Fuel water content adjustment system and method

Abstract

The present disclosure discloses a fuel water content regulating system, comprising: a sampling and analysis module, used to sample fuel, perform water content analysis and obtain water content analysis results; a water content regulating module, further comprising: an oil-water separation module, used to filter out free water when the water content analysis result is greater than the required water content; a water adding module, used to add water when the water content analysis result is less than the required water content; and a self-circulating module, which keeps the oil-water mixture in self-circulation to ensure that the oil and water are fully mixed, wherein when the water content analysis result is equal to the required water content, the water content regulating module stops working. The fuel water content regulating system also includes a temperature control module, used to maintain the temperature of the oil-water mixture while performing water content regulation.

Description

Technical Field

[0001] The present application relates to ground laboratory testing of aircraft fuel systems, and more particularly to icing testing of fuel systems. Background Art

[0002] When the aircraft is flying at high altitude, the air temperature around the aircraft is very low, and the low temperature will affect the water dissolved or suspended in the fuel. If ice is produced in the fuel under such flight conditions, it is easy to block valves, fuel pumps, filters and other components on the pipeline, thus causing the fuel system to fail. Therefore, in the development of aircraft fuel systems, it is necessary to conduct fuel system icing tests under the conditions of quantitative water distribution and full mixing of fuel.

[0003] Generally, the fuel system icing test requires a fuel-water mixture with a specific temperature and a specific water concentration. The conventional method is usually to adjust the temperature first and then the water content, which lacks the accuracy of the water content adjustment. In addition, after configuring a fuel with a certain water content, it is usually directly transported to the test tank for testing. There is no circulation during the test, which may cause oil-water separation. The free water in the oil-water mixture is easy to deposit or aggregate, making it difficult to ensure that the fuel and the quantitative water are mixed evenly during the entire test process.

[0004] In view of this, there is a need in the art for a fuel water content regulating device that can fully mix fuel and a certain amount of water, thereby supporting the development of aircraft fuel systems. Summary of the invention

[0005] The fuel water content adjustment scheme disclosed in the present invention can configure a certain amount of water for the test fuel and make it fully mixed and evenly mixed, so as to be used for carrying out fuel system icing tests and supporting fuel system development, thereby avoiding the problem of fuel freezing when the aircraft is flying at high altitudes, and further ensuring the effectiveness of the fuel system.

[0006] In one embodiment of the present disclosure, a fuel water content regulating system is provided, comprising: a sampling and analysis module, used to sample fuel, perform water content analysis and obtain water content analysis results; a water content regulating module, further comprising: an oil-water separation module, used to filter out free water when the water content analysis result is greater than the required water content; a water adding module, used to add water when the water content analysis result is less than the required water content; and a self-circulating module, which keeps the oil-water mixture in self-circulation to ensure sufficient mixing of the oil and water, wherein when the water content analysis result is equal to the required water content, the water content regulating module stops working.

[0007] In another embodiment of the present disclosure, the fuel water content adjustment system further includes a temperature control module for maintaining the temperature of the fuel-water mixture while adjusting the water content.

[0008] In another embodiment of the present disclosure, the self-circulation module enables the oil-water mixture to maintain self-circulation to ensure sufficient mixing of the oil and water, including circulating the oil-water mixture between the test oil tank and the regulating oil tank during the test phase.

[0009] In another embodiment of the present disclosure, whether the water content analysis result is greater than, equal to, or less than the required water content is determined based on one or more consecutive samplings.

[0010] In yet another embodiment of the present disclosure, the determination of whether the water content analysis result is greater than, equal to, or less than a required water content is performed within a set range.

[0011] In yet another embodiment of the present disclosure, adding water when the water content analysis result is less than the required water content includes adding water at a desired rate.

[0012] In one embodiment of the present disclosure, a method for regulating the water content of fuel is provided, comprising: sampling the fuel, performing a water content analysis and obtaining a water content analysis result; filtering out free water when the water content analysis result is greater than a required water content; adding water when the water content analysis result is less than a required water content; maintaining the oil-water mixture in a self-circulating state to ensure that the oil and water are fully mixed; and stopping the addition or filtering of water when the water content analysis result is equal to the required water content.

[0013] In another embodiment of the present disclosure, the method for adjusting the water content in fuel further includes maintaining the temperature of the fuel-water mixture while adjusting the water content.

