Time monitoring system for oil product settling at storage tank sections considering shape of contaminating particles and distribution of oil product temperature along tank height. RU patent 2520323.
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 Method for automatic structuring of computer codes adequate for processed information / 2257611Method includes performing a block of operations along N1 channels, where N1 is selected from 1 to 2256, wherein received information is separated on logically finished fragments, encoded on basis of preset algorithm, to produce a block of N-dimensional sets adequate for converted source information Aj with elements like {Bm, X1, X2,...,Xn}, where j - order number of set in range from 1 to 2256, Bm - identifier, X1-Xn - coordinate of element from its coordinates center, m and n are selected from 1 to 2256; received block of sets is compared to already accumulated and/or newly produced sets from multiple channels, intersecting portions of sets are found and cut out; after that cut intersections and sets remaining after cutting are distributed among databases, placing each same set into database appropriate for it and each of sets different with some parameter to databases appropriate for them and identifiers of databases storing these sets are substituted in place of cut sets. |
 Aircraft electronic display complex / 2264953Proposed complex includes two control onboard digital computers, port, central and starboard multi-functional color displays, collimator display on windshield and multi-functional control panel combined by multiplex information exchange channel, local all-round information exchange channel, first and second local radial information exchange channels, thus forming integral information system. Connected to this information system are system of mode parameter sensors, power supply system, generator subsystem and storage battery. Both onboard digital computers are connected by means of inter-computer information exchange channels. Proposed complex is also provided with TV image switching unit connected with multi-functional color displays for transmission of TV image. |
 System for protecting competitive offers in governmental purchases / 2265883System has block for receiving applications for participation in competition, block for selection of support address of providers in database, block for identification of limiting values of number of competitions, block for modification of addresses of server database, block for identification of competition codes, block for identification of electronic digital signatures of providers, OR element, block for data receipt of server database, block for selecting number of competitions participants, block for controlling selection of applications, block for controlling reading and recording of database, block for launching competitions procedure, block for selecting addresses of applications of providers in database, block for identification of closed encryption keys, register and block for outputting confirmations to providers. |
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FIELD: oil and gas industry.
SUBSTANCE: system contains modules for basic address identification of midsection coefficient, basic address identification of oil product separation, basic address identification of the tank page and basic address identification of the tank height section; a signal shaping module for midsection coefficient reading; a signal shaping module for the tank section parameters reading; a signal shaping module for the tank section parameters registering; a signal shaping module for call of a subprogram for calculation of the rate of contaminating particles settlement; a module registering the rate of contaminating particles settlement; a module for an average value correction for the rate of contaminating particles settlement at the tank section; a module comparing rates of contaminating particles settlement with the standard settlement rate; a signal shaping module for settlement time code reading at the tank sections; modules of registration and display of settlement time codes at the tank sections.
EFFECT: expansion of functional capabilities of the system due to the function of analysis and processing of contaminating particles of any shape.
2 tbl, 15 dwg
The invention relates to the computer engineering, in particular to the monitoring system time defending oil in parts of the storage tank with regard to the form of particles of pollution and temperature distribution of oil in a reservoir height that implements the use of new information technologies in oil product storage.
One way to clean fuel from mechanical impurities is defending. Preliminary sedimentation fuel can reduce a significant amount of mechanical impurities and water droplets before fuel filtration. The efficiency of sedimentation depends on its duration and from viscosity and density of the fuel, on the nature of the material particles of pollution, their weight, size and shape. The higher the viscosity and density of the fuel and the lower the degree of correspondence form analyzed particle pollution in the form spherical, the slower deposited particles of mechanical impurities and water droplets and therefore the greater the time required for assertion of fuel.
Standard on the defense of the fuel in the tanks of fuel services is established by order of the Department of air transport of the Ministry of transport of the RSFSR № DV-126 from 17.10.1992, and is 4 hours on 1 meter level. This standard corresponds to the speed of sedimentation of particles of mechanical impurities within ~0,07 mm/S. However, this standard does not take into account not only the density of contamination particles, their size and shape, but also the density, viscosity and temperature of the fuel itself.
In [3] is theoretically substantiated study of the processes of sedimentation of fuel in the tanks. This the result shows that the velocity V is o (the Stokes formula) particles of pollution in the aviation fuel depends on: radius r C particle contamination density p C particle contamination density p T and viscosity g of the Tons of fuel
V 0 = 2180 C 2 γ T ( p C p T ) . ( 1 )In turn, and the fuel density p T , and the viscosity of the fuel g of the T is a function of temperature t of fuel:
p T = p 20 - ( 0,8205 - 0,00013 x p 20 ) x ( t - 20 ) , ( 2 ) γ T = 1,8742 - 0,0362 t + 0,0007 t 2 - 10 - 5 t 3 - 10 - 7 t 4 - 10 - 7 t 5 + 10 - 10 t 6 , ( 3 )where: t - the current temperature of fuel, p 20 - density fuel at a temperature of +20 C, specified in the passport on fuel (t=+20 C temperature standard atmospheric conditions for aviation fuel).
