CN105091369A - Disk-type solar energy utilization system and control method thereof - Google Patents
Disk-type solar energy utilization system and control method thereof Download PDFInfo
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- CN105091369A CN105091369A CN201410207070.4A CN201410207070A CN105091369A CN 105091369 A CN105091369 A CN 105091369A CN 201410207070 A CN201410207070 A CN 201410207070A CN 105091369 A CN105091369 A CN 105091369A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a disk-type solar energy utilization system and a control method thereof. The solar energy utilization system is automatically controlled according to the sun elevating angle and azimuth angle, the wind speed of the place where the system is located and the temperature in a receiver of the solar energy utilization system. By means of the disk-type solar energy utilization system and the control method thereof, the solar energy utilization system can be fully automatically controlled so that the solar energy utilization system can automatically operate under various complex conditions around the clock. The maximum heat collection amount of the system is obtained, and meanwhile the safety of all the parts of the system and the reliability of the whole solar energy utilization system are guaranteed.
Description
[technical field]
The invention belongs to field of solar energy, particularly about disc type solar energy heat utilization system and control method thereof.
[background technology]
According to the difference of spot mode, high temperature solar heat utilization can be divided into tower, slot type, Fresnel and dish-style etc.In these techniques, remarkable advantages such as when disc type solar energy is because heat-collecting temperature is high, floor space is little, the impact of dependent station geographic latitude is little, for generating electricity thermoelectrical efficiency is high and obtain extensive attention.
In disc type solar energy heat utilization system, the solar farm formed by multiple dish-style optically focused dish array is core.According to the single collection area of optically focused dish and the difference of system scale, small-sized solar farm only may comprise one or several optically focused dish, and large solar farm then may comprise thousands of tens thousand of optically focused dish.In order to improve the efficiency of solar farm and total heat-collecting capacity, and ensure the safety of solar farm and the reliability of system, need to carry out Automatic Control to solar farm, such as under normal operating conditions, the opening controlling each optically focused dish faces the sun, and along with time and position of sun displacement and in pitch orientation and circumferential movement, to ensure that the opening of optically focused dish faces the sun all the time, or in sunrise with start automatically at sunset and close whole system, or at too high wind speed, receiver temperature is too high, working medium flow exceedes automatic closing system under the abnormal conditions such as pump/maximum permissible flow of blower fan, can also normally run by automatic start up system again after Abnormality remove.
[summary of the invention]
The object of the present invention is to provide a kind of control method of disc type solar energy heat utilization system.
Another object of the present invention is to the disc type solar energy heat utilization system that a kind of automatic control is provided.
For reaching aforementioned object, a kind of according to an embodiment of the invention control method of disc type solar energy heat utilization system, it comprises:
The timing point of setting predetermined time interval, at the on-site sun altitude of each timing point computing system and azimuth;
When present timing point sun altitude is greater than predetermined angle, and last timing point sun altitude is less than or equal to predetermined angle constantly, start to start described disc type solar energy heat utilization system, and drive the condenser of disc type solar energy heat utilization system to precalculated position according to the solar azimuth of present timing point;
When present timing point sun altitude is less than or equal to predetermined angle, and last timing point sun altitude is greater than predetermined angle constantly, starts to close described disc type solar energy heat utilization system.
According to one embodiment of present invention, described predetermined angle is zero degree.
According to one embodiment of present invention, described disc type solar energy heat utilization system comprises the wind speed measuring device gathering wind speed, described method also comprises and utilizes described wind speed measuring device to gather the on-site wind speed of described disc type solar energy heat utilization system, mean wind speed before the more described timing point of each timing point in the scheduled time and preset security wind speed, when mean wind speed described in present timing point is less than described preset security wind speed, when described in last timing point, mean wind speed is more than or equal to described survival wind speed, start to start described disc type solar energy heat utilization system; When mean wind speed described in present timing point is more than or equal to described preset security wind speed, mean wind speed described in last timing point is less than described preset security wind speed, starts to close described disc type solar energy heat utilization system.
According to one embodiment of present invention, described disc type solar energy heat utilization system comprises the thermometer of collecting temperature, described method also comprises the temperature utilized in described thermometer collection disc type solar energy heat utilization system, mean temperature before the more described timing point of described timing point in the scheduled time in Solar Energy Heat Utilization System and preset security temperature, when mean temperature described in present timing point is greater than described preset security temperature, control condenser and depart from the operation of sun predetermined angular, and record current bin for departing from state; When mean temperature described in present timing point is less than described preset security temperature, check that whether receiver state is for departing from state, if receiver state is normal condition, system keeps normal and runs; If receiver state is for departing from state, judge whether the mean temperature in present timing point Solar Energy Heat Utilization System is less than default recurrence temperature, if the mean temperature in present timing point Solar Energy Heat Utilization System is less than to preset return temperature, control condenser just to the sun, System recover normally runs, and record identifier receiver is normal condition; If the mean temperature in present timing point Solar Energy Heat Utilization System is more than or equal to preset return temperature, control system continues to keep condenser to depart from sun predetermined angular running status, and the temperature value of wherein said default recurrence temperature is lower than the temperature value of preset security temperature.
According to one embodiment of present invention, described temperature counts at least two thermometers, the temperature of the different parts in the disc type solar energy heat utilization system of the temperature in described thermometer collection disc type solar energy heat utilization system measured by least two thermometers, described preset security temperature is the preset security temperature of corresponding described different parts.
According to one embodiment of present invention, when starting to start described disc type solar energy heat utilization system, record the time of present timing point for starting start-up time simultaneously, when next timing point, judge whether next timing point is greater than the startup required time of described disc type solar energy heat utilization system apart from the described time interval starting start-up time, when next timing point described is less than the startup required time of described disc type solar energy heat utilization system apart from the described time interval starting start-up time, then continue to open described disc type solar energy heat utilization system; When next timing point described is greater than the startup required time of described disc type solar energy heat utilization system apart from the described time starting start-up time, then keeping system is normally run, and wherein said startup required time normally runs institute's interlude for system starts startup to system; Or when starting to close described disc type solar energy heat utilization system, record the time of present timing point for starting the shut-in time simultaneously, when next timing point, judge whether next timing point is greater than the closedown required time of described disc type solar energy heat utilization system apart from the time interval of described beginning shut-in time, when next timing point described is less than the closedown required time of described disc type solar energy heat utilization system apart from the time interval of described beginning shut-in time, then close described disc type solar energy heat utilization system; When next timing point described is apart from the closedown required time interval greater than described disc type solar energy heat utilization system of described beginning shut-in time, then keeping system is out of service, and wherein said closedown required time starts the system that closes to institute out of service interlude for system.