[0014] In yet another embodiment of the present disclosure, maintaining the oil-water mixture in self-circulation to ensure sufficient mixing of the oil and water includes circulating the oil-water mixture between a test oil tank and a regulating oil tank during the test development phase.

[0015] In another embodiment of the present disclosure, whether the water content analysis result is greater than, equal to, or less than the required water content is determined based on one or more consecutive samplings.

[0016] In yet another embodiment of the present disclosure, the number of consecutive samplings is presettable.

[0017] In another embodiment of the present disclosure, the determination of whether the water content analysis result is greater than, equal to, or less than the required water content is performed within a set range.

[0018] In yet another embodiment of the present disclosure, adding water when the water content analysis result is less than the required water content includes adding water at a desired rate.

[0019] This Summary is provided to introduce some concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above invention content and the following detailed description of the present disclosure will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the claimed invention. In the accompanying drawings, the same reference numerals represent the same or similar elements.

[0021] Figure 1 A block diagram of a fuel water content adjustment system according to an embodiment of the present disclosure is shown;

[0022] Figure 2 A schematic diagram showing an oil circuit implementation of a fuel water content regulating system according to an embodiment of the present disclosure is shown;

[0023] Figure 3 A flow chart showing a method for adjusting the water content of fuel according to an embodiment of the present disclosure is shown;

[0024] Figure 4 A flow chart showing a process of configuring water-saturated fuel using a fuel water content adjustment method according to an embodiment of the present disclosure;

[0025] Figure 5 A flow chart showing a process of configuring fuel with a water content required for a test using a fuel water content adjustment method according to another embodiment of the present disclosure;

[0026] Figure 6 A flow chart showing a process of using a fuel water content adjustment method during a test development phase according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure. However, the present disclosure may also be implemented in other ways different from those described herein. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.

[0029] The present disclosure will provide a fuel water content adjustment solution, which utilizes a self-circulation module, a water adding pump, a water content analyzer, an oil-water separator, a temperature control module and other equipment to achieve sufficient mixing of the fuel and a certain amount of water by self-circulating the oil-water mixture after quantitative water addition; and by circulating with a test tank, it is ensured that the fuel and water in the test tank are evenly mixed during the test to avoid the deposition of free water.

[0030] The fuel water content adjustment scheme disclosed in the present invention can configure a certain amount of water for the test fuel and make it fully mixed and uniform, so as to be used for carrying out fuel system icing tests and supporting fuel system development.

[0031] Figure 1 FIG. 1 is a block diagram of a fuel water content adjustment system 100 according to an embodiment of the present disclosure. Figure 2 The following is a schematic diagram of the oil circuit implementation of the fuel water content regulation system according to an embodiment of the present disclosure. Figure 1 and Figure 2 conduct.

[0032] The fuel water content regulating system 100 regulates the water content of the fuel in the regulating tank 102 during the fuel water content regulating stage, and ensures that the fuel and water in the test tank 112 are evenly mixed during the test stage.

[0033] The fuel water content regulating system 100 includes a water content regulating module 104 , a temperature control module 108 , a sampling and analysis module 114 , and a self-circulation module 116 . The water content regulating module 104 further includes an oil-water separation module 106 and a water adding module 110 .

[0034] During the fuel water content adjustment stage, the required fuel is added to the adjustment tank 102 through the oil depot and the refueling valve; the water added to the required fuel is added to the fuel from the self-circulation module 116 (for example, including the self-circulation pump (3-2)) through the water adding module 110 (for example, including the water tank (5-1), the micro water adding pump (5-2), and the water adding valve (5-3)); the self-circulation passage valve 1 (3-1), the self-circulation pump (3-2), the self-circulation passage valve 2 (3-3), the self-circulation passage valve 3 (3-4) and the pipeline included in the self-circulation module 116 form a basic oil-water mixture self-circulation passage, so that it is in circulation to avoid water deposition.

[0035] The temperature control module 108 composed of the temperature control passage valve 1 (6-1), the temperature control module (6-2) and the temperature control passage valve 2 (6-3) controls the temperature during the fuel water addition process while adjusting the water content, making the fuel water content configuration process more accurate.

[0036] The free water is filtered out and the water-saturated fuel is prepared by using the oil-water separation module 106 composed of, for example, the oil-water separation passage valve 1 (7-1), the oil-water separator (7-2), and the oil-water separation passage valve 2 (7-3).

