CN103256729B - Large Copacity combined solar chemistry step high effective heat-storage device and application - Google Patents
Large Copacity combined solar chemistry step high effective heat-storage device and application Download PDFInfo
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Abstract
The present invention relates to Large Copacity combined solar chemistry step high effective heat-storage device and application, comprise solar thermal collector, solid-chemistry reactor, cold-producing medium reservoir and cooling tower, Gu be filled with three kinds of heat accumulation salt adsorbents in-chemistry reactor, under identical operating pressure, three kinds of heat accumulation salt adsorbents successively decrease, in terraced distribution from high to low successively along the flow direction desorb equilibrium temperature of heat exchanging fluid.The present invention utilizes heat chemistry to adsorb heat accumulation and the lower deficiency causing reactant that heat accumulation decomposition reaction cannot occur of solar thermal energy temperature adopting the reacting salt of multiple different warm area effectively can overcome existing solar heat chemical heat storage apparatus to gather due to some moment, thus this solar heat chemistry step high effective heat-storage new technology can reduce the impact of solar energy period fluctuation, so can mate with solar thermal energy better, it can be combined by the step of different warm area heat accumulation reacting salt, and the High Efficiency Thermal realizing solar thermal energy stores.
Description
Technical field
The present invention relates to the device in solar energy storing technology field, especially relate to a kind of Large Copacity combined solar chemistry step high effective heat-storage device and application.
Background technology
Solar energy is that a kind of tool grows a lot the regenerative resource of potentiality, develops one of the important selection that solar energy is reply energy shortage, climate change and energy-saving and emission-reduction.As everyone knows, solar energy has intermittence, dispersiveness and instable feature, and therefore, implementing high effective heat-storage technology is the necessary means solving its intermittence, unstability and heat supply and demand time difference contradiction.In the utilization of solar energy, closest to practical stage is solar energy heating utilization, although have developed multiple thermal energy storage device and method at present, all not ideal enough, embody rule also has certain difficulty.
Thermal energy storage comprises again sensible heat storage, latent heat of phase change stores and chemical heat storing technology three kinds.Wherein chemical heat stores and not only has the high advantage of storage density, and by catalyst or by modes such as product separations, can realize the long term storage of heat energy.Chemisorbed thermmal storage utilizes heat energy and the mutual conversion of absorption potential energy in solid-gas reversible chemical reaction process to realize the technology of thermal energy storage.The scope of the available external heat source of chemisorbed thermmal storage and output temperature thereof is all very wide.Because this technology carrys out the different temperature requirements of satisfied extraneous heat user can adopt low grade heat energy by selecting different adsorption reaction salt, if solar energy is as driving force, it is therefore the very potential a kind of mode of tool during chemical heat stores.
Through the literature search to prior art, application number is " solar energy heat-storage heat supply evaluation and exploration technology " Chinese invention patent of CN201110260608.4, by solar thermal energy by fused salt and medium storage in heat insulation tank or cool-bag, then heat exchange is carried out with water and medium, after being transformed into the suitable temperature utilized, the past place of specifying of conveying, to realize the utilization of solar thermal energy.The method belongs to sensible heat and stores or latent heat of phase change storing mode, and its shortcoming is that storage density is relatively low, between the storage life, thermal loss is large.Application number is the Chinese invention patent of " the solar cross-season soil underground pipe heat accumulating and heating device " of CN200920308278.X, adopts sensible heat storing mode, there is the shortcoming that storage density is low, between the storage life, thermal loss is large equally.The solar heat in summer is carried out across storing season rear for winter heating by this patent, has abolished the restriction of solar thermal utilization seasonal effect, but has not considered solar energy time fluctuation characteristic by day.Even if solar energy is also period change on sunny daytime, also do not possess the characteristic of quantitative continuous supply, there is the difference of irradiation intensity and the temperature fluctuation that brings yet.Middle solar irradiation has on the same day has by force weak, heat energy that some moment collects will occur and be not enough to heating reactant to specific temperature and cause the situation that the decomposition reaction of heat accumulation cannot be carried out, heat accumulation efficiency must be caused so greatly to reduce.
