Model utility content
The technical problems to be solved in the utility model is, for the above-mentioned defect of prior art, provides the tower type solar solar-thermal generating system of the multiple heat-transfer working medium of a kind of employing that is sustainable, stable, efficiency power generation.
The utility model solves the technological scheme that its technical problem adopts:
Construct a kind of tower type solar solar-thermal generating system adopting multiple heat-transfer working medium, comprise: for collecting the solar heat collector of solar thermal energy, being connected with described solar heat collector, for generation of the heat exchanger of overheated saturated vapour, and being connected with described heat exchanger, for described overheated saturated vapour being converted to the heat power conversion equipment of electric energy; Wherein, described solar heat collector comprises multiple tower photo-thermal module with collection solar thermal energy; Multiple described tower photo-thermal module comprises the tower photo-thermal module of category-A adopting and concentrate heat accumulation and the tower photo-thermal module of category-B adopting distributed heat accumulation; The tower photo-thermal module of described category-B adopts fused salt as hot working fluid, and the tower photo-thermal module of described category-A adopts fused salt or steam as hot working fluid.
Tower type solar solar-thermal generating system described in the utility model, wherein, the tower photo-thermal module of all category-As all adopts fused salt as hot working fluid, connected in series or in parallel between the tower photo-thermal module of described category-A and the tower photo-thermal module of described category-B.
Tower type solar solar-thermal generating system described in the utility model, wherein, the tower photo-thermal module of a part of described category-A adopts fused salt as hot working fluid, and the tower photo-thermal module of category-A described in another part adopts steam as hot working fluid.
Tower type solar solar-thermal generating system described in the utility model, wherein, adopt fused salt to be all connected in parallel between the tower photo-thermal module of described category-A as hot working fluid as the tower photo-thermal module of described category-A of hot working fluid and employing steam, be connected in parallel between the tower photo-thermal module of described category-A and the tower photo-thermal module of described category-B.
Tower type solar solar-thermal generating system described in the utility model, wherein, the tower photo-thermal module of described category-A comprise for sunlight focusing the first heliostat and be provided with the first photo-thermal tower of the first heat collector;
The tower photo-thermal module of multiple described category-As is connected with described heat exchanger by the centralized heat storage units of heat hot working medium heat energy for storing in described first heat collector by one jointly.
Tower type solar solar-thermal generating system described in the utility model, wherein, the tower photo-thermal module of described category-B comprises the second heliostat for sunlight focusing, and comprise the second photo-thermal tower being provided with the second heat collector, also comprise and being connected with described second photo-thermal tower, for storing in described second heat collector by the distributed heat storage units of heat hot working medium heat energy.
Tower type solar solar-thermal generating system described in the utility model, wherein, described heat exchanger comprises multiple sub-heat exchanger, and the tower photo-thermal module of each described category-B comprises a described sub-heat exchanger.
Tower type solar solar-thermal generating system described in the utility model, wherein, the described sub-heat exchanger of the tower photo-thermal module of each described category-B is connected with described heat power conversion equipment for the high-temperature steam heat-storing device storing supersaturation hot steam by one jointly.
The beneficial effects of the utility model are: by adopting the tower photo-thermal module of category-B of the tower photo-thermal module of the category-A of concentrated heat accumulation and the distributed heat accumulation of employing, make tower type solar solar-thermal generating system can according to electricity consumption at night and by heat, by vapour Demand Design thermal energy storage amount, water vapour not with energy storage can be left in steam storage cylinder when night, the module of band energy storage is needed by parameter, realize power supply, heat supply, steam supply, effective use of energy sources; And this system has modularized solar energy collecting device simultaneously, when building large-scale photo-thermal power station again, only tower photo-thermal module need be copied, can Construction procedures be simplified, reduce the completion time of project, more can reduce generation system designs cost of investment.
Embodiment
The tower type solar solar-thermal generating system principle of the multiple heat-transfer working medium of employing of the utility model preferred embodiment as depicted in figs. 1 and 2, comprise: for collecting the solar heat collector of solar thermal energy, being connected with solar heat collector, for generation of the heat exchanger of overheated saturated vapour, and being connected with heat exchanger, for overheated saturated vapour being converted to the heat power conversion equipment 24 of electric energy; Solar heat collector comprises multiple tower photo-thermal module 11,12 with collection solar thermal energy; And multiple tower photo-thermal module comprises the tower photo-thermal module of category-A adopting and concentrate heat accumulation and the tower photo-thermal module of category-B adopting distributed heat accumulation; The tower photo-thermal module of category-B adopts fused salt as hot working fluid, and the tower photo-thermal module of category-A adopts fused salt or steam as hot working fluid.Water vapour not with energy storage can, according to need for electricity design at night thermal energy storage amount, can leave in steam storage cylinder, to reduce the insulation energy consumption at night by such tower type solar solar-thermal generating system when night.And, by adopting the tower type solar solar-thermal generating system with modularized solar energy collecting device, when building large-scale photo-thermal power station again, only tower photo-thermal module need be copied, power plant construction flow process can be simplified, reduce the completion time of project, more can reduce generation system designs cost of investment.
