CN107367078B - A kind of solar heat-preservation system using bypass conduit intelligent control - Google Patents

A kind of solar heat-preservation system using bypass conduit intelligent control Download PDF

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Publication number
CN107367078B
CN107367078B CN201710540468.3A CN201710540468A CN107367078B CN 107367078 B CN107367078 B CN 107367078B CN 201710540468 A CN201710540468 A CN 201710540468A CN 107367078 B CN107367078 B CN 107367078B
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China
Prior art keywords
heat
storage heater
temperature
tube
water
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CN201710540468.3A
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Chinese (zh)
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CN107367078A (en
Inventor
李艳
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Shandong University of Technology
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Shandong University of Technology
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Priority to CN201610018129.4A priority Critical patent/CN105627596B/en
Priority to CN201710540468.3A priority patent/CN107367078B/en
Publication of CN107367078A publication Critical patent/CN107367078A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00Arrangements for controlling solar heat collectors
    • F24S50/40Arrangements for controlling solar heat collectors responsive to temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/40Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/90Solar heat collectors using working fluids using internal thermosiphonic circulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The present invention provides a kind of solar heat-preservation systems using bypass conduit intelligent control, the system comprises heat collectors, storage heater, storage heater pipe valve and storage heater line temperature sensor are set on storage heater pipeline, bypass line valve and bypass line temperature sensor are set on bypass line;Central controller automatically controls storage heater pipe valve, bypass line valve, the closing for exporting tube valve according to the temperature of temperature and bypass line in the temperature of the accumulator inlet pipe of detection, water tank.The present invention controls multiple valves by the temperature of temperature and bypass line in the temperature of accumulator inlet pipe, water tank, to realize accumulation of heat intelligent control.

Description

A kind of solar heat-preservation system using bypass conduit intelligent control
Technical field
The invention belongs to field of solar energy more particularly to a kind of solar heat-preservation systems.
Background technique
With the rapid development of modern social economy, the mankind are increasing to the demand of the energy.However coal, petroleum, day The traditional energies storage levels such as right gas constantly reduce, are increasingly in short supply, cause rising steadily for price, while conventional fossil fuel causes Problem of environmental pollution it is also further serious, these all limit the development of society and the raising of human life quality significantly.The energy Problem has become most one of distinct issues of contemporary world.Thus seek the new energy, especially free of contamination cleaning energy Source has become the hot spot of present people's research.
Solar energy is a kind of inexhaustible clean energy resource, and stock number is huge, and earth surface is received every year Solar radiant energy total amount be 1 × 1018KWh is more than 10,000 times of the world year consumption gross energy.However since solar radiation is arrived It is small (about one kilowatt every square metre) up to tellurian energy density, and be it is discontinuous, this is to large-scale development and utilization Bring certain difficulty.Therefore, it in order to utilize solar energy extensively, not only to solve the problems, such as technical but also economically necessary It can mutually be competed with conventional energy resource.
The degree of automation of solar heat-preservation is not high at present, although the prior art also carries out the intelligent control of solar energy Research, but be not many for the Intelligent Control Research of solar heat-preservation, in view of the above-mentioned problems, the present invention provides a kind of new Intelligent control solar heat-preservation system, thus the intelligent control during Solar use.
Summary of the invention
The present invention provides a kind of new solar heat-preservation systems, to solve the technical issues of front occurs.
To achieve the goals above, technical scheme is as follows:
A kind of solar heat-preservation system, the system comprises heat collector, storage heater, the heat collector includes thermal-collecting tube and water Case, the thermal-collecting tube include heat absorbing end and release end of heat, and the release end of heat is arranged in water tank;The storage heater is arranged in storage heater On pipeline, the water tank is connected to form circulation loop with storage heater, and thermal-collecting tube absorbs solar energy, the water in heating water tank, heating Water afterwards enters storage heater by vessel outlet, by heat storage in the heat-storing material of storage heater;The storage heater pipeline Upper setting storage heater pipe valve and storage heater line temperature sensor are respectively used to the flow for the water that control enters in storage heater Enter the temperature of the water in storage heater with detection, the system also sets up the bypass line of storage heater pipeline parallel connection, the bypass Bypass line valve and bypass line temperature sensor are set on pipeline, are respectively used to the flow of water and inspection on control bypass line The temperature of bypass line water is surveyed, temperature sensor is set in the storage heater, for detecting the temperature of heat-storing material;The water tank Interior setting temperature sensor, for detecting the water temperature in water tank, setting outlet tube valve on vessel outlet;The storage heater Pipe valve, bypass line valve, outlet tube valve and storage heater line temperature sensor, bypass line temperature sensor and The temperature sensor and central controller progress data connection in temperature sensor, water tank in storage heater;The center control Device processed automatically controls accumulation of heat according to the temperature of temperature and bypass line in the temperature of the accumulator inlet pipe of detection, water tank Device pipe valve, bypass line valve, the closing for exporting tube valve.