According to one embodiment of present invention, wherein said disc type solar energy heat utilization system also comprises heat-exchange system, the volume control device that described heat-exchange system comprises heat transferring medium transmission pipeline and is arranged on transmission pipeline, heat transferring medium enters the receiver of Solar Energy Heat Utilization System by described transmission pipeline, and carry out heat exchange with heat-absorbing material wherein, described control method also comprises according to the on-site beam radia amount of described disc type solar energy heat utilization system, the specific heat of described heat transferring medium, the temperature computation heat transferring medium flow of the heat transferring medium that the temperature of described receiver porch heat transferring medium and receiver exit are expected, by volume control device according to the heat transferring medium flow in the heat transferring medium flow controls transfer pipeline of described calculating, the minimum permissible flow of described heat transferring medium when initialization system runs, when minimum permissible flow lower than this system cloud gray model of the heat transferring medium flow of described calculating, heat transferring medium flow in transmission pipeline is controlled the minimum permissible flow for described setting by volume control device, when the heat transferring medium flow of described calculating is greater than the maximum permissible flow of described volume control device, heat transferring medium flow in transmission pipeline is controlled the maximum permissible flow for described volume control device by volume control device.
According to one embodiment of present invention, the wherein said solar azimuth according to present timing point drives the condenser of disc type solar energy heat utilization system to comprise to precalculated position: the elevation angle and the azimuth that accurately calculate each moment sun every day in advance according to the on-site geographical position of Solar Energy Heat Utilization System, by these information storage calculated in control system, at present timing point, control system, according to the elevation angle of the sun of stored current time and azimuth information, exports control signal and makes the minute surface of optically focused dish just to the sun; Or system gathers position of sun information by one group of sensor, and the difference of the information gathered by these sensors of comparative analysis, to determine the error of the relative sun image of optically focused dish, the position then adjusting condenser makes the minute surface of condenser just to the sun.
For reaching another object aforementioned, according to one embodiment of present invention, a kind of disc type solar energy heat utilization system, it comprises optically focused dish and control system;
Described optically focused dish comprise collect the condenser of sunshine and supporting construction thereof, reception condenser reflection ray and solar energy be converted into heat receiver, support fixing described receiver support and drive described condenser to follow the tracks of the solar tracking subsystem of the sun;
Described control system adopts aforesaid method output control signal to control the operation of described disc type solar energy heat utilization system.
According to one embodiment of present invention, described control system also exports the operation that control signal controls described solar tracking subsystem.
Disc type solar energy heat utilization system of the present invention, Automatic Control can be carried out to Solar Energy Heat Utilization System, make it to meet round-the-clock Various Complex operating mode, such as, automatic operation under operating modes such as starting, close, wind speed is too large, receiver temperature is too high or flow is excessive, ensures the security of each parts of system and the reliability of whole Solar Energy Heat Utilization System while the maximum heat-collecting capacity of the system of acquisition.
[accompanying drawing explanation]
Fig. 1 is the rough schematic view of the single dish Solar Energy Heat Utilization System of one embodiment of the invention, and wherein control system is according to the on-site sun altitude of system and azimuth, controls the operation of Solar Energy Heat Utilization System.
Fig. 2 is the control method flow chart of single dish Solar Energy Heat Utilization System embodiment illustrated in fig. 1.
Fig. 3 is the schematic diagram of the single dish Solar Energy Heat Utilization System of another embodiment of the present invention, and wherein control system is according to the operation of the on-site sun altitude of system and blast velocity control Solar Energy Heat Utilization System.
Fig. 4 is the control method flow chart of single dish Solar Energy Heat Utilization System embodiment illustrated in fig. 3.
Fig. 5 is the schematic diagram of the single dish Solar Energy Heat Utilization System of one more embodiment of the present invention, wherein control system central controller according to the on-site sun altitude of system and and the temperature of wind speed and internal system control the operation of Solar Energy Heat Utilization System.
Fig. 6 is the control method flow chart of single dish Solar Energy Heat Utilization System embodiment illustrated in fig. 5.
Fig. 7 is the control method flow chart of heat transferring medium flow in the heat-exchange system of the single dish Solar Energy Heat Utilization System of one embodiment of the present of invention.
Fig. 8 is the rough schematic view of the Solar Energy Heat Utilization System be made up of multiple optically focused dish of one embodiment of the present of invention.
[detailed description of the invention]
Detailed description of the present invention carrys out the running of direct or indirect simulation technical solution of the present invention by schematic diagram, flow process, step, process or other symbolistic descriptions, it is made thoroughly to understand the present invention for effectively introducing work essence of the present invention to those skilled in the art, set forth many specific detail in ensuing description, and when not having these specific detail, the present invention still can realize.On the other hand, be object of the present invention of avoiding confusion, the method for some easy understand known or process, do not describe in detail in the following description.
Alleged herein " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the present invention.Different local in this manual " in one embodiment " or " embodiment " occurred not all refers to same embodiment, neither be independent or the embodiment optionally mutually repelled with other embodiments.
Disc type solar energy heat utilization system according to an embodiment of the invention, described heat utilization can have multiple application mode, such as described heat utilization can be directly utilize solar energy to add thermosetting medium steam to heat-absorbing medium, then the heat utilization that steam medium carries out is utilized, or first utilize heat-absorbing material to absorb heat, then carry out heat exchange by heat-exchange system and heat-absorbing material, then utilize heat utilization of the medium after heat exchange etc., will not enumerate herein.Below will there to be working medium transmission system, the Solar Energy Heat Utilization System of being carried out solar thermal utilization by heat exchange is example, is described by reference to the accompanying drawings to wherein several specific embodiment of the present invention.
Refer to shown in Fig. 1, the rough schematic view of the single dish Solar Energy Heat Utilization System of its display one embodiment of the present of invention, as shown in Figure 1, described single dish Solar Energy Heat Utilization System comprises condenser 1, receiver 2, receiver holder 3, solar tracking subsystem 4, working medium transmission system 5 and control system 6.
Described condenser 1 is the paraboloidal mirror of a circular dish-style, when sunlight is on this condenser 1, light through reflecting focal to its focus place.This paraboloidal mirror can be made up of the minute surface that a monoblock is complete, also can be to be arranged side by side the circular dish-style minute surface formed by polylith cambered surface minute surface, then or the dish-style parabola minute surface that is jointly made up of the little square or circular minute surface of multiple dispersion.
