular body 12, the vertical flow passage holes 13 are uniformly distributed along the circumferential direction, and the cross-sectional geometry of the vertical flow passage holes 13 may be circular, elliptical, rectangular, triangular, or the like.
The tubular body 12 is provided at its front end with a front cover plate 10 and at its rear end with a rear cover plate 11. The front cover plate 10 is of an annular structure with the inner hole radius smaller than or equal to that of the tubular body 12, a plurality of kidney-shaped sunken grooves I15 are formed in the front cover plate 10, and the kidney-shaped sunken grooves I15 are uniformly distributed along the circumference where the vertical flow passage hole 13 is located; as shown in fig. 7. The rear cover plate 11 is provided with a plurality of kidney-shaped sinking grooves II 14, and the kidney-shaped sinking grooves II 14 are uniformly distributed along the circumference where the vertical flow passage holes 13 are located; as shown in fig. 6. Waist shape heavy groove II 14 communicates two adjacent vertical flow path holes 13, and waist shape heavy groove I15 also communicates two adjacent vertical flow path holes 13, and waist shape heavy groove I15 and waist shape heavy groove II 14 dislocation arrangement connect into a work mass flow path hole with a plurality of vertical flow path holes 13. Two adjacent kidney-shaped sunken grooves II 14 on the rear cover plate 11 are respectively connected with the working medium inflow pipe 5 and the working medium outflow pipe 9. Therefore, the working medium can enter from the working medium inflow pipe 5 and sequentially flow through all the vertical flow channel holes 13 of the heat absorbing body 3 and then flow out from the working medium outflow pipe 9. The surface of the cover plate 11 in the cavity is coated with a high-temperature resistant coating which has an efficient absorption effect on solar energy. In this structure, it is necessary to ensure the connection sealing performance between the rear cover plate 11 and the front cover plate 10 and the two end surfaces of the heat absorbing body 3, and to prevent the leakage of the working medium.
the utility model has simple structure, and not only realizes the function integration of the solar energy absorption and the working medium heating of the cavity wall surface by arranging the flow channel for the working medium flowing in the wall surface of the cavity type heat absorber, but also can focus the uneven distribution of energy flow on the inner surface of the heat absorber, and the temperature gradient of each area is reduced by the high heat conductivity of the metal body, thereby having the temperature equalizing effect; on the other hand, the annular cavity filled with the phase-change heat storage material is additionally arranged on the outer side of the cavity type heat absorbing body, so that the integration of the functions of directly storing and recycling the heating working medium and excessive heat energy is realized.

Claims (10)

1. The utility model provides a runner and chamber wall integration take heat storage solar energy cavity heat absorber, characterized by: comprises a heat absorption body, a working medium inflow pipe and a working medium outflow pipe; the heat absorbing body is a cylindrical cavity structure with an opening at one end, and the opening end is used for receiving solar light energy collected by the solar condenser; a working medium flow passage is arranged in the side wall of the heat absorbing body; one end of the working medium flow passage is communicated with the working medium inflow pipe, and the other end of the working medium flow passage is communicated with the working medium outflow pipe; the working medium inflow pipe and the working medium outflow pipe are arranged on the heat absorbing body; an annular cavity space is arranged on the outer side of the heat absorbing body, and a phase-change heat storage medium is filled in the annular cavity space.
2. the heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 1, wherein: the heat absorber is of an integral structure, a spiral flow channel hole I is formed in the side wall of the heat absorber, a spiral flow channel hole II is formed in the bottom plate of the heat absorber, and the spiral flow channel hole I is communicated with the spiral flow channel hole II to form a working medium flow channel.
3. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 1, wherein: the heat absorber comprises a tubular body, a front cover plate and a rear cover plate; a plurality of vertical flow channel holes are axially arranged in the side wall of the tubular body, and are uniformly distributed along the circumferential direction; the front end of the tubular body is provided with a front cover plate, and the rear end of the tubular body is provided with a rear cover plate; the front cover plate is of an annular structure with the inner hole radius smaller than or equal to that of the tubular body, a plurality of kidney-shaped sinking grooves I are formed in the front cover plate, and the kidney-shaped sinking grooves I are uniformly distributed along the circumference where the vertical flow channel holes are located; the rear cover plate is provided with a plurality of kidney-shaped sinking grooves II which are uniformly arranged along the circumference of the vertical flow passage hole; the waist-shaped sinking grooves I and the waist-shaped sinking grooves II are arranged in a staggered mode, and a plurality of vertical flow passage holes are connected into a working medium flow passage hole; two adjacent waist-shaped sinking grooves II on the rear cover plate are respectively connected with a working medium inflow pipe and a working medium outflow pipe.
4. The heat absorber with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 2 or 3, wherein: the outer side of the heat absorber is provided with a peripheral plate with a tubular structure, two ends of the peripheral plate are respectively connected with the heat absorber through a front sealing plate and a rear sealing plate, the front sealing plate and the rear sealing plate are both in annular structures, the radius of an inner hole of the front sealing plate is not more than that of an inner hole of the heat absorber, and the radius of an inner hole of the rear sealing plate is equal to the radius of an outer circle of the heat absorber; the outer circle radiuses of the front sealing plate and the rear sealing plate are the same as the outer diameter of the peripheral plate; the heat absorbing body, the peripheral plate, the front sealing plate and the rear sealing plate jointly enclose an annular cavity space, the front sealing plate is provided with a feeding hole communicated with the annular cavity space, and the phase-change heat storage medium is supplied into the annular cavity space through the feeding hole.
5. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 4, wherein: the heat absorber is characterized in that a plurality of heat exchange fins are welded on the outer wall of the heat absorber and are uniformly distributed along the circumferential direction, and the heat exchange fins are located in the annular cavity space.
6. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 5, wherein: the cross section of the heat exchange fin is of a rectangular or triangular columnar structure; when the cross section of the heat exchange fin is triangular, the sharp corner points to the outside; the height of the heat exchange fins is the same as that of the heat absorbing body.
7. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 5, wherein: the inner surface of the cavity of the heat absorber is coated with a high-temperature resistant coating which has an efficient absorption effect on solar energy; the outer sides of the peripheral plate and the bottom plate of the heat absorbing body are wrapped with heat insulating materials.
8. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 5, wherein: transparent quartz glass is arranged at the opening at the front end of the heat absorbing body.
9. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 2, wherein: and the spiral flow channel hole in the heat absorber is processed in a 3D printing mode.
10. The heat sink with the heat storage solar cavity integrating the flow channel and the cavity wall as claimed in claim 1, wherein: the phase-change heat storage medium is a molten salt heat storage medium.
CN201920361389.0U 2019-03-21 2019-03-21 Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall Active CN209763517U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920361389.0U CN209763517U (en) 2019-03-21 2019-03-21 Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920361389.0U CN209763517U (en) 2019-03-21 2019-03-21 Heat absorber with heat storage solar cavity and integrated flow channel and cavity wall

Publications (1)

Publication Number Publication Date
CN209763517U true CN209763517U (en) 2019-12-10

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Country Status (1)

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