Since the formulas (1)-(3) fair for motor fuels, related to light petroleum products and liquid petroleum oils for special purposes [4], then all further arguments will build for oil products.
Given this, the determination of the allowable time advocate of oil for each tank of fuel service can only be determined from consideration of the peculiarities of the temperature distribution of oil product at a height of each tank.
For this graph of the temperature distribution of oil in a reservoir height is divided into separate sections. As of the end (the end) points plots are considered point of the graph, in which the temperature measurement of oil products with a special monitoring system of parameters of oil in a reservoir height (not shown).
Each segment received split schedule is characterized by the values of the temperature on its borders. The temperature of the bottom border of one of the area equal to the temperature of the upper adjacent bottom of the plot.
The breaking of the tank into sections allows you to more closely follow the changes in the speed of the particles of oil product pollution, and consequently, and to define more precisely the time of his assertion.
To do this, by the formulas (1)-(3) for each boundary temperature in the selected area of the reservoir are determined by the settling velocity of the particle pollution. Interpreting next, the rate of sedimentation of particles of pollution, obtained for the temperature of the upper boundary of the area of the reservoir, as the speed of entering the area of the reservoir, and the speed of sedimentation of particles of pollution, obtained for the temperature of the bottom border of a site of the reservoir, as the speed of the exit section of the tank, calculates the average speed of the particles of pollution in this area of the tank. The average speed of the particles of pollution on each section of the tank is then adjusted by multiplying each time on a certain characteristic forms analyzed for particle pollution.
To do this based on the concept of "particles" as "the degree of accuracy of the structure or topography particles (usually the correct form of the particles are spherical)" in accordance with GOST R 51109-97 adopted by the Decree of Gosstandart of Russia from 17.12.1997, №413 and is in force since 01.01.1999,, introduces definitions [5]:
- middle section of the particle - "the area of the projection of a particle on a plane normal to the direction of motion of the particles, which determines the drag motion of the particles in the fluid flow";
- coefficient middle section - "the ratio of the area fuselage mid-section to the area of a circle, the diameter of which equal to the largest size measured particles".
The coefficient fuselage mid-section k, which is the characteristic form of particle pollution, changes within
0 < k ≤ 1, ( 4 )k=1 - particle correct (spherical) shape;
0<k<1 for particles which form does not match the spherical form.
The degree of correspondence form of spherical particles form is specified by the value of the value of coefficient k fuselage mid-section. The higher the degree of conformity of the form analyzed the form of spherical particles, the closer the value of its coefficient k fuselage mid-section 1. Conversely, the lower the degree of correspondence form analyzed the form of spherical particles, the closer the value of its coefficient k fuselage mid-section to 0.
Since the formulas (1)-(3) only valid for spherical particles, for the application of these equations for particles of any other form in [6, p.64] from the condition of equality of the speed of sedimentation of a spherical particle pollution diameter d EQ and arbitrary particle pollution of the same nature with maximum linear size l max and characteristic form factor middle section) k the formula
d E. to in = l max k , ( 5 )where d EQ - the equivalent diameter of a spherical particle pollution, l max - maximum linear size is not spherical particles of pollution, k - the coefficient of the middle section is not spherical particle pollution.
Thus the factor fuselage mid-section k is not spherical particle pollution also has a function of l max [6, s]
k = 1 - 8,45 x 10 - 2 l max - 1,25 . ( 6 )In accordance with formulas (5) and (6) particle pollution (type quartz) of arbitrary shape with maximum linear size l max will be moving (settling) toward the bottom of the tank with the same fast as a spherical particle diameter d EQ .
From the point of view of safety the greatest interest is the problem of determining the time of defending oil in storage tanks for particle pollution (type quartz) of arbitrary shape and size of the form
l max & GE; δ , ( 7 )where l max =2r C (r, R - the radius of the particle pollution), δ (table 1) assembling the gap between the spool and sleeve for various regulatory elements pump control aircraft GTE [7].