Preferably, if the temperature of the accumulator inlet pipe of central controller detection is lower than the heat-storing material of storage heater Temperature, then storage heater pipe valve and outlet tube valve is automatically closed in central controller, opens bypass line valve;In water tank Water continues through solar energy heating, and when the water temperature in water tank is more than heat-storing material temperature certain numerical value, outlet tube valve is opened, Water is flowed through by bypass line, if the water temperature of bypass line temperature sensor detection is more than the certain degree of heat-storing material temperature, Then bypass line valve is closed, and storage heater pipe valve is opened, so that water, which enters, carries out accumulation of heat in storage heater.
Preferably, if bypass line temperature sensor detection water temperature more than 5 degrees Celsius of heat-storing material temperature, by Logical pipe valve is closed, and storage heater pipe valve is opened, so that water, which enters, carries out accumulation of heat in storage heater.
Preferably, the position on vessel outlet close to water tank is arranged in the outlet tube valve.
Preferably, the multiple temperature sensors of setting in the water tank, measure water by multiple temperature sensors Temperature.
Preferably, central controller controls accumulation of heat by the average value of the temperature of the water of multiple temperature sensor measurements Device pipe valve, bypass line valve, the opening and closing for exporting tube valve.
Preferably, central controller controls accumulation of heat by the minimum of the temperature of the water of multiple temperature sensor measurements Device pipe valve, bypass line valve, the opening and closing for exporting tube valve.
Preferably, the position in water tank close to tank entry pipe is arranged at least one temperature sensor.
Preferably, the thermal-collecting tube includes flat tube and fin, the flat tube includes tube wall and side parallel to each other Wall, the side wall connects the end of parallel tube wall, forms fluid channel between the side wall and the parallel tube wall, described Thermal-collecting tube release end of heat includes fin, and the fin is arranged between tube wall, and the fin includes the sloping portion for favouring tube wall, The sloping portion is connected with parallel tube wall, and fluid channel is separated from each other to form multiple passage aisles by the sloping portion, Adjacent sloping portion connects on tube wall, constitutes triangle between the adjacent sloping portion and tube wall;In rake Divide upper setting intercommunicating pore, so that adjacent passage aisle be made to communicate with each other;Intercommunicating pore is isosceles triangle, the adjacent rake Point and tube wall between the triangle that constitutes be isosceles triangle.
Preferably, the apex angle of the isosceles triangle of intercommunicating pore is B, constituted between adjacent sloping portion and tube wall The apex angle of isosceles triangle is A, then meets 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°.
Compared with prior art, solar heat-preservation system of the invention has the advantage that
1) present invention, to guarantee intelligent accumulation of heat, is guaranteed by the regenerator temperature of detection by the opening and closing of control valve Heat makes full use of.
2) present invention is by the inflow temperature of monitoring heat utilization device and the temperature of heat-storing material, to pass through control flow Guarantee that the water temperature of heat utilization device is constant.
3) present invention has studied new collector structure, and through a large number of experiments, it is determined that optimal flat thermal-arrest The structure size of pipe, so that in the case where guaranteeing heat exchange resistance, so that heat transfer effect reaches best.
Detailed description of the invention
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 structural schematic diagram in the cross section at one thermal-collecting tube inner rib plate setting lead to the hole site of the present invention;
Fig. 5 is the schematic diagram of present invention setting through-hole structure sloping portion plane;
Fig. 6 is another schematic diagram of present invention setting through-hole structure sloping portion plane;
Fig. 7 is triangle through hole structural schematic diagram of the invention;
Fig. 8 is the cross-sectional view of thermal-collecting tube heat absorbing part of the present invention;
Fig. 9 is the cross-sectional view of currently preferred thermal-collecting tube heat absorbing part;
Figure 10 Fig. 1 improves schematic diagram;
Figure 11 storage heater structural schematic diagram.
