CN203672211U - Phase change heat storage device and solar thermal utilization system utilizing the same - Google Patents
Phase change heat storage device and solar thermal utilization system utilizing the same Download PDFInfo
- Publication number
- CN203672211U CN203672211U CN201320281122.3U CN201320281122U CN203672211U CN 203672211 U CN203672211 U CN 203672211U CN 201320281122 U CN201320281122 U CN 201320281122U CN 203672211 U CN203672211 U CN 203672211U
- Authority
- CN
- China
- Prior art keywords
- heat
- accumulation
- phase transition
- thermal storage
- heat storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The utility model relates to a phase change heat storage device and a solar thermal utilization system utilizing the same, in particular to a heat storage device which is good in heat storage capacity, high in heat availability rate and can be applied to the solar thermal utilization system. According to the heat storage device, a plurality of independent heat storage units connected in series are adopted to achieve the heat storage with temperature gradients, latent heat of heat storage media is adopted in the heat storage process, heat storage effect and the heat utilization rate are improved, structure is simple, and the heat storage units can be adjusted flexibly according to the requirements. The heat storage device is also applied to the solar thermal utilization system, the latent heat storage capacity and sensible heat storage capacity of the heat storage media are fully utilized, the demand for the heat storage media is reduced, and structure is simplified, and the heat availability rate of solar energy is improved.
Description
Technical field
The utility model relates to a kind of heat-exchange apparatus, relates in particular to a kind of phase transition temperature gradient regenerative apparatus and has adopted the Solar Energy Heat Utilization System of this kind of phase transition temperature gradient regenerative apparatus.
Technical background
In numerous new forms of energy, solar energy because of have reserves be close to unlimited, widely distributed, can source clean etc. the advantage of uniqueness day by day receive the concern of countries in the world.But solar energy density is lower, and be subject to season, weather, geographical environment and the impact of the many factors such as day alternates with night, there is stronger randomness, intermittence and unstability.Therefore, the utilization of solar energy generally need to be carried out accumulation of heat, by the unsettled energy through accumulation of heat again Stable Release utilize, by Solar Energy Heat Utilization System solar thermal energy become a kind of can long term storage, the heat energy of sustainable stable supplying.
Solar heat-preservation technology mainly contains following six core requirements: 1. high thermal storage density; 2. high heat storage efficiency; 3. constant temperature heat release; 4. high heat availability (Exergy); The 5. less amount of expanding with heat and contract with cold; 6. regenerative apparatus is simple, easily manufacture, operation maintenance, maintenance.
In Solar Energy Heat Utilization System, conventional regenerative apparatus is traditional heat-accumulator tank at present---a kind of sensible heat regenerative apparatus that there is no thermograde, the heat storage type of this regenerative apparatus is the sensible heat accumulation of heat that utilizes fused salt, as shown in Figure 5, utilize the Solar Energy Heat Utilization System operation principle of fused salt sensible heat accumulation of heat as follows: the liquid fused salt that has low temperature in cold salt cellar, low-temperature molten salt is pressed and delivered to solar molten salt heater through cold salt pump, and the fused salt after heating is stored in hot salt cellar; High-temperature molten salt is pressed and delivered to steam generating system through pump, heated feed water, and the Steam Actuation steam turbine work of generation, the low temperature liquid fused salt that releases heat is got back in low-temperature molten salt tank, has completed the overall process of fused salt heat absorption-heat release at this point.
This traditional regenerative apparatus has following shortcoming:
1) be also heat transfer medium because fused salt is heat storage medium, and heat transfer medium can only be liquid, thus can not utilize the solid-liquid phase change latent heat of fused salt to carry out accumulation of heat, and can only utilize the sensible heat of fused salt to carry out accumulation of heat, therefore make thermal storage density large not, can not meet a 1. requirement of heat storage technology;
2) because thermal storage density is large not, causes total fused salt consumption larger, thereby make heat-accumulator tank equipment huge, therefore can not meet a 5. 6. requirement of heat storage technology.
Because adopting the Solar Energy Heat Utilization System of this sensible heat regenerative apparatus to have following shortcoming:
1) the relevant auxiliary equipment of fused salt is more.The device fabrication difficulty such as fused salt tank, fused salt heat exchanging device, pump for liquid salts are large, improved manufacturing cost, operating cost, engineering cost.
2) require high to accessory.The characteristic of fused salt causes adopting special instrument, instrument, valve etc.
3) security of system is lower.In whole system, fused salt does not allow to solidify, in order to ensure that fused salt does not solidify and needs to increase some auxiliary equipment and accessory system, has improved control difficulty.
4. therefore, people develop again three kinds of current more advanced regenerative apparatuses in succession: 1) there is no the device for storing latent heat of thermograde, 6. 5. 3. 2. 1. it having superiority, but inferior position is obvious on; 2) have the sensible heat regenerative apparatus of thermograde, 4. 3. it having superiority, but 1. 2. 5. 6. on inferior position obvious; 3) have the device for storing latent heat of thermograde, 4. 3. 2. 1. it having superiority, but 5. 6. on inferior position obvious.Therefore, above-mentioned three kinds of current more advanced regenerative apparatuses can't be taken into account six core requirements of heat storage technology simultaneously, are therefore difficult to utilize them to transform traditional Solar Energy Heat Utilization System.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned defect of existing regenerative apparatus and Solar Energy Heat Utilization System, propose a kind of high thermal storage density, high heat storage efficiency, constant temperature heat release, high heat availability (Exergy), only have again the phase transition temperature gradient regenerative apparatus of the less amount of expanding with heat and contract with cold, simple in structure, easy manufacture.A kind of Solar Energy Heat Utilization System of utilizing above-mentioned regenerative apparatus has also been proposed simultaneously, traditional Solar Energy Heat Utilization System of utilizing the accumulation of heat of fused salt sensible heat is transformed into the novel Solar Energy Heat Utilization System of utilizing heat storage medium latent-heat storage, thereby significantly reduce construction, the operating cost of the Solar Energy Heat Utilization System of knowing clearly, the economic benefit and the security that have improved system.