Described receiver 2 is placed in the focus place of condenser, for receiving the sunshine that described condenser converges, described receiver 2 inside comprises heat-absorbing material (not shown), described heat-absorbing material absorbs the heat of sunshine, solar energy is converted to heat energy, can various ways be had about the type of receiver and concrete structure, illustrate no longer one by one herein.
Described receiver holder 3 is focal positions that the reflection ray for described receiver being fixed on whole condenser converges.Wherein this receiver holder 3 can be that the edge other end that condenser is fixed in many one end converges the cylindrical stent being fixed on described receiver towards condenser focus, or described receiver holder 3 comprises many cylindrical stents, condenser edge is fixed in one end of these cylindrical stents, the other end is connected to a circular ring type fixed mount jointly, and described receiver is fixed in annular fixed mount; Again or described receiver holder 3 also can be that condenser edge is fixed in one end, the other end single support being fixed on receiver etc.
Described solar tracking subsystem 4 moves for driving described condenser 1, makes the minute surface of condenser 1 all the time just to the control device of the sun.The control method of described solar tracking subsystem 4 has a variety of, can be such as the elevation angle and the azimuth that accurately calculate each moment sun every day in advance according to the on-site geographical position of Solar Energy Heat Utilization System, by these information storage calculated in control system, in the concrete a certain moment, control system is according to the elevation angle of the sun of stored current time and azimuth information, export control signal, drive optically focused dish to rotate by motor or hydraulic system, make the minute surface of optically focused dish just to the sun.Or also can be described solar tracking subsystem gathers position of sun information by one group of sensor, and the difference of the information gathered by these sensors of comparative analysis, to determine the error of the relative sun image of optically focused dish, then adjust the position of condenser.To illustrate no longer one by one detailed description about the method for specifically how to follow the trail of the sun herein.
Described working medium transmission system 5 comprises heat transferring medium transmission pipeline 51 and is arranged at the volume control device 52 on transmission pipeline 51, and heat transferring medium flows in described transmission pipeline 51.Described transmission pipeline 51 is connected with described receiver 2, when cold heat transferring medium flows through the heat-absorbing material of receiver 2 by transmission pipeline 51, cold heat transferring medium absorbs the heat of heat-absorbing material, the heat transferring medium becoming heat flows out from the other one end of transmission pipeline, and the heat transferring medium driving steam turbine of heat then can be utilized to carry out generating electricity or carry out other application.The volume control device 52 of described working medium transmission system 5 drives described heat transferring medium to flow in described transmission pipeline 51, and this volume control device 52 can regulate the flow of heat transferring medium in described transmission pipeline 51 simultaneously.In one embodiment of the invention, described volume control device 52 is pump or blower fan.For pump, when pump 52 starts, heat transferring medium can be driven to circulate in transmission pipeline 51, regulate the watt level of pump 52, then can regulate the flow of heat transferring medium in transmission pipeline 51, when pump 52 cuts out, then heat transferring medium cannot flow in transmission pipeline 51, when pump 52 reaches peak power, then in transmission pipeline 51, the flow of the heat transferring medium of flowing reaches maximum.Because each concrete pump has corresponding maximum range power, when pump reaches maximum range power, in transmission pipeline 51, the flow of the heat transferring medium of flowing is limited to the maximum range power of pump, cannot continue to increase, can only remain on maximum stream flow.
In this embodiment, described control system 6 is a computer, and described computer comprises central processing unit, and described central processing unit can carry out computing according to input instruction and export control signal.In other embodiments, described control system 6 also can for single-chip microcomputer or other can carry out according to the instruction of input and/or the information of collection the industrial control equipment that computing exports control signal.
Embodiment according to Fig. 1, described control system 6, according to the elevation angle of the sun and azimuth, controls automatically to single dish Solar Energy Heat Utilization System.When the sun is at sunrise, control single dish Solar Energy Heat Utilization System and automatically start, when the sun is at sunset, control single dish Solar Energy Heat Utilization System and automatically close; During daytime, control system drives condenser motion according to solar azimuth and faces the sun all the time, and post sunset system closing and be in run-stopping status.During the work of this Solar Energy Heat Utilization System, sunlight is on condenser 1, sunshine is converged to receiver 2 by condenser 1, the heat-absorbing material of receiver 2 absorbs the heat of the sunshine converged, the heat transferring medium of working medium transmission system 5 and the heat-absorbing material of receiver 2 carry out heat exchange, cold heat transferring medium becomes the heat transferring medium of high heat after heat exchange, and high hot heat transferring medium is employed after being with heat.Wherein solar tracking subsystem 4 drives condenser 1 to move, and makes condenser 1 minute surface all the time just to the sun, improves heat collection efficiency.Control system 6 controls solar tracking subsystem 4, the volume control device 52 of working medium transmission system 5 and the startup of Solar Energy Heat Utilization System and closedown.Wherein the startup of Solar Energy Heat Utilization System refers to control system 6 and exports control signal, drive the power initiation of Solar Energy Heat Utilization System, start to start solar tracking subsystem, drive motors or hydraulic system make the condenser of Solar Energy Heat Utilization System start the Solar Energy Heat Utilization System such as the volume control device aimed at the sun and start heat-exchange system normally work before process.Described closedown refers to control system and exports control signal, the motor or the hydraulic system that control Solar Energy Heat Utilization System make the condenser of Solar Energy Heat Utilization System be returned to elemental height angle (i.e. 0 degree of angle), the process before the Solar Energy Heat Utilization System such as the volume control device of initial orientation angle, closedown heat-exchange system and the power supply of closedown Solar Energy Heat Utilization System quit work.
Refer to shown in Fig. 2, its display startup of Solar Energy Heat Utilization System of the embodiment shown in Fig. 1 and flow chart of the control method of closedown.As shown in Figure 2, the control method of the first embodiment of the present invention comprises:
Step S21: the timing point of the setting interval scheduled time, at each timing point, the central processing unit of control system calculates the sun altitude of present timing point.The scheduled time at wherein said interval can be the several seconds, such as 2-5 second, or this predetermined time also can be very shortly be similar to the continuous print time interval time, the length of described default interval time can according to the requirement free setting of the situation of system or user.The computing formula of sun altitude is in this embodiment:
wherein δ represents solar declination (i.e. the geographic latitude of subsolar point),
the on-site geographic latitude of expression system, t represents system on-site local time (hour angle), and wherein solar declination and geographic latitude are all north latitude is just, south latitude is negative.Also can adopt the method for other astronomical calculating sun altitude in other embodiments, illustrate no longer one by one herein.