Appended drawing reference is as follows:
1 thermal-collecting tube, 2 fluid channels, 3 tube walls, 4 sloping portions, 5 vertex, 6 intercommunicating pores, 7 fins, 8 water tanks, 9 heat absorbing ends, 10 release end of heat, 11 bottom plates, 12 absorption films, 13 glass plates, 14 thermal insulation layers, 15 inner rib plates, 16 storage heaters, 17 vessel outlets, 18 Tank entry pipe, 19 outlet pipe temp sensors, 20 outlet tube valves, 21 bypass line temperature sensors, 22 bypass line valves Door, 23 entrance tube valves, 24 storage heater pipe valves, 25 storage heater line temperature sensors, 26 central controllers, 27 storage heaters Inlet tube, 28 heat-storing materials, 29 heat utilization pipe valves, 30 heat utilization devices.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
A kind of solar thermal collection system, as shown in Figs. 1-2, the system comprises heat collector, storage heater 16, the thermal-arrests Device includes thermal-collecting tube 1 and water tank 8, and the thermal-collecting tube 1 includes heat absorbing end 9 and release end of heat 10, and the release end of heat 10 is arranged in water tank 8 In.Heat absorbing end 9 absorbs solar energy, and the water in water tank is transferred heat to by release end of heat 10.The water tank 8 connects with storage heater 16 Logical to form circulation loop, thermal-collecting tube 1 absorbs solar energy, the water in heating water tank 8, the water after heating by vessel outlet 17 into Enter storage heater 16, exchange heat in storage heater 16, by heat storage in the heat-storing material of storage heater 16, in storage heater 16 The water of outflow enters in water tank 8 in tank entry pipe 18 to be heated.
The solar thermal collector further includes transparency glass plate 13, thermal insulation layer 14, absorption film 12.The setting of absorption film 12 is collecting The upper surface of 1 heat absorbing end 9 of heat pipe (i.e. towards the one side of the sun), transparency glass plate 13 are covered on the front of the heat absorbing end 9 of thermal-collecting tube, There are thermal insulation layers 17 between heat absorbing end 9 and transparency glass plate 16, preferably, thermal insulation layer is vacuum layer.As preferably clear glass Glass plate 16 uses tempered glass, thermal insulation layer for vacuum layer;Preferably, heat pipe 1 is arranged in absorption film 12 by way of sputtering The front of heat absorbing end 9.
For the setting of bottom plate 11 in 1 lower part of thermal-collecting tube, the bottom plate is thermal insulation material.
Preferably, thermal insulation layer 17 with a thickness of 18mm~25mm;As preferably 20 mm.
As shown in figure 3, the thermal-collecting tube includes flat tube 1 and fin 7 in release end of heat 10, the flat tube 1 includes mutual Parallel tube wall 3 and side wall 12, the side wall 12 connect the end of parallel tube wall 2, the side wall 12 and the parallel pipe Fluid channel 2 is formed between wall 3, the fin 7 is arranged between tube wall 3, and the fin 7 includes the rake for favouring tube wall Points 4, the sloping portion 4 and the parallel connection of tube wall 3, the sloping portion 4 fluid channel 2 is separated from each other to be formed it is multiple Passage aisle 10, adjacent sloping portion 4 connect on tube wall, constitute triangle between the adjacent sloping portion 4 and tube wall 3 Shape;Intercommunicating pore 6 is set on sloping portion 4, so that adjacent passage aisle 10 be made to communicate with each other.
By the way that intercommunicating pore 6 is arranged, guarantee the connection between adjacent passage aisle 10, so that in the big passage aisle of pressure Fluid can be flowed into the small passage aisle of neighbouring pressure, solve flat tube heat exchange in the case where internal pressure it is uneven And the problem that local pressure is excessive improves heat exchange efficiency, together to promote abundant flowing of the fluid in heat exchanger channels When also improve the service life of thermal-collecting tube.
Preferably, centre (the centre of tube wall 3 i.e. in Fig. 3 cross-sectional view of tube wall 3 along flat tube cross section Position) to 12 direction of two sides side wall, 6 area of through-hole on different sloping portions 4 constantly becomes smaller.Wherein, it is located at flat The area in the middle position of flat pipe 1, i.e., the middle position of tube wall 3 in Fig. 2 cross-sectional view, through-hole 6 is maximum.Main cause is It is found through experiments that, because fluid distribution is uneven, intermediate pressure is maximum, is gradually reduced from centre to pressure at both sides.Therefore logical The distribution of hole area reduces the flow resistance at middle part, while so that the fluid at middle part is flowed to both sides as far as possible in order to avoid opening The excessive reduction for causing heat exchange area of hole area, so that perforated area is changed according to pressure, while reducing resistance, Further increase heat exchange efficiency.
