CN201043869Y - High-temperature thermocline mixed heat accumulation device in molten salt - Google Patents
High-temperature thermocline mixed heat accumulation device in molten salt Download PDFInfo
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- CN201043869Y CN201043869Y CNU2007200516345U CN200720051634U CN201043869Y CN 201043869 Y CN201043869 Y CN 201043869Y CN U2007200516345 U CNU2007200516345 U CN U2007200516345U CN 200720051634 U CN200720051634 U CN 200720051634U CN 201043869 Y CN201043869 Y CN 201043869Y
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Abstract
The utility model provides a mixing heat storage device of high temperature thermocline in molten salt. The device comprises an injection component of molten salt liquid, a discharge component and a multiaperture medium packing section. The injection component and the discharge component are high temperature shell and tube phase change heat exchangers or low temperature shell and tube phase change heat exchangers. The multiaperture medium packing section arranges a foam silicon carbide ceramic plate as a separation stratification component and a heat displaying and heat storage component of solid-state medium as well. The utility model uses phase change heat storage of high-low temperature shell and tube phase change heat exchangers, improving heat storage capacity significantly. Simultaneously, the foam silicon carbide ceramic plate as the stratification component instead of stainless steel net strengthens heat transfer performance of the heat storage system and can be used as multiaperture heat storage material. Therefore, the utility model has the advantages of simple and compact structure, convenient operation, low manufacturing cost, wide operating temperature range and ideal heat storage effect, etc.
Description
Technical field
The utility model relates to the solar energy heat absorbing energy storage and utilizes technology, high temperature mesolimnion mixed heat accumulation device in particularly a kind of fuse salt.
Background technology
The development and use of solar energy have become the important component part of current social energy strategy.The restriction solar energy development all multifactor in, the efficient that low temperature utilizes pattern to cause is on the low side to be the place of the more weak key of the solar generator market competitiveness, improve the temperature of solar thermal utilization, research and development solar heat power station is one of main path that utilizes on a large scale solar energy.High radiation density hot-fluid conversion in the solar heat power generation system, transport with store loop and mainly constitute, therefore strengthen heat energy device energy conversion efficiency and storage density becomes one of key technology of solar energy thermal-power-generating by heat dump, steam generator and storage heater etc.
Two jars of heat storage types of fuse salt have become the main pattern of heat storage technology in the solar heat power generation system at present, to cause unit price and operation expense to compare higher but make factors such as two heat-accumulator tanks, fuse salt use amount are big, high temperature is kept, and the space that reduces its power cost is very limited; Another more potential mode adopts single jar of accumulation of heat of mesolimnion exactly, replace two jars of hold over systems of more general fuse salt with single jar of hold over system of fuse salt mesolimnion, can reduce cost significantly, but the effective regenerative capacity of the unit volume of this system decreases, the injection of fusion saline solution and discharging structure, be diffuser with the liquid trap requirement than higher, to reduce turbulent flow as far as possible, on single jar, respectively there are independently diffuser and liquid trap in the lower end, form two flow processs, use for heat release and accumulation of heat duty respectively, the a plurality of radially-arranged pipe diffusers of the normal employing of diffuser, liquid trap is to adopt the collector tube that 3 to 5 interfaces are arranged, the structure more complicated, and the import and export effect can produce certain disturbance; Simultaneously in the porous media filler, need the configuration stainless (steel) wire as becoming layer elements about at a certain distance, make that mesolimnion axially is the one dimension laminar motion for single jar, ensure that a mesolimnion is kept better in the jar, but stainless (steel) wire is as becoming layer elements, its thermal conductivity is little, the effective regenerative capacity of unit volume is low, can not use as heat-storing material, does not have tangible accumulation of heat effect; And the porous media filler is required that good chemical stability is not only arranged, also good physical stability will be arranged, stop up various passages in order to avoid form chip.
In order to reduce the cost of electricity-generating of solar energy thermal-power-generating, improve the validity and a year utilization rate of generating, this just needs, and the effective regenerative capacity of a kind of unit is bigger, steady in a long-term, manufacturing cost becomes the originally lower middle high-temperature heat accumulation device of .. with operation maintenance.
