Solar energy tracking focuses on generating and refrigeration system
Technical field
The present invention relates to sun power generating and refrigeration system, specifically refer to that solar energy tracking focuses on generating and refrigeration system.
Background technology
Sun power, as being again the ecological pure and unchanged energy of fuel balance on ball while of inexhaustible, has energy total amount big, easily realizes again a point advantage for dispersion utilization. But the solar thermal utilization of routine can only be used for low warm Application Areas, such as the solar water heater of family expenses, the low-temperature water heating recycle system etc., working medium temperature is low, it is difficult to meet industrial heat energy and solar energy thermal-power-generating demand, and application is extremely restricted.
Summary of the invention
It is an object of the invention to provide solar energy tracking and focus on generating and refrigeration system. This system can utilize solar energy heating, heat-storage technology, drives power generation assembly generating or refrigerator refrigeration.
The above-mentioned purpose of the present invention realizes by following technical solution: solar energy tracking focuses on generating and refrigeration system, it is characterized in that: described system comprises heat collector, heat storage can, drum, refrigerator, power generation assembly, cooling tower, cooling water tank, replenishing water tank of water, water collection tank I and water collection tank II, described heat collector is for absorbing the heat of sun power, the outlet of heat collector is connected by high-pressure water heating pipeline with the import of drum, the outlet of drum is connected with main steam header road, described main steam header road is divided into two pipelines in parallel at tail end, article one, pipeline is refrigerator steam inlet duct, it is connected with the steam inlet of refrigerator, another pipeline is power generation assembly steam inlet duct, it is connected with the steam inlet of power generation assembly, described refrigerator is also connected to refrigerated water water return pipeline, refrigerated water water-supply line, Zhi Guanlu I at the bottom of tower, tower top Zhi Guanlu I and refrigerator steam outleting pipe, described power generation assembly is also connected to Zhi Guanlu II at the bottom of tower, tower top Zhi Guanlu II and power generation assembly steam outleting pipe, described power generation assembly is also connected with generator, generator generating is driven by steam acting, described refrigerator steam outleting pipe and power generation assembly steam outleting pipe intersect, after crossing, suction culvert with cooling water tank is connected, described cooling tower has supervisor road at the bottom of tower top supervisor road and tower, Zhi Guanlu I at the bottom of described tower and Zhi Guanlu II at the bottom of tower intersects, it is connected with supervisor road at the bottom of described tower after crossing, described tower top Zhi Guanlu I and tower top Zhi Guanlu II intersects, it is responsible for road with described tower top after crossing to be connected, tap water water pipe also it is connected with at the bottom of cooling tower, the water outlet of described cooling water tank is connected with the import of heat collector by connecting pipeline, described water collection tank I and water collection tank II are along being arranged on described connecting pipeline from heat collector to the direction of cooling water tank, described cooling water tank also has collateral branch's pipeline, it is connected with the water-in of described replenishing water tank of water, the water outlet of replenishing water tank of water is connected with described connecting pipeline by water pipe, the pipeline section of tie point between water collection tank II and cooling water tank, the described drum drum Zhi Guanlu that also collateral branch one tunnel is connected with described water collection tank II, described water collection tank I is collateral branch one road water return pipeline also, described water return pipeline is connected with the high-pressure water heating pipeline of heat collector, the two ends of described heat storage can are connected to the hot suction culvert of storage and the hot outlet pipeline of storage, the high-pressure water heating pipeline storing up hot suction culvert and heat collector intersects, store up hot outlet pipeline and water return pipeline intersects, the hot suction culvert of described storage, connecting pipeline, supervisor road at the bottom of collateral branch's pipeline and tower is provided with water circulating pump, all pipelines are provided with valve, with the cut-out of pilot piping be connected, this system produces steam by heat collector and drum, then generated electricity by steam driven power generation assembly, or drive refrigerator refrigeration.
In the present invention, the preferred linear Fresnel of described heat collector follows the tracks of concentrating collector, it is also possible to adopt other can absorb solar heat, produces the heat collector of high-temperature high pressure water.Linear Fresnel follow the tracks of concentrating collector use plane mirror arrange, adopt single shaft thing follow the tracks of the sun mode, ensure sunlight always line focus in mirror row above resorber. Resorber adopts straight-through type evacuated collector tube, and interior pipe is stainless steel tube, and outer surface of steel tube has coating for selective absorption. It is vacuum heat-insulating layer between outer field Glass tubing and internal layer stainless steel tube.
