CN105509347A - Intelligent control method of solar system - Google Patents
Intelligent control method of solar system Download PDFInfo
- Publication number
- CN105509347A CN105509347A CN201610004318.6A CN201610004318A CN105509347A CN 105509347 A CN105509347 A CN 105509347A CN 201610004318 A CN201610004318 A CN 201610004318A CN 105509347 A CN105509347 A CN 105509347A
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- Prior art keywords
- water
- water tank
- central controller
- valve
- temperature sensor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S2010/71—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the conduits having a non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
- F24S2010/751—Special fins
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Abstract
The invention provides an intelligent control method of a solar system. The solar system comprises a heat collection device, wherein the heat collection device comprises a heat collection tube and a water tank; the heat collection tube comprises a heat absorption end and a heat release end; the heat release end is arranged in the water tank; a temperature sensor and a water level gauge are arranged in the water tank; an inlet tube and an outlet tube of the water tank are respectively provided with an inlet tube valve and an outlet tube valve; the temperature sensor, water level gauge, inlet tube valve and outlet tube valve are connected with a central control unit through data; and if the temperature of water in the water tank measured by the temperature sensor is lower than the lower limit, the central control unit automatically controls the opening and closing of the inlet tube valve and outlet tube valve according to the water level measured by the monitoring water level gauge. The water level and temperature in the water tank are automatically controlled, thereby preventing the water level from being too high or too low on the premise of satisfying the requirements for water temperature, thereby enhancing the use intelligentization of the heat collection device.
Description
Technical field
The invention belongs to field of solar energy, particularly relate to a kind of solar energy collector system of Based Intelligent Control.
Background technology
Along with the high speed development of modern social economy, the demand of the mankind to the energy is increasing.But the traditional energy storage levels such as coal, oil, natural gas constantly reduce, day by day in short supply, cause rising steadily of price, simultaneously the problem of environmental pollution that causes of conventional fossil fuel is also further serious, and these limit the development of society and the raising of human life quality all greatly.One of energy problem's most distinct issues having become contemporary world.Thus seek the new energy, particularly free of contamination clean energy resource has become the focus of present people research.
Solar energy is a kind of inexhaustible clean energy resource, and stock number is huge, and the solar radiant energy total amount that earth surface is received every year is 1 × 10
18kWh, for world's year consumes more than 10,000 times of gross energy.Countries in the world are all using as new energy development important one of the utilization of solar energy, and the Chinese government also clearly proposes to want develop actively new forms of energy at Report on the Work of the Government already, and wherein the utilization of solar energy is especially in occupation of prominent position.But arrive tellurian energy density little (about a kilowatt every square metre) due to solar radiation, and be again discontinuous, this brings certain difficulty to large-scale exploitation.Therefore, in order to extensively utilize solar energy, not only want the problem on technical solution, and must be able to compete mutually with conventional energy resource economically.
The automaticity of current solar thermal collector is not high, although prior art is also studied the Based Intelligent Control of solar energy, but the Intelligent Control Research for heat collector is not a lot, for the problems referred to above, the invention provides a kind of solar energy collector system of new Based Intelligent Control, thus the Based Intelligent Control in Solar use process.
Summary of the invention
The invention provides a kind of new solar energy collector system, thus solve the technical problem occurred above.
To achieve these goals, technical scheme of the present invention is as follows:
An intelligent control method for solar energy system, described solar energy system comprises heat collector, and described heat collector comprises thermal-collecting tube and water tank, and described thermal-collecting tube comprises heat absorbing end and release end of heat, and described release end of heat is arranged in water tank; Set temperature sensor, water-level gauge in water tank, the inlet tube of water tank and outlet distinguish inlet porting tube valve and outlet valve, described temperature sensor, water-level gauge, inlet tube valve and outlet valve and central controller data cube computation; It is characterized in that: if the temperature of the water in temperature sensor measurement water tank is lower than the numerical value of lower limit, now central controller controls the opening and closing of inlet tube valve and outlet valve automatically according to the water level that the water-level gauge of monitoring is measured.
As preferably, described method comprises the steps:
The water level of the water-level gauge measurement of central controller monitoring is higher than lower limit and lower than higher limit, then central controller controls inlet tube valve and outlet valve are closed automatically;
The water level of the water-level gauge measurement of central controller monitoring is lower than lower limit, then central controller controls outlet valve is closed automatically, inlet tube valve continues to open, thus ensure that water continues to flow in water tank, the water level measured when the water-level gauge of central controller monitoring equals or higher than lower limit, then central controller controls inlet tube valve is closed automatically;
The water level of the water-level gauge measurement of central controller monitoring is higher than higher limit, then central controller controls outlet valve continues to open, inlet tube valve is closed automatically, thus ensure that water continues to flow out water tank, the water level measured when the water-level gauge of central controller monitoring is equal to or less than higher limit, then central controller controls valve is closed automatically.