Summary of the invention
Object of the present invention is exactly provide a kind of Coupling Thermal chemisorbed heat-storage technology, plural serial stage tandem type step thermmal storage technology in the Large Copacity combined solar chemistry step high effective heat-storage device and application of one to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Large Copacity combined solar chemistry step high effective heat-storage device, comprises solar thermal collector, solid-chemistry reactor, cold-producing medium reservoir and cooling tower,
Described consolidates-chemistry reactor, cold-producing medium reservoir merging connection,
Described solar thermal collector connects solid-chemistry reactor through circulating line and by circulating line, heat energy is transported to heat user terminal,
Described cooling tower is connected with cold-producing medium reservoir through circulating line,
Described solid-chemistry reactor in be filled with three kinds of heat accumulation salt adsorbents, under identical operating pressure, the equilibrium temperature of high temp. salt adsorbent is higher than the equilibrium temperature of middle thermohaline adsorbent, the equilibrium temperature of middle thermohaline adsorbent is higher than the equilibrium temperature of low thermohaline adsorbent, at the same pressure, three kinds of heat accumulation salt adsorbents successively decrease, in terraced distribution from high to low successively along the flow direction desorb equilibrium temperature of heat exchanging fluid.
Described high temp. salt adsorbent can be chlorate, Bromide, iodized salt, hydride, oxide and composite thereof, typical in nickel iodide (NiI
2), nickelous bromide (NiBr
2), nickel chloride (NiCl
2) magnesium bromide (MgBr
2), ferrous bromide (FeBr
2), frerrous chloride (FeCl
2), magnesium chloride (MgCl
2), manganous bromide (MnBr
2), manganese chloride (MnCl
2) etc.
Described middle thermohaline adsorbent can be chlorate, Bromide, iodized salt, hydride, oxide and composite thereof, typical in magnesium bromide (MgBr
2), ferrous bromide (FeBr
2), frerrous chloride (FeCl
2), magnesium chloride (MgCl
2), manganous bromide (MnBr
2), manganese chloride (MnCl
2), strontium bromide (SrBr
2), strontium chloride (SrCl
2), calcium chloride (CaCl
2) etc.
Described low thermohaline adsorbent can be chlorate, Bromide, iodized salt, hydride, oxide and composite thereof, typical in magnesium chloride (MgCl
2), manganous bromide (MnBr
2), manganese chloride (MnCl
2), strontium bromide (SrBr
2), strontium chloride (SrCl
2), calcium chloride (CaCl
2), barium bromide (BaBr
2), barium chloride (BaCl
2), sodium bromide (NaBr), lithium chloride (LiCl) etc.
For choosing of high temp. salt adsorbent, middle thermohaline adsorbent and low thermohaline adsorbent, be described further, different according to handled temperature, above-mentioned adsorbent can change use, such as, when the temperature processed is lower, original middle thermohaline adsorbent can be placed in pyroreaction section as high temp. salt adsorbent, original low thermohaline adsorbent can be placed in warm conversion zone and low-temp reaction section uses, therefore, the constituent part in the high temp. salt adsorbent of use, middle thermohaline adsorbent and low thermohaline adsorbent has repetition.
Whole reactor is divided into three sections by the adsorption reaction agent of three kinds of differential responses warm areas, in same reactor, namely achieve the division of different warm area.Three kinds of adsorption reaction salt are referred to as high temp. salt adsorbent, middle thermohaline adsorbent and low thermohaline adsorbent.Under identical operating pressure, the equilibrium temperature of high temp. salt adsorbent is higher than the equilibrium temperature of middle thermohaline adsorbent, and the equilibrium temperature of middle thermohaline adsorbent is higher than the equilibrium temperature of low thermohaline adsorbent.Because the pressure in same reactor is equal, so the risk that same container pressure-bearing inequality is brought can be avoided, thus the service life of reactor can be increased everywhere.
Described solid-chemistry reactor in be provided with dividing plate, through high temperature section, middle-temperature section and low-temperature zone that baffle for separating goes out, in each temperature section, fill corresponding heat accumulation salt adsorbent and tandem compound.
All arrange reactor heat-exchanging tube bundle in each temperature section, this tube bank is interconnected and is communicated with the circulating line being connected solid-chemistry reactor, described circulating line is arranged heating transfer valve, heat cycles pump, control and regulation valve, heat supply control valve.
Described solar thermal collector, circulating line, solid-chemistry reactor and reactor heat-exchanging tube bundle form the flowloop of solar heat storage stage solar thermal collector side heat-transfer fluid.