In the present invention, the preferred lithium bromide absorption chiller of described refrigerator, it is also possible to select the refrigerator of other types.
In the present invention, the preferred organic Rankine bottoming cycle power generation assembly of described power generation assembly, it is also possible to select the power generation assembly of other types.
In the present invention, the heat-storing material of described heat storage can is HITEC fused salt, and HITEC fused salt is the mixture of saltpetre, SODIUMNITRATE and nitrous acid, and proportioning is: 7%NaNO3�� 53%KNO3�� 49%NaNO2, utilize the latent heat of phase change of HITEC fused salt to carry out accumulation of heat. Heat storage can heat-storing material is HITEC fused salt, and fusing point is about 142 DEG C. Follow the tracks of warm water concentrating collector liquid pressure-bearing out from linear Fresnel and enter the coil pipe in heat storage can, heat is passed to HITEC fused salt, then still flows out heat storage can with the form of liquid water. During heat storage can heat release, the coil pipe of the lower current of temperature in heat storage can, becomes the higher water of temperature and flows out heat storage can after absorbing the heat of fused salt.
In the present invention, in described drum, also it is provided with electric heater, it is necessary to time heats to the water entering drum, makes water vapor.
In the present invention, between described cooling water tank and replenishing water tank of water, also set up a road water return pipeline in parallel.
The heat collector of system of the present invention adopts linear Fresnel to follow the tracks of concentrating collector, water can be heated to 200 DEG C, it is possible to drives double-effect absorption refrigerating machine, and can drive organic Rankine bottoming cycle power generation. Refrigeration and generating two basic functions can be realized, heat storage can has stored energy and the function of heat release utilization simultaneously, fused salt phase-change thermal storage technology is because of the big feature of its storage density, and being applied in solar thermal collection system can increase the reliability and stability of system, and improves energy utilization rate.
In this system, heat collector adds hot water to state of saturation, enters drum and become steam after absorbing the heat of sun power, then the generating of steam driven organic Rankine bottoming cycle power generation assembly, or drives lithium bromide absorption chiller refrigeration. Heat collector go out the heat of water inadequate time, electric heater can be started as auxiliary thermal source. Collect heat when heat collector to have more than needed, or when not carrying out freezing and generating electricity, can unnecessary heat is stored in heat storage can, use time not enough in order to heat collector collection heat. Present invention uses middle temperature linear Fresnel and follow the tracks of concentrating collector, gather sun power to greatest extent, generating and refrigeration two basic functions can be realized. Add electrically heated and regenerative apparatus simultaneously, add the reliability of system, and improve capacity usage ratio.
Solar energy tracking of the present invention focuses on generating and refrigeration system can adopt following plurality of operating modes:
Operational mode one: when intensity of solar radiation is enough, the hot water that linear Fresnel follows the tracks of concentrating collector operation generation enters drum, being gasificated into steam and enter lithium bromide absorption chiller or organic Rankine bottoming cycle power generation assembly carries out freezing or generating electricity, now cooling tower is enabled. Cool through cooling water tank from lithium bromide absorption chiller or organic Rankine bottoming cycle power generation assembly water out, then enter linear Fresnel through water circulating pump pressurization and follow the tracks of concentrating collector and absorb the solar heat after focusing on, complete circulation.
Operational mode two: the hot water heat following the tracks of concentrating collector operation generation when linear Fresnel is had more than needed, and part flow of hot water carries out accumulation of heat through heat storage can, then enters linear Fresnel tracking concentrating collector and completes circulation.
Operational mode three: focus on generating and when not needing refrigeration or generate electricity of refrigeration system when solar energy tracking, follow the tracks of concentrating collector whole flow of hot water out from linear Fresnel and carry out accumulation of heat through heat storage can, then enter linear Fresnel and follow the tracks of concentrating collector and complete circulation.
Operational mode four: when intensity of solar radiation not, linear Fresnel follow the tracks of concentrating collector produce the heat of hot water not enough time, enable electric heater, give and again heat from heat collector water out, to meeting heat demand.
Operational mode five: when intensity of solar radiation not, linear Fresnel follow the tracks of concentrating collector produce the heat of hot water not enough time, enable heat storage can, give and again heat from heat collector water out, to meeting heat demand.