Meanwhile, adopt above-mentioned tower type solar solar-thermal generating system, what can also increase whole power generation system supplies electrical stability.If the photo-thermal power station of single tower, no matter which part goes wrong, the stability of whole power generation system all can be affected, when after employing modular solar power solar-thermal generating system, single tower goes wrong and can not have influence on the working state of other modules, ensure that the persistency that whole power generation system is powered and stability.In addition, adopt above-mentioned tower type solar solar-thermal generating system, the efficiency of heliostat mirror field can also be improved.If large-scale single tower solar-thermal generating system, the Jing Chang of far-end from tower top distance very away from, efficiency is very low, when after employing tower type solar solar-thermal generating system, can reduce the distance of Jing Chang from tower top, improve the efficiency of Jing Chang, reduces the investment of mirror scene sum.
In above-described embodiment, the heat power conversion equipment 24 of tower type solar solar-thermal generating system is preferably Turbo-generator Set, and concrete model is not limit.
In a further embodiment, as shown in Figure 1, Figure 2 and Figure 3, the multiple tower photo-thermal module 11,12 forming the solar heat collector in above-mentioned tower type solar solar-thermal generating system comprises: the tower photo-thermal module 11 of category-A.Wherein, the tower photo-thermal module of each category-A 11 comprise for sunlight focusing the first heliostat 111 and be provided with the first photo-thermal tower 112 of the first heat collector (not shown); The tower photo-thermal module of multiple category-A 11 is connected with heat exchanger 22 by the centralized heat storage units 113 of heat hot working medium heat energy for storing in the first heat collector by one jointly.
Refer to Fig. 1, above-mentioned category-A tower photo-thermal module 11 workflow is: flashed back the sunlight by the first heliostat 111, sunlight focusing the hot working fluid heated in the first photo-thermal tower 112 tower top first heat collector, be stored in common centralized heat storage units 113 by heat hot working medium heat energy in first heat collector of the tower photo-thermal module of all category-As 11, the heat energy stored produces overheated saturated vapour by heat exchanger 22, generates electricity to promote heat power conversion equipment 24.
Preferably, as shown in Figure 1, be also connected with Low Temperature Steam heat-storing device 23 between the photo-thermal tower of above-mentioned heat exchanger and the tower photo-thermal module 11 of category-A, the hot working fluid after heat exchanger 22 heat exchange is pumped into the first photo-thermal tower 112 tower top heating again, to recycle.
In a further embodiment, as shown in Figure 1, Figure 2 and Figure 4, form in the multiple tower photo-thermal module 11,12 of the solar heat collector in above-mentioned tower type solar solar-thermal generating system and also comprise simultaneously: the tower photo-thermal module 12 of category-B.Wherein, the tower photo-thermal module 12 of each category-B comprise for sunlight focusing the second heliostat 121, be provided with the second photo-thermal tower 122 of the second heat collector, and to be connected with the second photo-thermal tower 122, for storing in the second heat collector by the distributed heat storage units 124 of heat hot working medium heat energy.
That is, the tower photo-thermal module 11 of above-mentioned category-A is the photo-thermal modules not separately with heat storage units, just by adopting a centralized heat storage units 113 to realize centralized heat accumulation; The tower photo-thermal module of category-B 12 is photo-thermal modules of the distributed heat storage units 124 of band separately.
Preferably, as shown in Figure 4, in above-described embodiment, the tower photo-thermal module of each category-B 12 all connects a sub-heat exchanger 123, the sub-heat exchanger 123 of the tower photo-thermal module of each category-B 12 is connected to heat power conversion equipment 24 through a common high-temperature steam heat-storing device 13, is delivered to heat power conversion equipment 24 generates electricity with the supersaturation hot steam produced by each sub-heat exchanger 123 after storing.
As shown in Figure 2 and Figure 4, above-mentioned category-B tower photo-thermal module 12 workflow is: flashed back the sunlight by the second heliostat 121, sunlight focusing the hot working fluid heated in the second photo-thermal tower 122 tower top second heat collector, by the hot working fluid heated, a part is by distributed heat storage units 124 store heat, another part produces overheated saturated vapour by heat exchanger 123, generates electricity to promote heat power conversion equipment 24.
Preferably, as shown in Figure 4, in above-described embodiment, the sub-heat exchanger 123 of the tower photo-thermal module of each category-B 12 is all connected a Low Temperature Steam heat-storing device 125 with between the second photo-thermal tower 122, hot working fluid after the heat exchange of sub-heat exchanger 123 is pumped into the second photo-thermal tower 122 tower top heating again, to recycle.
In above-described embodiment, the high-temperature steam heat-storing device 13 of tower type solar solar-thermal generating system comprises a heat storage can, or is made up of multiple heat storage can.