The utility model solves the technical scheme that its technical problem adopts:
A kind of phase transition heat accumulation unit, comprise the thermal storage unit of some series connection, described thermal storage unit comprises heat storage tank and the heat exchange base tube through heat storage tank, in heat storage tank, be equipped with can solid-liquid phase change heat storage medium, in heat exchange base tube, circulation has heat transfer medium, the import and export head and the tail series connection of the heat exchange base tube of adjacent described thermal storage unit.Each thermal storage unit, all as independently individual series connection mutually, can increase and decrease according to actual accumulation of heat demand the quantity of thermal storage unit.Top in heat storage tank has and meets the expand with heat and contract with cold space of demand of heat storage medium.When accumulation of heat, each thermal storage unit is by series sequence accumulation of heat successively, be that heat transfer medium is in the efficient heat exchange of first thermal storage unit process, by transfer of heat to the heat storage medium of first thermal storage unit, and heat transfer medium heat in the time of the heat exchange base tube outlet that arrives first thermal storage unit completes exchange, substantially do not give follow-up thermal storage unit accumulation of heat.And in the time of first thermal storage unit heat storage medium temperature rise, heat storage capacity deficiency, heat transfer medium enters the second thermal storage unit fashion amount of residual heat will, now the first thermal storage unit continues accumulation of heat until reach the accumulation of heat upper limit, and the second thermal storage unit accumulation of heat starts.Passing when the first thermal storage unit reaches the accumulation of heat upper limit, there is not heat exchange at first thermal storage unit in thermal medium, then gives next thermal storage unit accumulation of heat.According to said process, each thermal storage unit accumulation of heat successively of series connection.Adopt above-mentioned gradient accumulation of heat, make heat concentrate successively accumulation of heat in part heat storage medium, instead of divide accumulation of heat in all heat storage mediums equally.Otherwise, in the time of reverse heat release, be also that heat in part heat storage medium is first discharged, can make heat transfer medium continue to obtain higher temperature, thereby obtain higher heat availability.Therefore more thermal storage unit is set in theory and is conducive to improve heat availability.It is simple in structure that this installs each thermal storage unit, and cascaded structure each other can increase and decrease thermal storage unit according to the actual requirements, and flexibility and changeability is easy to maintenance, greatly reduces the cost of phase transition heat accumulation unit.As preferably, heat storage medium is fused salt.
As preferably, described thermal storage unit has many parallel heat exchange base tubes, the heat exchange base tube of adjacent thermal storage unit import and export between by the intermediate header series connection of transferring.Intermediate header plays shunting and collects, and makes the more uniform temperature of heat transfer medium.Therefore when being single heat exchange base tube in heat storage tank, while not needing mixed flow, intermediate header structure can be set.
As preferably, the heat exchange base tube end of two ends thermal storage unit is connected with air inlet-outlet-housing.Air inlet-outlet-housing is similar with intermediate header effect, plays shunting and collects effect.Therefore in the time being single heat exchange base tube in heat storage tank, air inlet-outlet-housing structure can be set.
As preferably, the top of heat storage tank tank wall is located in the import and export of described heat exchange base tube, and the stage casing of heat exchange base tube is positioned at heat storage tank bottom and is provided with heat exchange fin outward at tube wall, between the import and export of heat exchange base tube and stage casing, transfers by bend pipe.Heat exchange base tube in stage casing can use seamless steel pipe as heat exchange base tube, then at heat exchange base tube overcoat weldering helical fin composition, increasing helical fin is in order to increase heat exchange area, improves heat exchange efficiency.Stage casing heat exchange base tube in case part be directly placed on case at the bottom of and submerge in heat storage medium, this contact and unfixed annexation, mainly the weight of bearing heat exchange base tube at the bottom of case in order to allow, but at the bottom of not allowing expanding with heat and contract with cold of steel destroy case and heat exchange base tube.The shape of heat exchange base tube can be that straight tube can be also coiled pipe, and quantity can be one also can be many, is that level is compact arranged between heat exchange base tube.Heat exchange base tube is imported and exported and is adopted bend pipe to be connected with stage casing, makes to import and export to be arranged on heat storage tank tank wall higher position, imports and exports pipeline bottom side higher than more than heat exchange fin top 10mm, prevents that heat storage medium from overflowing.
As preferably, described heat exchange fin is set up at the bottom of heat storage tank case by load-bearing at the bottom of case, described heat storage tank tank wall upper limb offer downwards for heat exchange base tube import and export through U-lag.U-lag, higher than more than heat exchange fin top 10mm, prevents that heat storage medium from overflowing.Between the bend pipe of heat exchange base tube and tank wall U-lag, being unfixed annexation, is mainly in order not allow expanding with heat and contract with cold of heat exchange base tube destroy tank wall and heat exchange base tube.