Operational mode six: when solar irradiation condition is not good, or when overcast and rainy, night, linear Fresnel is followed the tracks of concentrating collector and cannot be run, it is possible to enable heat storage can, to the heating of pipeline backwater, drive lithium bromide absorption chiller or organic Rankine bottoming cycle power generation assembly.
In the present invention, work when lithium bromide absorption chiller is different with organic Rankine bottoming cycle power generation assembly; Work when heat storage can is different with electric heater.
Compared with prior art, the present invention has following unusual effect:
(1) what the present invention adopted is that open steam produces system, the steam Direct driver absorptionmachine of generation or organic Rankine bottoming cycle power generation assembly, and system thermal loss is little, heat utilization efficiency height.
(2) what the heat collector of the present invention adopted is that linear Fresnel follows the tracks of concentrating collector, can fully gather sun power, and the concentrating collector of linear Fresnel tracking simultaneously is easy to maintenance, and cost is lower, wind resistance good.
(3) heat storage can heat accumulating of the present invention uses phase-change heat-storage material, and tank body storage density is big, and volume is little.
(4) system of the present invention has electric heater and heat storage can as auxiliary thermal source, good reliability.
(5) the present invention utilizes linear fresnel solar to follow the tracks of focusing solar collector, is used in organic Rankine cycle power generation system and absorption system by high-temperature heat-gathering technology in sun power, for the production domesticization of linear fresnel solar photothermal technique lays the foundation.
(6) the present invention there is electric heater in drum, when being necessary to the water heating entering drum, make water.
(7) in the present invention, from lithium bromide absorption chiller, or the water in organic Rankine bottoming cycle power generation assembly exit to be cooled through cooling water tank, and the water preventing exit is still steam condition, affect water circulating pump and works.
(8), in the present invention, cooling water tank and replenishing water tank of water connect into loop by pipeline, by loop water cycle, and the state keeping the temperature of water in cooling water tank lower.
(9), in the present invention, lithium bromide absorption chiller and organic Rankine bottoming cycle power generation assembly share a cooling tower, and initial cost saves cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Fig. 1 is the one-piece construction block diagram that solar energy tracking of the present invention focuses on generating and refrigeration system.
Description of reference numerals
1, heat collector; 2, heat storage can; 3, drum; 4, electric heater; 5, refrigerator; 6, cooling tower;
7, power generation assembly; 8, cooling water tank; 9, replenishing water tank of water; 10, water collection tank II; 11, water collection tank I;
12��15, water circulating pump; 16��25, magnetic valve; 26��31, stopping valve; 32, generator;
33, reducing valve; 34, safety exhaust; 35, steam-flow meter;
101, high-pressure water heating pipeline; 102, main steam header road; 103, refrigerator steam inlet duct;
104, power generation assembly steam inlet duct; 105, refrigerated water water return pipeline; 106, refrigerated water water-supply line;
107, Zhi Guanlu I at the bottom of tower; 108, tower top Zhi Guanlu I; 109, refrigerator steam outleting pipe;
110, Zhi Guanlu II at the bottom of tower; 111, tower top Zhi Guanlu II; 112, power generation assembly steam outleting pipe;
113, drum Zhi Guanlu; 114, tap water water pipe; 115, tower top supervisor road;
116, supervisor road at the bottom of tower; 117, suction culvert; 118, connecting pipeline; 119, collateral branch's pipeline;
120, water pipe; 121, water return pipeline in parallel; 122, water return pipeline;
123, hot outlet pipeline is stored up; 124, hot suction culvert is stored up;
Embodiment
Solar energy tracking as shown in Figure 1 focuses on generating and refrigeration system, this system comprises heat collector 1, heat storage can 2, drum 3, refrigerator 5, power generation assembly 7, cooling tower 6, cooling water tank 8, replenishing water tank of water 9, water collection tank I 11 and water collection tank II 10, heat collector 1 is linear Fresnel tracking concentrating collector, refrigerator 5 is lithium bromide absorption chiller, power generation assembly 7 is organic Rankine bottoming cycle power generation assembly, and heat collector 1 is for absorbing the heat of sun power. Linear Fresnel follow the tracks of concentrating collector use plane mirror arrange, adopt single shaft thing follow the tracks of the sun mode, ensure sunlight always line focus in mirror row above resorber. Resorber adopts straight-through type evacuated collector tube, and interior pipe is stainless steel tube, and outer surface of steel tube has coating for selective absorption. It is vacuum heat-insulating layer between outer field Glass tubing and internal layer stainless steel tube.
