RU137525U1 - AUTOMOBILE FUEL REALIZATION SYSTEM AT Filling Station - Google Patents

Abstract

1. A system for selling automotive fuel at a gas station (gas station), comprising: a fuel dispenser (fuel dispenser) configured to measure and dispense the volume of fuel sold; a data processing unit configured to determine a fuel temperature distribution in a gas station system and determine, based on said distribution of fuel temperature in the gas station system, the temperature at the inlet to the fuel dispenser, which is taken as the correcting temperature; a correction unit connected to the fuel dispenser and to the processing unit is given s, configured to perform the correction realizable fuel volume correction based on the detected temperature data prichemblok determines temperature distribution in the fuel filling station system based at least predetermined data following: parameters of the pipeline, providing the fuel supply to the dispenser; temperature of the soil in which the pipeline is located; fuel temperature at the inlet to the pipeline and fuel parameters. 2. The system according to claim 1, in which the correction unit is configured to operate either in an automatic or in an automated mode. The system according to claim 1, wherein the data processing unit is configured to use at least one of the type of fuel, type of fuel, or density of the fuel when determining the temperature distribution of the fuel in the gas station system. The system according to claim 1, in which the data processing unit is configured to use at least one of: the temperature of the ambient air, the volume, to determine the distribution of fuel temperature in the gas station system

Description

The technical field to which the utility model relates.

The utility model relates to measuring equipment, namely, to the field of measuring the volume of automobile fuel sold, and is intended, in particular, for dosing the volume of fuel sold at gas stations with adjustments that take into account the distribution of fuel temperature in the gas station system and thereby improving the accuracy of dispensing the volume of sold automobile fuel.

State of the art

Analysis of the current level of technology in this field showed the following. Currently, the sale of petroleum products (diesel fuel, gasoline, fuels and lubricants) to the consumer is regulated by the “Instruction on the procedure for receipt, storage, dispensing and metering of oil and petroleum products at oil depots, filling stations and gas stations of the USSR Goskomnefteprodukt system” dated August 15, 1985 ., No. 06 / 21-8-446. In accordance with the requirements of this Instruction with amendments and additions (letter No. 04-21 / 760 dated 11/30/1987), oil products are recorded at oil depots and filling stations in mass units, and oil products are sold and registered at gas stations (gas stations). in volume units (liters).

Petroleum products are dispensed to consumers at gas stations through fuel dispensers (fuel dispensers) in volume units, regardless of seasonal temperature fluctuations during the year. Accordingly, the price of petroleum products is set in rubles per liter, regardless of the actual temperature of the fuel sold, and the measuring device of the fuel dispenser is always set to output volume at a temperature of t = 20 ° C, according to MI 2895-2004, Fuel-dispensing columns. The method of periodic calibration by measuring devices with special scales. "

However, it is known that the volume of most physical objects, including liquids, depends on temperature, and most of the objects expand when heated and contract when cooled. This is also true for liquid fuels, in particular motor fuels such as gasoline or diesel.

Accounting for automobile fuel during its sale at gas stations is usually carried out in units of volume: liters, gallons, etc. Hereinafter, metric units will be considered, although it is understood that non-metric units can be used in the framework of this utility model.

Due to temperature changes in volume, the mass and energy efficiency of fuel dispensed at different temperatures will differ, for example, the mass and energy efficiency of one liter of fuel dispensed at 20 ° C will differ from the mass and energy efficiency of one liter of fuel dispensed at 5 ° C.

When the temperature changes by 1 ° C, the volume of gasoline changes by 0.11%, and diesel fuel - by 0.08% (obtained from GOST 3900-85). This leads to the fact that the energy and mass content in a unit volume of gas dispensed through the fuel dispenser at t = 20 ° C is 2.2% lower than the energy and mass content in the same unit volume of gas dispensed through the fuel dispenser at t = 0 ° C.

To account for this effect, there are a number of solutions in which it is proposed to use temperature correction of the sold fuel volume, leading the volume to a standardized temperature, based on the correcting temperature of the fuel.

A known method for detecting the amount of fuel during refueling (US patent US 7353703 B2, publ. 2008-04-08, applicant: FAFNIR GmbH [DE]), comprising the steps of measuring the amount of fuel directed towards the car during refueling; measure fuel temperature; correct the measured volume to predetermined temperature conditions by means of the measured temperature, the correction step being carried out in the control unit for the gas recirculation system. In one aspect, the method is characterized in that during correction, the measured volume is multiplied by the quotient of the density of the fuel at the measured temperature and the density of the fuel at a predetermined temperature.