As preferably, in described water tank, multiple temperature sensor is set, is measured the temperature of water by multiple temperature sensor.
As preferably, central controller controls the aperture of inlet tube valve and outlet valve by the mean value of the temperature of the water of multiple temperature sensor measurement.
As preferably, central controller controls the aperture of inlet tube valve and outlet valve by the minimum of the temperature of the water of multiple temperature sensor measurement.
As preferably, at least one temperature sensor is arranged on the position near tank entry pipe in water tank.
As preferably, at least one temperature sensor is arranged on the position near vessel outlet in water tank.
As preferably, described thermal-collecting tube comprises flat tube and fin, described flat tube comprises tube wall parallel to each other and sidewall, described sidewall connects the end of parallel tube wall, fluid passage is formed between described sidewall and described parallel tube wall, described thermal-collecting tube release end of heat comprises fin, described fin is arranged between tube wall, described fin comprises the sloping portion favouring tube wall, described sloping portion connects with parallel tube wall, described sloping portion is by the multiple passage aisle of spaced for fluid passage formation, adjacent sloping portion connects on tube wall, triangle is formed between described adjacent sloping portion and tube wall, sloping portion arranges intercommunicating pore, thus adjacent passage aisle is communicated with each other, intercommunicating pore is isosceles triangle, and the triangle formed between described adjacent sloping portion and tube wall is isosceles triangle.
As preferably, the drift angle of the isosceles triangle of intercommunicating pore is B, and the drift angle of the isosceles triangle formed between adjacent sloping portion and tube wall is A, then meet following formula:
Sin(B)=a+b*sin(A/2)-c*sin(A/2)
2；
Wherein a, b, c are parameters, wherein 0.559<a<0.565,1.645<b<1.753,1.778<c<1.883;
60°<A<160°；35°<B<90°。
A kind of solar energy system, comprises control method described above.
Compared with prior art, solar energy collector system of the present invention has following advantage:
1) the present invention is by the detection to the temperature of the water of radiator drain, by the size of the aperture of by-pass valve control, thus ensures that the water of the output in water tank reaches steady temperature.
2) the present invention is by the leaving water temperature of monitoring water tank, thus ensures that water temperature is constant by controlling flow.
3) the present invention controls the water level in water tank automatically, thus improves the intellectuality of the use of heat collector.
4) the present invention have studied new collector structure, and by a large amount of experiments, determines the physical dimension of best flat thermal-collecting tube, thus when making to ensure heat exchange resistance, makes heat transfer effect reach best.
Accompanying drawing explanation
Fig. 1 is solar energy collector system control structure schematic diagram;
Fig. 2 is solar thermal collector cross section structure schematic diagram of the present invention;
Fig. 3 is thermal-collecting tube cross-sectional structure schematic diagram of the present invention;
Fig. 4 is the cross section structural representation that the present invention's thermal-collecting tube inner rib plate arranges lead to the hole site place;
Fig. 5 is the schematic diagram that the present invention arranges through-hole structure sloping portion plane;
Fig. 6 is another schematic diagram that the present invention arranges through-hole structure sloping portion plane;
Fig. 7 is triangle through hole structural representation of the present invention;
Fig. 8 is the cross sectional representation of thermal-collecting tube heat absorbing part of the present invention;
Fig. 9 is the cross sectional representation of the preferred thermal-collecting tube heat absorbing part of the present invention;
Figure 10 embodiment one valve opening and closing control flow;
Figure 11 embodiment two valve opening adjustment flow chart.
Figure 12 is embodiment three valve opening adjustment flow chart;
Figure 13 is embodiment four water level adjustment flow chart.
Reference numeral is as follows:
1 thermal-collecting tube, 2 fluid passages, 3 tube walls, 4 sloping portions, 5 summits, 6 intercommunicating pores, 7 fins, 8 water tanks, 9 heat absorbing end, 10 release end of heat, 11 base plates, 12 absorption films, 13 glass plates, 14 thermal insulation layers, 15 inner rib plates, 16 storage heaters, 17 vessel outlet, 18 tank entry pipes, 19 outlet pipe temp sensors, 20 outlet valves, 21 central controllers, 22 inlet tube valves, 23 inlet tube valves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Herein, if do not have specified otherwise, relate to formula, "/" represents division, "×", " * " represent multiplication.