As preferably, heat storage tank top adopts the cover closure that can renovate.
As preferably, described phase transition heat accumulation unit has at least three thermal storage units of series connection mutually.Connect and be fixedly connected with by intermediate header by several mutual heat insulation heat storage tanks, multiple heat storage tanks are the structures of connecting instead of being connected in parallel, be for regenerative apparatus makes the temperature in each heat storage tank different when accumulation of heat or the heat release, and can press series sequence formation temperature gradient successively.Like this because of multiple heat storage tanks regenerative apparatus with thermograde forming of connecting, just ensure that heat transfer medium can be with higher temperature (note: temperature when heat transfer medium is come in when this temperature more approaches accumulation of heat in the time of heat release, the heat availability (Exergy) that regenerative apparatus is described is higher) from regenerative apparatus out, thereby improve the hot quality of heat transfer medium, improved heat availability (Exergy).And the heat storage tank quantity of connecting in regenerative apparatus is more, its heat availability (Exergy) is just higher, and exothermic temperature is just more stable, so the heat storage tank quantity of connecting in regenerative apparatus can be more than 3 or 3.
As preferably, between each thermal storage unit, adopt replaceable to connect.Can require according to the accumulation of heat of heat energy utilization system the series connection quantity of flexible transformation thermal storage unit.
As preferably, each thermal storage unit has heat insulation heat-insulation layer mutually.Ensure the accumulation of heat of each thermal storage unit independence, formation temperature gradient, improves heat availability (Exergy).
The advantage of the utility model regenerative apparatus is: 1, select the series connection accumulation of heat structure that can produce thermograde to improve heat availability (Exergy) and to ensure constant temperature heat release; 2, adopt movable on-fixed connected mode or the headspace destruction regenerative apparatus that prevents from expanding with heat and contract with cold; 3, ensureing that employing has under the prerequisite of latent-heat storage method of thermograde, adopting the conventional simple easily structure of manufacture, reducing the cost of regenerative apparatus; 4, each thermal storage unit is relatively independent, and series connection mutually can increase and decrease flexibly and regulate thermal storage unit quantity to meet different accumulation of heat demands.
A kind of Solar Energy Heat Utilization System that adopts above-mentioned phase transition heat accumulation unit, comprise recovery tank, recovery tank connects drum by return circulating pump, drum delivery port connects solar energy evaporation heater and is back to drum formation vaporization cycle through forced circulation pump, drum venthole connection solar energy is crossed hot heater and is then connected to phase transition heat accumulation unit accumulation of heat import, phase transition heat accumulation unit accumulation of heat outlet connects recovery tank, and described phase transition heat accumulation unit is at least arranged in parallel two; Phase transition heat accumulation unit accumulation of heat outlet is also connected with feed pipe as heat release import, and phase transition heat accumulation unit accumulation of heat import is also connected with steam outlet pipe as heat release outlet; Described phase transition heat accumulation unit accumulation of heat import and accumulation of heat exit are provided with the valve of switching accumulation of heat-heat release.Water conservancy in drum heats through solar energy evaporation heater with aqueduct, the steam water interface producing returns drum, drum goes out vapour and enters solar energy and cross hot heater and further add thermosetting high-temperature steam and enter phase transition heat accumulation unit, after completing, accumulation of heat again becomes liquid-phase reflux to recovery tank, whole system is utilized the more heats of liquid-vapour latent heat of phase change transmission of water, the solid-liquid phase change accumulation of heat of recycling phase transition heat accumulation unit, has improved solar thermal utilization efficiency greatly.Along with the difference of intensity of illumination, adjust flux, keeps relative stability circulating ratio, ensures the safe operation of solar energy evaporation heater.Regulate drum quantity of steam according to the parameter request of the female pipe of regenerative apparatus steam inlet and intensity of illumination, and simultaneously along with the variation of liquid level of steam drum, pressure, regulate inflow.System at least comprises two regenerative apparatuses, and the steam in drum, to regenerative apparatus, forms condensate water to recovery tank after heat release.Complete when one of them regenerative apparatus heat accumulation, be switched to another regenerative apparatus and carry out heat accumulation.Now, can carry out heat utilization to the complete regenerative apparatus of heat accumulation as required, the soft water through water treatment is transported to the complete regenerative apparatus of heat accumulation by feed pipe, and the steam that can obtain after heating needing is sent from venthole.Each regenerative apparatus is switchover operation between accumulation of heat and these two states of heat release.Multiple regenerative apparatuses can hocket accumulation of heat and heat release, ensure the lasting supply of heat energy.
A kind of method of operation of Solar Energy Heat Utilization System, heat-accumulating process is: the water in drum enters solar energy evaporation heater through forced circulation pump, the steam water interface producing returns drum, drum goes out vapour and enters solar energy and cross hot heater and further after heating, deliver to one of them regenerative apparatus, after heat exchange, form condensate water to recovery tank, when a regenerative apparatus heat accumulation complete, be switched to other regenerative apparatus and carry out heat accumulation, according to the liquid level of recovery tank, pressure and liquid level of steam drum, the quantity of circulating water of the situation control return circulating pump of pressure is to drum replenishment cycles water, exothermic process is: feed pipe will be transported to the complete regenerative apparatus of heat accumulation through the soft water of water treatment, completes evaporation, overheated overall process, from the steam of steam outlet pipe acquiring demand parameter in regenerative apparatus.