The utility model content
The purpose of this utility model is to overcome the shortcoming that existing fuse salt hold over system exists, and (two jars of fuse salt system manufacturing costs and operation maintenance are higher relatively; Fuse salt mesolimnion list can system has two covers to inject and discharging structure, more complicated, installation difficulty is big and take a jar interior space, stainless (steel) wire is little as stratification equipment thermal conductivity, the effective regenerative capacity of unit volume is lower), a kind of requirement that can satisfy solar energy thermal-power-generating to heat storage technology of research and design can significantly reduce manufacturing cost again, high temperature mesolimnion mixed heat accumulation device in the fuse salt of the effective regenerative capacity of raising unit volume.
The purpose of this utility model is achieved through the following technical solutions: high temperature mesolimnion mixed heat accumulation device in a kind of fuse salt, comprise injection part, discharging parts, the porous media packing section of fusion saline solution, it is characterized in that: described injection part and discharging parts are high temperature shell-tube type phase-change heat-exchanger or low temperature shell-tube type phase-change heat-exchanger; Described porous media packing section is provided with the foam silicon carbon potsherd, and described foam silicon carbon potsherd is both as separating the stratification part, again as the sensible heat accumulation of heat assembly of solid state medium.
This device is single jar structure form, and physical dimensions such as tank diameter and height depend on regenerator temperature and regenerative capacity.Ellipse head all can be adopted in tank base and top, on the ellipse head of top safety valve is installed, and tank body can adopt flange to be connected with cover.High temperature shell-tube type phase-change heat-exchanger and low temperature shell-tube type phase-change heat-exchanger adopt the gap to install in tank body.The outer winding of described tank body followed heater strip, keep fuse salt during for startup and be in liquid state, heating porous media and tank body and balance heat waste etc., at tank body outermost parcel glass fibre thermal insulation layer, the thickness of thermal insulation layer selects to depend on regenerator temperature and requirement to heat waste.
The cylindrical outer casing of described high and low temperature shell-tube type phase-change heat-exchanger all adopts stainless steel material, stainless steel tube is adopted in tube bank, uniform in the enclosure, the two ends end cap adopts corrosion resistant plate, wherein be welded with on the end cap and fill the phase change heat storage material interface, fill the tube connector that the phase change heat storage material interface sides vacuumizes in addition.Just tube bank is different with the height dimension of profile in the primary structure difference of high and low temperature phase-change heat-exchanger.
Described high temperature shell-tube type phase-change heat-exchange organ pipe effluent is crossed the fusion saline solution, shell-side can high-temperature fusion salt phase transformation material.Select the high-temperature fusion salt phase transformation material of suitable fusing point according to the application scenario upper limit working temperature.This heat exchanger substitutes injection and the discharging structure of having simplified the fusion saline solution, and has increased regenerative capacity.
Described low temperature shell-tube type phase-change heat-exchange organ pipe effluent is crossed the fusion saline solution, shell-side can watery fusion salt phase transformation material.Select the watery fusion salt phase transformation material of suitable fusing point according to application scenario lower limit operating temperature.This heat exchanger also substitutes injection and the discharging structure of having simplified the fusion saline solution, and has increased regenerative capacity.
Described porous media packing section is mesolimnion sensible heat heat accumulating sections, and the foam silicon carbon potsherd evenly is set in the porous media packing section at regular intervals; Described interval can be 100～150mm.Described foam silicon carbon potsherd had both replaced stainless (steel) wire as becoming layer elements, can be used as heat storage again and used, and had tangible accumulation of heat effect.
Fill quartzite between the described foam silicon carbon potsherd and mix porous media, as the sensible heat heat-storing material of main solid porous medium with siliceous sand.
A kind ofly utilize high temperature mesolimnion mixed heat accumulation method in the fuse salt that said apparatus realizes, it is characterized in that comprising the steps:
(1) in device, forms mesolimnion: specifically be to import and export at the top of device when the high-temperature fusion saline solution to be drawn out of, after the heat exchange cooling, when importing and exporting access to plant by the bottom of device; Perhaps work as the watery fusion saline solution and be drawn out of, after heating, when importing and exporting access to plant, promptly in the middle of installing, have the natural layering that thermograde is very big, i.e. a mesolimnion by the top of installing in the import and export of the bottom of device.
(2) when exothermic process begins, be full of the high-temperature fusion saline solution in the device, this high-temperature fusion saline solution is imported and exported extraction through the high-temperature phase-change shell and tube exchanger from the top of device, bottom from device after the heat release is imported and exported in low temperature phase change shell and tube exchanger access to plant, just begun in heat release a period of time, it is motionless that mesolimnion keeps, after a period of time, mesolimnion moves on beginning to stablize, along with mesolimnion moves on constantly and during near the high-temperature phase-change shell and tube exchanger, in the short period of time, the temperature of the port of export drops to below the fusing point of high temperature phase change material (pcm) significantly, relies on the high-temperature phase-change heat exchange then, and holding temperature is constant in one long period, last phase-change heat-exchange finishes substantially, very short time section inner outlet end temperature significantly descend.