A kind of solar thermal collection system, as shown in Figure 1-2, described system comprises heat collector, storage heater 16, and described heat collector comprises thermal-collecting tube 1 and water tank 8, and described thermal-collecting tube 1 comprises heat absorbing end 9 and release end of heat 10, and described release end of heat 10 is arranged in water tank 8.Heat absorbing end 9 absorbs solar energy, is transferred heat to the water in water tank by release end of heat 10.Described water tank 8 is communicated with storage heater 16 and forms closed circuit, thermal-collecting tube 1 absorbs solar energy, water in heating water tank 8, water after heating enters storage heater 16 by vessel outlet 17, heat exchange is carried out in storage heater 16, by heat storage in the heat-storing material of storage heater 16, the water flowed out in storage heater 16 enters in water tank 8 at tank entry pipe 18 and heats.
Described solar thermal collector also comprises transparency glass plate 13, thermal insulation layer 14, absorption film 12.Absorption film 12 is arranged on (namely towards the one side of the sun) above thermal-collecting tube 1 heat absorbing end 9, and transparency glass plate 13 covers the front of the heat absorbing end 9 of thermal-collecting tube, leaves thermal insulation layer 17 between heat absorbing end 9 and transparency glass plate 16, and as preferably, thermal insulation layer is vacuum layer.Safety glass, thermal insulation layer is adopted to be vacuum layer as preferably clear glass plate 16; As preferably, absorption film 12 is arranged on the front of heat pipe 1 heat absorbing end 9 by the mode of sputtering.
Base plate 11 is arranged on thermal-collecting tube 1 bottom, and described base plate is insulation material.
As preferably, the thickness of thermal insulation layer 17 is 18mm ~ 25mm; As being preferably 21mm.
As shown in Figure 3, at release end of heat 10, described thermal-collecting tube comprises flat tube 1 and fin 7, described flat tube 1 comprises tube wall 3 parallel to each other and sidewall 12, described sidewall 12 connects the end of parallel tube wall 2, fluid passage 2 is formed between described sidewall 12 and described parallel tube wall 3, described fin 7 is arranged between tube wall 3, described fin 7 comprises the sloping portion 4 favouring tube wall, described sloping portion 4 connects with parallel tube wall 3, described sloping portion 4 is by multiple for spaced for fluid passage 2 formation passage aisle 10, adjacent sloping portion 4 connects on tube wall, triangle is formed between described adjacent sloping portion 4 and tube wall 3, sloping portion 4 arranges intercommunicating pore 6, thus adjacent passage aisle 10 is communicated with each other.
By arranging intercommunicating pore 6, ensure the connection between adjacent passage aisle 10, thus the fluid in the passage aisle making pressure large can flow in the passage aisle little to contiguous pressure, solve the problem that internal pressure is uneven and local pressure is excessive when flat tube heat exchange, thus facilitate the abundant flowing of fluid in heat exchanger channels, improve heat exchange efficiency, also improve the service life of thermal-collecting tube simultaneously.
As preferably, along the centre centre position of tube wall 3 (namely in Fig. 3 cross sectional representation) of the tube wall 3 of flat tube cross section, to both sides sidewall 12 direction, described through hole 6 area on different sloping portion 4 constantly diminishes.Wherein, be positioned at the centre position of flat tube 1, i.e. the centre position of tube wall 3 in Fig. 2 cross sectional representation, the area of through hole 6 is maximum.Main cause found through experiments, because fluid maldistribution, intermediate pressure is maximum, reduces gradually from centre to pressure at both sides.Therefore the distribution of via area, the fluid at middle part is flowed to both sides as far as possible, reduce the flow resistance at middle part, cause the minimizing of heat exchange area in order to avoid perforated area is excessive simultaneously, perforated area is changed according to pressure, while reduction resistance, improve heat exchange efficiency further.
As preferably, along the centre of flat tube cross section to sidewall 12 direction, the amplitude that described through hole 6 area on different sloping portion 4 constantly diminishes is increasing.By setting like this, be also the Changing Pattern meeting flowing pressure, while reducing flow resistance further, improve heat exchange efficiency.
As preferably, the shape of described intercommunicating pore 6 is isosceles triangle, and the mid point on the base of described isosceles triangle is identical with the flow direction of fluid to the direction of drift angle.That is, the drift angle direction of isosceles triangle is fluid flow direction.Found through experiments, drift angle direction is set to be consistent with flow direction, can heat exchange efficiency be improved, reduce flow resistance simultaneously.By setting like this, the heat exchange efficiency of about 10% can be improved, reduce the resistance of about 9% simultaneously.
As preferably, forming triangle between described adjacent sloping portion and tube wall is isosceles triangle, is called for short the second isosceles triangle later.By being set to isosceles triangle, fluid flowing can being ensured evenly, improving heat transfer effect.