The disadvantage of this invention is that it uses temperature sensors located in the immediate vicinity of the sold automotive fuel, which reduces the safety of the fuel dispenser, thus, the introduction of additional sensors reduces reliability and leads to more expensive fuel dispensers in gas stations.

A known method of selling petroleum products to the consumer (RF Patent RU 2326011 C2, published January 20, 2008, applicant: Ivanov Georgy Aleksandrovich (RU)), according to which petroleum products are sold in units of volume, characterized in that the product is produced taking into account the actual temperature of the oil product, and the dose at a temperature of 20 ° C is changed to volume at the actual temperature by determining the average temperature of the oil in the buried tanks according to the season, in accordance with the established average temperature The rum of the measuring unit changes the volume of the dose of the oil product dispensed by the fuel dispenser.

The disadvantage of this method is that the temperature of the oil is taken into account only in the buried tanks, it is obvious that the temperature of the oil in the buried tank can significantly differ from the temperature of the oil discharged through the fuel dispenser, that is, this solution does not take into account the change in the temperature of the oil in the elements of the gas station system, for example , in the pipeline connecting the buried tank and fuel dispenser, which does not allow us to provide sufficient accuracy for taking into account the temperature change in volume oh car fuel.

The closest in technical essence and the achieved result to the claimed utility model is a temperature-compensated fuel distribution device (US 5557084, published September 17, 1996, applicant: GILBARCO [US]), which discloses: a device for distributing liquid fuel and measuring the distributed amount according to a temperature-compensated volume measurement, comprising: a housing having a fuel-related part and an electronics part, and a partition between a fuel-related part and an electronic part, a plurality of fuel channels in passing through said fuel-related part, each said channel having a flow meter for measuring the amount of fuel flowing through the channel, and a temperature sensor configured to read the temperature of the fuel flowing through said channel, each of said meters being connected through a first an electrical circuit for transmitting an electrical signal showing a volumetric flow through its respective channel to said electronics part, each of said sensors is connected by a second circuit for transmitting an electrical signal indicating the temperature of the sensor to said second circuit, the second circuit having a substantially safe passage through a partition to the electronics part, and the electronics in said electronics part includes a computing device connected to said circuits for receiving mentioned electrical signals and to change the electrical signal indicating the volumetric flow, taking into account the temperature.

The disadvantage of this invention is that even when using intrinsically safe and explosion-proof sensors, the safety and reliability of the fuel dispenser is reduced and the cost of the fuel dispenser of a gas station increases.

Utility Model Disclosure

A system for selling automotive fuel at a gas station in units of volume is provided, in which the volume sold is adjusted for the temperature distribution of the fuel in the gas station system, taking into account at least the parameters of the pipeline supplying fuel to the fuel dispenser; temperature of the soil in which the pipeline is located; and fuel parameters.

The technical result to which the claimed utility model is aimed is to increase the accuracy of tempering of the volume of automobile fuel sold through the fuel dispenser, and to ensure constant energy and mass fuel content at various temperatures, without increasing the explosion and fire hazard of the fuel dispenser.

In one aspect of the utility model, a system for selling automotive fuel at a gas station (Filling Station) is disclosed, comprising: a fuel dispenser (fuel dispenser) configured to measure and dispense a sold fuel volume; a data processing unit configured to determine a fuel temperature distribution in a gas station system and determine, based on said fuel temperature distribution in a gas station system, an inlet temperature of the fuel dispenser, which is adopted as a correction temperature; a correction unit connected to the fuel dispenser and to the data processing unit, configured to correct the actual fuel volume based on a certain correction temperature, the data processing unit determining the temperature distribution of the fuel in the gas station system based on at least the following predefined data: parameters a pipeline providing fuel to the fuel dispenser; temperature of the soil in which the pipeline is located; fuel temperature at the inlet to the pipeline and fuel parameters.