The utility model Solar Energy Heat Utilization System advantage is: 1, heat availability (Exergy) height, less heat exchange number of times, and the mode of employing thermograde accumulation of heat, make system-wide heat availability (Exergy) loss less.2, reduce the intermediate heat switching equipment such as preheater, evaporimeter, superheater, therefore reduced heat loss and cost, reduced the designing requirement of pump, valve and pipeline simultaneously, improved the stability of system.3, because fused salt is not re-used as heat transfer medium only as heat storage medium, therefore fused salt no longer needs to flow, solved the long distance of fused salt and carried the problem of easily solidifying, improved the possibility of the large-scale application of system.4, utilize the latent heat of phase change of heat storage medium to carry out accumulation of heat, relatively originally only utilize the system of liquid fused salt sensible heat accumulation of heat, this system not only can be utilized latent heat of phase change, can also utilize sensible heat solid-state, liquid heat storage medium, widen the temperature range of accumulation of heat, improve the thermal storage density of heat storage medium, significantly reduced the amount of the heat storage medium needing.5, utilize water to replace fused salt as heat transfer medium, also reduced the heat storage medium amount needing, utilize the phase transformation of water to improve heat-transfer capability.6, the non-at-scene manufacture of regenerative apparatus, has reduced the difficulty of site operation.
Brief description of the drawings
Fig. 1 is a kind of heat storage device structure schematic diagram of the utility model.
Fig. 2 is the utility model Fig. 1 structure top view.
Fig. 3 is the single thermal storage unit structural representation of the utility model.
Fig. 4 is the side view of the utility model Fig. 3.
Fig. 5 is the Solar Energy Heat Utilization System schematic diagram of the fused salt sensible heat accumulation of heat mentioned in the utility model background technology.
Fig. 6 is a kind of Solar Energy Heat Utilization System schematic diagram that the utility model utilizes fused salt latent-heat storage.
In figure: 1-steam state heat transfer medium inlet/outlet pipe, 2-steam state heat transfer medium air inlet-outlet-housing, the 3-the first thermal storage unit, 4-intermediate header, the 5-the second thermal storage unit, 6-heat storage tank, the 7-the three thermal storage unit, 8-liquid heat transfer medium air inlet-outlet-housing, 9-liquid heat transfer medium inlet/outlet pipe, 10-heat-insulation layer, 11-heat exchange base tube, 12-heat exchange fin, at the bottom of 13-case, 14-tank wall, 15-case lid, 16-cold salt cellar, 17-cold salt pump, 18-solar molten salt heater, 19-hot salt cellar, 20-hot salt pump, 21-superheater, 22---drum, 23---evaporimeter, 24-preheater, 25-recovery tank, 26-return circulating pump, 27-drum, 28-forced circulation pump, 29-solar energy evaporation heater, 30-solar energy is crossed hot heater, 31-regenerative apparatus A, 32-regenerative apparatus B, 33-feed pipe, 34-steam outlet pipe.
Detailed description of the invention
Also by reference to the accompanying drawings the utility model is further illustrated below by specific embodiment.
Embodiment 1: a kind of phase transition heat accumulation unit, as shown in Figure 1 and Figure 2.This device adopts water as heat transfer medium, adopts fused salt as heat storage medium.This device comprises steam state heat transfer medium inlet/outlet pipe 1, steam state heat transfer medium air inlet-outlet-housing 2, the first thermal storage unit 3, the intermediate header 4 of series connection successively, the second thermal storage unit 5, intermediate header 4, the 3rd thermal storage unit 7, liquid heat transfer medium air inlet-outlet-housing 8, liquid heat transfer medium inlet/outlet pipe 9; The separate heat of carrying out of heat-insulation layer of whole regenerative apparatus outer wrapping heat-insulation layer 10 and each thermal storage unit is isolated.Single thermal storage unit comprises heat storage tank 6 and three parallel heat exchange base tubes 11 through heat storage tank, the import and export of three heat exchange base tubes are all erected on the two side of heat storage tank and stretch out that casing is outer connects with steam state heat transfer medium air inlet-outlet-housing 2, intermediate header 4 or liquid heat transfer medium air inlet-outlet-housing 8, and are fixedly connected with.Steam state heat transfer medium air inlet-outlet-housing 2, intermediate header 4 and liquid heat transfer medium air inlet-outlet-housing 8 play shunting and collect, and make the more uniform temperature of heat transfer medium.Heat-insulation layer 10 is wrapped in whole regenerative apparatus and plays function of heat insulation, and heat-insulation layer 10 materials can be rock wool, aluminium silicate wool or mineral wool etc.
Steam state heat transfer medium air inlet-outlet-housing 2 one sides are opened a heat transfer medium and are imported and exported interface holes, make it to be fixedly connected with steam state heat transfer medium inlet/outlet pipe 1; Opposite side is opened a round, makes it to be fixedly connected with heat exchange base tube 11 overhanging in heat storage tank 6, and the hole number that begins to rehearse is determined by heat exchange base tube 11 quantity of welding mutually with it.Intermediate header 4 both sides are fixedly connected with heat exchange base tube 11 overhanging in corresponding heat storage tank 6 respectively.Liquid heat transfer medium air inlet-outlet-housing 8 adopts identical syndeton to be connected with liquid heat transfer medium inlet/outlet pipe 9 with steam state heat transfer medium air inlet-outlet-housing 2.