The outlet of heat collector 1 is connected by high-pressure water heating pipeline 101 with the import of drum 3, electric heater 4 also it is provided with in drum 3, the water heating entering drum 3 is given when needing, make water vapor, the outlet of drum 3 is connected with main steam header road 102, main steam header road 102 is divided into two pipelines in parallel at tail end, article one, pipeline is refrigerator steam inlet duct 103, it is connected with the steam inlet of refrigerator 5, another pipeline is power generation assembly steam inlet duct 104, it is connected with the steam inlet of power generation assembly 7, refrigerator 5 is also connected to refrigerated water water return pipeline 105, refrigerated water water-supply line 106, Zhi Guanlu I 107 at the bottom of tower, tower top Zhi Guanlu I 108 and refrigerator steam outleting pipe 109, power generation assembly 7 is also connected to Zhi Guanlu II 110 at the bottom of tower, tower top Zhi Guanlu II 111 and power generation assembly steam outleting pipe 112, power generation assembly 7 is also connected with generator 36, generator generating is driven by steam acting, refrigerator steam outleting pipe 109 and power generation assembly steam outleting pipe 112 intersect, after crossing, suction culvert 117 with cooling water tank 8 is connected, cooling tower 6 has supervisor road 116 at the bottom of tower top supervisor road 115 and tower, Zhi Guanlu I 107 at the bottom of tower and Zhi Guanlu II 110 at the bottom of tower intersects, it is connected with supervisor road 116 at the bottom of tower after crossing, tower top Zhi Guanlu I 108 and tower top Zhi Guanlu II 111 intersects, it is responsible for road 115 with tower top after crossing to be connected, tap water water pipe 114 also it is connected with at the bottom of cooling tower 6 tower, the water outlet of cooling water tank 8 is connected by the import of connecting pipeline 118 with heat collector 1, water collection tank I 11 and water collection tank II 10 are arranged on connecting pipeline 118 along from heat collector 1 to the direction of cooling water tank 8, cooling water tank 8 also has collateral branch's pipeline 119, it is connected with the water-in of replenishing water tank of water 9, the water outlet of replenishing water tank of water 9 is connected with connecting pipeline 118 by water pipe 120, the pipeline section of tie point between water collection tank II 10 and cooling water tank 8, a road water return pipeline 121 in parallel is also set up between cooling water tank 8 with replenishing water tank of water 9, the drum 3 drum Zhi Guanlu 113 that also collateral branch one tunnel is connected with water collection tank II 10, water collection tank I 10 is collateral branch one road water return pipeline 122 also, water return pipeline 122 is connected with the high-pressure water heating pipeline 101 of heat collector 1, the two ends of heat storage can 2 are connected to the hot suction culvert 124 of storage and the hot outlet pipeline 123 of storage, the high-pressure water heating pipeline 101 storing up hot suction culvert 124 and heat collector 1 intersects, store up hot outlet pipeline 123 to intersect with water return pipeline 122.
Store up and supervisor road 116 at the bottom of hot suction culvert 124, connecting pipeline 118, collateral branch's pipeline 119 and tower is provided with water circulating pump 12��15, by water circulating pump pump pressure liquid water, all pipelines are provided with valve, with the cut-out of pilot piping be connected, the valve arranged on pipeline comprises magnetic valve 16��25, stopping valve, vent valve etc., this system also comprises the parts such as temperature sensor, pressure transmitter, under meter, and arranging of these valves, sensor, under meter all adopts routine techniques means to realize. This system produces steam by heat collector 1 and drum 3, is then generated electricity by steam driven power generation assembly 7, or drives refrigerator 5 to freeze.
In the present embodiment, heat collector 1, refrigerator 5, power generation assembly 7 are preferred existing installation or device, heat collector 1 follows the tracks of concentrating collector except choosing linear Fresnel, it is also possible to adopts other can absorb solar heat, produces the heat collector of high-temperature high pressure water. Refrigerator 5 is except choosing lithium bromide absorption chiller, it is also possible to select the refrigerator of other types. Power generation assembly 7 is except choosing organic Rankine bottoming cycle power generation assembly, it is also possible to select the power generation assembly of other types.
