CN101874460A - Method for reducing temperature by substituting water for electricity - Google Patents
Method for reducing temperature by substituting water for electricity Download PDFInfo
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Abstract
The invention provides a method for reducing temperature by substituting water for electricity. Cheap water is used as a cooling medium, and the water is sprayed in large scale above main roads in an urban range to reduce the temperature by water evaporation. The water absorbs heat of the urban main roads and vehicles running thereon in large scale to evaporate and gasify so as to reduce the temperature from the water spraying area to the deep area around the road sequentially. When the water vapor automatically floats upwards, surrounding hot air, carbon dioxide and pollutants such as dust and the like float to the high altitude together at the same time, are separated from the urban ground and enhance the air convection strength between the urban area and the suburb. The method for reducing the temperature in the whole urban range can remarkably reduce the urban air-conditioner load so as to greatly reduce the power consumption thereof; calculation shows that the cost for reducing the temperature by adopting water evaporation and spray is only 2.4 percent of the power cost for removing the same heat by adopting air conditioners; and the method reduces the temperature by spraying water and has the remarkable advantage of fully meeting the environment-friendly requirement.
Description
Technical field
Technical field under in the of 1
For reducing too high temperature in summer, people are that employing is at the temperature of the various air-conditioning equipments of indoor installation with the reduction interior of building usually so far.According to the aircondition operation principle, heat transfer medium must could circulate in the great pipeline of resistance under compression pump drives, thereby heat could be moved to the outdoor of high temperature by the low temperature place, therefore this be a kind of electric energy with costliness to be driving force move to outdoor working method of carrying out indoor local cooling with indoor heat is in-plant, thereby and when regulating indoor air temperature, outside air temperature is increased to some extent can to cause the thermal pollution serious to surrounding environment.
Arrive of the vaporization of the in fact most of system of heat on the face of land according to the analysis solar radiation of heat transfer theory by surface water, come-up, the second-order phase transition mode of steam when the condensation of high-altitude directly returned space.Propose to adopt abundant in this programme far beyond electric power resource for this reason, inexpensive moisture is as heat transfer medium, carry out the integral body cooling of environment by the extensive water-spraying evaporation cooling method in open atmosphere space, by at the urban district through street, the water spray of backbone road top is directly extensive draws face of land heat to carry out the carburation by evaporation of moisture, and floating naturally by the lighter steam of proportion, the ground heat is carried to the high-altitude and the radiation direction outer space rapidly, thereby reaches the cooling purpose of in bigger urban area, carrying out globality.This is that a kind of electric power that needn't rely on orders about the temperature reduction technology process that heat transfer medium circulates in the great pipeline of resistance, thereby can reach the temperature that reduces in the whole urban area with cheaper cost, thereby and can reach simultaneously reduce aircondition in the urban area operating load to reach the purpose that reduces urban district high temperature period idle call electric weight significantly.Therefore with the extensive evaporation heat absorption of moisture with reduce in the water spray pipe network coverage area and on every side necessarily the environmental temperature in the depth scope obviously have huge economize on electricity and environment-friendly advantage.Be to adopt to be worth the alternative expensive air conditioning electricity in short supply of cheaper moisture in this programme, the resident living environment is a purpose in the whole urban area to improve simultaneously.The present invention is in order to solve in Process of Urbanization owing to thereby the extensive minimizing of ground vegetation makes the also extensive phenomenon that reduces temperature rising in the urban area that is caused of synchronism of ground water evaporation quantity in essence.At present this is still that forefathers do not set foot in as yet carries out the invention field of whole cooling on a large scale in open regional scope, thus there is no can be for reference contrast background technology document.