It is described logical on different sloping portions 4 preferably, along the centre of flat tube cross section to 12 direction of side wall The amplitude that 6 area of hole constantly becomes smaller is increasing.By so set, and meet the changing rule of flowing pressure, into one While step reduces flow resistance, heat exchange efficiency is improved.
Preferably, the shape of the intercommunicating pore 6 is isosceles triangle, the midpoint to top on the bottom edge of the isosceles triangle The direction at angle and the flow direction of fluid are identical.That is, the apex angle direction of isosceles triangle is fluid flow direction.Pass through Experiment discovery, apex angle direction is set as being consistent with flow direction, heat exchange efficiency can be improved, while reducing flowing resistance Power.By so set, 10% or so heat exchange efficiency can be improved, at the same reduce by 9% or so resistance.
Preferably, it is isosceles triangle that triangle is constituted between the adjacent sloping portion and tube wall, after Referred to as the second isosceles triangle.By being set to isosceles triangle, it is ensured that fluid flowing uniformly, improves heat transfer effect.
Preferably, the sloping portion vertex 5 is plane, the vertex 5 of two adjacent sloping portions 4 is connected, The vertex 5 is connected with tube wall 3.Because setting fixed point 5 is plane, so that sloping portion 4 and tube wall contact area are big, from And make the more sufficiently preferably contact of tube wall and sloping portion.So that installation is more easier, avoid sliding.
Preferably, being constituted in triangle between adjacent sloping portion 4 and tube wall, the opposite interior table of sloping portion 4 The tie point in face forms vertex of a triangle, and the vertex of a triangle is located on tube wall.
As shown in fig. 7, the apex angle of the isosceles triangle be B, such as Fig. 5, it is same along the flow direction of fluid shown in 6 Multiple rows of triangle through hole 6 is arranged in a sloping portion 4.As shown in fig. 6, multiple rows of through-hole 6 is shifted structure.
It finds in an experiment, the area of through-hole cannot be excessive, will lead to the loss of heat exchange area if excessive, reduces heat exchange Efficiency if too small, causes local pressure distribution still uneven, and similarly, the distance of adjacent tube wall 3 cannot be excessive, crosses conference Lead to the reduction of heat exchange efficiency, too small to will lead to flow resistance excessive.According to experiment find, the apex angle of the first isosceles triangle and The apex angle of second isosceles triangle is the variation of certain rule, such as the second isosceles triangle apex angle becomes larger, so as to cause heat exchange The passage aisle area in channel increases, and corresponding flow resistance becomes smaller, therefore the circulation area of the second isosceles triangle will at this time Become smaller, the area of through-hole 6 can be reduced in this way, while in the case where guaranteeing flow resistance, improves heat exchange efficiency.Therefore first etc. There are following relationships between lumbar triangle shape and the second isosceles triangle apex angle:
The apex angle of first isosceles triangle is B, and the apex angle of the second isosceles triangle is A, then meets 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°.
Preferably, a=0.5631, b=1.6948, c=1.8432;
80°<A<120°;50°<B<60°;
By above-mentioned formula, the best pass between the first isosceles triangle and the second isosceles triangle apex angle can be determined System, can guarantee in the case where meeting flow resistance under this relationship, reach optimal heat exchange efficiency.
Preferably, H=7-18mm.It is further used as preferably, 10 < H < 11mm.
Preferably, the length on the first isosceles triangle bottom edge is h, meet following formula:
0.28 < d*(h/H) < 0.36;Wherein d is parameter, 0.7 < d < 2.0;
H is the face the distance between opposite with adjacent tube wall.
Preferably, 1.0 < d < 1.4.
Preferably, with the increase that apex angle is A, the d becomes smaller.
Preferably, the d becomes smaller with the increase of H.
The width of tube wall is W, preferably 7.4 > W/H > 4.6, further preferably, 6.8 > W/H > 5.6.
By above-mentioned optimization design, the heat exchange property of thermal-collecting tube can be further improved, while reducing flow resistance.
For sloping portion formed apex angle A it is different in the case of, such as along tube wall sidewall direction from middle part to two sides, The smaller and smaller situation of the included angle A that the described adjacent sloping portion is formed, the A in the formula of front take sloping portion adjacent The average value of two apex angles calculate.