Step S22: judge whether the sun altitude of present timing point is greater than 0, if the sun altitude of present timing point is greater than 0, in then representing that this moment sun on high, carry out step S23, if the sun altitude of present timing point is not more than 0, then represent this moment sun not aloft, carry out step S24;
Step S23: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is not more than 0, then because present timing point sun altitude is greater than 0, represent that the sun carves at this moment now aerial, and last timing point sun altitude is not more than 0, mean that the previous moment sun does not occur, so this moment be at sunrise between, need to start described single dish Solar Energy Heat Utilization System, now control system exports and starts control signal, start to start described single dish Solar Energy Heat Utilization System, the time starting to start can be recorded simultaneously, if last timing point sun altitude is greater than 0, then carry out step S25.
Step 24: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is greater than 0, then because current time sun altitude is not more than 0, represent the sun not aloft this moment, and last timing point sun altitude is greater than 0, represent the previous moment sun also aloft, so current time is sunset time, need to close described single dish Solar Energy Heat Utilization System, now control system exports closing control signal, start to close described single dish Solar Energy Heat Utilization System, the time starting to close can be recorded simultaneously; If last timing point sun altitude is not more than 0, then carry out step S26;
Step S25: the startup required time whether being greater than single dish Solar Energy Heat Utilization System interval time judging current time and beginning start-up time of recording.Because the startup of system and closing not instantaneously completes, need a period of time, each timing point interlude is shorter than the time needed for each startup and closedown in this embodiment, when certain timing point needs unlatching or shutdown system, also may not complete unlatching or closing process to next timing point, therefore need to judge whether this timing point and the interval time starting to start or start the shut-in time are greater than and open required time or close required time.If the startup required time being less than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then control system continues to send startup control signal, continues start up system; If the start-up time being greater than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then represent that system completes startup in interlude, this moment needs single dish Solar Energy Heat Utilization System to continue to keep normal operating condition, control system sends normally runs control signal, and system continues to keep normal and runs.
Step S26: judge current time and the closedown required time whether being greater than single dish Solar Energy Heat Utilization System interval time of beginning shut-in time recorded, if current time and the closedown required time being not more than single dish Solar Energy Heat Utilization System interval time of beginning shut-in time recorded, then control system continues to send closing control signal, continues shutdown system; If current time and the closedown required time being greater than single dish Solar Energy Heat Utilization System interval time of beginning shut-in time recorded, then represent that system completes closedown in interlude, system is out of service, this moment needs single dish Solar Energy Heat Utilization System to continue to keep run-stopping status, then control system sends control signal out of service, and single dish Solar Energy Heat Utilization System keeps out of service.
In the aforementioned embodiment, the startup of system and closedown are carry out starting and closing when 0 at sun altitude, also can set this sun altitude in other embodiments as carrying out opening or closing when presetting arbitrarily angled, such as set sun altitude be 0.5 degree or 1 degree or 10 degree etc. angularly time carry out opening or closing.
In the embodiment shown in fig. 1, can further include the position of sun calculating present timing point, position of sun according to present timing point drives the step of condenser to precalculated position of disc type solar energy heat utilization system, described step comprises: the elevation angle and the azimuth that accurately calculate each moment sun every day in advance according to the on-site geographical position of Solar Energy Heat Utilization System, by these information storage calculated in control system, at present timing point, control system is according to the elevation angle of the sun of stored current time and azimuth information, exporting control signal makes the minute surface of optically focused dish just to the sun, or system gathers position of sun information by one group of sensor, and the difference of the information gathered by these sensors of comparative analysis, to determine the error of the relative sun image of optically focused dish, the position then adjusting condenser makes the minute surface of condenser just to the sun.
Refer to shown in Fig. 3, the rough schematic view of the single dish Solar Energy Heat Utilization System of its display another embodiment of the present invention.As shown in Figure 3, in this embodiment, described single dish Solar Energy Heat Utilization System comprises the condenser 1 shown in earlier figures 1, receiver 2, receiver holder 3, solar tracking subsystem 4, working medium transmission system 5 and control system 6 equally.Identical part embodiment illustrated in fig. 3 and embodiment illustrated in fig. 1, no longer repeat specification herein, embodiment illustrated in fig. 3ly to be with the difference of the embodiment shown in Fig. 1, in the embodiment shown in fig. 3, also comprise can the airspeedometer 7 of measuring system location wind speed for described single dish Solar Energy Heat Utilization System.The control system 6 of the embodiment shown in Fig. 3 receives the on-site wind velocity signal of system measured by airspeedometer 7, controls single dish Solar Energy Heat Utilization System in conjunction with the altitude of the sun angle information calculated and wind speed information.
Refer to shown in Fig. 4, the control method flow chart of the embodiment of the single dish Solar Energy Heat Utilization System of its display shown in Fig. 3.Described control method comprises:
Step S41: the timing point of the setting interval scheduled time, at each timing point, the central processing unit of control system calculates the sun altitude of present timing point.The scheduled time at wherein said interval can be the several seconds, such as 2-5 second, or this predetermined time also can be very shortly be similar to the continuous print time interval time, the length of described default interval time can according to the requirement free setting of the situation of system or user.The computing formula of sun altitude is in this embodiment:
wherein δ represents solar declination (i.e. the geographic latitude of subsolar point),
the on-site geographic latitude of expression system, t represents system on-site local time (hour angle), and wherein solar declination and geographic latitude are all north latitude is just, south latitude is negative.Also can adopt the method for other astronomical calculating sun altitude in other embodiments, illustrate no longer one by one herein.
Step S42: judge whether the sun altitude of present timing point is greater than 0, if the sun altitude of present timing point is greater than 0, in then representing that this moment sun on high, carry out step S43, if the sun altitude of present timing point is not more than 0, then represent this moment sun not aloft, carry out step S44.
Step S43: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is not more than 0, then because present timing point sun altitude is greater than 0, represent that the sun carves at this moment now aerial, and last timing point sun altitude is not more than 0, mean that the previous moment sun does not occur, thus this moment be at sunrise between, need to start described single dish Solar Energy Heat Utilization System, then enter step S46; If last timing point sun altitude is greater than 0, then carry out step S47.
Step S44: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is greater than 0, then because present timing point sun altitude is not more than 0, represent the sun not aloft this moment, and last timing point sun altitude is greater than 0, represent the previous moment sun also aloft, so current time is sunset time, need to close described single dish Solar Energy Heat Utilization System, now control system exports closing control signal, start to close described single dish Solar Energy Heat Utilization System, the time starting to close can be recorded simultaneously; If last timing point sun altitude is not more than 0, then carry out step S45.