[0037] The oil-water mixture in the process of adjusting the water content of the fuel is sampled by the sampling and analysis module 114 (for example, including the sampling valve (8-1) and the water content analyzer (8-2)), and the water content is monitored to see whether it meets the preset requirements for multiple times in a row. The multiple times can be preset, that is, how long and how many times in a row.

[0038] During the test phase, a circulation path is formed by the test oil tank circulation path valve 1 (4-1), the test oil tank refueling pump (4-2), the test oil tank refueling regulating valve (4-3), the test oil tank circulation path valve 2 (4-6), the test oil tank return pump (4-7) and the test oil tank (4-4) to ensure that the fuel and water in the test oil tank are evenly mixed during the test, and the oil level during the circulation process is not lower than the fuel level required by the test.

[0039] The fuel water content adjustment system disclosed in the present invention can achieve:

[0040] In the fuel water content adjustment stage, the fuel and water are fully mixed through the self-circulation module, and the water can be filtered out through the oil-water separation module when the water content is excessive, and the required distilled water can be added through the water adding module when the water content is insufficient;

[0041] During the test, the fuel containing free water is continuously circulated between the test tank and the regulating tank, thus avoiding the water deposition caused by the fuel standing still in the test tank.

[0042] In the above two stages, the oil-water separation module and the temperature control module are connected in series, and the fuel temperature is controlled while adding the required distilled water or filtering out the free water, thereby increasing the configuration accuracy of the water-saturated fuel.

[0043] Figure 3 A flow chart of a fuel water content adjustment method 300 according to an embodiment of the present disclosure is shown.

[0044] At 302 , fuel is sampled, analyzed for water content, and the water content analysis result is obtained.

[0045] In different embodiments of the present disclosure, the fuel may be fuel without water addition, fuel containing free water, fuel saturated with water, or fuel for testing. At different stages, fuel in different states (or with different water contents) may be sampled and analyzed. Figure 4-6 Describe in detail.

[0046] The water content analysis result is compared with the desired water content at 306. This comparison can be performed as desired.

[0047] When the water content analysis result at 306 is greater than the required water content, free water is filtered out at 308;

[0048] When the water content analysis result at 306 is less than the required water content, water is added at 310;

[0049] When the water content analysis result is equal to the required water content at 306, the addition or removal of water is stopped.

[0050] The above required water content may be within a certain range. For example, for water-saturated fuel, for example, at 29°C ± 3°C, the required water content of water-saturated fuel is generally between 90-130 ppm. Those skilled in the art will appreciate that the required water content of fuel may vary as required for different tests, which will not be elaborated here.

[0051] In the above steps, the oil-water mixture is kept in self-circulation to ensure that the oil and water are fully mixed.

[0052] At the same time, the entire process can maintain control over the temperature of the oil-water mixture (316) to achieve improved configuration accuracy of the water-saturated fuel.

[0053] The fuel water content adjustment method disclosed in the present invention can meet the requirement of quantitatively distributing water to the test fuel for the fuel system icing test, and configure the fuel oil liquid with the required water content before the test starts.

[0054] Figure 4 A flow chart of a process for configuring water-saturated fuel using a fuel water content adjustment method according to an embodiment of the present disclosure is shown. Figure 4 The process will be combined Figure 2 Describe in detail.

[0055] In one embodiment of the present disclosure, the process of configuring water-saturated fuel using the fuel water content adjustment method includes:

[0056] 402-Refueling: Open the refueling valve (1-2) and close the other valves, add the fuel required for the test from the oil depot (1-1) into the regulating oil tank (2), and close the refueling valve (1-2) after refueling is completed;

[0057] 406 – Self-circulation and temperature maintenance, add water.

[0058] Heating the fuel oil: start the self-circulation pump (3-2), the self-circulation passage valve 1 (3-1), the temperature control passage valve 1 (6-1), the temperature control module (6-2), the temperature control passage valve 2 (6-3), and the self-circulation passage valve 3 (3-4), heat the fuel oil to the required temperature for the test (for example, 29°C ± 3°C) through the temperature control module (6-2), and continue to maintain the temperature and the fuel oil self-circulation;

[0059] Adding water: The fuel is continuously temperature-controlled at the temperature required for the test and self-circulated. Add the distilled water required for the test to the water tank (5-1) (for example, the amount of water added is about 1 gallon of water for every 1,000 gallons of fuel, so that the fuel is supersaturated). Turn on the micro-water pump (5-2) and the water valve (5-3), and add water to the fuel at the water adding rate required for the test (for example, the water adding rate is about 55cc / min) until all the water is added to the self-circulating fuel. After the distilled water is added, turn off the micro-water pump (5-2) and the water valve (5-3) to stop adding water.