The present invention is the thousands of secondary numerical simulations and test data of the thermal-collecting tube by multiple and different sizes, is meeting work Industry requires in the case of pressure-bearing (10MPa or less), in the case where realizing maximum heat exchange amount, the optimal flat tube wall that sums up Dimensionally-optimised relationship.
Preferably, the bottom edge of the adjacent isosceles triangle through-hole of the same row is all on one wire, same row Adjacent through-hole distance is S1, the 2.9 × h < S1 < 3.3 × h, and wherein S1 is with the bottom of two neighboring isosceles triangle through-hole The distance at the midpoint on side.Preferably 3.2 × h=S1.
Preferably, the bottom edge of the isosceles triangle of the through-hole of adjacent row is parallel to each other, the vertex of isosceles triangle is on earth The distance at side midpoint is L, and the distance S2 of adjacent row is 3.8*L < S2 < 4.8*L.Preferably S2=4.4*L
When the bottom edge difference of the isosceles triangle of adjacent row, the weighted average on two bottom edges is taken to calculate.
Preferably, the angle of the isosceles triangle of same row is identical with bottom edge.I.e. shape is identical, is equal Shape.
For the formula of front, the through-hole different for front and rear row size is also still applicable in.
Preferably, the wall thickness of fin is 0.5-0.9mm;Preferably, 0.6-0.7mm.
For the specific size parameter that do not mention, it is designed according to normal heat exchanger.
The fin 7 is positioned only at release end of heat 10.
Preferably, shown in 9, inner rib plate 15 is arranged on 9 inner wall of heat absorbing end of thermal-collecting tube 1 such as Fig. 8.
Preferably, the inner rib plate 15 is straight panel shape, the extending direction of inner rib plate 15 along fluid evaporator flowing Direction, i.e., along heat absorbing end 9 to heat release extreme direction, in other words along the axial movement of thermal-collecting tube heat absorbing end 9.By so setting It sets, so that the flow direction of the fluid space and fluid that are formed between inner rib plate is consistent, to reduce flow resistance, simultaneously Also increase and strengthens heat absorption.
Preferably, 15 height of inner rib plate is continuous to be increased, the increased width of height along heat absorbing end 9 to heat release extreme direction It spends increasing.By increasing by 15 height of inner rib plate, to increase the heat exchange area of inner rib plate 15.Experiment discovery, by such Setting, compared with fin height is identical, can be improved about 7% heat exchange efficiency.
Preferably, as shown in fig. 7, along the centre of 1 heat absorbing end of thermal-collecting tube, 10 cross section to two sides, the inner rib plate 15 Height constantly reduce.Wherein, positioned at the middle position of 1 heat absorbing end 10 of thermal-collecting tube, the height highest of inner rib plate 15.
Because being found by experiment that, thermal-collecting tube heat absorbing end is most in middle part heat absorption, and from middle part to two sides, heat absorption gradually becomes It is small, therefore pass through 15 height change of inner rib plate of setting thermal-collecting tube, so that the endotherm area of thermal-collecting tube heat absorbing end is at middle part Maximum, so that middle part heat absorption capacity is maximum, meets the heat absorption rule of thermal-collecting tube heat absorbing end heat in two sides minimum in this way, so that The heat absorption of thermal-collecting tube heat absorbing end uniformly, avoids thermal-collecting tube heat absorbing end local temperature from overheating, causes heat dissipation effect excessively poor, cause on the whole The shortening in thermal-collecting tube heat absorbing end service life.
By above-mentioned setting, middle part flow resistance is enabled to become larger, more fluids are distributed to heat absorbing end two sides, so that Fluid distribution is more uniform.
Preferably, from centre to two sides, the amplitude of the height reduction of the inner rib plate 15 constantly increases.
By above-mentioned setting, and meet the heat absorption rule of thermal-collecting tube heat absorbing end, further increases thermal-collecting tube heat absorbing end Heat absorption efficiency guarantees that the whole heat absorption of thermal-collecting tube heat absorbing end is uniform, and temperature is uniform, increases the service life of thermal-collecting tube.
Preferably, the thermal-collecting tube is gravity assisted heat pipe.
Preferably, valve 24 and temperature sensor 25 are arranged on the storage heater pipeline, it is respectively used to control and enters storage The flow of water in hot device 16 and detection enter the temperature of the water in storage heater 16, and similarly, the solar heat-preservation system is also set The bypass line of storage heater pipeline parallel connection is set, valve 22 and temperature sensor 21 are set on the bypass line, are respectively used to control The temperature of the flow of water and detection water on bypass line processed.Heat-storing material is set in the storage heater 16, and the heat-storing material is excellent It is selected as phase-change material.Preferably, temperature sensor is set in the storage heater, for detecting the temperature of heat-storing material.Described Valve 22,24 and temperature sensor 21,25 and the temperature sensor in storage heater and central controller 26 carry out data connection.