As preferably, described sloping portion summit 5 is plane, and the summit 5 of described two adjacent sloping portions 4 is connected, and described summit 5 is connected with tube wall 3.Because arrange fixed point 5 for plane, therefore make sloping portion 4 large with tube wall contact area, thus tube wall and sloping portion are more fully better contacted.Installation is more prone to, avoids sliding.
As preferably, form in triangle between adjacent sloping portion 4 and tube wall, the tie point of the inner surface that sloping portion 4 is relative forms vertex of a triangle, and described vertex of a triangle is positioned on tube wall.
As shown in Figure 7, the drift angle of described isosceles triangle is B, and as Fig. 5, shown in 6, along the flow direction of fluid, same sloping portion 4 arranges many row's triangle through hole 6.As shown in Figure 6, many exhausting holes 6 are shifted structure.
Find in an experiment, the area of through hole can not be excessive, excessive words can cause the loss of heat exchange area, reduce heat exchange efficiency, too small, cause local pressure to distribute still uneven, in like manner, the distance of adjacent tube wall 3 can not be excessive, and cross the reduction that conference causes heat exchange efficiency, too small meeting causes flow resistance excessive.Experimentally find, the drift angle of the first isosceles triangle and the drift angle of the second isosceles triangle are the change of certain rule, such as the second isosceles triangle drift angle becomes large, thus cause the passage aisle area of heat exchanger channels to increase, corresponding flow resistance diminishes, and therefore now the circulation area of the second isosceles triangle will diminish, and can reduce the area of through hole 6 like this, when ensureing flow resistance, improve heat exchange efficiency simultaneously.Therefore there is following relation between the first isosceles triangle and the second isosceles triangle drift angle:
The drift angle of the first isosceles triangle is B, and the drift angle of the second isosceles triangle is A, then meet following formula:
Sin(B)=a+b*sin(A/2)-c*sin(A/2)
2；
Wherein a, b, c are parameters, wherein 0.559<a<0.565,1.645<b<1.753,1.778<c<1.883;
60°<A<160°；35°<B<90°。
As preferably, a=0.5631, b=1.6948, c=1.8432;
80°<A<120°；50°<B<60°；
By above-mentioned formula, the best relation between the first isosceles triangle and the second isosceles triangle drift angle can being determined, can ensureing when meeting flow resistance under this relation, reach best heat exchange efficiency.
As preferably, H=7-18mm.Be further used as preferably, 10<H<11mm.
As preferably, the length on the first isosceles triangle base is h, meets following formula:
0.28<d*(h/H) <0.36; Wherein d is parameter, 0.7<d<2.0;
H be with the relative face of adjacent tube wall between distance.
As preferably, 1.0<d<1.4.
As preferably, along with drift angle is the increase of A, described d diminishes.
As preferably, along with the increase of H, described d diminishes.
The width of tube wall is W, is preferably 7.4>W/H>4.6, further preferably, and 6.8>W/H>5.6.
One by above-mentioned optimal design, can improve the heat exchange property of thermal-collecting tube further, reduce flow resistance simultaneously.
For the situation that the drift angle A of sloping portion formation is different, such as along the middle part of tube wall to the sidewall direction of both sides, the situation that the included angle A that described adjacent sloping portion is formed is more and more less, the mean value of two drift angles that the A in formula above takes sloping portion adjacent calculates.
The present invention is thousands of numerical simulations by the thermal-collecting tube of multiple different size and test data, meeting in industrial requirements pressure-bearing situation (below 10MPa), when realizing maximum heat exchange amount, the dimensionally-optimised relation of the flat tube tube wall of the best summed up.
As preferably, the base of the adjacent isosceles triangle through hole of described same row all on one wire, the through hole distance that same row is adjacent is S1, described 2.9 × h<S1<3.3 × h, wherein S1 is with the distance of the mid point on the base of adjacent two isosceles triangle through holes.Be preferably 3.2 × h=S1.
As preferably, the base of the isosceles triangle of the through hole of adjacent row is parallel to each other, and the summit of isosceles triangle is L to the distance of base mid point, and the distance S2 of adjacent row is 3.8*L<S2<4.8*L.Be preferably S2=4.4*L
When the base of the isosceles triangle of adjacent row is different, take the weighted average on two bases to calculate.
As preferably, the angle of the isosceles triangle of same row is identical with base.Namely shape is identical, is equal shape.
For formula above, for the through hole that front and rear row size is different, be also still suitable for.
As preferably, the wall thickness of fin is 0.5-0.9mm; As preferably, 0.6-0.7mm.