Step S45: judge whether current time is more than or equal to closedown required time with the interval time starting the shut-in time.Because the startup of system and closing not instantaneously completes, need a period of time, each timing point interlude is shorter than the time needed for each startup and closedown in this embodiment, when certain timing point needs unlatching or shutdown system, also may not complete unlatching or closing process to next timing point, therefore need to judge whether this timing point and the interval time starting to start or start the shut-in time are greater than and open required time or close required time.If current time is more than or equal to closedown required time with the interval time starting the shut-in time, then represent that system completes closedown within interval time, then control system exports control signal out of service, and system keeps run-stopping status; If current time is less than closedown required time with the interval time starting the shut-in time, then control system exports closing control signal, and system continues to perform closing motion.
Step S46: judge whether the mean wind speed of present timing point is more than or equal to maximum permission wind speed.Because it is larger to there is instantaneous wind speed when actual motion, but this larger wind speed duration is shorter, system does not need the situation of change state, so the mean wind speed of present timing point refer to present timing point before the mean value of wind speed in the scheduled time, this scheduled time can need sets itself by user according to actual motion, such as, be set as 3-7 minute.Following mean wind speed all refer to timing point before the mean value of wind speed in the scheduled time, follow-up repeat specification no longer one by one.If present timing point mean wind speed is more than or equal to maximum permission wind speed, although according to sun altitude, abovementioned steps S43 judges that current time is the sunrise moment, need to start Solar Energy Heat Utilization System, but because the mean wind speed of present timing point is more than or equal to maximum permission wind speed, then system can not start, so control system does not send the control signal of startup, Solar Energy Heat Utilization System keeps run-stopping status; If present timing point mean wind speed is not more than maximum permission wind speed, then control system exports and starts control signal, and Solar Energy Heat Utilization System starts to start, and records this time for starting start-up time.
Step S47: judge whether present timing point mean wind speed is more than or equal to maximum permission wind speed, if present timing point mean wind speed is more than or equal to maximum permission wind speed, then enter step S48, if present timing point mean wind speed is less than maximum permission wind speed, then enter step S50.
Step S48: judge whether last timing point mean wind speed is more than or equal to maximum permission wind speed, if last timing point mean wind speed is more than or equal to maximum permission wind speed, enter step S49, if last timing point mean wind speed is less than maximum permission wind speed, then represent that current time starts to occur that wind speed is greater than maximum permission wind speed, system needs to close, and control system exports closing control signal, system starts to close, and records this moment for starting the shut-in time.
Step S49: judge whether current time is more than or equal to system closing required time with the interval time starting the shut-in time, if current time is more than or equal to system closing required time with the interval time starting the shut-in time, then represent within interval time, system completes closedown, system needs to keep run-stopping status, then control system exports control signal out of service, and system keeps out of service.If current time is less than system closing required time with the interval time starting the shut-in time, then represent that system is also in closing process, then control system exports closing control signal, and system continues to close.
Step S50: judge whether last timing point mean wind speed is more than or equal to maximum permission wind speed, if whether last timing point mean wind speed is more than or equal to maximum permission wind speed, and because the mean wind speed that the result that step S47 judges is present timing point is less than maximum permission wind speed, represent that wind speed reduces to the low wind speed of present timing point from the high wind speed of last timing point, security of system, can start, then control system exports and starts control signal, system starts to start, and records this time for starting start-up time; If last timing point mean wind speed is also less than maximum permission wind speed, enter step S51.
Step S51: the startup required time whether being greater than single dish Solar Energy Heat Utilization System interval time judging current time and beginning start-up time of recording.If the startup required time being less than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then control system continues to send startup control signal, continues start up system; If the start-up time being greater than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then represent that system completes startup in interlude, this moment needs single dish Solar Energy Heat Utilization System to continue to keep normal operating condition, control system sends normally runs control signal, and system keeps normal and runs.
Refer to shown in Fig. 5, the rough schematic view of the single dish Solar Energy Heat Utilization System of its display one more embodiment of the present invention, in this embodiment, described single dish Solar Energy Heat Utilization System comprises aforementioned condenser 1 embodiment illustrated in fig. 3, receiver 2, receiver holder 3, solar tracking subsystem 4, working medium transmission 5, control system 6 and airspeedometer 7.With identical part embodiment illustrated in fig. 3, herein no longer repeat specification, be, the embodiment shown in Fig. 5 with the difference of the embodiment shown in Fig. 3, described single dish Solar Energy Heat Utilization System also comprises can the thermometer 8 of measuring receiver internal temperature.The control system of the embodiment shown in Fig. 5 receives the on-site wind speed information of system measured by airspeedometer 7, and the temperature information of receiver inside that thermometer is surveyed, control system combines the altitude of the sun angle information, temperature information and the wind speed information that calculate and controls single dish Solar Energy Heat Utilization System.Wherein thermometer 8 can be arranged at the highest position of receiver internal temperature or easily due to overheated and parts place that is that damage; According to the difference of all kinds of receiver types and the difference of heat-collecting temperature, can arrange that single thermometer or the diverse location at receiver arrange multiple thermometer, formation temperature meter bunch, to reach the object detecting the Temperature Distribution in receiver more accurately.For heat utilization systems different in other embodiments, the temperature of diverse location in heat utilization system can be measured according to actual conditions, detailed description of illustrating no longer one by one herein.
Refer to shown in Fig. 6, the flow chart of the control method of the embodiment of the of the present invention single dish Solar Energy Heat Utilization System of its display shown in Fig. 5.
Step S61: the timing point of the setting interval scheduled time, at each timing point, the central processing unit of control system calculates the sun altitude of present timing point.The scheduled time at wherein said interval can be the several seconds, such as 2-5 second, or this predetermined time also can be very shortly be similar to the continuous print time interval time, the length of described default interval time can according to the requirement free setting of the situation of system or user.The computing formula of sun altitude is in this embodiment:
wherein δ represents solar declination (i.e. the geographic latitude of subsolar point),
the on-site geographic latitude of expression system, t represents system on-site local time (hour angle), and wherein solar declination and geographic latitude are all north latitude is just, south latitude is negative.Also can adopt the method for other astronomical calculating sun altitude in other embodiments, illustrate no longer one by one herein.
Step S62: judge whether the sun altitude of present timing point is greater than 0, if the sun altitude of present timing point is greater than 0, in then representing that this moment sun on high, carry out step S63, if the sun altitude of present timing point is not more than 0, then represent this moment sun not aloft, carry out step S64.