Fill cold-producing medium in described cold-producing medium reservoir and be provided with reservoir heat exchange coil, this coil pipe is communicated with the circulating line being connected cold-producing medium reservoir, described circulating line is arranged circulating pump, control and regulation valve.
Described cooling tower, circulating line, cold-producing medium reservoir and reservoir heat exchange coil form the flowloop of cooling tower side heat-transfer fluid.
Described solid-be provided with bi-directional conversion valve between chemistry reactor and cold-producing medium reservoir.
This device has solar energy storage stage and heat energy release stage when using:
Solar energy storage stage utilizes solar thermal collector to collect solar radiation heat, the solar thermal energy that obtains is utilized to provide heat of desorption for the heat accumulation salt adsorbent of filling in solid-chemistry reactor, heat accumulation salt adsorbent reacts with cold-producing medium generation chemical breakdown under the heat effect of solar thermal energy, now system working pressure is the condensing pressure under environment temperature, the refrigerant vapour separating sucking-off enters in cold-producing medium reservoir and condenses, the condensation heat of release is transported to cooling tower by the heat-transfer fluid in reservoir heat exchange coil through circulating pump and enters environment, realize solar thermal energy to the transformation of energy of chemisorbed gesture and storage,
Evaporative phase-change absorption heat is there is in the heat energy release stage under utilizing the suction-operated of the heat accumulation salt adsorbent in solid-chemistry reactor of the cold-producing medium in cold-producing medium reservoir, cold-producing medium reservoir is used as evaporimeter, the evaporation latent heat consumed is provided by external environment medium by cooling tower, Gu the operating pressure of-chemistry reactor and cold-producing medium reservoir is the evaporating pressure under environment temperature, refrigerant vapour enters in solid-chemistry reactor and discharges a large amount of heats of adsorption with chemisorbed heat accumulating generation chemosynthesis reaction, this heat of adsorption is utilized to realize the heat supply of heat user terminal.
Workflow of the present invention was made up of two stages:
First stage, solar thermal energy storage stage, the heat utilizing solar thermal collector to obtain provides heat of desorption for the chemisorbed heat accumulating of filling in solid-chemistry reactor, make it that chemical breakdown reaction occur to realize solar thermal energy and store to the transformation of energy of chemisorbed gesture, the refrigerant vapour separating sucking-off enters in cold-producing medium reservoir and condenses into liquid and store in the inner, and the heat of condensation of release is then taken away by cooling tower.This stage utilizes the solid-heat of desorption of chemistry decomposition reaction stage consumption to realize solar thermal energy and store to the transformation of energy of chemisorbed gesture.
Second stage, the heat releasable heat supply stage, heat generation evaporative phase-change is absorbed at ambient temperature from environment, the refrigerant vapour produced flows in solid-chemistry reactor and chemisorbed heat accumulating generation chemosynthesis reaction, discharge a large amount of heats of adsorption simultaneously and with this heat user heat supply to external world, meet the demand of extraneous heat user to heat by chemisorbed potential energy thermotropism transformation of energy release.