For the concrete dimensional parameters do not mentioned, design according to normal heat exchanger.
Described fin 7 is only arranged on release end of heat 10.
As preferably, as Fig. 8, shown in 9, heat absorbing end 9 inwall of thermal-collecting tube 1 arranges inner rib plate 15.
As preferably, described inner rib plate 15 is straight tabular, the bearing of trend of inner rib plate 15 along fluid evaporator flow direction, namely along heat absorbing end 9 to release end of heat direction, moving axially in other words along thermal-collecting tube heat absorbing end 9.By setting like this, the flow direction of fluid space and the fluid formed between inner rib plate is consistent, thus reduces flow resistance, also increase strengthening heat absorption simultaneously.
As preferably, along heat absorbing end 9 to release end of heat direction, inner rib plate 15 highly constantly increases, and the amplitude highly increased is increasing.By increasing inner rib plate 15 height, thus increase the heat exchange area of inner rib plate 15.Experiment finds, by setting like this, compared with identical with fin height, can improve the heat exchange efficiency of about 7%.
As preferably, as shown in Figure 9, along the centre of thermal-collecting tube 1 heat absorbing end 10 cross section to both sides, the height of described inner rib plate 15 constantly reduces.Wherein, be positioned at the centre position of thermal-collecting tube 1 heat absorbing end 10, the height of inner rib plate 15 is the highest.
Because found by test, thermal-collecting tube heat absorbing end in middle part heat absorption at most, from middle part to both sides, heat absorption diminishes gradually, therefore by arranging inner rib plate 15 height change of thermal-collecting tube, make the endotherm area of thermal-collecting tube heat absorbing end maximum at middle part like this, minimum in both sides, make middle part heat absorption capacity maximum, meet the heat absorption rule of thermal-collecting tube heat absorbing end heat like this, make thermal-collecting tube heat absorbing end heat absorption on the whole evenly, avoid thermal-collecting tube heat absorbing end local temperature overheated, cause radiating effect excessively poor, cause the shortening in thermal-collecting tube heat absorbing end life-span.
By above-mentioned setting, middle part flow resistance can be made to become large, and more fluid distributes to heat absorbing end both sides, fluid is distributed more even.
As preferably, from centre to both sides, the amplitude that the height of described inner rib plate 15 reduces constantly increases.
By above-mentioned setting, be also the heat absorption rule meeting thermal-collecting tube heat absorbing end, improve the heat absorption efficiency of thermal-collecting tube heat absorbing end further, ensure the entirety heat absorption of thermal-collecting tube heat absorbing end evenly, homogeneous temperature, increases the life-span of thermal-collecting tube.
As preferably, described thermal-collecting tube is gravity assisted heat pipe.
Described inner rib plate 15 material is aluminium.
Another main purpose of the present invention is the intelligentized control method realizing solar heat-preservation system, and the present invention realizes technique effect of the present invention by multiple embodiment below.
1. embodiment one
As an improvement, set temperature sensor in described water tank 8, for measuring the temperature of the water in water tank 8.The inlet tube 18 of water tank 8 and outlet 17 distinguish inlet porting tube valve 22 and outlet valve 20, described temperature sensor, inlet tube valve 22 and outlet valve 20 and central controller 21 data cube computation.Central controller 21 controls the opening and closing of inlet tube valve 22 and outlet valve 20 and the size of aperture according to the temperature of temperature sensor measurement.
If the temperature of the water in temperature sensor measurement water tank 8 is lower than the numerical value of lower limit, then central controller 21 by-pass valve control 20,22 is closed automatically, thus ensures that the water in water tank 8 continues heat temperature raising; If the temperature of the water in the water tank 8 measured exceedes the numerical value of the upper limit, then central controller 21 by-pass valve control 20,22 is opened automatically.By above-mentioned measure, can and ensure that the temperature of the water that water tank 8 exports keeps uniform temperature, thus can reach utilizable temperature.
As preferably, in described water tank 8, multiple temperature sensor is set, is measured the temperature of water by multiple temperature sensor.
As preferably, central controller 21 carrys out the opening and closing of by-pass valve control 20,22 by the mean value of the temperature of the water of multiple temperature sensor measurement.
As preferably, central controller 21 carrys out the opening and closing of by-pass valve control 20,22 by the minimum of the temperature of the water of multiple temperature sensor measurement.By taking minimum, can ensure that the temperature of the water of all positions in water tank 8 can both reach utilizable temperature.
As preferably, at least one described temperature sensor is arranged on the position near tank entry pipe 18 in water tank 8.
As preferably, at least one described temperature sensor is arranged on the position near vessel outlet 17 in water tank 8.