[0060] Continue to circulate: After all the water is added to the fuel, continue to circulate for a while (recommended for at least 30 minutes) to ensure that the oil and water are fully mixed;

[0061] 408- Filter out free water: Maintain the fuel temperature at the temperature required for the test, open the oil-water separation passage valve 1 (7-1), the oil-water separator (7-2), and the oil-water separation passage valve 2 (7-3), close the self-circulation passage valve 3 (3-4), and the fuel circulates through the oil-water separator (7-2) to filter out free water.

[0062] 410-The samples obtained by sampling multiple times (for example, 3 times) at different times (for example, at different time points within a time period) through the sampling valve (8-1) are analyzed in the water content analyzer (8-2) to determine the water content range of the water-saturated solution of the fuel at that temperature (for example, the water content of the water-saturated fuel is usually between 90-130ppm at 29°C±3°C).

[0063] When the fuel water content reaches saturation, continue to 412. Otherwise, return to 406 to continue.

[0064] 412 – Count of sampling analysis timings.

[0065] At this time, the fuel water content obtained from the sampling analysis is timed (ie, at different times) counted (ie, multiple times) and recorded.

[0066] When the timing value and the count value do not reach the specified value (416 or 418 is No), the process returns to 410 to continue sampling and analyzing.

[0067] When both the timing value and the counting value reach the specified value (416, 418 are yes), the process of configuring the water-saturated fuel ends.

[0068] Figure 5 A flow chart showing a process of configuring fuel with a required water content for a test using a fuel water content adjustment method according to another embodiment of the present disclosure. Figure 5 The process will be combined Figure 2 Describe in detail.

[0069] In one embodiment of the present disclosure, the process of configuring fuel with the required water content for the test using the fuel water content adjustment method includes:

[0070] At 502, refueling: open the refueling valve (1-2) and close the other valves, add the fuel required for the test from the oil reservoir (1-1) into the regulating oil tank (2), and close the refueling valve (1-2) after refueling is completed;

[0071] At 504, water is added while the temperature is maintained by self-circulation.

[0072] Heating the fuel oil: start the self-circulation pump (3-2), the self-circulation passage valve 1 (3-1), the temperature control passage valve 1 (6-1), the temperature control module (6-2), the temperature control passage valve 2 (6-3), and the self-circulation passage valve 3 (3-4), heat the fuel oil to the required temperature for the test (for example, 29°C ± 3°C) through the temperature control module (6-2), and continue to maintain the temperature and the fuel oil self-circulation;

[0073] Adding water: Maintain the fuel temperature at the required temperature for the test, and calculate the amount of distilled water that needs to be added based on the water content required by the test and the water content in the fuel measured in the previous step (for example, when the water content of the water-saturated fuel is 90ppm, add 0.75cc of water to every gallon of fuel to reach the critical water content of 288ppm required by the typical icing test conditions). Add the required distilled water to the water tank (5-1), turn on the micro-water adding pump (5-2) and the water adding valve (5-3), and add water to the fuel at the water adding rate required by the test (the water adding rate is about 55cc / min). Keep the fuel self-circulating until the distilled water is added. Then, turn off the micro-water adding pump (5-2) and the water adding valve (5-3) to stop adding water.

[0074] Circulation: After all the water is added to the fuel, continue to circulate for a while (recommended for at least 60 minutes) to ensure that the oil and water are fully mixed;

[0075] At 506, a water content analysis is performed and a water content analysis result is obtained.

[0076] Water content analysis: Sampling is performed multiple times (usually 3 times) at different times through a sampling valve (8-1), and the obtained samples are analyzed in a water content analyzer (8-2);

[0077] At 508 , the water content analysis results are compared to the desired water content.

[0078] When the water content analysis result at 508 is greater than the required water content, free water is filtered out at 510;

[0079] If the water content in the fuel is measured multiple times over a long period of time and is much greater than the water content required for the test, the process returns to 506 after filtering out the water.

[0080] When the water content analysis result at 508 is less than the required water content, water is added at 512;

[0081] If the water content in the fuel measured multiple times over a long period of time is less than the water content required for the test, the amount of distilled water to be added is calculated and the process returns to 506;

[0082] When the water content analysis result is equal to the required water content at 508 , a timer count is performed at 514 .

[0083] The water content analysis result at 508 is equal to the required water content, which can be the average value of multiple measurements of the fuel water content to reach the minimum water content required by the test (for example, 288 ppm).

[0084] At 514 , the fuel water content obtained by the sampling analysis is recorded by timing (ie, different times) counting (ie, multiple times).

[0085] When the timing value and the count value do not reach the specified value (516 or 518 is No), the process returns to 506 to continue sampling and analyzing.

[0086] When both the timing value and the counting value reach the specified value (516, 518 are yes), the process of configuring the fuel with the required water content for the test is ended.

[0087] When the water content regulating device has adjusted the water content of the fuel, it is usually necessary to adjust other preparatory conditions required by the test according to the requirements of the fuel system icing test. When the fuel water content, temperature and other preparatory conditions required by the test are met, the test will begin.

[0088] Figure 6 A flow chart showing a process of using a fuel water content adjustment method during a test development phase according to an embodiment of the present disclosure. Figure 6 The process will be combined Figure 2 Describe in detail.

[0089] During the test, a circulation can continue to be formed between the regulating tank and the open test tank, and the fuel level in the test tank can be maintained at the oil level required by the test, so that the fuel in the test tank is always in circulation, avoiding the phenomenon of uneven water content in the fuel due to moisture deposition during the test when it is stationary.

[0090] In one embodiment of the present disclosure, the process of using the fuel water content adjustment method during the test development phase includes:

[0091] At 602 , fuel with adjusted water content is added to a test fuel tank via a conditioning tank.

[0092] Open the test fuel tank circulation passage valve 1 (4-1), the test fuel tank refueling pump (4-2), and the test fuel tank refueling regulating valve (4-3), and close the remaining valves, and add fuel with water content and temperature that meet the requirements from the regulating tank (2) into the test fuel tank (4-4);

[0093] At 604, the test tank and the regulating tank circulate: when the fuel level in the test tank (4-4) reaches the required level of the test tank (e.g., two-thirds of the tank height), the test tank circulation passage valve 2 (4-6) and the test tank return pump (4-7) are opened, so that the fuel circulates between the test tank (4-4) and the regulating tank (2), and at the same time, the test tank refueling regulating valve (4-3) automatically adjusts the opening according to the liquid level in the test tank, so that the fuel in the test tank (4-4) is maintained at the required level (e.g., more than two-thirds of the tank height);

[0094] At 606, the simulated engine fuel consumption path is opened: the fuel is kept circulating between the test fuel tank (4-4) and the regulating fuel tank (2), and the simulated engine fuel consumption path (4-5) is opened to simulate the engine fuel consumption flow.

[0095] At 608, the test tank refueling regulating valve (4-3) automatically adjusts its opening according to the liquid level in the test tank (4-4), so that the fuel in the test tank (4-4) is maintained at the required oil level (for example, more than two-thirds of the tank height) until the test is completed (610).

[0096] The fuel water content adjustment scheme disclosed in the present invention can achieve:

[0097] In the fuel water content adjustment stage, the fuel and water are fully mixed through the self-circulation module, and the water can be filtered out through the oil-water separation module when the water content is excessive, and the required distilled water can be added through the water adding module when the water content is insufficient;

[0098] During the test, the fuel containing free water is continuously circulated between the test tank and the regulating tank, thus avoiding the water deposition caused by the fuel standing still in the test tank.

[0099] In the above two stages, the oil-water separation module and the temperature control module are connected in series, and the fuel temperature is controlled while adding the required distilled water or filtering out the free water, thereby increasing the configuration accuracy of the water-saturated fuel.

[0100] Therefore, the fuel water content adjustment scheme disclosed in the present invention achieves full mixing of the fuel and the quantitative water by self-circulating the oil-water mixture after quantitative water addition; and by circulating with the test tank, it is ensured that the fuel and water in the test tank are evenly mixed during the test process to avoid the deposition of free water. This avoids the problem of fuel freezing when the aircraft is flying at high altitude, thereby ensuring the effectiveness of the fuel system.

[0101] The various steps and modules of the fuel water content adjustment system and method described above can be implemented in hardware, software, or a combination thereof. If implemented in hardware, the various illustrative steps, modules, and circuits described in conjunction with the present invention can be implemented or executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic components, hardware components, or any combination thereof. The general-purpose processor can be a processor, a microprocessor, a controller, a microcontroller, or a state machine, etc. If implemented in software, the various illustrative steps and modules described in conjunction with the present invention can be stored or transmitted as one or more instructions or codes on a computer-readable medium. The software modules that implement the various operations of the present invention can reside in a storage medium, such as RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, removable disk, CD-ROM, cloud storage, etc. The storage medium can be coupled to the processor so that the processor can read and write information from / to the storage medium and execute the corresponding program modules to implement the various steps of the present invention. Moreover, the software-based embodiment can be uploaded, downloaded, or remotely accessed through appropriate communication means. Such appropriate communications means include, for example, the Internet, the World Wide Web, an intranet, software applications, cable (including fiber optic cables), magnetic communications, electromagnetic communications (including RF, microwave and infrared communications), electronic communications or other such communications means.

[0102] It should also be noted that these embodiments may be described as a process depicted as a flow chart, flow diagram, structure diagram, or block diagram. Although the flow chart may describe the operations as sequential processes, many of these operations can be performed in parallel or concurrently. In addition, the order of these operations can be rearranged.

[0103] The disclosed methods, devices, and systems should not be limited in any way. On the contrary, the present invention covers all novel and non-obvious features and aspects of the various disclosed embodiments (alone and in various combinations and sub-combinations with each other). The disclosed methods, devices, and systems are not limited to any specific aspects or features or combinations thereof, nor do any disclosed embodiments require the existence of any one or more specific advantages or the resolution of specific or all technical problems.

[0104] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many changes without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A fuel water content adjustment system, comprising: Sampling and analysis module, used to sample fuel, perform water content analysis and obtain water content analysis results; The water content adjustment module further comprises: An oil-water separation module, used for filtering out free water when the water content analysis result is greater than the required water content; a water adding module, used for adding water when the water content analysis result is less than the required water content; and The self-circulating module keeps the oil-water mixture in self-circulation to ensure that the oil and water are fully mixed. When the water content analysis result is equal to the required water content, the water content adjustment module stops working. The system further comprises a temperature control module for maintaining the temperature of the oil-water mixture while adjusting the water content. During the test phase, the oil-water mixture is circulated between the regulating oil tank and the test oil tank.

2. The fuel water content adjustment system according to claim 1, wherein whether the water content analysis result is greater than, equal to or less than the required water content is determined based on one or more consecutive samplings.

3. The fuel water content regulating system according to claim 1, wherein the determination of whether the water content analysis result is greater than, equal to or less than the required water content is performed within a set range.

4. The fuel water content adjustment system of claim 1, wherein adding water when the water content analysis result is less than the required water content comprises adding water at a desired rate.

5. A method for adjusting the water content of fuel, comprising: Sampling fuel oil, analyzing it for water content and obtaining the water content analysis results; When the water content analysis result is greater than the required water content, filtering out free water; Adding water when the water content analysis result is less than the required water content; Keep the oil-water mixture in self-circulation to ensure that the oil and water are fully mixed; as well as When the water content analysis result is equal to the required water content, stop adding or filtering water. The method further comprises maintaining the temperature of the oil-water mixture while adjusting the water content, And during the test implementation stage, the oil-water mixture is circulated between the regulating oil tank and the test oil tank.

6. The method for adjusting the water content of fuel as claimed in claim 5, wherein whether the water content analysis result is greater than, equal to or less than the required water content is determined based on one or more consecutive samplings.

7. The fuel water content adjustment method according to claim 6, wherein the number of consecutive samplings is presettable.

8. The method for adjusting the water content of fuel as claimed in claim 5, wherein the determination of whether the water content analysis result is greater than, equal to or less than the required water content is performed within a set range.

9. The method for adjusting the water content of fuel as claimed in claim 5, wherein adding water when the water content analysis result is less than the required water content comprises adding water at a desired rate.

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