(3) when heat-accumulating process begins, be full of the watery fusion saline solution in the device, this watery fusion saline solution is imported and exported extraction through the low temperature phase change shell and tube exchanger from the bottom of device, import and export in the access to plant from the top of device after being heated into the high-temperature fusion saline solution, just begun in accumulation of heat a period of time, it is motionless that mesolimnion keeps, after after a while, mesolimnion begins stable moving down, when mesolimnion constantly moves down and during near the low temperature phase change shell and tube exchanger, in the short period of time, the temperature of the port of export is raised to more than the fusing point of low-temperature phase-change material significantly, relies on the low temperature phase change heat exchange then, and holding temperature is constant in one long period, last phase-change heat-exchange finishes substantially, very short time inner outlet end temperature significantly rise.
At described exothermic process and heat-accumulating process, the foam silicon carbon potsherd is set in mesolimnion sensible heat heat accumulating sections replaces stainless (steel) wire as becoming layer elements and assisting heat release or accumulation of heat.
Described foam silicon carbon potsherd evenly is provided with every a segment distance in mesolimnion sensible heat heat accumulating sections.
Action principle of the present utility model is: the related mesolimnion of the utility model is to utilize density and the temperature relation between cold and hot to form, it is a natural layering that thermograde is very big that in the middle of device, exists, its similar separation layer is the same, make the above fusion saline solution of mesolimnion keep high temperature, the following fusion saline solution of mesolimnion keeps low temperature, continuous extraction along with the fusion saline solution, mesolimnion can move up and down, the fusion saline solution of extracting out can keep relative constant temperature, when top that mesolimnion arrives jar or bottom, marked change can take place in the temperature of the fusion saline solution of extraction.In order to keep a jar interior mesolimnion, the injection and the discharging process of just necessary strict control saline solution, the one-tenth layer elements of the porous regenerator material of the reasonable porosity of filling and configuration optimum structure in jar.
The utility model has following advantage and beneficial effect compared with prior art:
(1) effective regenerative capacity of unit volume is big.Owing to adopted the phase-transition heat-storage in the high and low temperature shell-tube type phase-change heat-exchanger, improved regenerative capacity by a relatively large margin.
(2) simple in structure, compact, easy to use.Adopted high and low temperature shell-tube type phase-change heat-exchanger to serve as diffuser and liquid trap structure, ensured that the homogenising of fluid flows, compared with the single can system of original mesolimnion accumulation of heat, the injection of fusion saline solution is relative with discharging structure simple and practical; Adopt the foam silicon carbon potsherd to replace stainless (steel) wire as becoming layer elements, because the foam silicon carbon pottery is a three-dimensional communication pore network structure, have high thermal conductivity, good heat and chemical stability, excellent characteristics such as mechanical property, both strengthen the heat transfer property of hold over system, can be used as the porous regenerator material again.
(3) low cost of manufacture.Single jar of hold over system is compared with two jars of hold over systems, and manufacturing cost reduces.Adopt the low foam silicon carbon potsherd of production cost simultaneously, both can store sensible heat, also can reduce the fuse salt consumption.
(4) operating temperature range is wide.Select the fusing point of high and low temperature fuse salt phase-change material according to the operating temperature of practical application.And the interlude mesolimnion keeps stable mobile in heat release and heat-accumulating process energy in service, and the import and export temperature keeps the temperature difference of relative ideal, has accumulation of heat effect preferably.
Description of drawings
Fig. 1 is the structural representation of high temperature mesolimnion mixed heat accumulation device in the utility model fuse salt.
Fig. 2 is that the mesolimnion sensible heat heat accumulating sections foam silicon carbon potsherd in the device shown in Figure 1 is separated schematic diagram.
Fig. 3 is the structural representation of high and low temperature shell-tube type phase-change heat-exchanger in the device shown in Figure 1.