Step S63: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is not more than 0, then because present timing point sun altitude is greater than 0, represent that the sun carves at this moment now aerial, and last timing point sun altitude is not more than 0, mean that the previous moment sun does not occur, thus this moment be at sunrise between, need to start described single dish Solar Energy Heat Utilization System, then enter step S66; If last timing point sun altitude is greater than 0, then carry out step S67.
Step S64: judge whether last timing point sun altitude is greater than 0, if last timing point sun altitude is greater than 0, then because present timing point sun altitude is not more than 0, represent the sun not aloft this moment, and last timing point sun altitude is greater than 0, represent the previous moment sun also aloft, so current time is sunset time, need to close described single dish Solar Energy Heat Utilization System, now control system exports closing control signal, start to close described single dish Solar Energy Heat Utilization System, record starts the time of closedown simultaneously; If last timing point sun altitude is not more than 0, then carry out step S65.
Step S65: judge whether current time is more than or equal to closedown required time with the interval time starting the shut-in time.Because the startup of system and closing not instantaneously completes, need a period of time, each timing point interlude may be shorter than the time needed for each startup and closedown in this embodiment, when certain timing point needs unlatching or shutdown system, also may not complete unlatching or closing process to next timing point, therefore need to judge whether this timing point and the interval time starting to start or start the shut-in time are greater than and open required time or close required time.If current time is more than or equal to closedown required time with the interval time starting the shut-in time, then represent that system completes closedown within interval time, then control system exports control signal out of service, and system keeps run-stopping status; If current time is less than closedown required time with the interval time starting the shut-in time, then control system exports closing control signal, and system continues to perform closing motion.
Step S66: judge whether present timing point mean wind speed is more than or equal to maximum permission wind speed, if present timing point mean wind speed is more than or equal to maximum permission wind speed, although according to sun altitude, abovementioned steps S63 judges that present timing point is the sunrise moment, need to start Solar Energy Heat Utilization System, but because the mean wind speed of present timing point is more than or equal to maximum permission wind speed, then system can not start, so control system does not send the control signal of startup, system keeps run-stopping status; If present timing point mean wind speed is not more than maximum permission wind speed, then control system exports and starts control signal, and system starts to start, and records this time for starting start-up time.
Step S67: judge whether present timing point mean wind speed is more than or equal to maximum permission wind speed, if present timing point mean wind speed is more than or equal to maximum permission wind speed, then enter step S68, if present timing point mean wind speed is less than maximum permission wind speed, then enter step S70.
Step S68: judge whether last timing point mean wind speed is more than or equal to maximum permission wind speed, if last timing point mean wind speed is more than or equal to maximum permission wind speed, enter step S69, if last timing point mean wind speed is less than maximum permission wind speed, then represent that current time starts to occur that wind speed is greater than maximum permission wind speed, system needs to close, and control system exports closing control signal, system starts to close, and records this moment for starting the shut-in time.
Step S69: judge whether current time is more than or equal to system closing required time with the interval time starting the shut-in time, if current time is more than or equal to system closing required time with the interval time starting the shut-in time, then represent within interval time, system completes closedown, system needs to keep run-stopping status, then control system exports control signal out of service, and system keeps out of service.If current time is less than system closing required time with the interval time starting the shut-in time, then represent that system is also in closing process, then control system exports closing control signal, and system continues to close.
Step S70: judge whether last timing point mean wind speed is more than or equal to maximum permission wind speed, if last timing point mean wind speed is more than or equal to maximum permission wind speed, and because step S67 judges that current wind speed is less than maximum permission wind speed, represent that wind speed reduces to the low wind speed of current time from the high wind speed of last timing point, security of system, can start, then control system exports and starts control signal, system starts to start, and records this time for starting start-up time; If last timing point mean wind speed is also less than maximum permission wind speed, enter step S71.
Step S71: the startup required time whether being greater than single dish Solar Energy Heat Utilization System interval time judging current time and beginning start-up time of recording.If the startup required time being less than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then control system continues to send startup control signal, continues start up system; If the start-up time being greater than single dish Solar Energy Heat Utilization System interval time of current time and beginning start-up time of recording, then represent that system completes startup in interlude, this moment needs single dish Solar Energy Heat Utilization System to continue to keep normal operating condition, control system sends normally runs control signal, and system keeps normal and runs.
Step S72: judge whether the flow of the heat transferring medium in the transmission pipeline of the working medium transmission system calculated is more than or equal to the maximum transportation flux of volume control device.When normally running, the flow of the heat exchange medium in the transmission pipeline of heat-exchange system is the specific heat according to system location beam radia amount, described heat transferring medium, the temperature of the heat transferring medium that the temperature of the heat transferring medium of described transmission pipeline entrance and transmission pipeline outlet are expected, the flow of the heat transferring medium needed for the transmission pipeline calculated, then control system is according to this calculated flow rate output flow control signal to the volume control device of working medium transmission system, reaches described calculated flow rate by the heat transferring medium in volume control device controls transfer pipeline.Because the range restriction of volume control device itself, the maximum maximum transportation flux that can only reach the restriction of volume control device range own of the flow of the heat transferring medium in transmission pipeline.When the flow calculated is very large, the maximum transportation flux of this volume control device range restriction own may not reach the value of the flow of calculating.In step S72, when the flow of the heat transferring medium in the transmission pipeline of the working medium transmission system calculated is less than the maximum transportation flux of volume control device, then control system is according to the flow output flow control signal calculated, control system exports and normally runs control signal simultaneously, and system is normally run.When the flow of the heat transferring medium in the transmission pipeline of the heat-exchange system calculated is more than or equal to the maximum transportation flux of volume control device, control system is according to the maximum transportation flux output flow control signal of volume control device range restriction own, the heat transferring medium in volume control device controls transfer pipeline is made to be the maximum transportation flux that the range of this volume control device own limits, and the flow of non-computational, then enter step S73.
Step S73: judge whether the mean temperature (being the mean temperature in receiver in one embodiment) in Solar Energy Heat Utilization System is more than or equal to the maximum temperature of permission.Because it is larger to there is transient temperature when actual motion, but this larger temperature duration is shorter, system does not need the situation of change state, so the mean temperature of present timing point refers to the mean value of temperature in certain hour before present timing point, this certain hour can need sets itself by user according to actual motion, such as, be set as 1-2 minute.If the mean temperature in receiver is more than or equal to the maximum temperature of permission, control condenser, condenser is made not face the sun but depart from certain angle with the sun, such as depart from 0.5 °-1 °, the sun, because condenser is not just to the sun, the sunshine that therefore receiver receives is not the strongest, so the temperature of receiver can be just lower to solar time temperature than condenser, thus receiver is in safe temperature range, and the state of receiver is denoted as " departing from " state.If the mean temperature in receiver is less than the maximum temperature of permission, carry out step S74.