Background technology
2. background
Studies show that because atmosphere has the essence of the transparent body of diabatic process, the most of solar radiant heat that therefore arrives the face of land should mainly be directly to return space by the second-order phase transition mode of surface water.The solar radiant heat that arrives the face of land at first makes the surface water vaporization, when floating to the high-altitude condensation on the steam then the radiation mode with particle discharge its latent heat of vaporization and become the drop that swims in the cloud layer simultaneously mutually.To return the face of land again towards most of radiation on the face of land when steam discharges latent heat by some radiation mode when the condensation of high-altitude, the radiant heat on face of land part then directly enters space dorsad, is to be the diabatic process of moisture in atmosphere.With regard to heat-transfer mechanism, moisture is the most outstanding heat-carrying agent of occurring in nature, and moisture can absorb a large amount of heats from the object on every side that is contacted in the evaporation gasification.The latent heat of phase change of water is very big, when 1 kilogram 15 ℃ aqueous water becomes 15 ℃ steam the latent heat of vaporization of required absorption up to 2465.1 kilojoule/kilograms [1] P.196, this calorie value is equivalent to make the heat that 2465.1 kilograms air cooling-down 1 degree discharged that weighs.And the proportion of steam is much smaller than air, and steam proportion is 0.81 kilogram/cubic metre under standard state, and air proportion under standard state be 1.293 kilograms/cubic metre [2] P.203.Therefore steam under buoyancy, can carry huge gasification latent heat and on every side hot-air float to the high-altitude on together.Therefore no matter be the water transpiration effect of natural plant or directly adopt the steam come-up effect that produces behind the artificial water-spraying evaporation all have can be by moisture the evaporation endothermic process near a large amount of heats the ground are carried to the high-altitude rapidly and at last with the form of a radiation direct radiation direction outer space of latent heat of phase change about with its half.Adopt the moisture that has no environmental protection harmfulness to carry out the remote migration work of heat among the present invention just as heat transfer medium and in open endoatmosphere.Thisly can reduce mean temperature of air in the vast urban area on a large scale for the heat transfer type of electricity, therefore also just can effectively reduce the power consumption of city air-conditioning simultaneously, and can not produce thermal pollution surrounding environment with water.Therefore directly in urban area main roads spray water on a large scale, the ambient air temperature of urban district integral body obviously has huge power savings advantages to the heat absorption vaporization mechanism by moisture near the water spray pipe network overlay area to reduce.
Each plant species is in order to keep being exposed to branches and leaves under the sunburst not by sun blister, withered, the evaporative heat loss cooling is carried out in root system of plant all can not stop draw large quantity of moisture and be transported to the blade face from soil, and is constant with the relevant temperature that keeps plant leaf, is to be the extremely important rising ability of plant.According to related data, the weight of 1 kilogram of every growth need be drawn the moisture [3] up to 500～600 kilograms from soil in process of growth in growing process.Under summer burning sun high temperature, because cement and bituminous paving all do not possess the ability that produces absorbing and cooling temperature by the vaporization evaporation of moisture, thereby about 50 ℃ of its surface temperature Chang Gaoda are higher than the soil temperature under meadow and vegetation cover around it far away.Press the convection heat transfer' heat-transfer by convection principle, the face of land after temperature raises will inevitably pass more sensible heats the air to top, the face of land, thereby causes urban district temperature will be higher than the temperature in suburb.Usually the solar radiant heat that arrives the face of land always at first is used for the heat absorption evaporation of surface water, numerous urban areas are owing to the vegetation on most of face of land is substituted by building that does not have the water evaporates ability and road, therefore the solar radiant heat that the face of land accumulated will inevitably at first cause increasing substantially of surface temperature, related data shows that the suburb is that the soil surface temperature that numerous vegetation cover only exceeds about 2～3 ℃ than its top temperature, and the road surface in the city, the house is because of the neither vaporization evaporative cooling mechanism that possesses moisture, therefore under being exposed to the sun, burning sun accumulates in the road surface, the roof, metope, solar radiant heat can cause heating up significantly rapidly of above-mentioned body surface, it all is a natural evaporative cooling pump that draws water that its surface temperature often exceeds the plant of the