Temperature sensor is set in water tank 8, and for detecting the temperature in water tank 8, setting temperature is passed on 8 outlet 17 of water tank Sensor 19, for detecting the water temperature on vessel outlet 17, setting outlet tube valve 20, the water tank on vessel outlet 17 Temperature sensor and temperature sensor 17, outlet tube valve 20 and 26 data connection of central controller in 8.
The main object of the present invention is to realize intellectualized detection and the control of solar heat-preservation system, and the present invention passes through following Multiple embodiments realize technical effect of the invention.
1. embodiment one
Improved as one, central controller 26 according to the temperature of the heat-storing material of detection and enter the water temperature of storage heater come The opening and closing of autocontrol valve 22,24.
It is preferred that valve 24 is opened in normal course of operation, valve 22 is closed.
If the temperature of heat-storing material is higher than the water temperature into storage heater, 26 autocontrol valve 24 of central controller is closed It closes, while valve 21 is opened.Guarantee that water does not enter storage heater, because if water enters storage heater 16 at this time, does not play not only The effect of accumulation of heat, instead by the heat transfer water supply in heat-storing material, to reduce accumulation of heat effect.Therefore pass through such measure The energy can be saved.
If the water temperature that bypass line temperature sensor 21 detects is higher than the temperature of heat-storing material, central controller is controlled automatically Valve 24 processed is opened, and valve 22 is closed, and is guaranteed that water is able to enter storage heater 16, is played the effect of accumulation of heat.
Preferably, multiple temperature sensors 24 are arranged on the storage heater pipeline water inlet pipe, passed by multiple temperature Sensor 24 measures the temperature of water on storage heater pipeline water inlet pipe.
Preferably, the average value of the temperature for the water that central controller 26 is measured by multiple temperature sensors 24 controls The opening and closing of valve 22,24.
Preferably, the minimum of the temperature for the water that central controller 26 is measured by multiple temperature sensors 25 controls The opening and closing of valve 22,24.By taking minimum, it is capable of the further accuracy of data.
Preferably, accumulator inlet pipe is arranged in close to the position of storage heater 16 at least one described temperature sensor It sets.
Preferably, the tie point of the bypass line pipeline and storage heater pipeline is close to accumulator inlet.It keeps away in this way Exempt from the cold water left when storing too many upper primary closing valve 24 on storage heater pipeline.
2. embodiment two
It is improved as one, the central controller 26 is according in the temperature of 16 inlet tube of storage heater of detection, water tank 8 Temperature and the temperature of bypass line carry out the closing of autocontrol valve 20,22,25.
If the temperature for the accumulator inlet pipe that central controller 26 detects is lower than the temperature of the heat-storing material of storage heater, 26 automatic-closing valve 24 of central controller and valve 20 open valve 22.Opening valve 22 can guarantee to be located at 20 He of valve Water energy between 24 enough passes through bypass line and is recycled in water tank to be heated again, while emptying not being inconsistent between valve 22,24 Close the water of temperature requirement.Water in water tank 8 continues through solar energy heating, when the water temperature in water tank 8 is more than heat-storing material temperature When certain numerical value, preferably greater than 10 degrees Celsius or more, valve 20,24 is opened, and valve 22 is closed, so that water enters storage heater Middle carry out accumulation of heat.
By above-mentioned measure, storage heater accumulation of heat can be made to realize intelligentized control method.
Preferably, the position on vessel outlet close to water tank is arranged in the valve 20.Make outlet in this way Cold water will not be substantially stored on road 17, guarantee accumulation of heat effect.
Preferably, the multiple temperature sensors of setting in the water tank 8, measure water by multiple temperature sensors Temperature.
Preferably, central controller 26 is by the average value of the temperature of the water of multiple temperature sensor measurements come control valve The opening and closing of door 20,22,24.
Preferably, central controller 26 is by the minimum of the temperature of the water of multiple temperature sensor measurements come control valve The opening and closing of door 20,22,24.By taking minimum, it can guarantee that the temperature of the water of all positions in water tank 8 can reach Utilizable temperature.