Step S74: detect current bin state.If current bin state is " normally " state, then illustrate that this etching system is in normal operation, so control system output system normally runs control signal, system continues normal operation, and described " normally " state refers to condenser just to the sun; If current bin state is " departing from " state, enter step S75.
Step S75: whether the mean temperature detecting receiver present timing point is less than default recurrence temperature.If the mean temperature of receiver present timing point is less than default recurrence temperature, then control optically focused dish and make it to face the sun, and receiver state is denoted as " normally " state, system enters normal operating condition.If the mean temperature of receiver present timing point is greater than default recurrence temperature, then maintain existing duty, namely concentrator departs from the operation of sun certain angle.Wherein this recurrence temperature is the temperature value that a default temperature is lower than maximum allowable temperature.
Refer to shown in Fig. 7, in the single dish Solar Energy Heat Utilization System of its display one embodiment of the present of invention, the flow chart of the method for heat transferring medium flow in controlled medium transmission system.When normally running, the flow of the heat exchange medium in the transmission pipeline of working medium transmission system is the specific heat according to system location beam radia amount, described heat transferring medium, the temperature of the heat transferring medium that the temperature of the heat transferring medium of described transmission pipeline entrance and transmission pipeline outlet are expected, the flow of the heat transferring medium needed for the transmission pipeline calculated, then control system is according to this calculated flow rate output flow control signal to the volume control device of heat-exchange system, reaches described calculated flow rate by the heat transferring medium in volume control device controls transfer pipeline.On the one hand; system is when normally running; although the flow value sometimes calculated can be smaller; if but during actual motion; if the heat transferring medium flow in heat-exchange system transmission pipeline is too small, then may occur hot-spot phenomenon, institute thinks protection system; must set the minimum permissible flow of heat transferring medium, the flow of the heat transferring medium in working medium transmission system transmission pipeline can not lower than this minimum permissible flow.On the other hand, because the range restriction of volume control device itself, the maximum maximum transportation flux that can only reach the restriction of volume control device range own of the flow of the heat transferring medium in transmission pipeline.When the flow calculated is very large, the maximum transportation flux of this volume control device range restriction own may not reach the value of the flow of calculating.When the flow of the heat transferring medium in the transmission pipeline of the working medium transmission system calculated is more than or equal to the maximum transportation flux of volume control device, control system is according to the maximum transportation flux output flow control signal of volume control device range restriction own, the heat transferring medium in volume control device controls transfer pipeline is made to be the maximum transportation flux that the range of this volume control device own limits, and the flow of non-computational.
Because the control of the flow of this heat transferring medium can be carry out between any step in the method shown in earlier figures 2, Fig. 4 or Fig. 6 or carry out simultaneously, can be such as in the embodiment shown in Fig. 2, Fig. 4 or Fig. 6, judged sun altitude after carry out or carry out simultaneously, also can be in the embodiment shown in earlier figures 4 or Fig. 6, judged wind speed after carry out or carry out simultaneously, also carry out after can being judgement temperature in the embodiment shown in fig. 6 or carry out simultaneously, illustrating no longer one by one herein.In described control heat-exchange system, the method for heat transferring medium flow comprises the steps:
Step S100: start
Step S101: according to the specific heat of system location beam radia amount, described heat transferring medium, the flow of heat transferring medium required in transmission pipeline in the temperature computation heat-exchange system of the heat transferring medium that the temperature of the heat transferring medium of described transmission pipeline entrance and transmission pipeline outlet are expected, is referred to as the calculated flow rate of heat transferring medium;
Step S102: judge whether described calculated flow rate is greater than the minimum permissible flow of system cloud gray model, if, then carry out step S103, if not, then control system exports minimum permissible flow control signal to volume control device, and the heat transferring medium flow in volume control device controls transfer pipeline is minimum permissible flow;
Step S103: judge whether described calculated flow rate is greater than the maximum permissible flow of volume control device, if, then control system exports maximum permissible flow control signal to volume control device, and the heat transferring medium flow in volume control device controls transfer pipeline is maximum permissible flow; If not, then control system exports control signal to volume control device, and the heat transferring medium flow in volume control device controls transfer pipeline is described calculated flow rate.
Refer to shown in Fig. 8, the rough schematic view of the Solar Energy Heat Utilization System be made up of multiple optically focused dish of its display one embodiment of the present of invention, as shown in Figure 8, the Solar Energy Heat Utilization System of one embodiment of the present of invention can comprise multiple optically focused dish 9 and control the control system 6 of each optically focused dish 9, and each optically focused dish 9 comprises aforesaid condenser 1, receiver 2, support 3, solar tracking subsystem 4 and heat-exchange system 5 respectively.Described each optically focused dish 9 is controlled according to aforesaid control method automatically by control system 6, repeats no more herein.
In aforementioned several embodiment, described control system is carry out Systematical control according to sun altitude respectively, or control according to sun altitude and local wind speed, control again or according to sun altitude, local wind speed and receiver internal temperature, can also be only control according to sun altitude and receiver internal temperature in other embodiments, or aforementioned several basis for estimation can there is no sequencing, any combination design.
Disc type solar energy heat utilization system of the present invention, Automatic Control can be carried out to Solar Energy Heat Utilization System, make it to meet round-the-clock Various Complex operating mode, such as, automatic operation under operating modes such as starting, close, wind speed is too large, receiver temperature is too high or flow is excessive, ensures the security of each parts of system and the reliability of whole Solar Energy Heat Utilization System while the maximum heat-collecting capacity of the system of acquisition.
It should be noted that: above embodiment is only for illustration of the present invention and unrestricted technical scheme described in the invention, although this description reference the above embodiments are to present invention has been detailed description, but, those of ordinary skill in the art is to be understood that, person of ordinary skill in the field still can modify to the present invention or equivalent replacement, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, all should be encompassed in right of the present invention.
Claims (10)
1. a control method for disc type solar energy heat utilization system, comprising:
The timing point of setting predetermined time interval, at the on-site sun altitude of each timing point computing system;
When present timing point sun altitude is greater than predetermined angle, and when last timing point sun altitude is less than or equal to predetermined angle, start to start described disc type solar energy heat utilization system;
When present timing point sun altitude is less than or equal to predetermined angle, and when last timing point sun altitude is greater than predetermined angle, start to close described disc type solar energy heat utilization system.