In additional aspects, it is disclosed that the correction unit is configured to operate in either automatic or automated mode; the data processing unit is configured to use at least one of: the type of fuel, grade of fuel, or density of the fuel when determining the temperature distribution of the fuel in the gas station system; the data processing unit is configured to use at least one of: determining the temperature of the fuel in the gas station system: ambient temperature, sales volume, sales intensity; the data processing unit is configured to determine the temperature distribution of the fuel in the gas station system analytically, by modeling, based on statistical data, empirical data, or using a combination thereof; statistics are at least one of the statistics of soil temperature, statistics of the temperature of the fuel at the inlet to the fuel dispenser, the temperature of the fuel in the underground tank; a data processing unit is configured to determine an average temperature distribution of a fuel in a gas station system over a period of time; a data processing unit is configured to determine a fuel temperature distribution in a gas station system for an average seasonally; the data processing unit determines the temperature distribution of the fuel in the gas station system for the season average for a particular brand of gasoline and on its basis determines the temperature correction for a particular brand of gasoline average for the season; the data processing unit is configured to use at least one of: the length of the pipeline, the cross-sectional area of the pipeline, the thickness of the walls of the pipeline, the thermal conductivity of the walls of the pipeline, the geometry of the pipeline when determining the temperature distribution of the fuel in the gas station system.

Brief Description of the Drawings

Figure 1 - A simplified view of a system for selling automotive fuel at a gas station.

Figure 2 is a block diagram of a system for selling automotive fuel at a gas station.

Utility Model Implementation

The density of different grades of gasoline measured at a temperature of 15 ° C varies from 0.725 g / cm ³ to 0.78 g / cm ³ , (GOST R 51105-97), table 1 of the change in the density of gasolines for different temperatures is shown below (obtained from the density translation table according to GOST 3900-85).

If we calculate how much the density of the lightest gasoline changes on average with decreasing temperature (K ₁ = 0.0008925 g / cm3 per 1 ° C), and compare with how much the density of the heaviest gasoline changes on average (K ₂ = 0 000785 g / cm3 per 1 ° C), it can be seen that the temperature correction coefficient K for gasolines of different densities is significantly different (by 12%). Thus, neglecting the density of a particular brand of gasoline leads to the appearance of an additional error in the measurement of volume.

Table 1. Change in gasoline density for different temperatures Temperature
measurement ° C The measured density, g / cm3 -twenty 0.6643 0.7486

-fifteen 0.6689 0.7528 -10 0.6735 0.7569 -5 0.678 0.7609 0 0.6825 0.7649 5 0.687 0.7687 10 0.6914 0.7726 fifteen 0.6957 0.7763 twenty 0.7 0.78

It is easy to calculate the relative error 5 of measuring the volume of gasoline (the additional measurement error that appears if the brand of gasoline is not taken into account) if the average temperature correction coefficient K '= (K ₁ + K ₂ ) / 2 = 0,00083875 is used for all fuels We use the well-known formula for the relative error:

where ρ is the true density, ρ 'is the measured density, ρ ₂₀ is the tabular density of the measured oil at 20 ° C, ΔT is the temperature difference between 20 ° C and the measurement temperature, K is the temperature correction for the measured oil.

Thus, if we measure the volume of the lightest motor gasoline using the average temperature correction K ', we get the error

The error calculated by this formula for different temperatures is presented in tabular form below.

From table 2 it is seen that, if the measurement of gasoline volume is carried out without taking into account the density of the brand of gasoline, then in winter when measuring outdoors there appears a systematic measurement error, which in most cases is higher than the permissible error of the M2r-10-SShKM measuring device, equal to ± 0 , 1% (GOST 8.400-80).

Table 2. Volume measurement errors at various temperatures ΔT, ° C δ,% 0 0

one 0.008 10 0,076 twenty 0.15 thirty 0.222 40 0.29

From the above it is obvious that to ensure the required accuracy of volume measurements, it is necessary to carry out temperature correction of the volume sold at gas station gasoline, taking into account the brand of gasoline.

The density of different grades of diesel fuel measured at a temperature of 20 ° C also varies: from 0.83 g / cm ³ to 0.86 g / cm ³ (GOST 305-82), while changing the density of diesel fuel at different temperatures can be estimated according to the density translation table according to GOST 3900-85. If an evaluation of the temperature correction coefficients for diesel fuel similar to that described above for the various grades of gasoline, it can be shown that the coefficient of the temperature correction corresponding to a change in density when changing the fuel temperature by 1 ° C, for very light fuel oil is K = 0.0007025 _1D g / cm3, and for the heaviest - K _2D = 0.000675 g / cm3. In other words, the temperature correction coefficient K _D for diesel fuel of different densities is significantly different (by 3.9%). This difference leads to the appearance of an additional error in the measurement of volume, if the density of a particular brand of diesel fuel is not taken into account. This shows that, like gasolines, to ensure the required accuracy in the implementation of the volume of diesel fuel, it is also necessary to carry out temperature correction taking into account the brand of diesel fuel.

