JP2017172341A - Engine system and engine power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine system capable sufficiently restraining occurrence of starting congestion trouble and an engine power generation system having this engine system capable of positively executing a demand monitoring control.SOLUTION: This invention is constituted in such a way that there are provided an electric cooling liquid pump 5 for circulating cooling liquid through a cooling liquid circulation passage 1; a cooling liquid electric heater 6 for heating the liquid flowing through an external cooling liquid flow passage 3; an electric lubricant oil pump 15 for circulating lubricant oil through a lubricant oil circulation passage 11; a lubricant oil electric heater 16 for heating lubricant liquid flowing through an external lubricant oil flow passage 13, and when a specified heating operation condition is satisfied during engine stopped state of an engine main body 21, an operation control means 22 executes a processing for starting all the electric cooling liquid pump 5, the cooling liquid electric heater 6, the electric lubricant oil pump 15 and the lubricant oil electric heater 16.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a coolant circulation path configured in a closed loop by an internal coolant flow path that passes through the engine body and an external coolant flow path outside the engine body, and obtains a driving force from the engine body to obtain a coolant circulation path. An engine-driven coolant pump that circulates the coolant through, an electric coolant pump that circulates the coolant through the coolant circulation path, an electric heater for the coolant that heats the coolant flowing through the external coolant channel, Lubricating oil circulation path that is configured in a closed loop by an internal lubricating oil flow path that passes through the inside of the engine body and an external lubricating oil flow path outside the engine body, and obtains a driving force from the engine body and passes the lubricating oil through the lubricating oil circulation path. An engine-driven lubricating oil pump that circulates, an electric lubricating oil pump that circulates lubricating oil through the lubricating oil circulation path, an electric heater for lubricating oil that heats the lubricating liquid flowing through the external lubricating oil flow path, and operation Engine system and operation control means for controlling is provided, and is driven by the engine system, an engine power generation system provided with a generator for supplying the generated power to supply area system.

Such an engine system is used, for example, for driving a generator or the like, and uses a coolant circulation system that circulates coolant through the inside and outside of the engine body using a coolant circulation path, and a lubricating oil circulation path. A lubricating oil circulation system for circulating lubricating oil through the inside and outside of the engine body is provided.
The coolant circulation path is configured in a closed loop by an internal coolant flow path that passes through the inside of the engine body and an external coolant flow path outside the engine body, and the coolant circulation system is connected to the coolant circulation system when the engine is operating. An engine-driven coolant pump that obtains driving force from the engine body and circulates the coolant through the coolant circulation path is provided.
The lubricating oil circulation path is configured in a closed loop by an internal lubricating oil flow path that passes through the engine body and an external lubricating oil flow path outside the engine body. The lubricating oil circulation system is driven from the engine body when the engine is operating. An engine-driven lubricating oil pump that obtains force and circulates lubricating oil through the lubricating oil circulation path is provided (for example, see Patent Document 1).

By the way, in such an engine system, when the temperature of the coolant or the lubricating oil is low at the time of starting the engine body, a so-called start-up congestion trouble may occur and the engine body may not be started.
To explain the start-up congestion problem, when starting the engine body, the crankshaft is rotated by the starter motor to start the combustion stroke. At that time, the combustion stroke does not proceed normally, and the crankshaft is specified. If the number of revolutions is not reached, a start-up congestion trouble will occur.
That is, when the temperature of the coolant is low, the temperature of the combustion chamber of the engine body is low, so the ignitability is poor and the combustion stroke does not proceed normally, so the crankshaft does not reach the specified rotational speed, Prone to start-up congestion problems.
In addition, when the temperature of the lubricating oil is low, the viscosity of the lubricating oil increases, and therefore a large load is applied to rotate the crankshaft. Therefore, the crankshaft does not reach the specified rotational speed, and a start-up congestion trouble is likely to occur. .

  Therefore, in such an engine system, an electric coolant pump that circulates the coolant through the coolant circulation path (refer to the above-mentioned Patent Document 1) so that the engine main body can be appropriately started while avoiding the start-up congestion trouble. (Not described), an electric heater for cooling liquid that heats the cooling liquid flowing through the external cooling liquid flow path of the cooling liquid circulation path, and an electric lubricating oil pump that circulates the lubricating oil through the lubricating oil circulation path (the above-mentioned patent documents) 1 and a lubricating oil electric heater that heats the lubricating fluid flowing through the external lubricating oil flow path of the lubricating oil circulation path.