soil surface with water evaporates cooling ability in reaching 25～30 ℃ more than [4] P.65 therefore the every strain of occurring in nature being grown up with regard to the cooling angle, moisture in the soil mainly is by vaporization behind the heat of transpiration in having drawn solar radiant energy and surrounding air of plant and goes up the high-altitude, in the condensation phase transition process of high-altitude steam, then can discharge the latent heat of vaporization (wherein directly entering the outer space about half) and be condensed into drop in the upper cloud layer, descend with the raindrop form after the drop aggegation to extraneous space.Said process shows that moisture will inevitably be simultaneously in natural regeneration cycle process passes space-ward with the huge heat on the face of land.Face of land heat has directly determined the temperature levels on the face of land to a great extent by the ratio of the also final space-ward migration of the heat absorption vaporization heat of moisture.Therefore the existence that does not possess the high temperature underlying surface of water evaporates ability in the city should be the main cause that urban area temperature is significantly higher than suburb temperature, and is called as the tropical island effect of urban area.This programme proposes to utilize the huge space of running through main line road top, urban district to set up the water spray pipe network system for this reason, directly carry out artificial spray cooling at high temperature season and should can remedy the urban district equally, the phenomenon that rising ability fails formed water evaporates total amount decline and causes the face of land, urban district mean temperature to raise significantly because of the plant rareness with the natural transpiration that replaces natural plant.
3. summary of the invention
The present invention is chosen in the top of broader through street in urban district and backbone road and sets up the spray cooling grid, a nozzle evenly distributes every about surplus in the of ten meters in pipe network, moisture is sprayed main main line of communication road and pavement, outside superjacent air space thereof more uniformly with fine water cylindricality formula in nozzle, and the cooling of large-scale urban environment integral body is carried out in utilization evaporation of the branch of spraying water on road under the high temperature season burning sun irradiation on daytime.The water-spraying evaporation process mainly is to absorb the heat that is gathered by the form that water droplet contacts with scorching hot road surface and numerous driving vehicle appearance after solar radiation.Each spout injection flow rate system is controlled by near the water sensor that is arranged near the pump house, when injection flow rate is superfluous, the excessive moisture of spray on the sensor receiving surface will flow out through flowmeter and also send the signal that stops to spray water simultaneously, this signal is directly controlled variable-frequency motor and is stopped the rotation, thereby water spray is stopped.
Water pipeline can form one after the water evaporates vaporization and have the lighter steam come-up stream of the proportion of broader amplitude strand and float to higher sky on together for making, so should be erected at above the road of amplitude broad can carry the more waste gas in road top as far as possible.Must guarantee under the lighter prerequisite of deadweight, to have the enough big rigidity of structure across road and across crossbeam between column and longeron for this reason, so crossbeam among the present invention and longeron all adopt the triangular cross section structure that directly is made of aqueduct as shown in Figure 2, arranging the steel pipe of brace summer frame system total amount and double as aqueduct at each place, summit of cross-sectional triangle, then the connecting rod welding with small bore is fixing between three steel pipes.Adopt the right-angle coupler that is connected scaffold to connect between crossbeam and the longeron.Be to save injection flow rate, improve the vaporization efficency of ejection moisture, therefore the wasting phenomenon of avoiding excess moisture to run off all should install corresponding injection flow rate sensor near every exit of pump and control, and institute's injection flow rate can be complementary with road surface actual evaporation at that time.
For guarantee in the water spray process can be by a relatively large margin the adjusting injection flow rate, the step water spray work modulus of periodicity formula water spray that adopts the water spray process to form separately among the present invention by water spraying time and dead time, set water spray Cycle Length (for example 2 minutes) can be adjusted in debug process, when the water yield of injection flow rate sensor monitoring to table top surpasses the evaporability of table top, excessive moisture will flow out by the flowmeter that is arranged on below this sensor, and send a signal of closing variable-frequency motor simultaneously, to stop water spray, water spray will restart in system when directly one-period begins instantly.The water spray Cycle Length is then by debugging to determine its optimum value.