A simplified view of a system for selling automotive fuel at a gas station is shown in FIG. According to figure 1, the gas station contains a fuel dispenser 1, which is connected to the underground reservoir 3 by means of a pipeline 4. It should be noted that the objects in figure 1 are depicted without scaling.

The accuracy of the fuel volume dispensed through the fuel dispenser is significantly affected by the distribution of the temperature of the fuel in the gas station system, which depends on the temperature of the fuel in the underground tank, the parameters of the pipeline connecting the underground tank and the fuel dispenser, as well as the fuel parameters, including, for example, fuel, brand of fuel, fuel density. Therefore, all these parameters should be taken into account when adjusting the volume of fuel sold at gas stations.

Let us evaluate the effect of an underground reservoir on the distribution of fuel temperature in a gas station system. For simplicity, we consider the case when the underground reservoir is initially empty and has a temperature equal to the temperature of the soil in which it is located. When filling the underground tank with fuel having a temperature different from the temperature of the underground tank, the heat transfer process begins and after some time the temperature of the soil, underground tank and fuel will become the same and very close to the temperature of the soil, since the thermal energy of the soil is incommensurably greater than the thermal energy of the underground tank and fuel in the underground tank.

However, the time during which the fuel temperature becomes equal to the temperature of the soil, in practice, can be quite large, and situations are quite likely when this alignment does not occur. Because until the moment of leveling all the fuel in the underground tank can already be sold, or by this time new fuel will be pumped into the underground tank, which has its own temperature.

At least the factors affecting the leveling time are factors such as the capacity of the underground tank, the initial temperature and heat capacity of the fuel injected into the underground tank, the thermal conductivity of the walls of the underground tank, the thermal conductivity of the soil, and the temperature distribution over the depth of the soil.

In addition, in the case of a large volume of the underground tank, a noticeable difference in fuel temperature appears over the volume of the underground tank, which also affects the temperature of the fuel dispensed.

Taking all these numerous parameters into account is rather complicated and at the same time does not give the expected increase in the accuracy of fuel dispensing for the following reason: the underground tank is connected to the fuel dispenser by means of a pipeline with a small cross section, and, therefore, the fuel changes significantly more when moving along the pipeline from the underground tank to the fuel dispenser its temperature under the influence of soil temperature than when it is in an underground tank.

That is, the temperature of the fuel in the underground tank directly affects only the temperature of the fuel at the entrance to the pipeline, and it is enough to take it into account only in this aspect.

Thus, the central element that most affects the temperature of the fuel dispensed is the pipeline.

The temperature of the fuel at the inlet to the pipeline can be determined both by means of a sensor, which is the most accurate way, and by accepting equal to the temperature of the soil in which the underground tank is located, or by taking the temperature of the fuel that it had when pouring into the underground tank. The second option is advisable to apply when the fuel has been in the underground tank for a considerable time, the third option is when the fuel has recently been poured into the underground tank.

Knowing the temperature of the fuel at the inlet to the pipeline, the parameters of the pipeline, the parameters of the fuel and the temperature of the soil in which the pipeline is located, we can solve the problem of distributing the temperature of the fuel through the pipeline and based on it find the temperature of the fuel at the outlet of the pipeline, which is equal to the temperature of the fuel at the inlet to the fuel dispenser . Thus, the temperature distribution in the gas station system in the context of this application is directly related to the temperature distribution in the pipeline connecting the underground reservoir and the fuel dispenser.

The task of determining the temperature distribution in the system is a typical task of thermophysics, methods for solving it are well known and described in the specialized literature and educational literature, a specific method for determining the temperature distribution is not essential in the framework of the claimed utility model.

Based on input, in particular, such as the temperature of the fuel entering the pipeline; pipeline parameters, such as, for example, pipeline material, pipeline heat capacity, its length, cross-sectional area, wall thickness, location geometry; soil temperature; fuel parameters, such as type of fuel, density, grade, heat capacity, by any suitable method, the problem of determining the distribution of fuel temperature in a gas station system is solved. As the soil temperature, data on the distribution of soil temperature over the depth can be used, or for a more approximate solution, some average value of the soil temperature can be used, for example, along the depth of the pipeline. Additionally, other soil parameters may be used, for example, heat capacity, thermal conductivity.