The heat-storing material of heat storage can 2 is HITEC fused salt, utilizes the latent heat of phase change of HITEC fused salt to carry out accumulation of heat. It is that 200 DEG C of hot water enter the coil pipe heat storage can 2 from the temperature of heat collector 1 liquid pressure-bearing out, heat is passed to HITEC fused salt, then still flows out heat storage can 2 with the form of liquid water. During heat storage can heat release, the coil pipe of the lower current of temperature in heat storage can, becomes the higher water of temperature and flows out heat storage can after absorbing the heat of HITEC fused salt.
The system of the present embodiment is operationally, it is possible to adopt following plurality of operating modes:
Operational mode one: when intensity of solar radiation is enough, run heat collector 1, close stopping valve 26,29,30, open stopping valve 28,31, close recycle pump 13, close electric heater 4, allow from heat collector 1 temperature out be 200 DEG C, pressure be that the High Temperature High Pressure hot water of 20 normal atmosphere enters drum 3, being gasificated into the steam that temperature is 150 DEG C, pressure is 5 normal atmosphere in drum and enter refrigerator 5 or power generation assembly 7 carries out freezing or generating electricity, now cooling tower 6 is enabled. Work when refrigerator 5 and power generation assembly 7 are different.
When refrigerator 5 freezes, magnetic valve 18,21,23 cuts out, magnetic valve 19,20,22,25 is opened, refrigerator steam outleting pipe 109 vapor temperature out is 120 DEG C, the water temperature entering refrigerator 5 from refrigerated water water return pipeline 105 is 12 DEG C, and the water temperature flowing into refrigerated water water-supply line 106 from refrigerator 5 is 7 DEG C, is 28 DEG C from the water temperature on supervisor road 116 at the bottom of tower, after heat exchange, the water temperature entering tower top supervisor road 115 is 35 DEG C.
When power generation assembly 7 generates electricity, magnetic valve 19,20,22 cuts out, and power generation assembly steam outleting pipe 112 vapor temperature out opened by magnetic valve 18,21,23,24 is 120 DEG C, is 28 DEG C from the water temperature on supervisor road 116 at the bottom of tower, after heat exchange, the water temperature entering tower top supervisor road 115 is 35 DEG C.
It is cooled to liquid water from refrigerator 5 or power generation assembly 7 water out through cooling water tank 8, then enters heat collector 1 through water circulating pump 12 pressurization and absorb the solar heat after focusing on, complete circulation. Cool through cooling water tank 8 from refrigerator 5 or power generation assembly 7 water out, in order to prevent the water in exit from being still steam condition, affect the work of water circulating pump 12,15.Refrigerator 5 and power generation assembly 7 share a cooling tower 6, and initial cost saves cost.
Operational mode two: run the hot water heat produced when heat collector 1 and have more than needed, on the basis of operational mode one, opens solenoid valve 16,17 simultaneously, and ON cycle water pump 3, close stopping valve 26,27, allowing part flow of hot water carry out accumulation of heat through heat storage can 2, then enter water collection tank I 11, the water come with water collection tank II 10 enters heat collector 1 after converging. Another part water enters drum 5, and flow process is with operational mode one.
Operational mode three: focus on generating and when not needing refrigeration or generate electricity of refrigeration system when solar energy tracking, opens solenoid valve 16,17, and ON cycle water pump 3, close stopping valve 26,27,28, carry out accumulation of heat from heat collector 1 whole flow of hot water out through heat storage can 2, then enter heat collector 1 and complete circulation.
Operational mode four: when intensity of solar radiation not, heat collector 1 produce the heat of hot water not enough time, on the basis of operational mode one, enable electric heater 4, give and again heat from heat collector water out, to meeting heat demand.
Operational mode five: when intensity of solar radiation is inadequate, linear Fresnel follows the tracks of the heat deficiency that concentrating collector produces hot water, on the basis of operational mode one, open stopping valve 26,27 and magnetic valve 17, close stopping valve 30 and magnetic valve 16, close water circulating pump 13, enable heat storage can 2, give and again heat from heat collector water out, to meeting heat demand.
Operational mode six: when solar irradiation condition is not good, or when overcast and rainy, night, linear Fresnel is followed the tracks of focusing heat collection 1 and cannot be run, close stopping valve 26,31, close water circulating pump 13, open stopping valve 27 and magnetic valve 17, enable heat storage can 2, to the heating of pipeline backwater, drive refrigerator 5 or power generation assembly 7.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited to this; all this kind is according to the foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought prerequisite of the present invention; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.