2. embodiment two
As an improvement, by the size of the aperture of by-pass valve control 20,22, described central controller 21 ensures that the leaving water temperature in water tank reaches steady state value.Namely the temperature by regulating the flow said entering water tank 8 and leave water tank 8 to adjust the water outlet of water tank 8.
Described tank outlet pipeline 17 arranges outlet temperature sensor 19, described outlet temperature sensor 19 and central controller 21 data cube computation, central controller 21 controls the opening and closing of inlet tube valve 22 and outlet valve 20 and the size of aperture according to the temperature that temperature sensor 19 is measured.
If the temperature of the water of the outlet 19 that temperature sensor 19 is measured is lower than the numerical value of lower limit, then the aperture of central controller 21 by-pass valve control 20 increases, reduce the aperture of valve 22, thus the water entered in water tank 8 is reduced, the water left in water tank 8 is increased, thus makes the discharge reduction in water tank 8.Improved the temperature of water in water tank 8 by the minimizing of the water yield, thus improve the outlet temperature of water tank 8.On the contrary, the temperature of the water of the outlet 19 that temperature sensor 19 is measured is higher than the numerical value of the upper limit, then the aperture of central controller 21 by-pass valve control 20 reduces, increase the aperture of valve 22, thus the water entered in water tank 8 is increased, the water left in water tank 8 is reduced, thus the water yield in water tank 8 is increased.Reduced the temperature of water in water tank 8 by the increase of the water yield, thus reduce the outlet temperature of water tank 8.By above-mentioned measure, can and ensure that the temperature of the water that water tank 8 exports keeps within the specific limits, thus can reach utilizable temperature.
As preferably, described outlet 17 arranges multiple temperature sensor 19, is measured the temperature of the water of radiator drain by multiple temperature sensor 19.
As preferably, the mean value of the temperature of the water that central controller 21 is measured by multiple temperature sensor 19 carrys out the size of the aperture of by-pass valve control 20,22.
As preferably, the minimum of the temperature of the water that central controller 21 is measured by multiple temperature sensor 19 carrys out the aperture of by-pass valve control 20,22.By taking minimum, can the further accuracy of data.
As preferably, at least one described temperature sensor is arranged on the position of outlet 17 near water tank 18.
As preferably, it is 5-10 degree Celsius that limit value deducts lower numerical limit, is preferably 6-8 degree Celsius.
3. embodiment three
As the further improvement of embodiment two, carried out the opening and closing of by-pass valve control 20,22 by the temperature measuring water in water tank 8.
If the temperature of the water of the water tank 8 that temperature sensor 19 is measured is lower than the numerical value of lower limit, then the aperture of central controller 21 by-pass valve control 20 increases, reduce the aperture of valve 22, thus the water entered in water tank 8 is reduced, the water left in water tank 8 is increased, thus makes the discharge reduction in water tank 8.Improved the temperature of water in water tank 8 by the minimizing of the water yield, thus improve the outlet temperature of water tank 8.On the contrary, the temperature of the water in the water tank 8 that temperature sensor 19 is measured is higher than the numerical value of the upper limit, then the aperture of central controller 21 by-pass valve control 20 reduces, increase the aperture of valve 22, thus the water entered in water tank 8 is increased, the water left in water tank 8 is reduced, thus the water yield in water tank 8 is increased.Reduced the temperature of water in water tank 8 by the increase of the water yield, thus reduce the outlet temperature of water tank 8.By above-mentioned measure, can and ensure that the temperature of the water that water tank 8 exports keeps within the specific limits, thus can reach utilizable temperature.
As preferably, in described water tank 8, multiple temperature sensor is set, is measured the temperature of water by multiple temperature sensor.
As preferably, central controller 21 carrys out the aperture of by-pass valve control 20,22 by the mean value of the temperature of the water of multiple temperature sensor measurement.
As preferably, central controller 21 carrys out the aperture of by-pass valve control 20,22 by the minimum of the temperature of the water of multiple temperature sensor measurement.By taking minimum, can ensure that the temperature of the water of all positions in water tank 8 can both reach utilizable temperature.
As preferably, at least one described temperature sensor is arranged on the position near tank entry pipe 18 in water tank 8.
As preferably, at least one described temperature sensor is arranged on the position near vessel outlet 17 in water tank 8.
As preferably, it is 8-13 degree Celsius that limit value deducts lower numerical limit, is preferably 9-11 degree Celsius.
4. embodiment four
As an improvement, in described water tank 8, water-level gauge is set, described water-level gauge and central controller 21 data cube computation.The height of central controller level monitoring thus the size of the aperture of by-pass valve control 20,22.