As shown in Figure 3, Figure 4, single thermal storage unit comprises heat storage tank 6 and three parallel heat exchange base tubes 11.The stage casing tube wall of heat exchange base tube 11 is provided with the heat exchange fin 12 of spiral surrounding, and heat exchange fin 12 covers are welded in heat exchanger tube 11 outsides and form finned tube.Heat storage tank 6 comprises at the bottom of case 13, tank wall 14, case lid 15 3 parts compositions, at the bottom of case 13 and tank wall 14 be directly welded into casing, as the container of splendid attire fused salt, and case lid 15 is for can open flip structure.
Heat storage medium is that in the clearance space being directly contained in heat storage tank 6 and between finned tube, highly just do not have the heat exchange fin 12 of finned tube and heat storage medium is not flow in heat storage tank 6; Heat transfer medium flows 11 li of heat exchange base tubes.
Finned tube can use seamless steel pipe as heat exchange base tube 11, then forms available CO at the heat exchange fin 12 of heat exchange base tube 11 overcoats weldering spirals
2gas shield electrode holder heat exchange base tube 11 welds into finned tube with heat exchange fin 12; Increasing helical fin 12 is in order to increase heat exchange area, improves heat exchange efficiency.Finned tube part is to be directly placed at the bottom of case 13 and submerge in heat storage medium in case, and this contact and unfixed annexation are mainly in order to allow 13 weight of bearing finned tube at the bottom of case, but does not allow expanding with heat and contract with cold of steel destroy at the bottom of case 13 and finned tube.Concrete finned tube dimensions can be: the long 2 ~ 12m of heat exchange base tube 11, heat exchange base tube 11 diameter DN10 ~ 150, heat exchange fin 12 pitch 3 ~ 15mm, height 5 ~ 40mm.
As shown in Figure 4, heat exchange base tube 11 with the annexation of tank wall 14 is: the S type that curves is imported and exported at the two ends of heat exchange base tube 11, have the U-shaped groove of a row in the upper end of tank wall 14 corresponding heat exchange office quantity again, the bottom of U-shaped groove should spill into outside case to prevent fused salt higher than the helical fin 12 about 10mm in top, just can directly heat exchange base tube 11 be imported and exported easily on the U-shaped groove that card is placed on tank wall 14 in when assembling like this, the base tube of heat exchange simultaneously 11 also can freely pass through tank wall 14, does not allow expanding with heat and contract with cold of steel destroy tank wall 14 and heat exchange base tube 11.Case lid 15 directly covers on tank wall 14 and the weight that allows tank wall 14 bear case lid 15, and case lid 15 edges are welded with profile and can better cover on tank wall 14, leaves certain gap to the casing slot milling that expands with heat and contract with cold between tank wall 14 and case lid profile.
The course of work of regenerative apparatus is divided accumulation of heat and heat release.Because the course of work is relevant with the physical property of heat transfer medium, heat storage medium, first to determine the parameter of heat transfer medium and heat storage medium.It is 8.83MPa, the superheated steam of 535 DEG C that exothermic process goes out vapour parameter, and the feed temperature of exothermic process is 180 DEG C.Selected heat-accumulating process intake condition is 11MPa, the superheated steam of 560 DEG C.Heat storage medium is fused salt (main component is sodium nitrate), and fusing point is 308 DEG C.
For convenience of description, the initial temperature of supposing fused salt is 180 DEG C.In heat-accumulating process, 11MPa, when the water vapour of 560 DEG C starts, outlet is for a little more than the hot water of 180 DEG C, and to fused salt all after fusing, or remaining fused salt is cannot absorb the heat of condensation of steam time, occurs moist steam, now indicates that heat-accumulating process finishes.Equally, can reach the water vapour a little less than 560 DEG C of high temperature with 180 DEG C of reverse heat-obtainings of hot water steam out, and the variations in temperature of fused salt interval is from 180 DEG C to a little less than 560 DEG C.Detailed process is as follows:
1, accumulation of heat:
1. the accumulation of heat first stage: pass into 11MPa in steam state heat transfer medium air inlet-outlet-housing 2, 560 DEG C of superheated steams, the solid-state fused salt heat absorption of the first 180 DEG C of thermal storage unit 3 shell-sides becomes the liquid fused salt a little less than 560 DEG C, when the first thermal storage unit 3 heat storage capacities are when enough, 560 DEG C of superheated steam heat releases of the first thermal storage unit 3 pipe side become a little more than flowing into intermediate header after the hot water of 180 DEG C, again through the second thermal storage unit 5 pipe sides, intermediate header, the 3rd thermal storage unit 7 pipe sides, liquid heat transfer medium air inlet-outlet-housing 8 flows out, there is not accumulation of heat behavior in the second thermal storage unit 5 and the 3rd thermal storage unit 7.
2. accumulation of heat second stage: pass into 11MPa, 560 DEG C of superheated steams in steam state heat transfer medium air inlet-outlet-housing 2, when the first thermal storage unit 3 heat storage capacities are when inadequate, enter the second thermal storage unit 5 through the first thermal storage unit 3 pipe sides, intermediate header 4, the solid-state fused salt heat absorption of the second 180 DEG C of thermal storage unit 5 shell-sides, temperature raises, 560 DEG C of superheated steam heat releases of the second thermal storage unit 5 pipe side simultaneously become a little more than flowing into intermediate header after the hot water of 180 DEG C, then flow out through the 3rd thermal storage unit 7 pipe sides, liquid heat transfer medium air inlet-outlet-housing 8.The first thermal storage unit 3 amount of stored heat reach the upper limit gradually, lose heat storage capacity; There is not accumulation of heat behavior in the 3rd thermal storage unit 7.