The task can be reduced to obtaining an analytical expression or creating a model, and some of the data for the analytical expression or model can be obtained from the corresponding sensors, and part is taken from the passport data of the corresponding elements of the system, part of the data can be statistical data, for example, statistical data of soil temperature, statistics of fuel temperature at the inlet to the fuel dispenser. Statistical data can be obtained both from the authorities conducting relevant statistics, and directly at the gas station by maintaining such statistics.

It is especially necessary to note that there is no need to solve the problem of determining the temperature distribution of the fuel in the gas station system completely, it is enough to solve it only for the gas station point corresponding to the point of entry of the pipeline into the fuel dispenser. The value of the distribution of the fuel temperature at this point will be equal to the correction temperature, which should be taken into account for the correction of the fuel volume realized by the fuel dispenser.

The processing unit that determines the temperature distribution of the fuel in the gas station system can be any hardware or software-hardware tool that can, based on input parameters, solve the thermophysical problem of determining the temperature distribution in the system, in the particular case, determine the temperature distribution of the fuel in the gas station system and determine based on this distribution of correction temperature equal to the temperature of the fuel at the outlet of the pipeline. The processing unit works on the basis of an algorithm (methodology), which can be developed in accordance with existing standards, norms, guidelines, GOSTs and others, and can also supplement them.

This solution allows you to increase the accuracy of measuring the volume sold and at the same time to avoid the use of sensors in explosive blocks of the gas station system or to reduce their number (sensors can be used only in one underground tank, and not in each fuel dispenser). An exact and rigorous solution to the problem of the distribution of fuel temperature in a gas station will provide the most accurate determination of the temperature at the inlet to the fuel dispenser - the correcting temperature.

In order to simplify the methodology for determining the correction temperature, one or more of the following assumptions can be made:

- the average temperature between the temperature of the soil at the depth of the first end of the pipeline and the temperature of the soil at the depth of the second end of the pipeline is taken as the temperature of the soil in which the pipeline is located;

- either a straight pipeline, or a pipeline with one L-shaped bend, or some other obvious simplification of the geometry of the pipeline, simplifying the calculation of the temperature distribution in the gas station system, is taken for the geometry of the pipeline;

- in the fuel parameters only one fuel parameter is taken into account, for example, fuel grade.

According to one embodiment of the utility model, a method for selling automotive fuel at a gas station includes the steps of:

- determine the temperature distribution of the fuel in the gas station system, using the data processing unit;

- on the basis of a certain distribution of the temperature of the fuel in the gas station system, the temperature at the inlet to the fuel dispenser (SEC) is determined, which is taken as the correcting temperature;

- measure the realized fuel volume by means of fuel dispensers;

- based on the correcting temperature, correct, by means of the correction unit connected to the fuel dispenser, the realized volume of fuel;

- release the corrected amount of fuel;

moreover, the temperature distribution of the fuel in the gas station system is determined on the basis of at least the following predefined data: parameters of the pipeline supplying fuel to the fuel dispenser; temperature of the soil in which the pipeline is located; fuel temperature at the inlet to the pipeline and fuel parameters.

It should be noted that the stage at which the distribution of the temperature of the fuel in the gas station system is determined can be carried out not at each fuel dispensing, but after a certain period of time, for example, day, week, month, quarter, half year or other suitable period of time. In this case, one or more parameters used to determine the temperature distribution in the gas station system can be averaged over the corresponding time period. When determining the temperature distribution in a gas station system, statistical data can be used. The distribution of fuel temperature in a gas station system can be determined using data provided by regional hydrometeorology and environmental monitoring departments, or using statistical data obtained directly at gas stations. Also, the necessary data can be obtained from the appropriate sensors installed in the gas station system. The distribution of fuel temperature can be calculated in advance, as well as immediately before or during fuel dispensing.

According to another embodiment of the utility model, the correction unit may operate in either automatic or automated mode. In other words, the correction unit can automatically generate a control action on the fuel volume measuring unit in the fuel dispenser based on the calculated temperature distribution in the gas station system, or such correction can be performed by the correction unit with the participation of an authorized person.

Different brands of gasoline have different densities, different dependences of volume changes on temperature, different heat capacities, therefore gasolines of two different grades located in an underground tank, passing through the pipeline, ceteris paribus, will have different temperatures at the inlet to the fuel dispensers, which is taken into account in the proposed a way to sell fuel at a gas station.