In above-described embodiment, compared with the tower photo-thermal module 12 of category-B, although adopt the tower photo-thermal module of category-A 11 can relatively reduce produced overheated saturated vapour utilization ratio, the construction cost of whole tower type solar solar-thermal generating system can be saved.Compared with the tower photo-thermal module 11 of category-A, although adopt the tower photo-thermal module of category-B 12 can increase the construction cost of whole tower type solar solar-thermal generating system, but due to the utilization ratio to the overheated saturated vapour that each tower photo-thermal module produces can be improved, thus the generating efficiency of whole tower type solar solar-thermal generating system can be improved.
In above-described embodiment, the tower photo-thermal module of category-A 11 preferably adopts steam or fused salt as the hot working fluid of heat collector and centralized heat storage units; The tower photo-thermal module of category-B 12 preferably adopts fused salt as the hot working fluid of heat collector and distributed heat storage units.
In a specific embodiment 1, the tower photo-thermal module of all category-As 11 in tower type solar solar-thermal generating system all adopts steam all to adopt fused salt as hot working fluid as hot working fluid, the tower photo-thermal module 12 of all category-Bs, have at least two tower photo-thermal modules 11 of category-A connect (or in parallel) connect, or, have at least two tower photo-thermal modules 12 of category-B connect (or in parallel) connect, be connected in parallel between the tower photo-thermal module of category-A 11 and the tower photo-thermal module 12 of category-B.
In a specific embodiment 2, the tower photo-thermal module of all category-As 11 in tower type solar solar-thermal generating system all adopts fused salt all to adopt fused salt as hot working fluid as hot working fluid, the tower photo-thermal module 12 of all category-Bs, have at least two tower photo-thermal modules 11 of category-A connect (or in parallel) connect, or, have at least two tower photo-thermal modules 12 of category-B connect (or in parallel) connect, connected in series or in parallel between the tower photo-thermal module of category-A 11 and the tower photo-thermal module of category-B 12.
In a specific embodiment 3, the tower photo-thermal module 11 of a part of category-A in tower type solar solar-thermal generating system adopts fused salt as hot working fluid, the tower photo-thermal module 11 of another part category-A adopts steam as hot working fluid, and the tower photo-thermal module 12 of all category-Bs all adopts fused salt as hot working fluid; Fused salt is adopted all to be connected in parallel between the tower photo-thermal module 11 of category-A as hot working fluid as the tower photo-thermal module of category-A 11 of hot working fluid and employing steam, connected in series or in parallel between the tower photo-thermal module of category-B 12, be connected in parallel between the tower photo-thermal module of category-A 11 and the tower photo-thermal module 12 of category-B.
In another preferred embodiment, above-mentioned modular solar power power generation system comprises 20 tower photo-thermal modules, and the generated output of each tower photo-thermal module is 10MW; Comprising 10 tower photo-thermal modules of category-A 11 and 10 tower photo-thermal modules 12 of category-B, the category-B tower photo-thermal module 12 heat accumulation time of 10 band heat accumulations is 8 hours, 10 tower photo-thermal modules of the category-A not with heat accumulation, by superheated steam generation, concentrate the heat accumulation time to be 2 hours.
In the various embodiments described above, single tower photo-thermal module generated output can be 5-100MW, is preferably 10-25MW, to reach optimal power generation effect, but is not limited to the tower photo-thermal module adopting other power.
In above-described embodiment, the accurate control to system thermal energy storage can be realized by the following method: obtain night power consumption and with hot, use vapour demand parameter; According to night power consumption and with heat, use vapour demand parameter, thermal energy storage amount in the tower photo-thermal module of category-B of the distributed heat accumulation of control cincture, regulates the thermal energy storage amount in each distributed heat storage units of the tower photo-thermal module of category-B to be respectively used to generating, heat supply and steam supply.Wherein, power consumption demand produced and can be obtained according to the daily consumption habit analysis of user by power consumption control system night, by heat, can obtain according to the use enthusiasm condition of local factory steam consumption at night and four seasons resident by vapour parameter, by various parameter situation, adjustment night, each distributed energy storage system was respectively used to generating, heat supply and steam supply, distributed energy storage system can will generate electricity, steam supply, the each unit of heat supply independently gets up, can ensure that each unit runs not affect mutually, ensure the stability of each unit, realize the accurate control to thermal energy storage, improve energy utilization rate to greatest extent.
Preferably, can also when current time be night, water vapour is stored in the centralized steam storage tank of the tower photo-thermal module of category-A, such tower photo-thermal module will quit work at night, utilize fused salt to be stored in the centralized fused salt tank of the tower photo-thermal module of category-A by fused salt as the tower photo-thermal module of category-A of heat-transfer working medium.Water vapour not with energy storage can be left in when night like this in steam storage cylinder, the module of band energy storage be needed by parameter, realizes power supply, heat supply, steam supply, effective use of energy sources.
To sum up, water vapour not with energy storage according to need for electricity design at night thermal energy storage amount, can be left in when night in steam storage cylinder, the module of band energy storage be needed by parameter by the utility model scheme, realize power supply, heat supply, steam supply, effective use of energy sources; Simultaneously by adopting tower photo-thermal module, can Construction procedures be simplified, reducing the completion time of project, more can reduce Power Plant Design cost of investment, also can ensure the persistency that whole power generation system is powered and stability.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to the utility model claims.