Preferably, the position in water tank 8 close to tank entry pipe 18 is arranged at least one described temperature sensor.
Preferably, the position in water tank 8 close to vessel outlet 17 is arranged at least one described temperature sensor.
Preferably, the tie point of the bypass line pipeline and storage heater pipeline is close to accumulator inlet.It keeps away in this way Exempt from the cold water left when storing too many upper primary closing valve 24 on storage heater pipeline.
3. embodiment three
Further improvement of the embodiment three as embodiment two.
If the temperature for the accumulator inlet pipe that central controller 26 detects is lower than the temperature of the heat-storing material of storage heater, 26 automatic-closing valve 24 of central controller and valve 20 open valve 22.Opening valve 22 can guarantee to be located at 20 He of valve Water energy between 24 enough passes through bypass line and is recycled in water tank to be heated again.Water in water tank 8 continues through solar energy and adds Heat, when the water temperature in water tank 8 is more than heat-storing material temperature certain numerical value, preferably greater than 10 degrees Celsius or more, valve 20 is opened, Water is flowed through by bypass line, if the water temperature that bypass line sensor 21 detects is more than the certain degree of heat-storing material, such as super 5 degrees Celsius are crossed, then bypass line valve 22 is closed, and storage heater pipeline 24 is opened, and is stored so that water enters in storage heater Heat.
By above-mentioned measure, the temperature of water is detected by bypass line, is further improved the effect of accumulation of heat, is improved The intelligent control of accumulation of heat.
Remaining technical characteristic not described is identical as embodiment two, is not just further describing.
4. example IV
It is improved as one, solar heat-preservation system can be with intelligence computation heat loss.As shown in Figure 1, in the water tank 8 Temperature sensor can detecte the water temperature in water tank 8, and the temperature sensor 25 can measure into the water temperature in storage heater, lead to It crosses water temperature and flow can calculate heat loss in solar energy system transportational process, i.e., (water temperature-in water tank 8 enters accumulation of heat The water temperature of device) × mass flow × water specific heat.
Flowmeter is set on the export pipeline 17, flowmeter is set on storage heater pipeline, and described two flowmeters are in It entreats controller to carry out data connection, calculates heat loss by the mean values of two flowmeters measurement.
It is preferred that calculating heat loss by the way that the flow that flowmeter measures is arranged on storage heater pipeline.
If the heat loss of detection is excessive, central controller issues prompting automatically.Needing to detect fluid circuit at this time is It is no that there are problems.
5. embodiment five
Heat exchanger tube is passed through in the storage heater 16, the heat exchanger tube and heat-storing material 28 carry out heat exchange, the heat exchanger tube It is connected with heat utilization device 30 by pipeline.Valve 29 is set on the pipeline between the heat utilization device 30 and storage heater 16, The valve 29 carries out data connection with central controller.The central controller 26 according to the temperature of the heat-storing material of detection come The aperture of autocontrol valve 29.
If the temperature of the heat-storing material of detection is higher than upper limit value, central controller controls valve 29 increases aperture, with Guarantee that more fluids flow into and participate in heat exchange in storage heater, guarantee making full use of for heat, if the temperature of the heat-storing material of detection Degree is lower than certain numerical value, then central controller controls valve 29 reduces aperture, is joined with guaranteeing that less fluid flows into storage heater With heat exchange, guarantee heating fluid temperature (F.T.).
If when the temperature of the heat-storing material of the detection of detection is lower than lower limit value, central controller controls valve 29 is closed It closes, illustrates that the accumulation of heat of heat-storing material runs out completely at this time.
The intelligence that accumulation of heat utilizes can be carried out by above-mentioned intelligentized control method.
It for other features in storage heater, records with front identical, is just no longer described in detail.
6. embodiment six
Temperature sensor is set on the inlet tube of the heat utilization device 30, is detected automatically by temperature sensor into heat Utilize the temperature of water in device.The temperature sensor and 26 data connection of central controller.If central controller 26 detects Into the water temperature in heat utilization device be higher than upper data, then 26 control valve 29 of central controller aperture increase, thus Increase the fluid flow entered in storage heater 16.By the temperature for increasing the water for being lowered into heat utilization device of the Fluid Volume of heat exchange Degree.On the contrary, if the detection of central controller 26 is lower than lower data, central controller into the water temperature in heat utilization device The aperture of 26 control valves 29 reduces, to reduce into the fluid flow in storage heater 16.By the Fluid Volume for reducing heat exchange Raising enter heat utilization device water temperature.