3.1 illustrate
Now specify and adopt the cooling-down effect that can reach behind this programme: be about F=700 square kilometre with interior urban area according to interrelated data Shanghai City Section of Outer Ring Line according to the through street situation in the urban district, Shanghai; Interior ring is arranged in this scope, north and south, Yan'an, Min, Shanghai, many of Yixians etc. are 98 kilometers of the outer shroud through streets of 64 kilometers of four～six-lane overpass that the Shen font distributes and eight lane widths.About motor vehicle day operation amount on the above-mentioned overpass is up to 600,000 [5].This project is considered to set up water pipeline and calculate its major parameter above first-selected above-mentioned several overpass and the outer shroud through street.
Getting water spray area of coverage mean breadth is that B=70m calculates:
The overpass and the Section of Outer Ring Line length overall of setting up water spraying pipeline in the known urban area are L=64+98=162km;
∴ water evaporates district area is F=70 * 162,000=11.3 * 10
6m
2
According in Shanghai City 33 years 6～August the solar radiant energy total amount and 87 in the period of the mean value of sunshine duration in 6～August can obtain the average solar radiation constant in area, Shanghai in above-mentioned month divides
a＝2.61×10
3kJ/hm
2[6]；
The ∴ per hour average solar radiant energy total amount on above-mentioned water spray road is
N＝F×a＝11.3×10
6×2.61×10
3＝29.5×10
9kJ/h
Table look-up as can be known that 24 ℃ of water vapor latent heat are b=2,453kJ/kg[1]
Get 80% of solar energy total amount on the above-mentioned area and be used for transpiring moisture, then the water evaporates total amount should be:
G0=80% * N ÷ b=80% * 29.5 * 10
9÷ 2,453=9.6 * 10
69,600 tons of kg/h ≌/time
Assembled a large amount of driving vehicles on the main through street in above-mentioned urban district, the sprinkling zone that its essence is equivalent to the solar irradiation torrid zone that vehicle absorbs gathering when other road drivings is gone into overpass carries out the water evaporates cooling.A heat of bringing into of picking up the car is equivalent to 20%N.Therefore the evapo tranpiration ability in above-mentioned water spray district is
11,500 tons of G1=(1+20%) * G0=1.2 * 9,600 ≌/time (being equivalent to per hour have the sprinkling truck of 1150 10 tonnes of capacity to work at the same time).
The urban district heat that is absorbed in this water evaporates process is Q1=G1 * b=11,500 * 10
3* 2,453 ≌ 2.82 * 10
10KJ/h, it will return the face of land again towards 50% of the face of land when the radiation condensation will to consider this to be carried to Q1 behind the high-altitude by steam in below calculating, so really can be about from the heat of urban district global migration space-ward
Q2＝50％×Q1＝50％×2.82×10
10＝1.4×10
10kJ/h
The average height of now supposing the cooling influence area after water-spraying evaporation absorbs heat is a H=20 rice, to calculate the corresponding cooling-down effect of this water spray caloric receptivity:
The volume in above-mentioned 700 square kilometres of cooling urban districts is V=F * H=700 * 10
6* 20=1.4 * 10
10m
3
The level pressure thermal capacitance of known air in the time of 20～40 ℃ is c=1kJ/kg.K.m
3
Then Q2 migration back average cooling value in 20 meters height in above-mentioned 700 square kilometres of urban areas is
ΔT＝Q2÷(c×V)＝1.4×10
10÷(1×1.4×10
10)＝1℃
More than calculate and only consider because the direct cooling numerical value of generation of water evaporates heat absorption institute.In fact will drive a large amount of hot-air (at first being the waste gas of a large amount of vehicular emissions) by the form of entrainmenting on every side from this stream thigh by the effect that involves of frictional force when steam rises with extensive stream thigh form moves upward together and leaves the urban district, thereby can therefore can enlarge above-mentioned cooling-down effect significantly in the lower in time a large amount of urban districts that flow into of suburb air of inducing temperature, per hour make the heat of 11,500 tons of water evaporates except that the solar radiant heat on the direct arrival road face of land, still comprise the heat of bringing into by numerous vehicles directly or indirectly in this example.For make these 11,500 tons/time moisture enter nozzle and need the corresponding booster water pump of configuration from nozzle ejection with certain pressure.Power consumption when now calculating water pump operation:
Power consumption calculates: establishes per 2 kilometers a water supply booster pump is set,
Water pump is counted n=(L ÷ 2)=(162 ÷ 2)=81,
Every pump capacity G2=G1 ÷ n=11,500 ÷ 81=142 ton/times
By sample: model IS150-125-315 centrifugal pump: 120～240 tons of flows/time, 34～29 meters of lifts, power 30KW
81 water pump total installed capacity power are N=81 * 30=2,430kw
According to the record of relevant newspaper: (the urban district notion only comprised Huangpu to the urban district, Shanghai at that time when summer high temperature in 2003, the Luwan, Jing'an, the Putuo, Nanshi, the Xuhui, central cities such as Zhabei, only about 289 square kilometres) the corresponding amount of electricity saving that if can turn down when once moving of air-conditioning is 240,000 kilowatt hours [7], therefore as by in the present Section of Outer Ring Line scope during (about 700 square kilometres) conversion, the air-conditioning equipment in above-mentioned 700 square kilometres of scopes of then lowering the temperature 1 ℃ when moving estimates to economize on electricity general power when more than 400,000 kilowatts, also be that water pump only moves 2,430 kilowatts of (only be equivalent to above-mentioned institute saving power 0.6%) electric power per hour can be saved the above air-conditioning electric power of about 400,000 degree, as by spraying water every day 7 hours, calculatings in 3 months of spraying water annual summer, but then every year saves energy up to more than the 2.5 hundred million degree electricity, so adopt this huge conservation measures significant in the rush hour of summer high temperature shortage of electric power.
3.2 spray-pipe system is arranged
Spray-pipe system is by the 1--longeron as shown in Figure 1, the 2--nozzle, and the 3--crossbeam, 4--left and right pillar and column interior conduit form.
The column absolute altitude is taken as 14 meters, and about 14.2 meters of nozzle absolute altitude knows that according to correlated samples nozzle corresponding horizontal range should be 11 ~ 20 meters, at a distance of 20～40 meters distances 1 nozzle is set on every longeron.Longeron and crossbeam are the pipeline framework composition of triangular arrangement by cross section, pipeline enclosure is fixing by connecting the tie-rod welding, each girder space is about 22 ~ 40 meters, therefore the water spray width range is 60～120 meters when 3 longerons are set. according to having a lot of social connections 2～3 longerons are set on the every crossbeam, apart can reach about 70 meters each other between each crossbeam, per kilometer of road is arranged 14 crossbeams approximately, 28 groups of columns.So nozzle amounts to 3 row along the road left and right directions, every row is at a distance of 24 meters, and every kilometer nozzle number is 126 of 3 * (1000 ÷ 24) ≌.Longeron is fixed on the following pipeline of crossbeam by the pipeline right-angle coupler.Pipeline on each member then interconnects by stainless steel flexible hose, and column makes surface of base consistent with the pavement by plug-in mounting back in the prefabricated component on basis with cement mortar.In a heel post aqueduct is arranged, its water inlet is drawn by basic groove, and by threaded for union be embedded in underground delivery main and be connected.
3.3 injection flow rate sensor
The water spray cycle is designed to 2 minutes during debugging.Then determine in the water spraying time length of water spray in the cycle by the injection flow rate sensor.As long as the flowmeter in the sensor does not send signal, the variable-frequency motor that drives water pump is with regard to continuous running.After flowmeter sent signal, variable-frequency motor stopped operating, and water pump also stops water spray simultaneously.