By the height of level monitoring, avoid the water level in water tank too low, thus cause thermal-collecting tube 1 release end of heat 10 to dispel the heat, thermal-collecting tube is caused to damage, avoid the water level in water tank 8 too high simultaneously, thus cause pressure in water tank excessive, especially when ebuillition of heated.
If the water level of the water tank 8 that water-level gauge is measured is higher than the numerical value of the upper limit, then the aperture of central controller 21 by-pass valve control 20 increases, and reduces the aperture of valve 22, thus the water entered in water tank 8 is reduced, the water left in water tank 8 is increased, thus makes the discharge reduction in water tank 8.The water level of water in water tank 8 is reduced by the minimizing of the water yield.On the contrary, the water level in the water tank 8 that water-level gauge is measured is lower than the numerical value of lower limit, then the aperture of central controller 21 by-pass valve control 20 reduces, increase the aperture of valve 22, thus the water entered in water tank 8 is increased, the water left in water tank 8 is reduced, thus the water yield in water tank 8 is increased.
As preferably, the limit value of water level is the height at the 90%-95% place of water tank capacity, is preferably 93%.
As preferably, the lower numerical limit of water level is the height that thermal-collecting tube 1 release end of heat 10 stretches in water tank.Thus the water in guarantee water tank covers release end of heat comprehensively.
5. embodiment five
Embodiment five is the improvement combined embodiment one, embodiment four.
If the temperature of the water in temperature sensor measurement water tank 8 is lower than the numerical value of lower limit, now central controller 21 carrys out the opening and closing of autocontrol valve 20,22 according to the water level that the water-level gauge of monitoring is measured, and concrete measure is as follows:
The water level that the water-level gauge that central controller 21 is monitored is measured is higher than lower limit and lower than higher limit, then central controller 21 by-pass valve control 22,20 is closed automatically, thus ensures that the water in water tank 8 continues heat temperature raising;
The water level that the water-level gauge that central controller 21 is monitored is measured is lower than lower limit, then central controller 21 by-pass valve control 20 is closed automatically, valve 22 continues to open, thus ensure that water continues to flow in water tank 8, the water level that the water-level gauge monitored when central controller 21 is measured equals or higher than lower limit, then central controller 21 by-pass valve control 22 is closed automatically;
The water level that the water-level gauge that central controller 21 is monitored is measured is higher than higher limit, then central controller 21 by-pass valve control 20 continues to open, valve 22 is closed automatically, thus ensure that water continues to flow out water tank 8, the water level measured when the water-level gauge of central controller 21 monitoring is equal to or less than higher limit, then central controller 21 by-pass valve control 20 is closed automatically.
Remaining feature and embodiment one, embodiment five are identical, just describe no longer one by one.
6. embodiment six
Embodiment six is the improvement combined embodiment two, embodiment four.
If the temperature of the water of the outlet 19 that temperature sensor 19 is measured is lower than the numerical value of lower limit, central controller 21 carrys out the aperture of autocontrol valve 20,22 according to the water level that the water-level gauge of monitoring is measured, and concrete measure is as follows:
The water level that the water-level gauge that central controller 21 is monitored is measured is lower than higher limit, then the aperture of central controller 21 by-pass valve control 20 increases, reduce the aperture of valve 22, thus the water entered in water tank 8 is reduced, the water left in water tank 8 is increased, thus make the discharge reduction in water tank 8, if the water level in water tank 8 is reduced to lower limit or close to lower limit, then central controller controls valve 20,22 is closed;
The water level that the water-level gauge that central controller 21 is monitored is measured is lower than lower limit, then central controller 21 by-pass valve control 20 is closed, and gives the alarm simultaneously; Now show the water temperature that cannot realize needs at present, reason may be intensity of illumination not or other reasons, note to remind operator.
If the temperature of the water of the outlet 19 that temperature sensor 19 is measured is higher than the numerical value of the upper limit, central controller 21 carrys out the aperture of autocontrol valve 20,22 according to the water level that the water-level gauge of monitoring is measured, and concrete measure is as follows:
The water level that the water-level gauge that central controller 21 is monitored is measured is lower than higher limit, then the aperture of central controller 21 by-pass valve control 20 reduces, and increases the aperture of valve 22, thus the water entered in water tank 8 is increased, the water left in water tank 8 is reduced, thus the water yield in water tank 8 is increased; If the water level in water tank 8 is increased to higher limit or close to higher limit, then central controller controls valve 20,22 is closed;
The water level that the water-level gauge that central controller 21 is monitored is measured is higher than higher limit, then central controller 21 by-pass valve control 22 is closed, and gives the alarm simultaneously; Now show the water temperature that cannot realize needs at present, reason may be arrange the too low or other reasons of water temperature, notes to remind operator.