3. the accumulation of heat phase III: pass into 11MPa, 560 DEG C of superheated steams in steam state heat transfer medium air inlet-outlet-housing 2, enter the second thermal storage unit 5 through the first thermal storage unit 3 pipe sides, intermediate header intermediate header again, the second thermal storage unit 5 shell-side fused salt heat absorptions become the liquid fused salt a little less than 560 DEG C, when the second thermal storage unit 5 heat storage capacities are when enough, 560 DEG C of superheated steam heat releases of the second thermal storage unit 5 pipe side become a little more than flowing into intermediate header after the hot water of 180 DEG C, then flow out through the 3rd thermal storage unit 7 pipe sides, liquid heat transfer medium air inlet-outlet-housing 8.There is not accumulation of heat behavior in the first thermal storage unit 3 and the 3rd thermal storage unit 7.
4. accumulation of heat finishes: by 1.-order thermal storage unit accumulation of heat one by one 3., when the hot water flowing out through liquid heat transfer medium air inlet-outlet-housing 8 starts to be obviously greater than 180 DEG C, and hot water temperature is more and more higher, while finally reaching the moist steam of 250.4 DEG C, indicate that whole regenerative apparatus accumulation of heat is complete.
2, heat release:
1. the heat release first stage: regenerative apparatus heat release, in liquid heat transfer medium air inlet-outlet-housing 8, pass into 180 DEG C of hot water, the 3rd thermal storage unit 7 shell-sides become the solid-state fused salt a little more than 180 DEG C a little less than the liquid fused salt heat release of 560 DEG C, when the 3rd thermal storage unit 7 heat release abilities are when enough, the 3rd 180 DEG C of thermal storage unit 7 pipe sides hot water heat absorption becomes a little less than flowing into intermediate header after the superheated steam of 560 DEG C, again through the second thermal storage unit 5 pipe sides, intermediate header, the first thermal storage unit 2 pipe sides, steam state heat transfer medium air inlet-outlet-housing 2 flows out, there is not heat release behavior in the first thermal storage unit 3 and the second thermal storage unit 5.
2. heat release second stage: pass into 180 DEG C of hot water in liquid heat transfer medium air inlet-outlet-housing 8, when the 3rd thermal storage unit 7 heat release abilities are when inadequate, through the 3rd thermal storage unit 7 pipe sides, intermediate header enters the second thermal storage unit 5, the second thermal storage unit 5 shell-sides are a little less than the liquid fused salt heat release of 560 DEG C, temperature reduces, 180 DEG C of hot water heat absorptions of the second thermal storage unit 5 pipe side simultaneously become a little less than flowing into intermediate header after 560 DEG C of superheated steams, again through the first thermal storage unit 5 pipe sides, steam state heat transfer medium air inlet-outlet-housing 2 flows out, the 3rd thermal storage unit 7 thermal discharges reach the upper limit gradually, lose heat release ability, there is not heat release behavior in the first thermal storage unit 3.
3. the heat release phase III: pass into 180 DEG C of hot water in liquid heat transfer medium air inlet-outlet-housing 8, again through the 3rd thermal storage unit 7 pipe sides, intermediate header enters the second thermal storage unit 5, the second thermal storage unit 5 shell-side fused salt heat releases become a little more than 180 DEG C of solid-state fused salts, when the second thermal storage unit 5 heat release abilities are when enough, the second 180 DEG C of thermal storage unit 5 pipe sides hot water heat absorption becomes a little less than flowing into intermediate header after the superheated steam of 560 DEG C, again through the first thermal storage unit 5 pipe sides, steam state heat transfer medium air inlet-outlet-housing 2 flows out, there is not heat release behavior in the first thermal storage unit 3 and the 3rd thermal storage unit 7.
4. heat release finishes: by 1.-order thermal storage unit heat release one by one 3., when the steam flowing out through steam state heat transfer medium air inlet-outlet-housing 2 starts to be less than 560 DEG C, and vapor (steam) temperature is more and more lower, while finally reaching the moist steam of 212 DEG C, indicate that whole regenerative apparatus heat release is complete.
Embodiment 2: the Solar Energy Heat Utilization System of the regenerative apparatus of mentioning in a kind of embodiment of utilization 1, as shown in Figure 6.This device comprises recovery tank 25, recovery tank connects drum 27 by return circulating pump 26, drum delivery port connects aqueduct, aqueduct is back to drum by forced circulation pump 28 through solar energy evaporation heater 29 and forms vaporization cycle, drum venthole connects gas pipeline, gas pipeline is crossed hot heater 30 through solar energy and is connected to regenerative apparatus accumulation of heat import, and phase transition heat accumulation unit accumulation of heat outlet connects recovery tank; Phase transition heat accumulation unit accumulation of heat outlet is also connected with feed pipe 33 as heat release import, and phase transition heat accumulation unit accumulation of heat import is also connected with steam outlet pipe 34 as heat release outlet; Described phase transition heat accumulation unit accumulation of heat import and accumulation of heat exit are provided with the valve of switching accumulation of heat-heat release.System has regenerative apparatus A31 parallel with one another and regenerative apparatus B32.