Fig. 2 system is specially for the designed injection flow rate sensor schematic diagram of this project.In Fig. 2: the top 1 of injection flow rate sensor is that a water spray of being made up of grey sheeting is accepted and evaporating surface, and the moisture of spray on grey sheeting then will leak down and the output channel of flow sensor inside and flow out sensors via the flowmeter 2 with signal output function as can not in time evaporating.When flowmeter 2 detected flow value signals, promptly send and stop the signal of spraying water, the variable-frequency motor that at this moment drives water pump promptly stops operating, and water spray stops, and restarts water spray after following one-period begins again.To adapt to the different evaporation intensity fluctuations that caused because of intensity of solar radiation variation etc. constantly, make ground remain humidity and do not have a large amount of excessive moistures to flow to the perfect condition of storm sewer.
4 economic benefits
The room conditioning system adopts electromotor to order about cold-producing medium compressed liquefaction in closed conduct such as freon or ammonia, the vaporization of expanding waits the cyclic process of phase transformation repeatedly to reach indoor heat to be moved to outdoor purpose, because the internal diameter capillaceous for media flow is very thin, therefore the media flow resistance is very big, and the power of consumption is therefore also than higher.Usually the Technological Economy index of aircondition is weighed with coefficient of refrigerating performance, also promptly can move to outdoor calorie value by unit power consumption and weigh its economy.The coefficient of refrigerating performance value that reflects this air conditioner economic index according to Hitachi's air-conditioning specification as can be known is: the 4.6kw heat can be taken away from indoor when per second input 1.73kw electrical power, therefore the electric heat that can move of 1 degree should equal 1kwh=3,600kJ ÷ 1.73 * 4.6=9,572kJ.
The latent heat of vaporization of water is very huge, the latent heat of vaporization of required absorption up to 2465.1 kilojoule/kilograms [3] P.196 when 1 kilogram 15 ℃ aqueous water became 15 ℃ steam, also be from the face of land and absorb above-mentioned 9, the 572kJ heat also makes it to move to the high-altitude and only need evaporate 9,572 ÷ 2465.1=3.9 kilogram moisture, and with air conditioner with indoor above-mentioned heat only short-range move to outdoor promptly need consume 1 the degree electric energy.But, therefore be that 572kJ kilojoule heat is actual should to evaporate 7.8 kilograms of moisture from face of land space-ward migration 9 because steam has 50% left and right sides latent heat still can return the face of land when the condensation of high-altitude approximately.Now calculate the difference of the prime cost expense in these two kinds of different temperature reduction technologies respectively by the market electricity charge and water rate: current Shanghai City electricity price is 0.65 a yuan/degree, and water price is 0.002 yuan/kilogram of 2.41 yuan of/ton ≌.7.8 a kilogram water rate be * 0.002=0.016 unit, therefore when using air-conditioning equipment when the required electricity charge and employing water evaporates equal number heat the cost ratio between water rate be: 0.65 ÷ 0.016=41 times.This shows that its day-to-day operation expense will only be about 2.4% of the electricity charge when adopting with water for the temperature reduction technology of electricity from the face of land to high-altitude migration equivalent amount heat, system directly delivers to extremely thousands of meters high-altitudes of hundreds of rice with the ground heat when employing is dispelled the heat by water evaporates still more, and can make the wherein technical process of the direct radiation direction outer space of the heat about half, thereby will never cause the thermal pollution of architecture enclosing environment.
5 brief summaries
The area, down town that building is intensive is because underlying surface lacks enough moisture evaporation absorbing and cooling temperature mechanism, therefore thereby the mean temperature that causes the urban district underlying surface significantly is higher than suburb underlying surface mean temperature, and causes the temperature of urban district near surface significantly to be higher than the heat island phenomenon of suburb surface air temperature.For solving the higher phenomenon of underlying surface mean temperature that the green coverage deficiency is caused in the urban district.The special proposition with water of the present invention is cooling medium for this reason, is sprayed directly on the main through street of city center high temperature and the cooling method of backbone road top.Vaporization come-up and the steam high-level condensation liquefaction process of moisture in open atmosphere space all belongs to spontaneous physical change process and need not extra power drive, therefore the heat island phenomenon of high temperature on a large scale that has the area, solution down town of cheap and the extensive globality of energy, and the hot waste gas behind the local pollution control of city center can be carried in the lump the high-altitude and under windage, float towards the suburb simultaneously, strengthen urban district and the convective motion of air between the suburb on every side, the diffusion and the renewal speed of promotion urban district vitiated air thereby can also play.Point out regeneration rule in passing according to occurring in nature moisture, to deeply return the sky, hinterland from the steam of urban area, the numerous strand of China evaporation come-up again in the leading major part down of southeaster in summer, and significantly increase its recycling number of times with the fresh water form after purifying once more by the rainfall form, therefore reasonable use of the present invention will have the very important meaning that can make numerous fresh water that are about to flow into the sea can in time obtain regeneration rapidly and return the innerland, continent again simultaneously.