  In such an engine system, which is not conventionally described in Patent Document 1, when the temperature of the coolant in the coolant circulation path becomes equal to or lower than a predetermined coolant lower limit temperature, an electric heater for coolant is used. And a process for starting the electric coolant pump, and when the temperature of the lubricating oil in the lubricating oil circulation path falls below the predetermined lubricating oil lower limit temperature, the electric heater for lubricating oil and the electric lubricating oil pump are started. Was configured to perform processing.

Japanese Patent Laid-Open No. 10-8955

However, in the conventional engine system, when any one of the electric heater for coolant, the electric coolant pump, the electric heater for lubricating oil, and the electric lubricating oil pump fails, the occurrence of start-up congestion trouble is sufficiently suppressed. There was a problem that could not.
For example, when the electric heater for the coolant is broken, the temperature of the coolant in the coolant circulation path becomes lower than the lower limit temperature of the coolant, and the process of starting the electric heater for the coolant and the electric coolant pump is started. Even if it is executed, the electric coolant pump is activated and the coolant is circulated through the coolant circulation path, but the coolant heater is not activated, so that the coolant circulating through the coolant circulation path is not heated. Therefore, since the temperature of the coolant in the internal coolant flow path in the engine body remains low, the temperature of the combustion chamber of the engine body does not rise, and it is easy to cause a start-up congestion problem.
Also, if the electric coolant pump fails, the electric heater for the coolant and the electric heater for the electric motor for cooling will operate even if the electric heater for the electric coolant for cooling and the processing for starting the electric coolant pump are executed. The coolant is not circulated through the coolant circulation path. Therefore, in this case as well, since the temperature of the coolant in the internal coolant flow path in the engine body remains low, the temperature of the combustion chamber of the engine body does not rise, so it is easy to cause a start-up congestion trouble.

If the lubricating oil heater fails, even if the lubricating oil temperature in the lubricating oil circulation circuit falls below the lower limit temperature of the lubricating oil, and the process of starting the lubricating oil heater and the electric lubricating oil pump is executed, Although the oil pump is operated and the lubricating oil is circulated through the lubricating oil circulation path, the lubricating oil electric heater is not operated, so that the lubricating oil circulating in the lubricating oil circulation path is not heated. Accordingly, since the temperature of the lubricating oil in the internal lubricating oil flow path in the engine body remains low, a large load is applied to rotate the crankshaft, so that a start-up congestion trouble is likely to occur.
Also, if the electric lubricant pump fails, the electric lubricant pump will not operate even though the electric heater for lubricating oil will operate even if the electric heater for lubricating oil and the processing to start the electric lubricating oil pump are executed. The lubricating oil is not circulated through the lubricating oil circulation path. Therefore, in this case as well, since the temperature of the lubricating oil in the internal lubricating oil flow path in the engine body remains low, a large load is applied to rotate the crankshaft, so that it is easy to cause a start-up congestion trouble.
Therefore, in such an engine system, it is desired to suppress the occurrence of a start-up congestion trouble.

By the way, such an engine system may be provided for driving a generator in an engine power generation system including a generator that supplies generated power to a system in a supply area.
In such a power generation system, a receiving power meter that measures the received power from the commercial power system is provided at a power receiving point that connects the system in the supply area to the commercial power system, and based on the measurement information of the received power meter, A so-called demand monitoring control for starting the engine system is executed so that the demand value does not exceed the contract power.

As a power receiving contract between a power company and a customer, for example, the maximum demand power, which is the maximum value of monthly demand power in the supply area, becomes the demand value of each month, and the contract power has been In a state where the demand value is set to the maximum value among the demand values of In this case, if the demand value exceeds the contracted power, the contracted power will be updated to the maximum demand power that has been exceeded from the following month, the basic power charge will increase, and the contracted power will be reduced for one year from that month. Can not.
There is also a form in which contract power is determined by discussion with the power company. In this case, if the demand value exceeds the contracted power, it is necessary to pay an extra penalty than usual.
That is, regardless of the power reception contract with the power company, if the demand value exceeds the contract power, the power cost will increase.

  Therefore, when such an engine system is used in an engine power generation system, when the engine system should be started so that the demand value does not exceed the contracted power, if the engine main body is not started due to a start-up congestion trouble, Is not activated and the demand value exceeds the contract power, it is particularly desired to suppress the occurrence of a start-up congestion trouble.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an engine system that can sufficiently suppress the occurrence of a start-up congestion trouble, and to accurately execute demand monitoring control with the engine system. It is to provide an engine power generation system.