Table 1 No. p/pSpool pair teploreguliruth equipment aircraft GTE
The gap, δ [mkm]
1Butterfly valve - Bush
8-12 2The valve pressure - Bush
7-9 3The control valve sleeve
10-14 4The stock of gidrotalzita - coupling
6-8 5Plunger - sleeve
15-22 6Valve relief valve - Bush
5-8Be aware that particle pollution (type quartz) size of 5-10 microns have very low sedimentation rate in connection with the manifestation of sedimentation-diffusive equilibrium, when the velocity of the Brownian motion is approaching the speed of sedimentation (sedimentation). Therefore, to remove these particles after sedimentation of oil products in reservoirs used filtration system with filtration of less than 3 microns.
Taking this into account and in accordance with table 1 values of l max in formula (7) is taken equal 12-22 mm.
Taking maximum linear size of the particle pollution (type quartz) of arbitrary shape
l max = 2 r C ( 8 )and substituting it into (5), we obtain that the radius of the equivalent of a spherical particle pollution has the form
r E. to in = r C k . ( 9 )Then, in accordance with (1) sedimentation rate spherical particles of pollution equivalent radius r EQ has the form
V 0 ( r E. to in ) = 2180 x r E. to in 2 γ T ( p C p T - 1 ) . ( 10 )Substituting (9) into (10), we obtain that
V 0 ( r E. to in ) = 2180 x r C 2 γ T ( p C p T - 1 ) x k . ( 11 )From (11) taking into account (1) and (8) we obtain that
V 0 ( d E. to in ) = V 0 ( l max ) x k , ( 12 )where V 0 (d EQ ) - sedimentation rate spherical particles of pollution equivalent diameter equal to the speed of sedimentation of particles of pollution with maximum linear size l max and coefficient fuselage mid-section k (condition (5)), 0 V (l max ) - sedimentation rate spherical particle pollution diameter l max , k - the coefficient fuselage mid-section of particle pollution with maximum linear size l max .
From the expression (12) it follows that the speed of sedimentation of particulate pollution (type quartz) of any arbitrary shape with maximum linear size l max and coefficient fuselage mid-section k is a factor in the settling velocity of a spherical particle contamination of the same nature with a diameter of l max factor fuselage mid-section k, corresponding form of spherical particles with the greatest linear size l max.
According to (12) average sedimentation rate for each particle pollution of arbitrary shape with maximum linear size l max and coefficient fuselage mid-section k in each area of the tank can also be represented as the product of average sedimentation rate spherical particle pollution diameter l max factor fuselage mid-section k is not spherical particles with the greatest linear size l max
Knowing the height of each section of the tank, can ratio of the height of the considered area to the average speed of the particles of pollution in this area to determine the time of particles in this area. The total sum of the received time intervals settling in all areas of the tank and will characterize the estimated time of defending oil in the tank.
In this regard, it is reasonable to create such an automated system that would allow to identify the readiness of oil in storage tanks to the issuance of the speed of sedimentation of particles of pollution (type quartz) of arbitrary shape in each area of the tank and give time defending as for each individual area of the tank, and the tank.
Known systems that could be used to solve the tasks [1, 2].
The first of known systems includes the Central processor module, the inlets of which are connected with the memory modules and the modules of preparation and input, and outputs are connected to the corresponding memory modules, the module is processing data, information input of which is connected to the outputs of the relevant modules of memory, clock inputs are connected to the control outputs of the Central processor module, and the module output is an information system output [1].
A significant disadvantage of this system is its low performance, due to the fact that the procedures analytical processing is implemented through data search through the whole database that for large volumes database inevitably leads to unnecessarily high time for analytical evaluations.
Known and another system that contains the identity module base address section of the oil product, identity module base address of the page of the tank, the module of the signal conditioning read the section of the tank, the registration module parameters of the plot tank module the signal conditioning call subroutines of calculation of the rate of sedimentation of particles of pollution oil registration module settling velocity of the particles of oil product pollution, the module selection average on area of reservoir sedimentation rate particle pollution with petroleum products, module compare the average on area of reservoir sedimentation rate particle contamination of the oil with the regulatory sedimentation rate, identity module base address of the height of the area of the reservoir, the module of the signal conditioning reading of the middle section of the tank calculation of the allowable time defending oil registration module middle section of the tank calculation of the allowable time advocate of oil product delivery module settlement acceptable time advocate of oil product [2].
The last of the above technical solutions closest to the described in the application technical solution.
Its disadvantage is narrow functional capabilities of the system, limited analysis and processing of particle pollution only correct (spherical) shape, and that causes the exception to the analysis of the process of sedimentation pollution particles of arbitrary form deposited with the same size is significantly slower spherical that leads to distortion of the assertion of oil products as at each place on the tank, and throughout the tank.
Purpose of invention - expansion of functional possibilities of system, allowing in the process of sedimentation of oil product in the storage tank to analyze and process the contaminates not only the right (spherical) shape, but also any other particles of arbitrary shape.