Compared with prior art, the present invention has following outstanding advantage and significant effect:
The first, heat storage density is high, between the storage life, thermal loss is little, and memory capacity is large
Store and latent heat of phase change heat-storing device relative to traditional solar energy sensible heat, method in the present invention belongs to chemical heat storing mode, and utilize solar thermal energy to realize the thermmal storage of solar energy to the transformation of energy of chemisorbed gesture, its heat storage density is high, thus can equipment volume be reduced, reduce heat accumulation cost; Traditional solar energy sensible heat stores and latent heat of phase change storage device and external environment have the larger temperature difference, thus in the storage process of heat, there is a large amount of radiation losses, and the present invention adopts heat chemistry to adsorb heat-storage technology, due to easily product separation can be realized, so can long term storage analyte at normal temperatures.As long as by cold-producing medium and chemisorbed heat accumulating isolated, the synthetic chemistry reaction of heat release would not occur, heat will by long-term efficient storage, almost do not have the radiation loss of environment to external world, this characteristic not only can realize the long-term investment efficiently storing but also decrease insulation aspect of heat energy; The feature that volume is little so device of the present invention has, heat storage capacity is large;
The second, multistage combined step thermmal storage can be realized
In solar heat storage stage, after entering solid-chemistry reactor from the heat transport fluid of solar thermal collector outflow, flow through high temperature section successively, middle-temperature section and low-temperature zone heat step by step to senior middle school's low temperature chemisorbed heat accumulating respectively, the chemisorbed heat accumulating that required desorption temperature is higher is also in heat transport fluid temperature higher position just, along with the transmission of heat, reduce gradually along the temperature flowing to heat transport fluid, the chemisorbed heat accumulating that required desorption temperature is lower is also positioned at heat transport fluid temperature lower, thus meet the principle of heat cascade utilization, so multistage combined step thermmal storage can be realized,
3rd, reactor is divided into different warm area and pressure is equal, thus avoids pressure-bearing inequality
Owing to adopting three kinds and above heat accumulation reacting salt, under identical operating pressure, the equilibrium temperature of high temp. salt adsorbent is higher than the equilibrium temperature of middle thermohaline adsorbent, and the equilibrium temperature of middle thermohaline adsorbent is higher than the equilibrium temperature of low thermohaline adsorbent.By the absorption heat accumulation reacting salt of different warm area, solid-chemistry reactor is divided into multiple warm area, again due to be in same solid-chemistry reactor in, so the pressure in whole reactor keeps uniformity, so the risk that same container pressure-bearing inequality is brought can be avoided, thus the service life of reactor can be increased;
4th, the fluctuation of solar energy heating temperature can be adapted to preferably
Relatively existing solar heat chemisorbed heat-storing device, the present invention adopt different desorption temperature divide the multiple reacting salt of warm area be filled in same solid-chemistry reactor in, due under identical operating pressure, the equilibrium temperature of high-temperature region reacting salt is higher than the equilibrium temperature of low-temperature space reacting salt, even if run on the same day in solar irradiation relatively weak time, also have the decomposition reaction of the reacting salt generation desorb of different warm area, thermal energy storage process also can not be stagnated and stop.The present invention adopts the reacting salt of multiple different warm area effectively can overcome existing solar heat chemisorbed heat-storing device to cause because solar thermal energy that some moment collects is not enough to heating reacting salt to specified temp the deficiency that the decomposition reaction of heat accumulation cannot be carried out, this solar heat chemisorbed heat-storing device and method is made to be subject to the impact of solar energy fluctuation less, so can mate with solar energy better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
The structure of Large Copacity combined solar chemistry step high effective heat-storage device as shown in Figure 1, comprise: solar thermal collector 1, heating transfer valve 2, heating | heat circulation pump 3, heating transfer valve 4, control and regulation valve 5, heat supply control valve 6, heat supply control valve 7, control and regulation valve 8, Gu-chemistry reactor 9, Gu the chemisorbed heat accumulating 10 of filling in-chemistry reactor 9, reactor heat-exchanging tube bundle 11, dividing plate 12, dividing plate 13, cold-producing medium reservoir (condenser/evaporator) 14, charging refrigerant 15 in cold-producing medium reservoir 14, reservoir heat exchange coil 16, bi-directional conversion valve 17, cooling tower 18, circulating pump 19, control and regulation valve 20, control and regulation valve 21, heat user 22.
At solar thermal energy storage stage, the mobility status of the connected mode of pipeline and the interior medium of pipe is as follows:
The connected mode of solar thermal collector side heat-transfer fluid pipeline is: solar thermal collector 1 exports and heats transfer valve 2 import and be connected, heating transfer valve 2 exports and is connected with heat cycles pump 3 import, heat cycles pump 3 exports and controls to adjust valve 5 import and be connected, control and regulation valve 5 exports and is connected with reactor heat-exchanging tube bundle 11 import, reactor heat-exchanging tube bundle 11 exports and controls to adjust valve 8 import and be connected, control and regulation valve 8 exports and heats transfer valve 4 import and be connected, heats transfer valve 4 and exports and be connected with solar thermal collector 1 import.Connection between reactor and reservoir: Gu-be connected by bi-directional conversion valve 17 between chemistry reactor 9 with cold-producing medium reservoir 14, Gu-chemistry reactor 9 is connected with one end of bi-directional conversion valve 17, the other end of bi-directional conversion valve 17 is then connected with cold-producing medium reservoir 14.The connected mode of cooling tower lateral line is: cooling tower 18 outlet is connected with coolant circulation pump 19 import, circulating pump 19 exports and controls to adjust valve 20 import and be connected, the outlet of control and regulation valve 20 is connected with reservoir heat exchange coil 16 import, reservoir heat exchange coil 16 exports and controls to adjust valve 21 import and be connected, the outlet of control and regulation valve 21 is connected with cooling tower 18 import, thus forms the heat exchanging fluid closed circuit between cooling tower 18 and cold-producing medium reservoir 14.Cold-producing medium 15 flows into cold-producing medium reservoir 14 from solid-chemistry reactor 9, in reservoir heat exchange coil 16 heat exchanging fluid cooling effect under be condensed into liquid state and be stored in reservoir.