In another embodiment of the method, when determining the distribution of the temperature of the fuel in the gas station system, at least one of: the temperature of the ambient air, the volume of fuel sold, the intensity of fuel sales, is additionally taken into account.

The temperature of the surrounding air may influence the accuracy of tempering of the sold fuel volume, since although it is very close to the temperature of the topsoil of the place where the gas station is located, it can be taken into account when determining the temperature distribution of the fuel of the gas station system, but in some cases the temperature ambient air temperature can significantly differ from the temperature of the topsoil (with a sharp change in weather, with strong heating by sunlight, etc.), and then to increase the accuracy of fuel dispensing, it must be taken into account to melt.

The volume of fuel sold and the intensity of fuel sales affect how much the temperature of the fuel at the outlet of the pipeline changes compared to the temperature of the fuel at its inlet, since, based on obvious considerations based on the laws of physics, it is clear that the larger the dose of fuel flows through to the pipeline, the smaller the influence of the pipeline on the temperature of the dose of fuel, and the more often and / or faster the fuel flows through the pipeline, the less the effect of the pipeline on the temperature of the fuel.

As noted above, to determine the distribution of fuel temperature in a gas station system, a predefined distribution of fuel temperature in a gas station system can be used, in particular, the average (average) distribution of fuel temperature in a gas station system can be used over a certain period of time. Moreover, as a time period for averaging, one of the day, week, month, quarter, half year or other suitable time period can be selected. In one embodiment of the method, an average seasonal distribution of fuel temperature in a gas station system can be used. That is, the year is divided into seasons, the temperature distribution in the gas station system is determined as the average for the season, based on it is found the average temperature for the season, the fuel is released taking into account the average temperature for the season. According to the selected time period, all parameters that are taken into account when determining the temperature distribution in the gas station system, which change during the averaging time, are also averaged.

The proposed method of selling fuel can be used in the existing methodology MI 2895-2004 “Fuel-dispensing columns. Verification Method ”, which applies to fuel dispensers (hereinafter referred to as columns) that meet the requirements of GOST 9018 and are configured to dispense doses at the average temperature of the fuel in the season and establishes the method for their periodic verification.

In the section “4. Verification conditions ”MI 2895-2004 describes the following:

4.1. As the working fluid, the dispensed fuel is used when checking the column.

4.2 The columns presented for verification are tuned for dispensing doses according to the average fuel temperature in a season, the volume of which corresponds to the nominal one at a fuel temperature of 20 ° C. As the average temperature of the fuel in the season, take the average air temperature for ground tanks and the average soil temperature for underground tanks at the depth of their occurrence.

4.3 Recommended seasons:

a) for underground tanks:

winter-spring (start: December 1-15, end: June 1-15);

summer-autumn (start: June 1-15, end: December 1-15);

b) for surface tanks:

fall-winter (beginning: November 1-15, ending: April 1-15);

spring-summer (beginning: April 1-15, ending: November 1-15).

4.4 The average temperature of fuel in a season is determined by the bodies of the State Metrological Service according to the statistics of regional centers for hydrometeorology and monitoring over the past two to three years, the weather station closest to the gas station.

If there is actual data on the temperature of the fuel in the tanks for the period under consideration, it is allowed to determine the temperature of the fuel from the statistics of the gas station.

4.5 The average fuel temperature determined in such a way in a season, as well as the division of the annual interval into seasons and their duration, are recorded in the protocol with the established dates for scheduled inspections at the beginning of each established season (the protocol forms are given in Appendix A and B).

The protocol approved by the head of the state metrological service (1 copy) is issued to the owner of the gas station.

4.6 Based on the protocol, the gas station staff on the day of the established seasonal calibration date, in the presence of a state inspector, adjusts the column to the average fuel temperature of the next season.

The setup date, total meter reading and average fuel temperature in the season are entered in the column form.

4.7 The fuel from the measuring devices, after setting up the columns, is poured into the tank and an act is made on the volume of the product returned to the tank.

The fuel volume is determined by the column counter.

Thus, in accordance with section 4.4 (If there is actual data on the temperature of the fuel in the tanks for the period under review, it is allowed to determine the temperature of the fuel from the statistics of the gas station), in the framework of MI 2895-2004, based on the proposed method, a technique can be developed that takes into account to a different degree, with some generalization or without it, such parameters of the gas station system as the temperature of the soil in which the underground tank is located, the parameters of the pipeline from the underground tank to the fuel dispenser, fuel parameters in the underground tank and according to this methodology determine the average temperature of the fuel per season. That is, based on the actual data on the temperature of the fuel in the tanks and taking into account the additional parameters described above, the temperature distribution in the gas station system is determined and the correction temperature is found, which is taken as the average fuel temperature for the season.