In order to achieve the above object, an engine system according to the present invention includes a coolant circulation path configured in a closed loop by an internal coolant flow path passing through the engine body and an external coolant flow path outside the engine body,
An engine-driven coolant pump that obtains driving force from the engine body and circulates coolant through the coolant circulation path;
An electric coolant pump for circulating the coolant through the coolant circulation path;
An electric heater for the coolant that heats the coolant flowing through the external coolant channel;
A lubricating oil circulation path configured in a closed loop by an internal lubricating oil flow path passing through the engine body and an external lubricating oil flow path outside the engine body;
An engine-driven lubricating oil pump that obtains driving force from the engine body and circulates lubricating oil through the lubricating oil circulation path;
An electric lubricating oil pump for circulating lubricating oil through the lubricating oil circulation path;
An electric heater for lubricating oil for heating the lubricating liquid flowing through the external lubricating oil flow path;
An engine system provided with an operation control means for controlling operation, the characteristic configuration of which is
When the operation control means satisfies a predetermined heating start condition while the engine main body is stopped and the engine is stopped, the electric coolant pump, the electric heater for coolant, the electric lubricant pump, and the lubrication It is in the point comprised so that the process for starting all the electric heaters for oil may be performed.

  According to the above characteristic configuration, when the heating start condition is satisfied while the engine is stopped, a process for starting all of the electric coolant pump, the coolant electric heater, the electric lubricant pump, and the lubricant electric heater ( Hereinafter, it may be described as a heating start process), so that any one of the electric heater for cooling liquid, the electric cooling liquid pump, the electric heater for lubricating oil, and the electric lubricating oil pump has failed. Both the coolant in the internal coolant channel and the lubricant in the internal lubricant channel are started by heat radiation and heat conduction between the internal coolant channel and the internal lubricant channel in the engine body. It becomes possible to raise the temperature to a temperature at which congestion troubles can be sufficiently suppressed.

  For example, if the electric heater for lubricating oil is out of order and the action of heating the lubricating oil flowing through the external lubricating oil passage is not exhibited by the electric heater for lubricating oil, The coolant heated by the heater circulates through the coolant circulation path and flows through the internal coolant passage, so that internal lubrication is achieved by heat radiation and heat conduction from the internal coolant passage in the engine body. Since the lubricating oil flowing through the oil flow path is heated, the temperature of the lubricating oil circulating in the lubricating oil circulation path rises.

  In addition, when the coolant heater is out of order and the coolant heater does not function to heat the coolant flowing through the external coolant flow path, it is heated by the lubricating oil heater. As the warm lubricating oil circulates in the lubricating oil circulation path and flows through the internal lubricating oil flow path, the internal coolant flow path passes through the internal lubricating oil flow path in the engine body due to heat radiation and heat conduction from the internal lubricating oil flow path. Since the flowing coolant is heated, the temperature of the coolant circulating in the coolant circulation path rises.

  In addition, if the electric lubricating oil pump is broken and the lubricating oil is not circulating in the lubricating oil circulation path, the coolant heated by the cooling liquid heater is circulated through the cooling liquid circulation path By flowing through the coolant channel, the lubricating oil remaining in the internal lubricant channel is heated by heat radiation and heat conduction from the internal coolant channel in the engine body.

Also, if the electric coolant pump is broken and the coolant is not circulating in the coolant circulation path, the lubricating oil heated up by heating with the lubricating oil heater circulates in the lubricant circulation path By flowing through the lubricating oil flow path, the cooling liquid remaining in the internal cooling liquid flow path is heated by heat radiation and heat conduction from the internal lubricating oil flow path in the engine body.
That is, even if any one of the electric heater for cooling liquid, the electric cooling liquid pump, the electric heater for lubricating oil, and the electric lubricating oil pump is out of order, both the cooling liquid and the lubricating oil are The temperature can be raised to a temperature at which the start-up congestion trouble can be avoided or a temperature close thereto.
Therefore, even when any one of the electric heater for coolant, the electric coolant pump, the electric heater for lubricating oil, and the electric lubricating oil pump fails, an engine system that can sufficiently suppress the occurrence of a start-up congestion trouble Can be provided.