Remaining feature and embodiment one, embodiment five are identical, just describe no longer one by one.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (10)
1. an intelligent control method for solar energy system, described solar energy system comprises heat collector, and described heat collector comprises thermal-collecting tube and water tank, and described thermal-collecting tube comprises heat absorbing end and release end of heat, and described release end of heat is arranged in water tank; Set temperature sensor, water-level gauge in water tank, the inlet tube of water tank and outlet distinguish inlet porting tube valve and outlet valve, described temperature sensor, water-level gauge, inlet tube valve and outlet valve and central controller data cube computation; It is characterized in that: if the temperature of the water in temperature sensor measurement water tank is lower than the numerical value of lower limit, now central controller controls the opening and closing of inlet tube valve and outlet valve automatically according to the water level that the water-level gauge of monitoring is measured.
2. solar energy system intelligent control method as claimed in claim 1, it is characterized in that, described method comprises the steps:
The water level of the water-level gauge measurement of central controller monitoring is higher than lower limit and lower than higher limit, then central controller controls inlet tube valve and outlet valve are closed automatically;
The water level of the water-level gauge measurement of central controller monitoring is lower than lower limit, then central controller controls outlet valve is closed automatically, inlet tube valve continues to open, thus ensure that water continues to flow in water tank, the water level measured when the water-level gauge of central controller monitoring equals or higher than lower limit, then central controller controls inlet tube valve is closed automatically;
The water level of the water-level gauge measurement of central controller monitoring is higher than higher limit, then central controller controls outlet valve continues to open, inlet tube valve is closed automatically, thus ensure that water continues to flow out water tank, the water level measured when the water-level gauge of central controller monitoring is equal to or less than higher limit, then central controller controls valve is closed automatically.
3. the intelligent control method of solar energy system as claimed in claim 2, is arranged multiple temperature sensor in described water tank, is measured the temperature of water by multiple temperature sensor.
4. the intelligent control method of solar energy system as claimed in claim 3, central controller controls the aperture of inlet tube valve and outlet valve by the mean value of the temperature of the water of multiple temperature sensor measurement.
5. the intelligent control method of solar energy system as claimed in claim 4, central controller controls the aperture of inlet tube valve and outlet valve by the minimum of the temperature of the water of multiple temperature sensor measurement.
6. the intelligent control method of solar energy system as claimed in claim 3, at least one temperature sensor is arranged on the position near tank entry pipe in water tank.
7. the intelligent control method of solar energy system as claimed in claim 3, at least one temperature sensor is arranged on the position near vessel outlet in water tank.
8. the intelligent control method of solar energy system as claimed in claim 1, it is characterized in that: described thermal-collecting tube comprises flat tube and fin, described flat tube comprises tube wall parallel to each other and sidewall, described sidewall connects the end of parallel tube wall, fluid passage is formed between described sidewall and described parallel tube wall, described thermal-collecting tube release end of heat comprises fin, described fin is arranged between tube wall, described fin comprises the sloping portion favouring tube wall, described sloping portion connects with parallel tube wall, described sloping portion is by the multiple passage aisle of spaced for fluid passage formation, adjacent sloping portion connects on tube wall, triangle is formed between described adjacent sloping portion and tube wall, sloping portion arranges intercommunicating pore, thus adjacent passage aisle is communicated with each other, intercommunicating pore is isosceles triangle, and the triangle formed between described adjacent sloping portion and tube wall is isosceles triangle.
9. the intelligent control method of solar energy system as claimed in claim 8, is characterized in that: the drift angle of the isosceles triangle of intercommunicating pore is B, and the drift angle of the isosceles triangle formed between adjacent sloping portion and tube wall is A, then meet following formula:
Sin(B)=a+b*sin(A/2)-c*sin(A/2)
2；
Wherein a, b, c are parameters, wherein 0.559<a<0.565,1.645<b<1.753,1.778<c<1.883;
60°<A<160°；35°<B<90°。
10. a solar energy system, comprises the control method of one of claim 1-9.
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| CN113915778A (en) * | 2020-03-09 | 2022-01-11 | 山东省产品质量检验研究院 | Automatic adjusting and circulating driving method for solar heat-conducting medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915778A (en) * | 2020-03-09 | 2022-01-11 | 山东省产品质量检验研究院 | Automatic adjusting and circulating driving method for solar heat-conducting medium |
| CN113915778B (en) * | 2020-03-09 | 2023-11-03 | 山东省产品质量检验研究院 | Automatic regulation and circulation driving method for solar heat conducting medium |
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