In the simplest version, such a technique can take into account, for example, only the temperature of the soil, the length of the pipeline, the temperature of the fuel at the entrance to the pipeline and the type of fuel dispensed, and this method averages the parameters for the season. The methodology may be called, for example, “Methodology for measuring average fuel temperature in a season in a gas station system based on statistical data on the average monthly temperature of fuel in gas station tanks.”

In another embodiment, such a technique can take into account, for example, only the temperature of the soil in which the underground tank is located, the length of the pipeline, the temperature of the fuel at the inlet to the pipeline and the brand of fuel dispensed, and this method averages the parameters for the season.

In one embodiment, based on the developed technique, in which the pipeline parameters are taken into account to one degree or another; soil temperature; the temperature of the fuel at the inlet to the pipeline and the fuel parameters, and as a result, the temperature distribution of the fuel in the gas station system is obtained with varying degrees of accuracy, the average fuel temperature is adjusted for the season, and this temperature is different for different types of gasoline. In this case, the correction temperature is the temperature of the fuel at the inlet to the fuel dispenser (this temperature is identical to the temperature of the fuel at the outlet of the pipeline connecting the underground tank and the fuel dispenser).

Thus, in a specific embodiment, using the developed methodology, the correcting temperature for the season is determined for each brand of gasoline.

In another embodiment, a utility model discloses a system for selling automotive fuel at a gas station corresponding to the method described above, comprising: a fuel dispenser (fuel dispenser) configured to measure and dispense the sold fuel volume; a data processing unit configured to determine a fuel temperature distribution in a gas station system and determine, based on said fuel temperature distribution in a gas station system, an inlet temperature of the fuel dispenser, which is adopted as a correction temperature; a correction unit connected to the fuel dispenser and to the data processing unit, configured to correct the actual fuel volume based on a certain correction temperature, the data processing unit determining the temperature distribution of the fuel in the gas station system based on at least the following predefined data: parameters a pipeline providing fuel to the fuel dispenser; temperature of the soil in which the pipeline is located; fuel temperature at the inlet to the pipeline and fuel parameters.

In figure 2, the fuel dispenser 1 contains a block 5 for measuring the sold volume of fuel and a block 2 for dispensing the adjusted volume of fuel, which can be structurally made as a single block.

The system operates as follows: the data processing unit 6 determines the temperature distribution of the fuel in the gas station system based on the model, algorithm or theoretical, empirical or semi-empirical analytical expression embedded in it and using predefined data. The methodology for determining the distribution of fuel temperature in the gas station system does not affect the essence of the utility model. The data processing unit 6 can only provide the value of the fuel temperature at the point at the inlet to the fuel dispenser 1, this temperature value is taken as the correction temperature, based on which the correction unit 7 corrects the fuel volume realized by the fuel dispenser 1. Further, through the block 2 dispensing the adjusted fuel volume, the fuel dispenser 1 releases the corrected amount of fuel.

It should be noted that the unit 6 for determining the distribution of the temperature of the fuel in the gas station system can be configured to determine not every time the fuel is dispensed, but after a certain period of time, for example, day, week, month, quarter, half year or other suitable period of time. The distribution of fuel temperature in a gas station system can be determined on the basis of data provided by regional hydrometeorology and environmental monitoring departments for several years of observation, or data from temperature sensors installed in a gas station system.

In this case, the correction unit 7 can operate either in an automatic or in an automated mode.

In this case, when determining the distribution of the temperature of the fuel in the gas station system, at least one of the type of fuel, type of fuel, or density of the fuel is used as fuel parameters.

In another embodiment of the system, the unit 6 for determining the temperature distribution of the fuel in the gas station system is configured to use at least one of the type of fuel, fuel grade, or fuel density when determining the temperature distribution of the fuel in the gas station system.

In another embodiment of the system, the unit 6 for determining the temperature distribution of the fuel in the gas station system is configured to additionally use at least one of: ambient temperature, sales volume, sales intensity.

In yet another embodiment, the unit 6 for determining the temperature distribution of the fuel in the gas station system is configured to determine the temperature distribution of the fuel in the gas station system based on analytically obtained dependencies, by modeling, or based on statistical or empirical data.