Fig. 4 is the accumulation of heat principle schematic of device shown in Figure 1.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
Concrete structure of the present utility model such as Fig. 1～shown in Figure 3, as seen from Figure 1, high temperature mesolimnion mixed heat accumulation device is single jar structure form in this fuse salt, physical dimensions such as the diameter of tank body 7 and height depend primarily on regenerator temperature and regenerative capacity.Ellipse head is all adopted at tank body 7 bottoms and top, and safety valve 9 is installed on the ellipse head of top, and tank body 7 adopts flange to be connected with cover 10; In tank body 7, adopt the gap to install and be provided with high temperature shell-tube type phase-change heat-exchanger 1 and low temperature shell-tube type phase-change heat-exchanger 3, described high temperature shell-tube type phase-change heat-exchanger 1 is arranged on tank body 7 tops, described low temperature shell-tube type phase-change heat-exchanger 3 is arranged on tank body 7 bottoms, described height, low temperature shell-tube type phase-change heat- exchanger 1,3 cylindrical outer casing all adopts stainless steel material, stainless steel tube is adopted in tube bank 11, uniform in the enclosure (see figure 3), the two ends end cap adopts corrosion resistant plate, wherein be welded with on the end cap and fill phase change heat storage material interface 12, fill the tube connector (not shown) that the phase change heat storage material interface sides vacuumizes in addition; Just tube bank is different with the height dimension of profile in the primary structure difference of high and low temperature phase-change heat-exchanger.The stage casing of described tank body is a mesolimnion sensible heat heat accumulating sections 2, be provided with foam silicon carbon potsherd 5 in this section, described foam silicon carbon potsherd 5 evenly is provided with by interval 100～150mm in mesolimnion sensible heat heat accumulating sections 2, between foam silicon carbon potsherd 5, fill quartzite and mix porous media with siliceous sand, as the sensible heat heat-storing material of main solid porous medium, specifically as shown in Figure 2.Described tank body 7 outer windings are followed heater strip, keep fuse salt during for startup and be in liquid state, heating porous media and tank body and balance heat waste etc., at tank body 7 outermosts parcels glass fibre thermal insulation layer, the thickness of thermal insulation layer selects to depend on regenerator temperature and requirement to heat waste.
Utilize high temperature mesolimnion mixed heat accumulation method in the utility model fuse salt that said apparatus realizes, comprise the steps (see figure 4):
(1) in device, forms mesolimnion: specifically be to import and export 8 when the high-temperature fusion saline solution at the top of device to be drawn out of, after the heat exchange cooling, when importing and exporting 4 accesss to plant by the bottom of device; Perhaps import and export 4 when the watery fusion saline solution in the bottom of device and be drawn out of, after heating, when importing and exporting 8 accesss to plant by the top of device, promptly have the natural layering that thermograde is very big in the middle of device, promptly mesolimnion 6.
(2) when exothermic process begins, be full of the high-temperature fusion saline solution in the device, (described high temperature shell-tube type phase-change heat-exchange organ pipe effluent is crossed the fusion saline solution, shell-side can high-temperature fusion salt phase transformation material through high-temperature phase-change shell and tube exchanger 1 with this high-temperature fusion saline solution; Select the high-temperature fusion salt phase transformation material of suitable fusing point according to the application scenario upper limit working temperature) import and export 8 extractions from the top of device, import and export from the bottom of device after the heat release 4 through low temperature phase change shell and tube exchanger 3 (described low temperature shell-tube type phase-change heat-exchange organ pipe effluent is crossed the fusion saline solution, shell-side can watery fusion salt phase transformation material; Select the watery fusion salt phase transformation material of suitable fusing point according to application scenario lower limit operating temperature) in the access to plant, just begun in heat release a period of time, mesolimnion 6 keeps motionless, after a period of time, mesolimnion 6 moves on beginning to stablize, along with mesolimnion 6 moves on constantly and during near high-temperature phase-change shell and tube exchanger 1, in the short period of time, the temperature of the port of export drops to below the fusing point of high temperature phase change material (pcm) significantly, rely on the high-temperature phase-change heat exchange then, holding temperature is constant (in this process in one long period, the foam silicon carbon potsherd balance that is provided with in mesolimnion sensible heat heat accumulating sections also ensures the one-dimension temperature distribution of the fusion saline solution of flowing through, and assist heat release), last phase-change heat-exchange finishes substantially, very short time section inner outlet end temperature significantly descend.