2. the control method of disc type solar energy heat utilization system as claimed in claim 1, is characterized in that: described predetermined angle is zero degree.
3. the control method of disc type solar energy heat utilization system as claimed in claim 1 or 2, described disc type solar energy heat utilization system comprises the wind speed measuring device gathering wind speed, described method also comprises and utilizes described wind speed measuring device to gather the on-site wind speed of described disc type solar energy heat utilization system, mean wind speed before the more described timing point of each timing point in the scheduled time and preset security wind speed, when mean wind speed described in present timing point is less than described preset security wind speed, when described in last timing point, mean wind speed is more than or equal to described survival wind speed, start to start described disc type solar energy heat utilization system, when mean wind speed described in present timing point is more than or equal to described preset security wind speed, mean wind speed described in last timing point is less than described preset security wind speed, starts to close described disc type solar energy heat utilization system.
4. the control method of the disc type solar energy heat utilization system as described in claim 1 or 2 or 3, described disc type solar energy heat utilization system comprises the thermometer of collecting temperature, described method also comprises the temperature utilized in described thermometer collection disc type solar energy heat utilization system, mean temperature before the more described timing point of described timing point in the scheduled time in Solar Energy Heat Utilization System and preset security temperature, when mean temperature described in present timing point is greater than described preset security temperature, control condenser and depart from the operation of sun predetermined angular, and record current bin for departing from state, when mean temperature described in present timing point is less than described preset security temperature, check that whether receiver state is for departing from state, if receiver state is normal condition, system keeps normal and runs, if receiver state is for departing from state, judge whether the mean temperature in present timing point Solar Energy Heat Utilization System is less than default recurrence temperature, if the mean temperature in present timing point Solar Energy Heat Utilization System is less than to preset return temperature, control condenser just to the sun, System recover normally runs, and record identifier receiver is normal condition, if the mean temperature in present timing point Solar Energy Heat Utilization System is more than or equal to preset return temperature, control system continues to keep condenser to depart from sun predetermined angular running status, and the temperature value of wherein said default recurrence temperature is lower than the temperature value of preset security temperature.
5. the control method of disc type solar energy heat utilization system as claimed in claim 4, described temperature counts at least two thermometers, the temperature of the different parts in the disc type solar energy heat utilization system of the temperature in described thermometer collection disc type solar energy heat utilization system measured by least two thermometers, described preset security temperature is the preset security temperature of corresponding described different parts.
6. the control method of the disc type solar energy heat utilization system as described in any one of claim 1-5, when starting to start described disc type solar energy heat utilization system, record the time of present timing point for starting start-up time simultaneously, when next timing point, judge whether next timing point is greater than the startup required time of described disc type solar energy heat utilization system apart from the described time interval starting start-up time, when next timing point described is less than the startup required time of described disc type solar energy heat utilization system apart from the described time interval starting start-up time, then continue to open described disc type solar energy heat utilization system, when next timing point described is greater than the startup required time of described disc type solar energy heat utilization system apart from the described time starting start-up time, then keeping system is normally run, and wherein said startup required time normally runs institute's interlude for system starts startup to system, or when starting to close described disc type solar energy heat utilization system, record the time of present timing point for starting the shut-in time simultaneously, when next timing point, judge whether next timing point is greater than the closedown required time of described disc type solar energy heat utilization system apart from the time interval of described beginning shut-in time, when next timing point described is less than the closedown required time of described disc type solar energy heat utilization system apart from the time interval of described beginning shut-in time, then close described disc type solar energy heat utilization system, when next timing point described is apart from the closedown required time interval greater than described disc type solar energy heat utilization system of described beginning shut-in time, then keeping system is out of service, and wherein said closedown required time starts the system that closes to institute out of service interlude for system.
7. the control method of the disc type solar energy heat utilization system as described in any one of claim 1-6, wherein said disc type solar energy heat utilization system also comprises heat-exchange system, the volume control device that described heat-exchange system comprises heat transferring medium transmission pipeline and is arranged on transmission pipeline, heat transferring medium enters the receiver of Solar Energy Heat Utilization System by described transmission pipeline, and carry out heat exchange with heat-absorbing material wherein, described control method also comprises according to the on-site beam radia amount of described disc type solar energy heat utilization system, the specific heat of described heat transferring medium, the temperature computation heat transferring medium flow of the heat transferring medium that the temperature of described receiver porch heat transferring medium and receiver exit are expected, by volume control device according to the heat transferring medium flow in the heat transferring medium flow controls transfer pipeline of described calculating, the minimum permissible flow of described heat transferring medium when initialization system runs, when minimum permissible flow lower than this system cloud gray model of the heat transferring medium flow of described calculating, heat transferring medium flow in transmission pipeline is controlled the minimum permissible flow for described setting by volume control device, when the heat transferring medium flow of described calculating is greater than the maximum permissible flow of described volume control device, heat transferring medium flow in transmission pipeline is controlled the maximum permissible flow for described volume control device by volume control device.
8. the control method of the disc type solar energy heat utilization system as described in any one of claim 1-7, it comprises the position of sun calculating present timing point further, position of sun according to present timing point drives the step of condenser to precalculated position of disc type solar energy heat utilization system, described step comprises: the elevation angle and the azimuth that accurately calculate each moment sun every day in advance according to the on-site geographical position of Solar Energy Heat Utilization System, by these information storage calculated in control system, at present timing point, control system is according to the elevation angle of the sun of stored current time and azimuth information, exporting control signal makes the minute surface of optically focused dish just to the sun, or system gathers position of sun information by one group of sensor, and the difference of the information gathered by these sensors of comparative analysis, to determine the error of the relative sun image of optically focused dish, the position then adjusting condenser makes the minute surface of condenser just to the sun.
9. a disc type solar energy heat utilization system, it comprises optically focused dish and control system;
Described optically focused dish comprise collect sunshine condenser, receive condenser reflection ray and solar energy be converted into heat receiver, support fixing described receiver support and drive described condenser to follow the tracks of the solar tracking subsystem of the sun;
Described control system adopts the output of the method described in aforementioned any one of claim 1-8 control signal to control the operation of described disc type solar energy heat utilization system.
10. disc type solar energy heat utilization system as claimed in claim 9, it is characterized in that: described control system is according to the solar azimuth calculated and elevation angle, export control signal and control the operation of described solar tracking subsystem, described solar tracking subsystem drives described condenser just to the sun or depart from the sun.
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