In yet another embodiment, the unit 6 for determining the temperature distribution of the fuel in the gas station system is configured to use, as the distribution of the temperature of the fuel in the gas station system, the distribution of the temperature of the fuel averaged over the time period in the gas station system. Moreover, as a time period for averaging, one of the following may be used: day, week, month, quarter, half year or other suitable time period. In an alternative embodiment, as a distribution of fuel temperature in a gas station system, an average seasonal distribution of fuel temperature in a gas station system can be used.

The methodology for determining the temperature distribution of fuel in a gas station system can be fully automated and implemented as a software product recorded on a computer-readable storage medium, or as a computing tool (device) executing commands for determining the distribution of fuel temperature in a gas station.

The application does not indicate specific software and hardware for the implementation of the relevant objects of the utility model formula, but one skilled in the art should understand that the essence of the utility model is not limited to a specific software or hardware implementation, and therefore any software and hardware known in the art. So the hardware can be implemented in one or more specialized integrated circuits, digital signal processors, digital signal processing devices, programmable logic devices, user programmable gate arrays, processors, controllers, microcontrollers, microprocessors, electronic devices, and other electronic modules configured to carry out the functions described in this document, a computer or a combination of the above.

Computer-readable media can be any known storage medium, examples of computer-readable storage media include read-only memory, random access memory, register, cache memory, semiconductor storage devices, magnetic media such as internal hard drives and removable drives, magneto-optical media and optical media, such as CD-ROMs and digital versatile disks (DVDs), as well as any other data carriers known in the art.

In the description of the utility model, the elements given in the singular should not be understood as being used only in a single copy, but should be understood as being used in the form of one or more elements, unless specifically indicated otherwise.

The described embodiments are not preferable and are not described in order to limit the scope of the utility model. Numerous other embodiments will be apparent to those skilled in the art within the scope of the utility model, which should also be considered as falling within the scope of the utility model.

Claims (10)

1. A system for selling automotive fuel at a gas station (gas station), comprising: fuel dispenser (TRK), made with the possibility of measuring and dispensing the realized volume of fuel; a data processing unit configured to determine a fuel temperature distribution in a gas station system and determine, based on said fuel temperature distribution in a gas station system, an inlet temperature of the fuel dispenser, which is adopted as a correction temperature; a correction unit connected to the fuel dispenser and to the data processing unit, configured to correct the actual fuel volume based on a certain correction temperature, moreover the data processing unit determines the temperature distribution of the fuel in the gas station system based on at least the following predefined data: parameters of the pipeline supplying fuel to the fuel dispenser; temperature of the soil in which the pipeline is located; fuel temperature at the inlet to the pipeline and fuel parameters. 2. The system according to claim 1, in which the correction unit is configured to operate either in an automatic or in an automated mode. 3. The system according to claim 1, in which the data processing unit is configured to use at least one of the type of fuel, type of fuel, or fuel density when determining the temperature distribution of the fuel in the gas station system. 4. The system according to claim 1, in which the data processing unit is configured to use at least one of: the temperature of the ambient air, the volume of sales, the intensity of sales, to determine the temperature distribution of the fuel in the gas station system. 5. The system according to any one of claims 1 to 4, in which the data processing unit is configured to determine the distribution of the temperature of the fuel in the gas station system analytically, by modeling, based on statistical data, empirical data, or using a combination of both. 6. The system according to claim 5, in which the statistics are at least one of the statistics of the temperature of the soil, statistics of the temperature of the fuel at the inlet of the fuel dispenser, the temperature of the fuel in the underground tank. 7. The system according to claim 1, in which the data processing unit is configured to determine the distribution of fuel temperature in the gas station system, the average over a period of time. 8. The system according to claim 1, in which the data processing unit is configured to determine the distribution of fuel temperature in the gas station system, the average for the season. 9. The system of claim 8, in which the data processing unit determines the distribution of fuel temperature in the gas station system, the average for the season for a particular brand of gasoline, and on its basis determines the correcting temperature of a particular brand of gasoline, average for the season. 10. The system according to claim 1, in which the data processing unit is configured to use at least one of: the length of the pipeline, the cross-sectional area of the pipeline, the thickness of the walls of the pipeline, the thermal conductivity of the walls of the pipeline, when determining the temperature distribution of the fuel in the gas station system, geometry of the pipeline.

Images