Preferably, multiple temperature sensors are arranged on the inlet tube of the heat utilization device, passed by multiple temperature Sensor measures the temperature of water.
Preferably, central controller 26 is by the average value of the temperature of the water of multiple temperature sensor measurements come control valve The aperture of door 29.
Preferably, central controller 26 is by the minimum of the temperature of the water of multiple temperature sensor measurements come control valve The aperture of door 29.
Preferably, at least one described temperature sensor be arranged on the inlet tube of heat utilization device in by near-thermal benefit With the position of device.
By above-mentioned measure, can and guarantee that the temperature for entering the water of heat utilization device is kept in a certain range, thus Utilizable temperature can be reached.
Preferably, the heat utilization device is radiator.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention When being defined by the scope defined by the claims..

Claims (2)

1. a kind of solar heat-preservation system using bypass conduit intelligent control, described the system comprises heat collector, storage heater Heat collector includes thermal-collecting tube and water tank, and the thermal-collecting tube includes heat absorbing end and release end of heat, and the release end of heat is arranged in water tank;Institute Storage heater to be stated to be arranged on storage heater pipeline, the water tank is connected to form circulation loop with storage heater, and thermal-collecting tube absorbs solar energy, Water in heating water tank, the water after heating enter storage heater by vessel outlet, by heat storage storage heater accumulation of heat material In material;It is characterized by: the thermal-collecting tube includes flat tube and fin, the flat tube includes tube wall and side parallel to each other Wall, the side wall connects the end of parallel tube wall, forms fluid channel between the side wall and the parallel tube wall, described Thermal-collecting tube release end of heat includes fin, and the fin is arranged between tube wall, and the fin includes the sloping portion for favouring tube wall, The sloping portion is connected with parallel tube wall, and fluid channel is separated from each other to form multiple passage aisles by the sloping portion, Adjacent sloping portion connects on tube wall, constitutes triangle between the adjacent sloping portion and tube wall;In rake Divide upper setting intercommunicating pore, so that adjacent passage aisle be made to communicate with each other;Intercommunicating pore is isosceles triangle, the adjacent rake Point and tube wall between the triangle that constitutes be isosceles triangle;
Along the via area of the centre to two sides sidewall direction, on different sloping portions of the tube wall of flat tube cross section Constantly become smaller;
Storage heater pipe valve and storage heater line temperature sensor are set on the storage heater pipeline, is respectively used to control and enters The flow of water in storage heater and detection enter the temperature of the water in storage heater, and the system also sets up storage heater pipeline parallel connection Bypass line valve and bypass line temperature sensor are arranged on the bypass line for bypass line, are respectively used to control bypass The temperature of the flow of water and detection bypass line water, is arranged temperature sensor in the storage heater, for detecting accumulation of heat on pipeline The temperature of material;Temperature sensor is set in the water tank, for detecting the water temperature in water tank, outlet is set on vessel outlet Tube valve;The storage heater pipe valve, bypass line valve, outlet tube valve and storage heater line temperature sensor, side Logical line temperature sensor and the temperature sensor in storage heater, the temperature sensor in water tank and central controller are counted According to connection;The central controller is according to the temperature and bypass line in the temperature of the accumulator inlet pipe of detection, water tank Temperature come automatically control storage heater pipe valve, bypass line valve, export tube valve closing.
2. solar heat-preservation system as described in claim 1, which is characterized in that if the storage heater of central controller detection enters The temperature of mouth pipe is lower than the temperature of the heat-storing material of storage heater, then storage heater pipe valve and outlet is automatically closed in central controller Tube valve opens bypass line valve;Water in water tank continues through solar energy heating, when the water temperature in water tank is more than accumulation of heat material When material temperature degree certain numerical value, outlet tube valve is opened, and water is flowed through by bypass line, if bypass line temperature sensor detects Water temperature be more than the certain degree of heat-storing material temperature, then bypass line valve close, storage heater pipe valve open so that Water, which enters, carries out accumulation of heat in storage heater.
CN201710540468.3A 2016-01-12 2016-01-12 A kind of solar heat-preservation system using bypass conduit intelligent control Expired - Fee Related CN107367078B (en)

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CN110748912B (en) * 2018-07-24 2021-03-05 青岛科技大学 Power station boiler waste heat utilization system based on smoke temperature communication control valve
CN110748913B (en) * 2018-07-24 2021-04-06 青岛科技大学 Power station boiler waste heat utilization system based on heat storage air temperature communication control
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