Described device is at solar thermal energy storage stage, after heat exchanging fluid in solar thermal collector 1 absorbs solar radiation heat, temperature raises, and is transmitted by heat under the driving of heat cycles pump 3 via reactor heat-exchanging tube bundle 11 by solar thermal collector 1 to solid-chemistry reactor 9.Gu the chemisorbed heat accumulating 10 of filling in-chemistry reactor 9 issues raw decomposition reaction at the heat effect in the external world and releases gaseous refrigerant inflow cold-producing medium reservoir 14, be condensed into liquid state under the cooling effect of gaseous refrigerant heat exchanging fluid in reservoir heat exchange coil 16 and be stored in cold-producing medium reservoir 14.
In described device, Gu fill the chemisorbed heat accumulating of three kinds and above (minimum two kinds) in-chemistry reactor 9, and the desorption temperature of flow direction adsorption reaction salt along heat exchanging fluid under uniform pressure successively decreases, successively in terraced distribution.
In the heat releasable heat supply stage, the mobility status of the connected mode of pipeline and the interior medium of pipe is as follows:
The connected mode of cooling tower lateral line is: cooling tower 18 outlet is connected with circulating pump 19 import, circulating pump 19 exports and controls to adjust valve 20 import and be connected, the outlet of control and regulation valve 20 is connected with reservoir heat exchange coil 16 import, reservoir heat exchange coil 16 exports and controls to adjust valve 21 import and be connected, the outlet of control and regulation valve 21 is connected with cooling tower 18 import, thus forms the heat exchanging fluid closed circuit between cooling tower 18 and cold-producing medium reservoir 14.Connection between reservoir and reactor: be connected by bi-directional conversion valve 17 between cold-producing medium reservoir 14 with solid-chemistry reactor 9, cold-producing medium reservoir 14 is connected with one end of bi-directional conversion valve 17, and the other end of bi-directional conversion valve 17 is then connected with solid-chemistry reactor 9.The connected mode of heat user side heat-transfer fluid pipeline is: reactor heat-exchanging tube bundle 11 exports and controls to adjust valve 8 import and be connected, control and regulation valve 8 exports and is connected with heat supply control valve 7 import, heat supply control valve 7 exports and is connected with the import of heat user 22, the outlet of heat user 22 is connected with heat supply control valve 6 import, heat supply control valve 6 exports and is connected with heat circulation pump 3 import, heat circulation pump 3 exports and controls to adjust valve 5 import and be connected, and control and regulation valve 5 exports and is connected with reactor heat-exchanging tube bundle 11 import.
Described device is in the heat releasable heat supply stage, cold-producing medium 15 in cold-producing medium reservoir 14 absorbs heat from external environment, there is evaporation to enter via bi-directional conversion valve 17 in solid-chemistry reactor 9 and with chemisorbed heat accumulating 10 wherein, the synthetic reaction of heat release to occur, release a large amount of heats of adsorption via the heat exchanging fluid of reactor heat-exchanging tube bundle 11 and under the driving effect of heat circulation pump 3 by entrained heat by solid-chemistry reactor 9 thermotropism user side 22 transmits, and is the heat supply that heat energy realizes heat user to external world by chemisorbed potential energy.
In described device, solid-chemistry reactor and cold-producing medium reservoir can be integrated, and also can separate arranging separately, even can be equipped with corresponding cold-producing medium reservoir respectively for each different warm area.