Description of drawings
Fig. 1 is arranged in main traffic artery to be sprayed water and the adjacent pavement of two sides thereof, the water pipeline net system schematic of greenbelt top; Fig. 2 is the schematic diagram of injection flow rate sensor.
7 notes
[1] Tong Jungeng, Lu Wancheng compiles " thermal basis ", publishing house of Shanghai Communications University calendar year 2001,
[2] Liu Renda chief editor " metallurgical furnace thermal basis " metallurgical industry publishing house, 1980
[3] chief editor of collective of Beijing Agricultural University, " agricultural weather ", Chinese agriculture publishing house 1978,
[4] Huo Mingyuan, the Zhang Zengshun chief editor, " natural resources of China ", and higher education publishing house, 2001,
[5] Zhao Jianxin, Zhang Haijun, scientific and technological magazine is built, 2005,04 phases in " problem and countermeasure that overpass system in Shanghai City exists " Shanghai
[6] Shanghai weather bureau, " Shanghai climography ", Shanghai Academy of Social Sciences publishes, and 1997
[7] " Liberation Daily " on August 3rd, 2003.
Claims (3)
1. the broader through street and the top of backbone road are provided with spray-pipe system along the urban district.It is characterized in that: the crossbeam that is set up above the spray-pipe system column and the cross section of longeron are triangle, vertex of a triangle system is made of steel pipe, have the integral body of enough rigidity with formation between each steel pipe and by welding small bore connecting rod, then adopt right-angle coupler to be connected between crossbeam and the longeron.
2. the water spray feature of above-mentioned spray-pipe system is: the water spray process is discontinuity, each water spraying time and correspondingly stop the cycle that the water spraying time mutual group becomes a regular length.By the method for the frequent break-make of direct control variable-frequency motor as the control injection flow rate, when the injection flow rate sensor in being arranged on the spray district sends signal, the variable-frequency motor that drives water pump stops operating immediately, therefore each nozzle all stops water spray, thereby controlled should be in the cycle injection flow rate, and restart water spray when beginning again from following one-period.
3. injection flow rate sensor as shown in Figure 2, it is characterized in that: be that a water spray of being made up of grey sheeting is accepted and evaporating surface at the top 1 of injection flow rate sensor, the moisture of spray on grey sheeting will flow in the flowmeter 4 that is arranged in the sensor from the cotton back side as can not in time evaporating then.Flowmeter 4 has the signal output function, when detected current by the time send immediately and stop the signal of spraying water, at this moment the variable-frequency motor that drives water pump stops operating immediately, each is organized nozzle and also stops water spray simultaneously, variable-frequency motor rotates once more and restarts and sprays water when following one-period begins, thereby actual water spray process can in time be stopped according to the signal that this flowmeter sends all the time, and after following one-period begins, restart water spray again.
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| CN105879522A (en) * | 2014-09-17 | 2016-08-24 | 国家电网公司 | Intelligent power network-based northern basin city dry-type haze treatment method |
| CN109778620A (en) * | 2017-11-13 | 2019-05-21 | 宝马汽车股份有限公司 | Water circulation in transportation system |
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| CN109778620A (en) * | 2017-11-13 | 2019-05-21 | 宝马汽车股份有限公司 | Water circulation in transportation system |
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Application publication date: 20101103 |