(3) when heat-accumulating process begins, be full of the watery fusion saline solution in the device, this watery fusion saline solution is imported and exported 4 through low temperature phase change shell and tube exchanger 3 from the bottom of device to be extracted out, import and export in 8 accesss to plant from the top of device after being heated into the high-temperature fusion saline solution, just begun in accumulation of heat a period of time, mesolimnion 6 keeps motionless, after after a while, mesolimnion 6 begins stable moving down, when mesolimnion 6 constantly moves down and during near low temperature phase change shell and tube exchanger 3, in the short period of time, the temperature of the port of export is raised to more than the fusing point of low-temperature phase-change material significantly, rely on the low temperature phase change heat exchange then, holding temperature constant (in this process, the foam silicon carbon potsherd balance that is provided with in mesolimnion sensible heat heat accumulating sections also ensures the one-dimension temperature distribution of fusion saline solution of flowing through, and carry out auxiliary regenerator) in one long period, last phase-change heat-exchange finishes substantially, very short time inner outlet end temperature significantly rise.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (7)
1. high temperature mesolimnion mixed heat accumulation device in the fuse salt, comprise injection part, discharging parts, the porous media packing section of fusion saline solution, it is characterized in that: described injection part and discharging parts are high temperature shell-tube type phase-change heat-exchanger or low temperature shell-tube type phase-change heat-exchanger; Described porous media packing section is provided with the foam silicon carbon potsherd.
2. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 1, it is characterized in that: described foam silicon carbon potsherd evenly is arranged on the porous media packing section at regular intervals, fills quartzite and mix porous media with siliceous sand between the foam silicon carbon potsherd.
3. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 2 is characterized in that: the described 100～150mm that is spaced apart.
4. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 1 is characterized in that: be single jar structure form, high temperature shell-tube type phase-change heat-exchanger and low temperature shell-tube type phase-change heat-exchanger adopt the gap to be installed in the tank body.
5. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 4 is characterized in that: the outer winding of described tank body followed heater strip, at tank body outermost parcel glass fibre thermal insulation layer.
6. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 4 is characterized in that: described high temperature shell-tube type phase-change heat-exchanger and low temperature shell-tube type phase-change heat-exchanger be uniform stainless steel tube bank in its housing.
7. high temperature mesolimnion mixed heat accumulation device in the fuse salt according to claim 4, it is characterized in that: described high temperature shell-tube type phase-change heat-exchanger and low temperature shell-tube type phase-change heat-exchanger two ends end cap adopt corrosion resistant plate, wherein be welded with on the end cap and fill the phase change heat storage material interface, fill the phase change heat storage material interface sides and also be provided with the tube connector that vacuumizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200516345U CN201043869Y (en) | 2007-05-18 | 2007-05-18 | High-temperature thermocline mixed heat accumulation device in molten salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200516345U CN201043869Y (en) | 2007-05-18 | 2007-05-18 | High-temperature thermocline mixed heat accumulation device in molten salt |
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| CN201043869Y true CN201043869Y (en) | 2008-04-02 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135270A (en) * | 2011-03-01 | 2011-07-27 | 中国科学院电工研究所 | Heat accumulation and evaporation integrated device for solar thermal power generation |
| CN106288903A (en) * | 2016-07-28 | 2017-01-04 | 中国科学院电工研究所 | A kind of mesolimnion heat-storing device for liquid heat accumulation |
| CN106352312A (en) * | 2016-08-24 | 2017-01-25 | 中山大学 | Fused salt thermocline heat storage and steam generation integrated device and method |
| CN108413795A (en) * | 2018-02-05 | 2018-08-17 | 晖保智能科技（上海）有限公司 | A kind of high/low temperature fuse salt list tank heat-storing device |
| CN109899518A (en) * | 2019-04-10 | 2019-06-18 | 青岛达能环保设备股份有限公司 | Large-scale flat pressure-bearing heat-accumulator tank |
-
2007
- 2007-05-18 CN CNU2007200516345U patent/CN201043869Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135270A (en) * | 2011-03-01 | 2011-07-27 | 中国科学院电工研究所 | Heat accumulation and evaporation integrated device for solar thermal power generation |
| CN106288903A (en) * | 2016-07-28 | 2017-01-04 | 中国科学院电工研究所 | A kind of mesolimnion heat-storing device for liquid heat accumulation |
| CN106352312A (en) * | 2016-08-24 | 2017-01-25 | 中山大学 | Fused salt thermocline heat storage and steam generation integrated device and method |
| CN108413795A (en) * | 2018-02-05 | 2018-08-17 | 晖保智能科技（上海）有限公司 | A kind of high/low temperature fuse salt list tank heat-storing device |
| CN109899518A (en) * | 2019-04-10 | 2019-06-18 | 青岛达能环保设备股份有限公司 | Large-scale flat pressure-bearing heat-accumulator tank |
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