Its running is as follows: water in drum 27 enters solar energy evaporation heater 29 through forced circulation pump 28, and the steam water interface of generation returns drum 27, and drum 27 goes out vapour and enters solar energy and cross hot heater 30.Along with the difference of intensity of illumination, regulate the power of forced circulation pump 28 to carry out adjust flux, circulating ratio is kept relative stability, and ensure the safe operation of solar energy evaporation heater 29.Regulate drum 27 quantity of steam according to the parameter request of the female pipe of regenerative apparatus steam inlet and intensity of illumination, make solar energy cross hot heater 30 and go out vapour parameter and reach requirement.Along with the variation of drum 27 liquid levels, pressure, regulate confluent and loop back the water yield simultaneously; System comprises regenerative apparatus A in parallel and regenerative apparatus B.Steam in drum is transported to regenerative apparatus A, forms condensate water to recovery tank 25 after heat release, and the specific works process of regenerative apparatus as described in example 1 above, complete when regenerative apparatus A heat accumulation, is switched to regenerative apparatus B and carries out heat accumulation, and vice versa.According to the quantity of circulating water of the situation control return circulating pump 26 of the liquid level of recovery tank 25, pressure and liquid level of steam drum, pressure to drum replenishment cycles water.
System is in service, can carry out as required heat utilization.Feedwater heats vapour and adopt DC heating, in the middle of without drum, feed pipe 33 will be transported to the complete regenerative apparatus of heat accumulation through the soft water of water treatment, completes evaporation, overheated overall process in regenerative apparatus, detailed process as described in Example 1.Steam outlet pipe 34 can acquiring demand parameter steam.
Each regenerative apparatus is switchover operation between accumulation of heat and these two states of heat release, the changeable heat release of another regenerative apparatus when a regenerative apparatus accumulation of heat.Simultaneously because regenerative apparatus has constant temperature heat release, therefore to complete not be the necessary condition of heat release in accumulation of heat, supposes that accumulation of heat only has 70%, still can carry out heat release.In the time that regenerative apparatus is less, can repeatedly switch to meet accumulation of heat, heat release requirement.
In the time of regenerative apparatus cold start-up, need preheating, warm is almost consistent with running, but does not adopt the Steam Heating in drum, but adopts the water in drum, and now, in order to ensure not produce steam in drum, forced circulation pump 28 needs enlargement discharge.But in the time of actual motion, because initial sun energy intensity is generally all not too large, therefore just in time meet the preheating requirement of regenerative apparatus.
Claims (9)
1. a phase transition heat accumulation unit, it is characterized in that: the thermal storage unit that comprises some series connection, described thermal storage unit comprises heat storage tank and the heat exchange base tube through heat storage tank, in heat storage tank, be equipped with can solid-liquid phase change heat storage medium, in heat exchange base tube, circulation has heat transfer medium, the import and export head and the tail series connection of the heat exchange base tube of adjacent described thermal storage unit.
2. a kind of phase transition heat accumulation unit according to claim 1, is characterized in that: described thermal storage unit has many parallel heat exchange base tubes, the heat exchange base tube of adjacent thermal storage unit import and export between by the intermediate header series connection of transferring.
3. a kind of phase transition heat accumulation unit according to claim 2, is characterized in that: the heat exchange base tube end of two ends thermal storage unit is connected with air inlet-outlet-housing.
4. according to a kind of phase transition heat accumulation unit described in claim 1 or 2 or 3, it is characterized in that: the top of heat storage tank tank wall is located in the import and export of described heat exchange base tube, the stage casing of heat exchange base tube is positioned at heat storage tank bottom and is provided with heat exchange fin outward at tube wall, between the import and export of heat exchange base tube and stage casing, transfers by bend pipe.
5. a kind of phase transition heat accumulation unit according to claim 4, is characterized in that: described heat exchange fin is set up at the bottom of heat storage tank case by load-bearing at the bottom of case, described heat storage tank tank wall upper limb offer downwards for heat exchange base tube import and export through U-lag.
6. according to a kind of phase transition heat accumulation unit described in claim 1 or 2 or 3, it is characterized in that: described phase transition heat accumulation unit has at least three thermal storage units of series connection mutually.
7. according to a kind of phase transition heat accumulation unit described in claim 1 or 2 or 3, it is characterized in that: between each thermal storage unit, adopt replaceable to connect.
8. according to a kind of phase transition heat accumulation unit described in claim 1 or 2 or 3, it is characterized in that: each thermal storage unit has heat insulation heat-insulation layer mutually.
