JP2015160868A - Carbon dioxide dissolved liquid fuel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carbon dioxide dissolved liquid fuel whose fuel economy is further improved than a conventional fine fluid mixed liquid fuel.SOLUTION: From the fact that a carbon dioxide concentration in atmosphere is extremely low, namely 0.04%, a carbon dioxide dissolved liquid fuel is obtained by loading and dissolving pure carbon dioxide into a liquid fuel. The pure carbon dioxide is loaded and dissolved in the liquid fuel by an ejector type fine fluid generator 6. The carbon dioxide dissolved liquid fuel is obtained in a carbon dioxide liquid fuel storage tank 3 that stores the carbon dioxide dissolved liquid fuel and that feeds the liquid fuel to the ejector type fine fluid generator 6 and circulates the liquid fuel.

Description

  The present invention relates to a carbon dioxide-dissolved liquid fuel that has been modified to improve fuel efficiency by introducing and dissolving carbon dioxide gas into the liquid fuel.

  The Applicant has developed an ejector-type system to increase engine output, reduce fuel consumption, and reduce harmful pollutants emitted from the engine at the same time by promoting engine combustion. An apparatus for producing a microfluidic mixed liquid fuel has been proposed (see Patent Document 1) in which a gas and / or liquid fluid can be refined by a microfluidic generator and mixed into the liquid fuel.

  The manufacturing apparatus described in Patent Document 1 is an ejector-type micro-fluid in which micro-fluid microbubbles are mixed and dispersed in liquid fuel in a micro-fluid-mixed liquid fuel manufacturing apparatus in which micro-fluid is mixed and dispersed in liquid fuel. A fluid generator and a pump that pressurizes liquid fuel and feeds the liquid fuel to the ejector-type microfluidic generator, and the ejector-type microfluidic generator introduces a plurality of liquid fuels pressurized by the pump. A mixed fluid introduction flow channel for introducing mixed fluid mixed into the liquid fuel together with the liquid fuel flow channel, and a mixed fluid discharged from the mixed fluid introduction flow channel into the liquid fuel discharged from the liquid fuel flow channel into fine bubbles and dispersed. Manufacturing apparatus having a microfluidic generating space having a liquid fuel guide groove and a microfluidic mixing chamber for mixing microfluids generated in the microfluidic generating space A.

  Liquid fuels applicable to the production apparatus include diesel oil for diesel engines such as automobiles, ships, power machines, and generators, biodiesel oil (BDF), gasoline for gasoline engines such as automobiles, small ships, and power generation, and Heavy oil for heating, large ships, power generation boilers, automobiles, ethanol for power generation ethanol engines, and kerosene for aircraft.

  Examples of mixed fluids to be finely mixed with liquid fuel include air, oxygen, ozone or hydrogen, water as water, and fuel oil other than liquid fuel. Also, liquid fuel is mixed with gas and liquid. You can also

JP 2008-169250 A

  However, as the fuel efficiency of the engine is improved, the conventional microfluid-mixed liquid fuel described in Patent Document 1 cannot provide a significant improvement in fuel efficiency.

  SUMMARY OF THE INVENTION Accordingly, the present invention is to provide a carbon dioxide-dissolved liquid fuel that has further improved fuel efficiency compared to the conventional microfluid-mixed liquid fuel.

  The invention of claim 1 of the present application is a carbon dioxide-dissolved liquid fuel in which pure carbon dioxide gas is introduced and dissolved in the liquid fuel because the carbon dioxide concentration in the atmosphere is as extremely low as 0.04%. In the present invention, pure carbon dioxide gas is carbon dioxide gas having a purity of 99.5% or more, which is filled in a carbon dioxide gas cylinder.

  The invention of claim 2 of the present invention is an ejector-type microfluidic generator that stores a carbon dioxide-dissolved liquid fuel in which pure carbon dioxide gas is introduced and dissolved in the liquid fuel, and is sent to the ejector-type microfluidic generator. This is a carbon dioxide-dissolved liquid fuel obtained in a carbon dioxide liquid fuel storage tank that is liquefied and circulated.

  The carbon dioxide-dissolved liquid fuel of the present invention can be used for various engines, such as light oil for diesel engines such as automobiles, ships, power machines, and generators, biodiesel oil (BDF), automobiles, small ships, Improve fuel economy by dissolving pure carbon dioxide in gasoline for power generation and other gasoline engines, fuel oil for heating, large ships, power generation boilers, automobiles, ethanol for power generation ethanol engines, and kerosene for aircraft. It becomes possible.

  Although the air contains 0.04% carbon dioxide, even if air is mixed into the liquid fuel, improvement in fuel efficiency cannot be expected so much, and the present invention is effective when carbon dioxide in the air is dissolved. It is necessary to dissolve a larger amount of carbon dioxide gas.

  In the present invention, pure carbon dioxide gas is mixed into a liquid fuel and dissolved using a cylinder to promote engine combustion, thereby improving fuel efficiency.

It is the schematic of the manufacturing apparatus of the carbon dioxide dissolved liquid fuel of this invention. 1 shows the structure of an ejector-type microfluidic generator used in the production of a carbon dioxide-dissolved liquid fuel according to the present invention, wherein (a) is a longitudinal sectional view, and (b) shows the configuration of an introduction portion viewed from the liquid fuel introduction side. (C) is a bottom view seen from the fine fluid mixed liquid fuel discharge port side, and (d) is an enlarged bottom view seen from the fine fluid mixed liquid fuel discharge port side. It is the schematic of the carbon dioxide dissolved liquid fuel manufacturing apparatus used in the Example of this invention. It is a graph which shows the influence which carbon dioxide melt | dissolution liquid fuel has on engine performance.

  In FIG. 1, the liquid fuel sent from the fuel tank is sent directly to the fuel pump 11 through the fuel introduction pipe 1. When the fuel pump 11 starts liquid feeding and the engine starts, the fuel is sent to the ejector-type microfluidic generator 6 where carbon dioxide gas is introduced from the carbon dioxide cylinder and the carbon dioxide gas dissolves in the fuel. The carbon dioxide-dissolved liquid fuel is supplied to the engine through the liquid supply pipe 10.

  In FIG. 2, the microfluidic generator 6 includes a carbon dioxide gas introduction passage 23 having a carbon dioxide introduction hole 23 a for introducing carbon dioxide together with a liquid fuel passage 21 for introducing liquid fuel pressurized by the fuel pump 11. And a fine fluid generation space 22a for finely dissolving carbon dioxide gas in the liquid fuel and a fine fluid mixing chamber 22. In addition, 5 is piping.

  The liquid fuel inflow hole 21 a and the fine fluid generation space 22 a communicate with each other by a plurality of (in this case, three) liquid fuel flow paths 21, and the fine fluid generation space 22 a intersects the liquid fuel flow path 21. The liquid fuel guide groove 21c is provided. By providing the liquid fuel guide groove 21c, the liquid discharged from the liquid fuel outflow hole 21b to the fine fluid generation space 22a is introduced by generating a separation region accompanied by cavitation on the discharge surface having the carbon dioxide gas introduction hole 23a. The dissolved carbon dioxide gas can be dissolved efficiently.

  The carbon dioxide introduction hole 23a and the carbon dioxide introduction pipe 9 connected to the side surface of the microfluidic generator 6 are communicated by a carbon dioxide introduction passage 23 provided in the microfluidic generator 6, and the amount of carbon dioxide introduced is The carbon dioxide gas introduction pipe 9 can be freely adjusted by a carbon dioxide gas introduction amount adjusting valve 8. In addition, 7 is a check valve.

<Example>
In FIG. 3, the carbon dioxide-dissolved liquid fuel 3 a can be generated while circulating the fuel guided from the fuel tank to the carbon dioxide-dissolved liquid fuel storage tank 3.

  The fuel sent from the fuel tank is sent from the fuel introduction pipe 1 to the carbon dioxide-dissolved liquid fuel storage tank 3. At this time, the liquid level of the carbon dioxide-dissolved liquid fuel storage tank 3 is kept constant by the constant water level valve 2. When the fuel pump 11 starts feeding and the engine starts, the fuel in the carbon dioxide dissolved liquid fuel storage tank 3 is sent to the ejector-type microfluidic generator 6 by the circulation pump 4, and the microfluidic generator 6 produces carbon dioxide. Is generated, and carbon dioxide-dissolved liquid fuel 3a in which carbon dioxide is dissolved in the fuel is generated and discharged to the carbon dioxide-dissolved liquid fuel storage tank 3.

  Since the carbon dioxide-dissolved liquid fuel 3a in the carbon dioxide-dissolved liquid fuel storage tank 3 is circulated by the circulation pump 4 and the fine fluid generator 6, the amount of carbon dioxide mixed in can be easily increased and generated. The carbon dioxide liquid fuel 3 a is sent to the engine by the fuel pump 11. A carbon dioxide gas introduction pipe 9 is connected to the microfluidic generator 6 and a check valve 7 and a mixed fluid introduction amount adjustment valve 8 are provided.

<Experimental equipment>
Table 1 shows the specifications of the test organization.

<Experimental conditions>
The experimental conditions are as follows.
Fuel: JIS No. 2 diesel oil Fuel circulation pump pressure: 0.31 MPa
Fuel circulation pump supply: 0.7 L / min
Carbon dioxide supply rate: 17 cm ³ / min
Engine speed 1800rpm
Carbon dioxide dissolved liquid fuel storage tank capacity 48mm long x 118mm wide x 112mm deep capacity 0.68L
Carbon dioxide purity: Carbon dioxide cylinder (purity 99.5%)
Measure load up to 500 kPa every 100 kPa

<Experimental result>
The experimental results are as shown in FIG.

  From Tables 1 and 2, fuel consumption is improved with a carbon dioxide-dissolved liquid fuel that uses a fuel circulation pump that is more than seven times the maximum fuel consumption and supplies approximately 2.4% pure carbon dioxide to the fuel circulation. It was confirmed. The concentration of carbon dioxide in the air is 0.04%, but in this test, improvement in fuel efficiency cannot be expected even if air is mixed in. Therefore, the carbon dioxide concentration used is the concentration of carbon dioxide contained in the air. It was possible to confirm that an amount in excess of was required.

  In the present invention, the fuel efficiency is improved by dissolving carbon dioxide gas in the liquid fuel. However, although the mechanism is unknown, the following is inferred. That is, when liquid fuel in which carbon dioxide gas is dissolved is injected into the combustion chamber, atomization of the injected fuel is facilitated because the dissolved carbon dioxide is instantly deposited. As a result, the specific surface area per unit volume where the fuel and air are in contact with each other increases, so that the combustion time is shortened and the fuel efficiency is improved.

  Therefore, it is not always necessary to use pure carbon dioxide as the carbon dioxide to be dissolved, and it is also possible to use gas having a higher carbon dioxide concentration than air, for example, EGR (exhaust gas recirculation) gas used in internal combustion engines. It is. In addition to carbon dioxide gas, any gas that has high solubility in liquid fuel can be used as long as it does not cause problems such as corrosion in the internal combustion engine regardless of flammability or nonflammability.

1: Fuel introduction pipe 2: Constant water level valve 3: Carbon dioxide dissolved liquid fuel storage tank 3a: Carbon dioxide dissolved liquid fuel tank 4: Circulation pump 5: Piping 6: Fine fluid generator 7: Check valve 8: Carbon dioxide introduction amount Adjustment valve 9: Carbon dioxide introduction pipe 10: Liquid supply pipe 11: Fuel pump 21: Liquid fuel flow path 21a: Liquid fuel inflow hole 21b: Liquid fuel outflow hole 21c: Liquid fuel guide groove 22: Fine fluid mixing chamber 22a: Fine Fluid generation space 23: Carbon dioxide introduction channel 23a: Carbon dioxide introduction hole

Claims (2)

  Carbon dioxide-dissolved liquid fuel in which pure carbon dioxide is dissolved in liquid fuel.   Carbon dioxide liquid fuel in which pure carbon dioxide gas is introduced and dissolved in liquid fuel in the ejector type microfluidic generator, and the carbon dioxide dissolved liquid fuel is stored and sent to the ejector type microfluidic generator for circulation. Carbon dioxide-dissolved liquid fuel obtained from a storage tank.

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