During the present embodiment work, specific implementation process is:
When carrying out the storage of solar thermal energy: close heat supply control valve 6 and heat supply control valve 7, open heating transfer valve 2, heating transfer valve 4, control and regulation valve 5, control and regulation valve 8, control and regulation valve 20 and control and regulation valve 21.Heat up after heat-transfer fluid in this stage solar thermal collector 1 absorbs solar radiation heat and become high temperature heat transfer fluid, under the driving of heat cycles pump 3, carry heat is passed to solid-chemistry reactor 9 in chemisorbed heat accumulating 10 by reactor heat-exchanging tube bundle 11 via heating transfer valve 2, chemisorbed heat accumulating 10 issues biochemical decomposition reaction desorb at the heat effect of the solar thermal energy gathered from the external world and goes out gaseous refrigerant, and the gaseous refrigerant discharged flows into cold-producing medium reservoir 14 via bi-directional conversion valve 17.Gaseous refrigerant condenses into liquid state under the cooling effect of extraneous low-temperature receiver, and is stored in cold-producing medium reservoir 14.The heat of condensation of release is entered in extraneous surrounding medium (air, water) via the heat exchanging fluid from cooling tower 18 by reservoir heat exchange coil 16.Along with the continuous heating of solar thermal energy, the continuous supply of heat, desorption process deepens constantly until the chemical breakdown reaction of chemisorbed heat accumulating 10 in solid-chemistry reactor 9 is carried out completely, then close each switch valve in heating fluid return path: heating transfer valve 2, heating transfer valve 4, control and regulation valve 5, control and regulation valve 8, and close each connection valve of cooling tower lateral line: control and regulation valve 20 and control and regulation valve 21.By above-mentioned heat absorption solid-aerothermochemistry decomposition reaction, complete solar energy to the transformation of energy of chemisorbed gesture, be achieved so the High Efficiency Thermal of solar energy stores.
When the release carrying out heat energy gives external heat supply: close heating transfer valve 2 and heating transfer valve 4, open control and regulation valve 5, heat supply control valve 6, heat supply control valve 7, control and regulation valve 8, control and regulation valve 20 and control and regulation valve 21.Evaporative phase-change is there is under the suction-operated of the chemisorbed heat accumulating 10 in solid-chemistry reactor 9 of the cold-producing medium 15 in cold-producing medium reservoir 14, the evaporation latent heat consumed in evaporative phase-change process by reservoir heat exchange coil 16 by the surrounding medium (water from cooling tower 18, air) provided, the refrigerant vapour of evaporation enters solid-chemistry reactor 9 via bi-directional conversion valve 17 and with the chemisorbed heat accumulating 10 in it, chemosynthesis reaction occurs and discharges a large amount of heats of adsorption, under the driving of heat circulation pump 3, flow into heat user end 22 meet heat demand.Along with said process continue carry out, until the chemisorbed heat accumulating 10 in solid-chemistry reactor 9 completes chemosynthesis reaction, then close each switch valve in heat donor fluid loop: control and regulation valve 5, heat supply control valve 6, heat supply control valve 7, control and regulation valve 8, and close each connection valve of cooling tower lateral line: control and regulation valve 20 and control and regulation valve 21.By above-mentioned solid-chemistry synthetic reaction process in the transformation of energy of chemisorbed potential energy thermotropism realize the release of store heat and give external heat supply.
Claims (9)
1. Large Copacity combined solar chemistry step high effective heat-storage device, comprises solar thermal collector, solid-chemistry reactor, cold-producing medium reservoir and cooling tower,
Described consolidates-chemistry reactor, cold-producing medium reservoir merging connection,
Described solar thermal collector connects solid-chemistry reactor through circulating line and by circulating line, heat energy is transported to heat user terminal,
Described cooling tower is connected with cold-producing medium reservoir through circulating line,
It is characterized in that, described solid-chemistry reactor in be filled with three kinds of heat accumulation salt adsorbents, under identical operating pressure, the equilibrium temperature of high temp. salt adsorbent is higher than the equilibrium temperature of middle thermohaline adsorbent, the equilibrium temperature of middle thermohaline adsorbent is higher than the equilibrium temperature of low thermohaline adsorbent, at the same pressure, three kinds of heat accumulation salt adsorbents successively decrease, in terraced distribution from high to low successively along the flow direction equilibrium temperature of heat exchanging fluid.
2. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 1, is characterized in that,
Described high temp. salt adsorbent is chlorate, Bromide, iodized salt, hydride, oxide or its composite, is selected from nickel iodide (NiI
2), nickelous bromide (NiBr
2), nickel chloride (NiCl
2) magnesium bromide (MgBr
2), ferrous bromide (FeBr
2), frerrous chloride (FeCl
2), magnesium chloride (MgCl
2), manganous bromide (MnBr
2) or manganese chloride (MnCl
2);
Described middle thermohaline adsorbent is chlorate, Bromide, iodized salt, hydride, oxide or its composite, is selected from magnesium bromide (MgBr
2), ferrous bromide (FeBr
2), frerrous chloride (FeCl
2), magnesium chloride (MgCl
2), manganous bromide (MnBr
2), manganese chloride (MnCl
2), strontium bromide (SrBr
2), strontium chloride (SrCl
2) or calcium chloride (CaCl
2);
Described low thermohaline adsorbent is chlorate, Bromide, iodized salt, hydride, oxide or its composite, is selected from magnesium chloride (MgCl
2), manganous bromide (MnBr
2), manganese chloride (MnCl
2), strontium bromide (SrBr
2), strontium chloride (SrCl
2), calcium chloride (CaCl
2), barium bromide (BaBr
2), barium chloride (BaCl
2), sodium bromide (NaBr) or lithium chloride (LiCl).
3. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 1, it is characterized in that, described solid-chemistry reactor in be provided with dividing plate, through high temperature section, middle-temperature section and low-temperature zone that baffle for separating goes out, in each temperature section, fill corresponding heat accumulation salt adsorbent and tandem compound.
4. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 3, it is characterized in that, in each temperature section, reactor heat-exchanging tube bundle is all set, this tube bank is interconnected and is communicated with the circulating line being connected solid-chemistry reactor, described circulating line is arranged heating transfer valve, heat cycles pump, control and regulation valve, heat supply control valve.
5. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 4, it is characterized in that, described solar thermal collector, circulating line, solid-chemistry reactor form the flowloop of solar heat storage stage solar thermal collector side heat-transfer fluid.
6. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 1, it is characterized in that, fill cold-producing medium in described cold-producing medium reservoir and be provided with reservoir heat exchange coil, this coil pipe is communicated with the circulating line being connected cold-producing medium reservoir, described circulating line is arranged circulating pump, control and regulation valve.
7. Large Copacity combined solar chemistry step high effective heat-storage device according to claim 6, it is characterized in that, described cooling tower, circulating line, cold-producing medium reservoir form the flowloop of cooling tower side heat-transfer fluid.
8. Large Copacity combined solar according to claim 1 chemistry step high effective heat-storage device, is characterized in that, described solid-be provided with bi-directional conversion valve between chemistry reactor and cold-producing medium reservoir.
9. the application of the Large Copacity combined solar chemistry step high effective heat-storage device according to any one of claim 1-8, is characterized in that having solar energy storage stage and heat energy release stage when this device uses,
Solar energy storage stage utilizes solar thermal collector to collect solar radiation heat, the solar thermal energy that obtains is utilized to provide heat of desorption for the heat accumulation salt adsorbent of filling in solid-chemistry reactor, heat accumulation salt adsorbent reacts with cold-producing medium generation chemical breakdown under the heat effect of solar thermal energy, now system working pressure is the condensing pressure under environment temperature, the refrigerant vapour separating sucking-off enters in cold-producing medium reservoir and condenses, the condensation heat of release is transported to cooling tower by the heat-transfer fluid in reservoir heat exchange coil through circulating pump and enters environment, realize solar thermal energy to the transformation of energy of chemisorbed gesture and storage,
Evaporative phase-change absorption heat is there is in the heat energy release stage under utilizing the suction-operated of the heat accumulation salt adsorbent in solid-chemistry reactor of the cold-producing medium in cold-producing medium reservoir, cold-producing medium reservoir is used as evaporimeter, the evaporation latent heat consumed is provided by external environment medium by cooling tower, Gu the operating pressure of-chemistry reactor and cold-producing medium reservoir is the evaporating pressure under environment temperature, refrigerant vapour enters in solid-chemistry reactor and discharges a large amount of heats of adsorption with chemisorbed heat accumulating generation chemosynthesis reaction, this heat of adsorption is utilized to realize the heat supply of heat user terminal.
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