9. the Solar Energy Heat Utilization System of phase transition heat accumulation unit described in application rights requirement 1 to 8 any one, it is characterized in that: comprise recovery tank, recovery tank connects drum by return circulating pump, drum delivery port connects solar energy evaporation heater and is back to drum formation vaporization cycle through forced circulation pump, drum venthole connection solar energy is crossed hot heater and is then connected to phase transition heat accumulation unit accumulation of heat import, phase transition heat accumulation unit accumulation of heat outlet connects recovery tank, and described phase transition heat accumulation unit is at least arranged in parallel two; Phase transition heat accumulation unit accumulation of heat outlet is also connected with feed pipe as heat release import, and phase transition heat accumulation unit accumulation of heat import is also connected with steam outlet pipe as heat release outlet; Described phase transition heat accumulation unit accumulation of heat import and accumulation of heat exit are provided with the valve of switching accumulation of heat-heat release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320281122.3U CN203672211U (en) | 2013-05-22 | 2013-05-22 | Phase change heat storage device and solar thermal utilization system utilizing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320281122.3U CN203672211U (en) | 2013-05-22 | 2013-05-22 | Phase change heat storage device and solar thermal utilization system utilizing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203672211U true CN203672211U (en) | 2014-06-25 |
Family
ID=50968497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320281122.3U Expired - Lifetime CN203672211U (en) | 2013-05-22 | 2013-05-22 | Phase change heat storage device and solar thermal utilization system utilizing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203672211U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014187317A1 (en) * | 2013-05-22 | 2014-11-27 | 杭州工电能源科技有限公司 | Phase change heat storage apparatus, solar heat utilization system using apparatus, and operating mode |
| CN104266523A (en) * | 2013-05-22 | 2015-01-07 | 上海工电能源科技有限公司 | Phase change heat storage device, solar heat utilization system employing same and operating mode of solar heat utilization system |
| CN109588015A (en) * | 2018-12-21 | 2019-04-05 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of distribution heat reservoir |
-
2013
- 2013-05-22 CN CN201320281122.3U patent/CN203672211U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014187317A1 (en) * | 2013-05-22 | 2014-11-27 | 杭州工电能源科技有限公司 | Phase change heat storage apparatus, solar heat utilization system using apparatus, and operating mode |
| CN104266523A (en) * | 2013-05-22 | 2015-01-07 | 上海工电能源科技有限公司 | Phase change heat storage device, solar heat utilization system employing same and operating mode of solar heat utilization system |
| CN104266523B (en) * | 2013-05-22 | 2017-09-29 | 上海工电能源科技有限公司 | A kind of phase transition heat accumulation unit, Solar Energy Heat Utilization System and the method for operation using the device |
| CN109588015A (en) * | 2018-12-21 | 2019-04-05 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of distribution heat reservoir |
| CN109588015B (en) * | 2018-12-21 | 2020-12-29 | 中国航空工业集团公司西安航空计算技术研究所 | Distributed heat storage system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104603570B (en) | Device for energy production | |
| CN103836703B (en) | Fused salt regenerative electrochemical heats central heating system | |
| CN102168848B (en) | High-temperature concrete heat reservoir capable of generating steam directly | |
| CN107514667A (en) | The central heating system of steam power plant's cross-season heat-storage heat release is realized using electric heat pump | |
| CN104266523B (en) | A kind of phase transition heat accumulation unit, Solar Energy Heat Utilization System and the method for operation using the device | |
| CN207830046U (en) | Solar parabolic through power generation system | |
| CN103712255B (en) | A kind of releasing across solar energy-phase-changing energy-storing classification in season can heating system and method | |
| CN111189041A (en) | Electric heat accumulating type superheated steam system and method thereof | |
| CN205535703U (en) | Pottery base member fused salt phase transition high temperature heat accumulation formula millet electricity utilizes steam generator | |
| CN102162636A (en) | High-temperature heat storage and evaporation integrated device | |
| CN105509019A (en) | Ceramic-matrix high-temperature fused-salt phase-change heat-storage type off-peak electricity utilizing and steam generating device | |
| CN109405611B (en) | Composite heat storage system with two-stage phase change heat storage device and steam storage tank | |
| CN203672211U (en) | Phase change heat storage device and solar thermal utilization system utilizing the same | |
| CN203731528U (en) | Steam heating system utilizing off-peak electricity as energy | |
| CN104321608A (en) | Method for exchanging heat between a salt melt and a further medium in a coiled heat-exchanger | |
| CN205878610U (en) | Heat pipe formula electrical heating phase change energy storage heat exchanger | |
| CN102401591A (en) | Vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system | |
| CN104896556A (en) | Steam heating system utilizing off-peak electricity as energy | |
| CN215112517U (en) | Combined cycle cogeneration system based on heat storage | |
| CN114719651B (en) | Steam heating fused salt heat storage and release system | |
| CN205332330U (en) | Double -phase heat accumulation formula electric boiler of solid -liquid | |
| CN208749415U (en) | Compound storage suitable for depth peaking generation takes hot systems | |
| CN200975781Y (en) | Indirect heating second tube pass heat exchange type energy accumulation heating apparatus | |
| CN206617917U (en) | A kind of trough-electricity heat storage boiler | |
| CN202420250U (en) | Medium-low temperature flue gas waste heat power generation system of sleeve-pipe type heat pipe organic medium evaporator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI GONGDIAN ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHENGZHOU GONGDIAN ENERGY TECHNOLOGY CO., LTD. Effective date: 20141117 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 311100 HANGZHOU, ZHEJIANG PROVINCE TO: 201203 PUDONG NEW AREA, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141117 Address after: Guo Ningjing road 201203 Shanghai Zhangjiang hi tech park, Pudong Software Park No. 498 block 14 22301-1143 Patentee after: SHANGHAI GD ENERGY TECHNOLOGY Co.,Ltd. Address before: Hangzhou City, Zhejiang province 311100 Chang Road Yuhang Economic Development Zone No. 121 Patentee before: HANGZHOU GONGDIAN ENERGY TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230105 Address after: No. 19, Gaoyou Road, Xuhui District, Shanghai 200031 Patentee after: Shanghai Alliance Investment Ltd. Address before: Block 22301-1143, building 14, Pudong Software Park, 498 guoningjing Road, Zhangjiang hi tech park, Shanghai, 201203 Patentee before: SHANGHAI GD ENERGY TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |