KR101712904B1 - Tri-generation system using engine to selectively use liquefied petroleum gas and natural gas, and control method thereof - Google Patents

Abstract

The present invention relates to a traizen system using a liquefied petroleum gas and a natural gas common engine and a control method thereof, and more particularly, to a traizen system and a control method thereof using a gas engine for use in cooling, heating and carbon dioxide fertilization or using gas engines for electricity, heating and carbon dioxide In the TRIZEN system, the liquefied petroleum gas and the natural gas can be commonly used in the gas engine of the TRIZEN system, so that if one fuel supply is cut off or is not smoothly supplied, The present invention relates to a traizen system using a liquefied petroleum gas and a natural gas common engine and a control method thereof so that continuous operation of the traizen system can be performed without stopping the gas engine.

Description

Technical Field [0001] The present invention relates to a system and a control method for a liquefied petroleum gas and a natural gas common engine,

The present invention relates to a traizen system using a liquefied petroleum gas and a natural gas common engine and a control method thereof, and more particularly, to a traizen system and a control method thereof using a gas engine for use in cooling, heating and carbon dioxide fertilization or using gas engines for electricity, heating and carbon dioxide It is possible to use liquefied petroleum gas and natural gas in common with the gas engine of the TRIZEN system, so that when one fuel supply is cut off or is not smoothly supplied, it is automatically switched to another fuel, The present invention relates to a tragene system using a liquefied petroleum gas and a natural gas common engine, and a control method thereof, which enable the efficiency of the gas engine to be maximized with respect to the fuel, respectively.

Generally, a gas engine or a gas engine heat pump (GHP) system uses electricity generated from low-cost gaseous fuels (natural gas, city gas, etc.) to supply electricity, supply hot water .

In this case, as shown in FIG. 1, the conventional generator or the geotechnical system includes an electric supply means for generating electric power by driving the gas engine 101 and supplying electric power to electric devices such as home electric appliances and lighting devices in the home A heating supply means for supplying heating and hot water in the house using the exhaust heat generated by the operation of the gas engine 101 and the cooling water heated after cooling the gas engine and an electric power generated by the operation of the gas engine 101 And a cooling supply means for supplying cooling in the home by using the cooling means.

However, because it is this generator or whether Chippewa systems such is the like of hydrocarbon (HC), carbon monoxide (CO) and nitrogen oxides (NO _X) noxious exhaust gases in the exhaust gas discharged after combustion from the gas engine 101 is a large amount, gas The exhaust gas discharged through the exhaust pipe of the engine could not be utilized for carbon dioxide fertilization required for cultivation of crops such as a greenhouse or a large-scale facility horticultural complex.

In addition, according to the conventional gas generators and the gas engines of the Jiechi system, natural gas engines and liquefied petroleum gas (LPG) propane engines are separately manufactured and used depending on the types of gas fuel supplied. Natural gas and LPG propane gas For common use, the engine for LPG propane may be connected to natural gas and used to reduce the output. On the contrary, when the LPG propane is connected to the natural gas generator, the compression ratio of the natural gas engine is higher than that of the LPG propane engine, so that the engine may be damaged due to knocking or the like when LPG propane is used.

When natural gas is supplied to the engine for the LPG propane, the ignition timing of the engine control unit (ECU) should be spark advance rather than the LPG propane in order to improve the output and efficiency. However, , Which resulted in an output reduction of 30 ~ 40% more than that of LPG propane.

Accordingly, by using liquefied petroleum gas and natural gas in common for the gas engine of the Traizen system which is used for cooling, heating and carbon dioxide fertilization by using a gas engine or for electricity, cooling and carbon dioxide fertilization, It is necessary to automatically switch to the other fuel when shut off or not smoothly supplied so that the continuous operation of the tragene system can be performed without stopping the gas engine.

Further, even when the type of fuel supplied to the gas engine is changed, the output and efficiency of the gas engine are not lowered and the noxious gas in the exhaust gas is prevented from increasing, and the exhaust gas discharged through the exhaust pipe of the gas engine It is necessary to have a traizen system and its control method which can stably and easily utilize the gas for carbon dioxide fertilization required for cultivation of crops such as a greenhouse or a large-scale facility gardening complex.

KR 10-2004-0085540 (October 10, 2004)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a trailer system which utilizes a gas engine for cooling, heating and carbon dioxide fertilization or utilizes a gas engine for electricity, heating and carbon dioxide It is possible to use liquefied petroleum gas and natural gas in common for the gas engine of the present invention so that when one fuel supply is interrupted or not supplied smoothly, The system can be operated and even if the type of fuel supplied to the gas engine is changed, the output and efficiency of the gas engine are not lowered and the noxious gas in the exhaust gas is not increased, The exhaust gas discharged through the exhaust pipe is introduced into the plastic housing Mo horticulture is also necessary for the stability of carbon dioxide fertilization of crops such as Triton just using liquefied petroleum gas and natural gas engines that can be shared easily take advantage of now to provide a system and a control method.

In order to accomplish the above object, the present invention provides a traizen system using a liquefied petroleum gas and a natural gas common engine. The traizen system is used for cooling, heating, and carbon dioxide application using a gas engine, A liquefied petroleum gas supply unit connected to the gas engine and capable of supplying liquefied petroleum gas to the gas engine; A natural gas supply unit connected to the gas engine and capable of supplying natural gas to the gas engine; A mixer that receives fuel from the liquefied petroleum gas supply unit or the natural gas supply unit and injects fuel into the gas engine; And a controller for selecting any fuel according to the amount of fuel in the liquefied petroleum gas supply unit and the amount of fuel in the natural gas supply unit and supplying the selected fuel to the mixer. And a control unit.

Further, the present invention utilizes the cooling water of the radiator for cooling the gas engine and the exhaust heat of the exhaust pipe for heating, utilizes the refrigerant compressed by the compressor driven by the gas engine to cool the exhaust gas, And is utilized for fertilizing carbon dioxide using exhaust gas from which noxious gases have been removed through a three-way catalyst.

Further, the present invention utilizes electricity generated by a generator connected to the gas engine, utilizes the cooling water of the radiator for cooling the gas engine and the exhaust heat of the exhaust pipe to heat the three-way catalyst installed in the exhaust pipe of the gas engine, And is used for fertilizing carbon dioxide using exhaust gas from which harmful gases have been removed.

The liquefied petroleum gas supply unit may include a liquefied petroleum gas supply line connected to a liquefied petroleum gas supply source, a liquefied petroleum gas supply control valve installed in the liquefied petroleum gas supply line, A natural gas supply line is connected to a natural gas supply line, a natural gas supply control valve is installed in the natural gas supply line, and a natural gas supply control valve is provided in front of the natural gas supply control valve. A second pressure and temperature sensor is installed and the control unit is connected to the mixer, the gas engine, the liquefied petroleum gas supply control valve, the first pressure and temperature sensor, the natural gas supply control valve and the second pressure and temperature sensor, The liquefied petroleum gas supply regulating valve and the liquefied petroleum gas supply regulating valve according to the pressure and temperature of the liquefied petroleum gas supply line and the pressure and temperature of the natural gas supply line, Natural gas is characterized in that to selectively open any one of the supply control valve.

Also, the liquefied petroleum gas supply unit and the natural gas supply unit are connected in parallel, and one fuel selected automatically from the two fuels is supplied to the mixer through a common pressure regulator.

The fuel supply line to which the fuel is supplied to the mixer is provided with a supply fuel pressure sensor, and the supply fuel pressure sensor is connected to the control unit.

The mixer mixes the fuel supplied through the fuel supply line with the outside air and supplies the mixed gas to the gas engine. The mixer is provided with a main control valve connected to the fuel supply line to regulate the fuel inflow amount into the mixer, And a solenoid valve connected to the supply line for additionally controlling the amount of fuel flowing into the mixer is installed in parallel.

The control method of the tragene system using the liquefied petroleum gas and the natural gas common engine of the present invention is a method of controlling the tragene system using the gas engine for cooling, heating and carbon dioxide application, or using the gas engine for electricity, heating, A liquefied petroleum gas and a natural gas common engine for supplying a mixer in which a fuel and an air are mixed using a mixer as a gas engine of a system to be supplied to a mixer by selecting any one of liquefied petroleum gas and natural gas, The control of the gas engine using one or more of the control of the ignition timing according to the selected fuel, the application of the common compression ratio, and the control of the air-fuel ratio according to the pressure fluctuation of the fuel supplied to the mixer .

Further, the ignition timing control method is characterized in that, for each of the liquefied petroleum gas and the natural gas fuel, the degree of advancement of the ignition timing is adjusted in accordance with the variation of the load acting on the gas engine.

Further, the common compression ratio applying method is characterized by using a gas engine having a common compression ratio in which knocking does not occur with respect to the liquefied petroleum gas and the natural gas fuel.

Also, the air-fuel ratio control method may include: measuring a pressure of fuel supplied to the mixer (SA10); (SA20) of the fuel injection quantity data corresponding to the pressure of the fuel supplied to the mixer in a fuel injection quantity map previously set for pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer; (SA30) correcting the searched fuel injection quantity data according to the temperature of the fuel supplied to the mixer and the oxygen concentration of the air; And controlling the mixer using the corrected fuel injection amount data (SA40); And a control unit.

The ignition timing control and the air-fuel ratio control method may further include: measuring a pressure of fuel supplied to the mixer (SB10); The ignition timing data and the fuel injection amount data corresponding to the pressure of the fuel supplied to the mixer are inquired in the ignition timing map and the fuel injection amount map previously set for the pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer (Step SB20); (SB30) correcting the searched ignition timing data and the fuel injection amount data according to the temperature of the fuel supplied to the mixer and the oxygen concentration of the air; And controlling the gas engine and the mixer using the corrected ignition timing data and the fuel injection amount data (SB40); And a control unit.

Further, the present invention utilizes the cooling water of the radiator for cooling the gas engine and the exhaust heat of the exhaust pipe for heating, utilizes the refrigerant compressed by the compressor driven by the gas engine to cool the exhaust gas, In the traizen system utilizing the exhaust gas from which harmful gases have been removed through the three-way catalyst, the ignition timing map and the fuel injection amount map for the rpm variation or the load variation of the gas engine are further used to ignite And the air-fuel ratio is controlled.

Further, the present invention utilizes electricity generated by a generator connected to the gas engine, utilizes the cooling water of the radiator for cooling the gas engine and the exhaust heat of the exhaust pipe to heat the three-way catalyst installed in the exhaust pipe of the gas engine, Fuel ratio is controlled by using a fuel injection amount map for each of the two predetermined rpm of the gas engine in the case of using a tragene system that utilizes exhaust gas from which noxious gases have been removed for the purpose of carbon dioxide fertilization .

The present invention provides a tragene system using a liquefied petroleum gas and a natural gas common engine and a control method thereof, in which, when one fuel supply is interrupted or is not smoothly supplied, the system is automatically switched to another fuel, There is an advantage that continuous operation of the traizen system can be performed.

In addition, even if the type of the fuel supplied to the gas engine is changed, the output and efficiency of the gas engine are not lowered and the noxious gas in the exhaust gas is not increased, so that the heating, cooling and electricity can be utilized stably, It is also stable and easy to utilize even when carbon dioxide is used.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an electric, cooling and heating supply apparatus using a conventional generator or a GHP system; FIG.
Fig. 2 and Fig. 3 are diagrams showing a traizen system using liquefied petroleum gas and natural gas common engines according to the first and second embodiments of the present invention; Fig.
4 is a conceptual diagram showing a traizen system using a liquefied petroleum gas and a natural gas common engine according to the present invention.
5 and 6 are schematic diagrams showing a configuration for controlling a mixer and an air-fuel ratio according to the present invention;

Hereinafter, the traizen system using the liquefied petroleum gas and natural gas common engine of the present invention and the control method thereof will be described in detail with reference to the accompanying drawings.

<TRIZEN System>

2 and 3 are diagrams showing a traizen system using liquefied petroleum gas and natural gas common engines according to the first and second embodiments of the present invention, FIG. 2 is a conceptual diagram showing a traizen system using a natural gas common engine. FIG.

As shown in the drawing, the traizen system 1000 using the liquefied petroleum gas and the natural gas common engine of the present invention can be utilized for cooling, heating, and carbon dioxide application using the gas engine 300, (100) for supplying liquefied petroleum gas to the gas engine (300), the liquefied petroleum gas supply unit (100) being connected to the gas engine (300); A natural gas supply unit 200 connected to the gas engine 300 and capable of supplying natural gas to the gas engine 300; A mixer 310 that receives fuel from the liquefied petroleum gas supply unit 100 or the natural gas supply unit 200 and injects fuel to the gas engine 300; A controller 400 for selecting one of the fuel according to the fuel amount of the liquefied petroleum gas supply unit 100 and the fuel amount of the natural gas supply unit 200 and supplying the selected fuel to the mixer 310; . &Lt; / RTI &gt;

First, the gas engine 300 can be an engine driven using relatively low-cost gaseous fuels such as liquefied petroleum gas, natural gas, city gas, biogas, and renewable fuels.

The tri-generation system according to the present invention can be used for cooling, heating, and carbon dioxide application using the gas engine 300, or for applying electricity, heating, and carbon dioxide. In addition, A system that can be utilized for both cooling, heating, electricity, and carbon dioxide fertilization using the cooling system 300, or a system in which one or more of cooling, heating, electricity, and carbon dioxide fertilization are combined.

Here, the traizen system according to the present invention includes a liquefied petroleum gas supply unit 100 and a natural gas supply unit 200, and selects one of the two fuels, The fuel can be injected into the combustion chamber.

The mixer 310 mixes the supplied gaseous fuel with air from the outside to inject the mixed gas mixture into the gas engine 300. The mixed gas in the mixer 310 is supplied to the throttle valve throttle valve to the combustion chamber of the gas engine.

The control unit 400 may be an ECU for controlling the gas engine 300. The control unit 400 may select any fuel according to the fuel amount of the liquefied petroleum gas supply unit 100 and the natural gas supply unit 200 To be supplied to the mixer 310. In other words, if one of the used fuel becomes insufficient, it can be used as another fuel.

Thus, the traizen system using the liquefied petroleum gas and the natural gas common engine of the present invention can automatically switch to another fuel when one fuel supply is cut off or is not supplied smoothly, The system can now be put into operation.

[Example 1]

The trailer system according to the present invention utilizes the cooling water of the radiator 520 for cooling the gas engine 300 and the exhaust heat of the exhaust pipe 370 for heating and is connected to the compressor 300 driven by the gas engine 300, And is utilized for cooling by using the refrigerant compressed by the exhaust gas purifier 500. The exhaust gas from which harmful gases have been removed through the three-way catalyst 380 installed in the exhaust pipe 370 of the gas engine 300 is used for fertilizing carbon dioxide Lt; / RTI &gt;

That is, as shown in FIG. 2, the gas engine 300 can be utilized for heating by using heat generated as the fuel is burned, and the compressor 500 is connected to the gas engine 300 to rotate together to compress the refrigerant, HC, CO, and CO, which are harmful gases in the exhaust gas discharged after combustion in the gas engine 300 by the control of the gas engine 300 and the three-way catalyst 370, can be utilized for cooling by using the refrigerant. (NO _x ) is removed and carbon dioxide (CO ₂ ) in the exhaust gas can be utilized.

At this time, the control unit 400 is connected to the gas engine 300 to control the gas engine 300, and the control unit 400 can control the supply of gas fuel, the output of the engine, the air-fuel ratio and the three-way catalyst, The amount of generated noxious gases contained in the exhaust gas can be reduced and the generated noxious gases can be removed through the three-way catalyst.

The gas engine 300 can be utilized for heating the building 600 or the greenhouse 700 by using the cooling water that is heated while being cooled while the gas engine 400 is cooled and the exhaust heat of the exhaust pipe 370 is utilized, The refrigerant compressed by the compressor 500 driven by the compressor 500 can be used for cooling the building 600 or the greenhouse 700. The exhaust gas from which the noxious gases have been removed can be used as a greenhouse 700) to be used for carbon dioxide fertilization required for growing crops. At this time, the temperature of the cooling water is about 80 DEG C and the temperature of the exhaust gas discharged through the exhaust pipe 370 is about 300 DEG C or more. Therefore, the cooling water and the exhaust heat can be used together as heating and hot water. Only one of the exhaust heat can be used as heating and hot water. A heat exchanger is installed in the exhaust pipe 370 to utilize the exhaust heat, and the heated water is sent to a separate hot water tank connected through the heat exchanger to be used as heating and hot water.

[Example 2]

The cooling water of the radiator 520 for cooling the gas engine 300 and the heat of exhaust of the exhaust pipe 370 are utilized by utilizing electricity generated by the generator 510 connected to the gas engine 300 And can be configured to utilize the exhaust gas from which harmful gases have been removed through the three-way catalyst 380 installed in the exhaust pipe 370 of the gas engine 300 for carbon dioxide fertilization.

That is, as shown in FIG. 3, the generator 510 is connected to the gas engine 300 to be rotated together to generate electricity, which can be utilized in the building 600 or the greenhouse 700. In the gas engine 300, (HC), which are harmful gases in the exhaust gas discharged after combustion in the gas engine 300 by the control of the gas engine 300 and the three-way catalyst 370, can be utilized for heating by using the heat generated as the combustion is performed. Carbon monoxide (CO) and nitrogen oxides (NO _x ) are removed and carbon dioxide (CO ₂ ) in the exhaust gas can be utilized.

In the following, a configuration for supplying one of the two fuel types to the gas engine 300 of the traizen system according to the fuel amount of the two types of fuel will be described.

The liquefied petroleum gas supply unit 100 is connected to a liquefied petroleum gas supply source 110 through a liquefied petroleum gas supply line 120 and supplies the liquefied petroleum gas supply control valve 130 A first pressure and temperature sensor 140 is installed at a front end of the liquefied petroleum gas supply control valve 130 and the natural gas supply unit 200 is connected to a natural gas supply line 210 A natural gas supply control valve 230 is installed in the natural gas supply line 220 and a second pressure and temperature sensor 240 is installed at a front end of the natural gas supply control valve 230 The control unit 400 controls the operation of the mixer 310, the gas engine 300, the liquefied petroleum gas supply control valve 130, the first pressure and temperature sensor 140, the natural gas supply control valve 230, 2 pressure and temperature sensor 240 so that the pressure and temperature of the liquefied petroleum gas feed line 120 and the temperature Of the natural gas feed line and the control pressure supplied to the temperature of the LPG 220, the valve 130 and the natural gas feed control valve 230 may be configured to selectively open either.

The liquefied petroleum gas supply unit 100 may include a liquefied petroleum gas supply source 110, a liquefied petroleum gas supply line 120, a liquefied petroleum gas supply control valve 130 and a first pressure and temperature sensor 140 . The liquefied petroleum gas supply source 110 may be a liquefied petroleum gas tank or a pipeline. The liquefied petroleum gas (LPG) may be butane or propane. However, . The liquefied petroleum gas supply line 120 is connected to the liquefied petroleum gas supply source 110 and the liquefied petroleum gas vaporized in the liquefied petroleum gas supply source 110 is supplied to the gas engine side along the liquefied petroleum gas supply line 120 through the regulator . At this time, a liquefied petroleum gas supply control valve 130 is installed in the liquefied petroleum gas supply line 120 to open or shut off the liquefied petroleum gas supply line 120 by operating the liquefied petroleum gas supply control valve 130 . The liquefied petroleum gas supply line 120 is provided with a first pressure and temperature sensor 140 and is installed at a front end of the liquefied petroleum gas supply control valve 130 to supply liquefied petroleum gas To measure the pressure and temperature of the fluid.

The natural gas supply unit 200 may include a natural gas supply source 210, a natural gas supply line 220, a natural gas supply control valve 230 and a second pressure and temperature sensor 240. The natural gas supply source 210 may be a natural gas tank or a pipeline and the natural gas NG may be any one of liquefied natural gas (LNG), compressed natural gas (CNG), and pipe natural gas (PNG) . The natural gas supply line 220 is connected to the natural gas supply source 210 and the natural gas vaporized in the natural gas supply source 210 may be supplied to the gas engine side along the natural gas supply line 220. At this time, a natural gas supply control valve 230 is installed in the natural gas supply line 220 to open or shut off the natural gas supply line 220 by operating the natural gas supply control valve 230. The second pressure and temperature sensor 240 is installed in the natural gas supply line 220 and is installed at a front end of the natural gas supply control valve 230 to control the pressure and temperature of the natural gas filled in the natural gas supply line 220, Can be measured.

Either one of the liquefied petroleum gas supply regulating valve 130 and the natural gas supply regulating valve 230 is operated according to the pressure and temperature of the liquefied petroleum gas supply line 120 and the pressure and temperature of the natural gas supply line 220 To selectively use one of the liquefied petroleum gas or the natural gas. That is, when liquefied petroleum gas in the liquefied petroleum gas supply unit 100 is insufficient during use of the liquefied petroleum gas as fuel, the liquefied petroleum gas supply line 120 is shut off and the natural gas supply line 220 is opened, The natural gas supply line 220 is shut off and the liquefied petroleum gas supply line 120 is opened when the natural gas of the natural gas supply unit 200 is insufficient, It is automatic switching to use gas as fuel. At this time, it is possible to detect whether or not the liquefied petroleum gas is insufficient through the first pressure and temperature sensor 140, and to detect whether the natural gas is insufficient through the second pressure and temperature sensor 240. Here, the pressure and temperature of the LPG and natural gas can be detected at the same time to more accurately determine if the fuel is low.

If natural gas pipelines are damaged due to disasters such as earthquakes, the supply of fuel is interrupted, or the pressure of supplied fuel is abnormal, , It is possible to immediately switch to liquefied petroleum gas to enable continuous and stable operation of the gas engine.

The liquefied petroleum gas supply unit 100 and the natural gas supply unit 200 are connected in parallel so that one fuel selected from the two fuels is supplied to the mixer 310 through the common pressure regulator 810 can do.

That is, the liquefied petroleum gas supply unit 100 and the natural gas supply unit 200 are connected in parallel so that the liquefied petroleum gas supply line 120 and the natural gas supply line 220 are connected to one fuel supply line 340, The pressure of the liquefied petroleum gas or the natural gas can be regulated through the pressure regulator 810 and supplied to the mixer 310. [ 5, a filter 830 and an opening / closing valve 820 for controlling the opening / closing of the common pressure regulator 810 may be installed at the front end of the common pressure regulator 810.

A fuel supply line 340 for supplying fuel to the mixer 310 is provided with a supply fuel pressure sensor 350 and the supply fuel pressure sensor 350 may be connected to the control unit 400.

This is to measure the pressure of the fuel supplied to the mixer 310 with the supply fuel pressure sensor 350 so that the pressure can be controlled when the measured pressure deviates from the set value. That is, as described above, the pressure of the fuel supplied to the mixer 310 can be adjusted by using the common pressure regulator 810. However, since the general pressure regulator is a mechanical type, errors of pressure control occur frequently, The pressure may be varied in the process, so that the air-fuel ratio can be controlled by controlling the mixer 310 at this time. In addition, the output of the gas engine 300 may be controlled by controlling the ignition timing of the gas engine 300 in conjunction with the control of the mixer 310. Thus, even if the pressure of the fuel supplied to the mixer 310 varies, the gas engine 300 can be stably driven.

The mixer 310 mixes the fuel supplied through the fuel supply line 340 with the external air and supplies the mixture to the gas engine 300. The mixer 310 is connected to the fuel supply line 340 A main control valve 320 for controlling the flow of fuel into the mixer 310 and a solenoid valve 330 connected to the fuel supply line 340 for additionally controlling the flow of fuel into the mixer 310 are connected in parallel Can be installed.

5 and 6, two fuel lines may be branched to two fuel lines in one fuel supply line 340, and two fuel lines may be connected to the mixer 310. In one of the branched fuel lines, A regulating valve 320 may be provided and a solenoid valve 330 may be installed in the other fuel line.

Therefore, when there is pressure fluctuation of the supplied fuel within a specific range before and after the reference value with the reference value of 1.5 kpa, which is generally supplied, the solenoid valve 330 is closed and only the main control valve 320 is operated The amount of fuel flowing into the mixer 310 can be controlled to a desired air-fuel ratio. When the pressure fluctuation of the fuel is supplied at a lower pressure beyond the specific range, only the main control valve 320 can be adjusted to the desired air-fuel ratio, so that the solenoid valve 330 is opened The main control valve 320 may be controlled to control the amount of fuel flowing into the mixer 310 to a desired air-fuel ratio.

<Control method>

The control method of the tragene system using the liquefied petroleum gas and the natural gas common engine according to the present invention can be applied to the cooling, heating and carbon dioxide application by using the gas engine 300 or by using the gas engine 300 to control electricity, A mixer that mixes fuel and air is supplied to the gas engine 300 of the traizen system utilized for fertilization so that the mixed gas is combusted by selecting one of the liquefied petroleum gas and natural gas, 310, the control method of the tragene system using the liquefied petroleum gas and the natural gas common engine, comprises the steps of controlling the ignition timing according to the selected fuel, applying the common compression ratio, and controlling the pressure fluctuation of the fuel supplied to the mixer 310 The air-fuel ratio control according to the present invention can control the gas engine 300 using any one or two or more methods.

That is, when one fuel supply is interrupted or is not smoothly supplied, the other one of the fuel is automatically switched, so that the continuous operation of the tragene system can be performed without stopping the gas engine, and the fuel It is possible to control the ignition timing of the gas engine 300 according to the selected fuel or apply the compression ratio of the engine so that the liquefied petroleum gas and the natural gas can be used in common, By controlling the air-fuel ratio according to the pressure fluctuation, the output and efficiency of the gas engine are not lowered and the noxious gas in the exhaust gas is not increased, so that the heating, cooling and electricity can be stably utilized. And can be utilized easily.

Further, the ignition timing control method can control the degree of advancement of the ignition timing for each of the liquefied petroleum gas and the natural gas fuel according to the variation of the load acting on the gas engine.

That is, the ignition timing is set differently for the liquefied petroleum gas and the natural gas, respectively, and when the fuel is switched, the gas engine can be controlled by applying the ignition timing data for the corresponding fuel. At this time, the ignition timing can be an ignition timing at which the maximum engine output can be obtained, and the ignition timing data can be a before top dead center (BTDC) value of the piston. Here, the corresponding ignition timing is controlled according to the fuel selected as described above, and the ignition timing advance degree (BTDC value) can be adjusted according to the load variation of the gas engine in the fuel to be used. For example, as shown in Table 1 below, the ignition timing advancing data for the fuel used for each fuel is applied, and data in which the ignition timing advance value is set differently according to the engine load in each fuel is input to the control unit 400 The ignition timing control data corresponding to the fuel to be used can be changed to control the gas engine to be driven. Accordingly, the maximum output and the maximum efficiency of the gas engine can be obtained even if the fuel used is changed.

[Table 1]

Table 1 shows the BTDC angles corresponding to the maximum spark advanced for best torque (MBT) per engine load, based on 1,800rpm of the D4BB engine (2500cc, 4 cylinder). And the engine shows a low output value at a value other than the above value.

Further, in the method of applying the common compression ratio, a gas engine having a common compression ratio in which knocking does not occur with respect to the liquefied petroleum gas and the natural gas fuel may be used.

That is, a gas engine having a common compression ratio can be used so that abnormal combustion phenomena such as knocking do not occur even when the fuel used is switched. At this time, the propane in the liquefied petroleum gas has an octane number of 125 and a natural gas of 135, and the maximum compression ratio is about 11.0 for the propane and 12.0 for the natural gas, so that the compression ratio that can be used commonly is about 10.5 to 11.5 And it is generally preferable to use a compression ratio of 11.0.

Also, the air-fuel ratio control method may include: measuring a pressure of fuel supplied to the mixer 310 (SA10); The fuel injection amount data corresponding to the pressure of the fuel supplied to the mixer 310 is inquired in the fuel injection amount map previously set for the pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer 310, (SA20); (SA30) correcting the searched fuel injection quantity data according to the temperature of the fuel supplied to the mixer (310) and the oxygen concentration of the air; And controlling the mixer (310) using the corrected fuel injection amount data (SA40); . &Lt; / RTI &gt;

More particularly, the present invention relates to a fuel supply system for an internal combustion engine, comprising: The injection amount map is previously input to the control unit 400. [ After the fuel injection quantity data corresponding to the measured fuel pressure is inquired, the inquired fuel injection quantity data is corrected according to the temperature of the fuel supplied to the mixer 310 and the oxygen concentration of the air, The air-fuel ratio can be controlled by controlling the mixer 310 by using the injection amount data and controlling the amount of fuel injected into the mixer 310.

At this time, when the measured pressure of the supplied fuel is a value between arbitrarily designated pressure values other than the arbitrarily specified pressure value, it is possible to apply the fuel injection amount data by correcting it using an interpolation method.

Thus, the gas engine can be controlled at a desired air-fuel ratio even if the pressure of the fuel supplied to the mixer 310 changes or the supply pressure of the fuel changes, depending on the change of the fuel to be used. And the noxious gas in the exhaust gas can be reduced.

Also, the ignition timing control and the air-fuel ratio control method may include: a step SB10 of measuring the pressure of the fuel supplied to the mixer 310; Corresponding to the pressure of the fuel supplied to the mixer 310, in the ignition timing map and the fuel injection amount map previously set for the pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer 310, And inquiring the fuel injection amount data in step SB20; (SB30) correcting the searched ignition timing data and the fuel injection amount data according to the temperature of the fuel supplied to the mixer 310 and the oxygen concentration of the air; And controlling the gas engine (300) and the mixer (310) using the corrected ignition timing data and the fuel injection amount data (SB40); . &Lt; / RTI &gt;

This is to control the air-fuel ratio by controlling the mixer 310 using a fuel injection amount map previously set in the same manner as the above-mentioned air-fuel ratio control method, and to control the ignition timing of the gas engine 300 by using the preset ignition timing map. Thus, it is possible to control the gas engine to be driven at the maximum output even if the pressure of the fuel supplied to the mixer 310 changes or the supply pressure of the fuel changes, The output of the gas engine can be minimized so that the efficiency can be improved, the stable driving can be performed, and the noxious gas in the exhaust gas can be reduced.

The cooling water of the radiator 520 cooling the gas engine 300 and the heat of exhaust of the exhaust pipe 370 are utilized for heating and compressed by the compressor 500 connected to the gas engine 300 In a trazhen system in which the refrigerant is utilized for cooling and the exhaust gas from which harmful gases are removed through the three-way catalyst 380 installed in the exhaust pipe 370 of the gas engine 300 is used for fertilizing carbon dioxide, The ignition timing map and the fuel injection amount map for the engine speed change (rpm) or the load variation can be further used to control the ignition timing and the air-fuel ratio.

That is, in the above-described Traizen system, the number of revolutions or the load of the gas engine required for heating, cooling, and carbon dioxide fertilization may be varied. Therefore, an ignition timing map for the fluctuation range of the rpm or the load fluctuation range of the gas engine 300 The ignition timing and the air-fuel ratio can be controlled using the fuel injection amount map, and the gas engine can be driven at a desired air-fuel ratio while maintaining the maximum output of the gas engine.

The cooling water of the radiator 520 for cooling the gas engine 300 and the heat of exhaust of the exhaust pipe 370 are utilized by utilizing electricity generated by the generator 510 connected to the gas engine 300 In the traizen system, which is utilized for heating and utilizes exhaust gas from which toxic gases have been removed through the three-way catalyst 380 installed in the exhaust pipe 370 of the gas engine 300 to fertilize the carbon dioxide, The fuel injection amount map for each of the two sets of revolutions (rpm) of the air-fuel ratio can be further used to control the air-fuel ratio.

That is, in the above-described Traizen system, since the generator 510 is connected to the gas engine 300 and driven, it is possible to produce 1,800 rpm for producing 60 hz electricity, which is the set rpm, and 1,500 rpm for producing 50 hz electricity. Fuel ratio using the fuel injection amount map, so that the gas engine can be driven at a desired air-fuel ratio even if the number of revolutions of the gas engine is changed.

In addition, the tri-generation system of the present invention can be used as a traizen system that utilizes the gas engine 300 for cooling, heating, and carbon dioxide application, or for application of electricity, heating, and carbon dioxide. A system that can be utilized for both cooling, heating, electricity, and carbon dioxide fertilization using the gas engine 300, or a system in which any one or more of cooling, heating, electricity, and carbon dioxide fertilization are combined or the like.

Further, by controlling the lambda of the gas engine 300 to the stoichiometric air-fuel ratio (lambda = 1), the nitrogen oxide (NO _x ) in the exhaust gas can be reduced by the lambda control of the control unit 400, The hydrocarbon (HC) and the carbon monoxide (CO) contained in the exhaust gas are removed by the catalyst 380 so that the exhaust gas after being burned in the gas engine 300 is directly supplied into the greenhouse 700, Can be done.

The exhaust pipe 370 of the gas engine 300 is connected to a supply pipe 710 for supplying carbon dioxide and the supply pipe 710 is provided with a three-way valve 730 so that the discharge pipe 720 is branched. Can be connected. That is, the three-way valve 730 may be controlled to supply the exhaust gas to the greenhouse 700 through the supply pipe 710 connected to the exhaust pipe 370, so that the greenhouse 700 can be utilized for the carbon dioxide application. It is possible to exhaust the exhaust gas into the atmosphere outside the greenhouse 700 through the exhaust pipe 720 connected to the three-way valve 730, if necessary. Further, after the gas engine 300 is operated, the exhaust gas is discharged to the outside through the exhaust pipe 720 before the three-way catalyst 380 reaches the activation temperature, and when the three-way catalyst 380 reaches the activation temperature After the noxious gas contained in the exhaust gas is removed, the exhaust gas can be supplied to the greenhouse 700 through the carbon dioxide feed pipe 710. Since the three-way catalyst 380 is not heated at the initial start of the gas engine 300, the removal efficiency of the noxious gas contained in the exhaust gas is low. Therefore, the exhaust gas is discharged through the exhaust pipe 720 After the exhaust gas is discharged outside the greenhouse 700 and the three-way catalyst 380 is heated to reach the activation temperature, the removal efficiency of the noxious gases contained in the exhaust gas is high, so that the concentration of the noxious gas is reduced to about 50 ppm or less The harmful gases are removed and exhaust gas suitable for the growth of the crop can be supplied to the greenhouse 700 through the supply pipe 710 to be used for fertilizing the carbon dioxide.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: Traigen system using liquefied petroleum gas and natural gas common engine
100: liquefied petroleum gas supply part
110: liquefied petroleum gas supply source 120: liquefied petroleum gas supply line
130: liquefied petroleum gas supply regulating valve 140: first pressure and temperature sensor
150: vaporizer
200: Natural gas supply unit
210: natural gas supply source 220: natural gas supply line
230: natural gas supply regulating valve 240: second pressure and temperature sensor
250: vaporizer
300: Gas engine 310: Mixer
320: main control valve 330: solenoid valve
340: fuel supply line 350: supply fuel pressure sensor
360: intake duct 370: exhaust pipe
380: Three-way catalyst
400: control unit 410:
500: compressor 510: generator
520: Radiator
600: Building
700: Greenhouse (Greenhouse, Facilities House)
710: Supply piping 720: Discharge piping
730: Three Way Valve
810: common pressure regulator 820: opening / closing valve
830: Filter

Claims (14)

In a trazhen system that utilizes a gas engine for cooling, heating and carbon dioxide fertilizing, or for gas, electric, heating, and carbon dioxide fertilization,
A liquefied petroleum gas supply unit connected to the gas engine and capable of supplying liquefied petroleum gas to the gas engine;
A natural gas supply unit connected to the gas engine and capable of supplying natural gas to the gas engine;
A mixer that receives fuel from the liquefied petroleum gas supply unit or the natural gas supply unit and injects fuel into the gas engine; And
A controller for selecting any one of the fuel according to the fuel amount of the liquefied petroleum gas supply unit and the fuel amount of the natural gas supply unit and supplying the selected fuel to the mixer; And,
A supply fuel pressure sensor is installed in the fuel supply line to which the fuel is supplied to the mixer, the supply fuel pressure sensor is installed between the common pressure regulator and the mixer, the supply fuel pressure sensor is connected to the control unit,
The mixer mixes the fuel supplied through the fuel supply line and the outside air to supply it to the gas engine,
The mixer is provided with a main control valve connected to the fuel supply line for controlling the amount of fuel flowing into the mixer and a solenoid valve connected to the fuel supply line for additionally controlling the amount of fuel flowing into the mixer TRIZEN system using liquefied petroleum gas and natural gas common engine.
The method according to claim 1,
Wherein the gas engine is used for heating by using cooling water of a radiator for cooling the gas engine and exhaust heat of an exhaust pipe and is utilized for cooling by using refrigerant compressed by a compressor driven by the gas engine, And the exhaust gas from which harmful gases have been removed is utilized for the fertilization of carbon dioxide. The traizen system using the liquefied petroleum gas and natural gas common engine.
The method according to claim 1,
The exhaust gas heat exchanger of the present invention utilizes electricity generated by a generator connected to the gas engine and utilizes the cooling water of a radiator for cooling the gas engine and exhaust heat of an exhaust pipe to heat the exhaust gas. Wherein the gas is used for fertilizing carbon dioxide by using the exhaust gas from which the gases have been removed.
The method according to claim 1,
The liquefied petroleum gas supply unit includes a liquefied petroleum gas supply line connected to a liquefied petroleum gas supply line, a liquefied petroleum gas supply control valve installed in the liquefied petroleum gas supply line, A temperature sensor is installed,
The natural gas supply unit includes a natural gas supply line connected to a natural gas supply source, a natural gas supply control valve installed in the natural gas supply line, a second pressure and temperature sensor disposed in front of the natural gas supply control valve, ,
The control unit is connected to the mixer, the gas engine, the liquefied petroleum gas supply control valve, the first pressure and temperature sensor, the natural gas supply control valve and the second pressure and temperature sensor, And selectively opening one of the liquefied petroleum gas supply control valve and the natural gas supply control valve in accordance with the pressure and temperature of the natural gas supply line. .
5. The method of claim 4,
Wherein the liquefied petroleum gas supply unit and the natural gas supply unit are connected in parallel so that one fuel selected automatically from the two fuels is supplied to the mixer through a common pressure regulator. TRIZEN System.
delete delete The gas engine of the TRIZEN system, which is used for cooling, heating and carbon dioxide fertilization by using a gas engine or for gasification of electricity, heating and carbon dioxide using a gas engine, is supplied with a mixer which mixes fuel and air, A control method of a tragene system using a liquefied petroleum gas and a natural gas common engine according to any one of claims 1 to 5, wherein any one of liquefied petroleum gas and natural gas is selected and supplied to a mixer,
When there is a pressure fluctuation of the supplied fuel within a specific range before or after the pressure reference value of the fuel supplied to the mixer, the amount of fuel flowing into the mixer is adjusted using only the main control valve in a state where the solenoid valve is closed, Control,
When the pressure fluctuation of the fuel supplied to the mixer is supplied at a lower pressure beyond a specific range, the main control valve is adjusted to open the solenoid valve so that fuel can be further introduced into the mixer Controlling the fuel amount to a desired air-fuel ratio,
Characterized in that the gas engine is controlled by using one or more of the following methods: controlling the ignition timing according to the selected fuel, applying the common compression ratio, and controlling the air-fuel ratio according to the pressure fluctuation of the fuel supplied to the mixer Control method of traizen system using engine.
9. The method of claim 8,
The ignition timing control method includes:
Wherein the ignition timing advancing degree of each of the liquefied petroleum gas and the natural gas fuel is adjusted in accordance with a variation of a load acting on the gas engine.
9. The method of claim 8,
The common compression ratio applying method includes:
Wherein a gas engine having a common compression ratio in which knocking does not occur with respect to the liquefied petroleum gas and the natural gas fuel is used.
9. The method of claim 8,
In the air-fuel ratio control method,
Measuring a pressure of fuel supplied to the mixer (SA10);
(SA20) of the fuel injection quantity data corresponding to the pressure of the fuel supplied to the mixer in a fuel injection quantity map previously set for pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer;
(SA30) correcting the searched fuel injection quantity data according to the temperature of the fuel supplied to the mixer and the oxygen concentration of the air; And
Controlling the mixer using the corrected fuel injection amount data (SA40); And a control unit for controlling the operation of the tragic system using the liquefied petroleum gas and the natural gas common engine.
9. The method of claim 8,
The ignition timing control and the air-
Measuring a pressure of fuel supplied to the mixer (SB10);
The ignition timing data and the fuel injection amount data corresponding to the pressure of the fuel supplied to the mixer are inquired in the ignition timing map and the fuel injection amount map previously set for the pressure values within a specific range before and after the pressure reference value of the fuel supplied to the mixer (Step SB20);
(SB30) correcting the searched ignition timing data and the fuel injection amount data according to the temperature of the fuel supplied to the mixer and the oxygen concentration of the air; And
(SB40) controlling the gas engine and the mixer using the corrected ignition timing data and fuel injection amount data; And a control unit for controlling the operation of the tragic system using the liquefied petroleum gas and the natural gas common engine.
13. The method of claim 12,
Wherein the gas engine is used for heating by using cooling water of a radiator for cooling the gas engine and exhaust heat of an exhaust pipe and is utilized for cooling by using refrigerant compressed by a compressor driven by the gas engine, In the TRIZENE system, which utilizes the exhaust gas from which harmful gases have been removed through the use of the exhaust gas to fertilize the carbon dioxide,
Wherein the ignition timing map and the fuel injection amount map for the fluctuation of the rpm of the gas engine or the load fluctuation are further used to control the ignition timing and the air-fuel ratio. Control method.
12. The method of claim 11,
The exhaust gas heat exchanger of the present invention utilizes electricity generated by a generator connected to the gas engine and utilizes the cooling water of a radiator for cooling the gas engine and exhaust heat of an exhaust pipe to heat the exhaust gas. In the TRIZENE system, which utilizes the exhaust gas from which gases have been removed to fertilize the carbon dioxide,
Wherein the air-fuel ratio is controlled by further using a fuel injection amount map for each of the two predetermined rpm of the gas engine to control the air-fuel ratio.

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