CN203928436U - The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases - Google Patents
The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases Download PDFInfo
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- CN203928436U CN203928436U CN201420362482.0U CN201420362482U CN203928436U CN 203928436 U CN203928436 U CN 203928436U CN 201420362482 U CN201420362482 U CN 201420362482U CN 203928436 U CN203928436 U CN 203928436U
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- absorption
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- medium
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
Abstract
The solar heat absorber that a kind of Absorption of Medium coefficient gradients of the utility model increases, comprises a cavity, and one end of cavity is connected with the taper plane of incidence, and the junction of cavity and the taper plane of incidence is provided with arcuation optical window, and the other end of cavity is provided with air working medium outlet; Wherein, cavity and the taper plane of incidence connect as one, and have and hold the sandwich passage that air working medium passes through, sandwich passage is positioned at the edge of the taper plane of incidence, be provided with air working medium entrance, sandwich passage is closed on optical window inner surface position, is provided with air working medium venthole; In cavity, along sunshine transmission direction, be sequentially with successively the plural porous media heat absorption sandwich layer that Absorption of Medium coefficient gradients increases.The utility model is conducive to reduce porous heat exchanger core hyperthermia radiation heat loss, raises the efficiency.The hyperthermia radiation heat flow density that is applied to optical window is low, is conducive to reduce optical window temperature, reduces optical window thermal stress damage risk.
Description
Technical field
The utility model relates to application of solar, and specifically, the utility model relates to the solar heat absorber that a kind of Absorption of Medium coefficient gradients increases.
Background technology
Solar energy porous heat dump is comprised of optical window and porous heat exchanger core.The sun light beam of assembling, through optical window, enters porous heat exchanger core and is absorbed, the heating porous heat exchanger core state that reaches a high temperature; High-pressure working medium (as air) flows through high temperature porous heat exchanger core on the other hand, is heated intensification, and HTHP working medium flows out from the outlet of porous heat dump, completes the hot transfer process of solar energy high temperature.Because porous heat exchanger core specific area is large, strong to the disturbance of working medium, therefore, solar energy porous heat exchanger core Convective Heat Transfer is good, and solar energy thermal conversion efficiency is high, has wide application prospect.
On State Intellectual Property Office of the People's Republic of China website, find 2 of patents related to the present invention, specifying information is as follows:
(1) title: a kind of novel silicon carbide foam ceramic solar energy air heat-absorbing device
Application number: 201210126405.0
Inventor: Chen Jiangdong; Chen Junze
Summary: the present invention relates to a kind of novel silicon carbide foam ceramic solar energy air heat-absorbing device, it comprises heat-insulation layer, in described heat-insulation layer inside, be provided with foam silicon carbide ceramics receiver, described foam silicon carbide ceramics receiver is that circle is with the receiver of through hole, in described heat-insulation layer one end, be provided with guiding device, described guiding device is fixedly connected with blower fan.The present invention is simple in structure, and low cost of manufacture contacts evenly good effect of heat exchange during heat exchange.
(2) title: a kind of silicon carbide foam ceramic solar energy air heat-absorbing device
Application number: 200710099039
Inventor: Wang Zhifeng, Bai Fengwu, prosperous Lee, Jinsong ZHANG
Summary: a kind of silicon carbide foam ceramic solar energy air heat-absorbing device, using silicon carbide foam ceramic material as solar absorber.Foam silicon carbide ceramics absorber [1] outside is coated with heat-insulation layer [2], radiant heat flux [3] projects silicon foam pottery absorber [1] surface or drops into Artificial black body cavity [9], by foam silicon carbide ceramics, receiving body [1] receives, cold air [4] directly receives body [1] over against radiant heat flux [3] side inflow from foam silicon carbide ceramics, obtains hot-air [5] after heat exchange; Or radiant heat flux [3] sees through quartz window [10], cold air [4] receives body [1] over against radiant heat flux [3] side or back to radiant heat flux [3] side inflow from foam silicon carbide ceramics, after heat exchange, obtain the hot-air [5] of 700 ℃-1300 ℃, foam silicon carbide ceramics receives body [1] pre-buried air conducting passage [8].The present invention is receiver radiation heat and conducting heat to air efficiently efficiently, utilizes the sensible heat of self to carry out heat accumulation simultaneously.
At present, the porous heat exchanger core of solar energy porous heat dump mainly consists of more single porous materials such as carborundum porous ceramics, refractory metal porous materials.The raw material of these porous materials are opaque to sunshine, so these porous heat exchanger cores are to the Absorption of Medium coefficient of sunshine very large [10
2(m
-1) order of magnitude], the gathering sunshine of the overwhelming majority is all absorbed at the sunshine plane of incidence place of porous heat exchanger core, causes this place to occur high temperature heat exchanger core, increases the infra-red radiation heat loss of porous heat exchanger core, reduces the photo-thermal conversion efficiency of porous heat dump.
Summary of the invention
For improving the photo-thermal conversion efficiency of porous heat dump, the utility model proposes a kind of along assembling sunshine transmission direction, the gradient media absorption coefficient solar energy porous heat dump device that Absorption of Medium coefficient increases gradually.This Absorption of Medium coefficient gradients increases the heat exchanger core district of high temperature can being absorbed heat and is arranged in the rear end of porous heat exchanger core, reduces the high temp, infrared radiation heat loss of porous heat exchanger core.
The technical scheme that the utility model provides is: the solar heat absorber that a kind of Absorption of Medium coefficient gradients increases, comprise a cavity, one end of cavity is connected with the taper plane of incidence, and the junction of cavity and the taper plane of incidence is provided with arcuation optical window, and the other end of cavity is provided with air working medium outlet; Wherein, cavity and the taper plane of incidence connect as one, and have and hold the sandwich passage that air working medium passes through, sandwich passage is positioned at the edge of the taper plane of incidence, be provided with air working medium entrance, sandwich passage is closed on optical window inner surface position, is provided with air working medium venthole; In cavity, along sunshine transmission direction, be sequentially with successively the plural porous media heat absorption sandwich layer that Absorption of Medium coefficient gradients increases.
Described porous media heat absorption sandwich layer is that Absorption of Medium coefficient is 0.1～1.0m
-1porous silica glass layer, Absorption of Medium coefficient be 1.0～10.0m
-1porous sapphire glass layer, Absorption of Medium coefficient be 100～500m
-1porous silicon carbide ceramic material layer.
Described sandwich passage is positioned at a section of cavity and is provided with a deflection plate.
The outer surface of described cavity and the taper plane of incidence is provided with heat-insulation layer.
In described cavity, the porous media heat absorption sandwich layer of next-door neighbour's optical window is reserved with and holds the air working medium inner concave that air working medium venthole flows out.
The porous media heat absorption sandwich layer of next-door neighbour's air working medium outlet in described cavity is reserved with and makes air working medium concentrate the hemispherical nest face that flows to air working medium outlet.
The beneficial effects of the utility model are:
(1) along assembling sunshine transmission direction, the Absorption of Medium coefficient gradients of porous heat absorption sandwich layer increases, and heat exchanger core high-temperature region is positioned at porous media C region, is conducive to reduce porous heat exchanger core hyperthermia radiation heat loss, raises the efficiency.
(2) the hyperthermia radiation hot-fluid of porous media C is constantly absorbed by porous media B and porous media A along journey, and radiation is low in the hyperthermia radiation heat flow density of optical window, is conducive to reduce optical window temperature, reduces optical window thermal stress damage risk.
Terminological interpretation:
Solar heat absorber-refer to will be assembled sunshine and convert to the device of high temperature heat source;
The absorbability of Absorption of Medium coefficient-medium (as glass, carborundum porous ceramics) to radiant energy.Absorption of Medium system is larger, show radiant energy in medium unit of transfer apart from time absorbed share larger.The unit of Absorption of Medium coefficient is m
-1.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model is used for explaining the utility model, does not form to improper restriction of the present utility model, wherein:
Fig. 1 is general structure schematic diagram of the present utility model.
The specific embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is general structure schematic diagram of the present utility model, as shown in Figure 1, the solar heat absorber that a kind of Absorption of Medium coefficient gradients of the present utility model increases, comprise a cavity 1, one end of cavity 1 is connected with the taper plane of incidence 2, cavity 1 is provided with arcuation optical window 3 with the junction of the taper plane of incidence 2, and the other end of cavity 1 is provided with air working medium outlet 4; Wherein, cavity 1 has and holds the sandwich passage 5 that air working medium passes through, and sandwich passage 5 is positioned at the edge of the taper plane of incidence 2, is provided with air working medium entrance 6, and sandwich passage 5 is closed on optical window 3 inner surface positions, is provided with air working medium venthole 7; In cavity 1, along sunshine transmission direction, is sequentially with successively the plural porous media heat absorption sandwich layer that Absorption of Medium coefficient gradients increases, is respectively Absorption of Medium coefficient and is 0.1～1.0 porous silica glass layer A, the porous sapphire glass layer B that Absorption of Medium coefficient is 1.0～10.0, the porous silicon carbide ceramic material layer C that Absorption of Medium coefficient is 100～500.The flow direction of high temperature air working medium in porous heat exchanger core is identical with sunshine transmission direction, is also to flow to porous media B from porous media A, then flows to porous media C, finally from air working medium outlet 4, flows out.In this way, can guarantee that the temperature of porous media A is minimum, the temperature of porous media B is taken second place, and the temperature of porous media C is the highest.Be conducive to reduce the hyperthermia radiation heat loss of porous heat exchanger core, improve heat dump efficiency.
In addition, the porous media heat absorption sandwich layer A of the interior next-door neighbour's optical window 3 of cavity 1 is reserved with the air working medium inner concave 8 that holds 7 outflows of air working medium venthole, and the porous media heat absorption sandwich layer C of 1 next-door neighbour's air working medium outlet 4 in cavity is reserved with the concentrated hemispherical nest face 9 that flows to air working medium outlet 4 of air working medium that makes.
Incident sunshine enters porous heat exchanger core A, B and C is absorbed through optical window 3, the hole muscle of the heating porous heat exchanger core state that reaches a high temperature.On the other hand, pressure-air working medium enters sandwich passage 5 from air working medium entrance 6 and carries out preheating, sandwich passage 5 is positioned at a section of cavity 1 and is provided with a deflection plate 11, after making air working medium reach sufficient preheating, from air working medium venthole 7, flow out, then injecting the heat absorption of porous heat exchanger core heats up, final high temperature high-pressure working medium flows out from heat dump outlet, completes the conversion of solar energy high temperature photo-thermal.The lateral surface of sandwich passage 5 is enclosed with heat-insulation layer 10, reduces radiation loss.
The heat loss through radiation loss of porous heat dump is the decisive factor that affects the porous heat dump thermal efficiency, and heat loss through radiation loss is directly proportional to the biquadratic of absolute temperature, and therefore, the key that reduces heat loss through radiation loss is to reduce the resulting radiation temperature of porous heat exchanger core.In the utility model, the heat loss through radiation overwhelming majority of porous media B and C is absorbed (porous media A is made by quartz glass, and quartz glass is smaller to the absorption of sunshine, but absorbs larger to the infra-red radiation of porous media B and C) by porous media A.Therefore, the heat loss through radiation loss that porous heat dump heat loss through radiation loss of the present utility model is exactly porous media A in fact, because the temperature of porous media A is low, heat loss through radiation loss is less.Therefore, the utility model Absorption of Medium coefficient gradients increases heat dump and has the higher thermal efficiency and lower optical window operating temperature and higher reliability.
The explanation of above example is just for helping to understand core concept of the present utility model; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (6)
1. the solar heat absorber that an Absorption of Medium coefficient gradients increases, it is characterized in that, comprise a cavity, one end of cavity is connected with the taper plane of incidence, the junction of cavity and the taper plane of incidence is provided with arcuation optical window, and the other end of cavity is provided with air working medium outlet; Wherein, cavity and the taper plane of incidence connect as one, and have and hold the sandwich passage that air working medium passes through, sandwich passage is positioned at the edge of the taper plane of incidence, be provided with air working medium entrance, sandwich passage is closed on optical window inner surface position, is provided with air working medium venthole; In cavity, along sunshine transmission direction, be sequentially with successively the plural porous media heat absorption sandwich layer that Absorption of Medium coefficient gradients increases.
2. the solar heat absorber that a kind of Absorption of Medium coefficient gradients according to claim 1 increases, is characterized in that, described porous media heat absorption sandwich layer is that Absorption of Medium coefficient is 0.1～1.0m
-1porous silica glass layer, Absorption of Medium coefficient be 1.0～10.0m
-1porous sapphire glass layer, Absorption of Medium coefficient be 100～500m
-1porous silicon carbide ceramic material layer.
3. the solar heat absorber that a kind of Absorption of Medium coefficient gradients according to claim 1 increases, is characterized in that, described sandwich passage is positioned at a section of cavity and is provided with a deflection plate.
4. the solar heat absorber that a kind of Absorption of Medium coefficient gradients according to claim 1 increases, is characterized in that, the outer surface of described cavity and the taper plane of incidence is provided with heat-insulation layer.
5. the solar heat absorber that a kind of Absorption of Medium coefficient gradients according to claim 1 increases, is characterized in that, in described cavity, the porous media heat absorption sandwich layer of next-door neighbour's optical window is reserved with and holds the air working medium inner concave that air working medium venthole flows out.
6. the solar heat absorber that a kind of Absorption of Medium coefficient gradients according to claim 1 increases, it is characterized in that, the porous media heat absorption sandwich layer of next-door neighbour's air working medium outlet in described cavity is reserved with and makes air working medium concentrate the hemispherical nest face that flows to air working medium outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420362482.0U CN203928436U (en) | 2014-07-01 | 2014-07-01 | The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases |
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| CN201420362482.0U CN203928436U (en) | 2014-07-01 | 2014-07-01 | The solar heat absorber that a kind of Absorption of Medium coefficient gradients increases |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413632A (en) * | 2018-01-24 | 2018-08-17 | 南京航空航天大学 | A kind of tower type solar positive displacement heat collector |
| CN108613421A (en) * | 2018-05-14 | 2018-10-02 | 上海理工大学 | It include the displacement air heat dump of modular microfluidic capsule phase change material |
| CN108645060A (en) * | 2018-04-26 | 2018-10-12 | 福建工程学院 | A kind of three layers of mixing gradient-structure solar energy high temperature heat dump |
| CN109883064A (en) * | 2019-02-01 | 2019-06-14 | 南京航空航天大学 | A kind of solar thermal collector |
-
2014
- 2014-07-01 CN CN201420362482.0U patent/CN203928436U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413632A (en) * | 2018-01-24 | 2018-08-17 | 南京航空航天大学 | A kind of tower type solar positive displacement heat collector |
| CN108413632B (en) * | 2018-01-24 | 2020-04-07 | 南京航空航天大学 | Tower type solar volumetric heat collector |
| CN108645060A (en) * | 2018-04-26 | 2018-10-12 | 福建工程学院 | A kind of three layers of mixing gradient-structure solar energy high temperature heat dump |
| CN108645060B (en) * | 2018-04-26 | 2020-09-22 | 福建工程学院 | Solar high-temperature heat absorber with three-layer mixed gradient structure |
| CN108613421A (en) * | 2018-05-14 | 2018-10-02 | 上海理工大学 | It include the displacement air heat dump of modular microfluidic capsule phase change material |
| CN108613421B (en) * | 2018-05-14 | 2019-08-30 | 上海理工大学 | It include the displacement air heat dump of modular microfluidic capsule phase change material |
| CN109883064A (en) * | 2019-02-01 | 2019-06-14 | 南京航空航天大学 | A kind of solar thermal collector |
| CN109883064B (en) * | 2019-02-01 | 2020-08-04 | 南京航空航天大学 | Solar heat collector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20170701 |
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| CF01 | Termination of patent right due to non-payment of annual fee |