A further characteristic configuration of the engine system according to the present invention is a coolant temperature detecting means for detecting a coolant temperature upstream of the coolant electric heater in the external coolant flow path,
Lubricating oil temperature detecting means for detecting the temperature of the lubricating oil is provided upstream of the lubricating oil electric heater in the external lubricating oil flow path,
The operation control means has a condition that the detected temperature of the coolant temperature detecting means is equal to or lower than a predetermined coolant heating start temperature, and the detected temperature of the lubricant temperature detecting means is equal to or lower than a predetermined lubricant heating start temperature. When at least one of the conditions is satisfied, the heating start condition is determined to be satisfied.

According to the above characteristic configuration, the temperature of the coolant upstream of the coolant electric heater in the external coolant flow path is equal to or lower than a predetermined coolant heating start temperature, or lubrication in the external lubricant flow path. When the temperature of the lubricating oil upstream of the oil electric heater becomes equal to or lower than a predetermined lubricating oil heating start temperature, a heating start process is executed.
By the way, the coolant heating start temperature is set as low as possible under conditions that can sufficiently suppress the start-up congestion trouble, and the lubricant heating start temperature is also sufficiently suppressed from causing the start-up congestion trouble. The temperature is set as low as possible.

That is, by determining the timing based on the coolant temperature or the lubricating oil temperature itself and executing the heating start process, for example, the timing is determined based on the elapsed time from the end of the previous heating start process. As compared with the case where the heating start process is executed, the heating start process can be executed at an appropriate timing without being too early and not too late.
By the way, if the timing to start the heating start process is too early, the temperature of the coolant and the lubricating oil are not lowered to a temperature that may cause a start-up congestion problem, but the heating start process is unnecessary. Will be executed, leading to waste of energy.
On the other hand, if the timing of starting the heating process is too late, the temperature of the coolant and the lubricating oil may be lowered to a temperature at which the start-up congestion trouble may occur, and the start-up congestion trouble can be sufficiently suppressed. I can't.
Therefore, it is possible to sufficiently suppress the occurrence of start-up congestion troubles while avoiding energy waste.

  According to a further characteristic configuration of the engine system according to the present invention, the operation control means has a condition that the detected temperature of the coolant temperature detecting means is equal to or higher than a predetermined coolant heating stop temperature higher than the coolant heating start temperature, And, when at least one of the conditions where the detected temperature of the lubricating oil temperature detecting means is equal to or higher than a predetermined lubricating oil heating stop temperature higher than the lubricating oil heating start temperature is satisfied, the heating stop condition is satisfied, The electric cooling liquid pump, the electric heater for cooling liquid, the electric lubricating oil pump and the electric heater for lubricating oil are all configured to execute processing.

According to the above characteristic configuration, the temperature of the coolant upstream of the coolant electric heater in the external coolant channel is equal to or higher than the predetermined coolant heating stop temperature, or lubrication in the external lubricant channel is performed. When the temperature of the lubricating oil upstream of the oil electric heater becomes equal to or higher than a predetermined lubricating oil heating stop temperature, all of the electric coolant pump, the electric heater for cooling liquid, the electric oil pump, and the electric heater for lubricating oil are A process for stopping (hereinafter, sometimes referred to as a heating stop process) is executed.
Incidentally, the coolant heating stop temperature is, for example, the internal cooling until the coolant is heated to the coolant heating stop temperature even when either the lubricating oil heater or the electric lubricant pump fails. The temperature of the lubricating oil in the internal lubricating oil flow path is set to a temperature at which the lubricating oil in the internal lubricating oil flow path can be heated to a temperature that can sufficiently avoid the start-up traffic jam trouble by heat radiation and heat conduction from the liquid flow path.
In addition, the lubricating oil heating stop temperature is, for example, the internal lubrication until the lubricating oil is heated to the lubricating oil heating stop temperature even when one of the coolant heater and the electric coolant pump fails. Due to the heat radiation and heat conduction from the oil flow path, the coolant in the internal coolant flow path is set to a temperature at which it can be heated to a temperature that can sufficiently avoid the start-up congestion trouble.
Therefore, even when any one of the coolant electric heater, the electric coolant pump, the lubricating oil heater, and the electric lubricant pump is out of order, the occurrence of the start-up congestion trouble can be further suppressed.

A further characteristic configuration of the engine system according to the present invention is that the external coolant channel for operation is provided with the engine-driven coolant pump as the external coolant channel, the electric coolant pump and the coolant. And an external coolant channel for stopping when the electric heater is provided are connected in parallel to the internal coolant channel,
As the cooling liquid circulation path, an operating cooling liquid circulation path composed of the internal cooling liquid path and the operating external cooling liquid path, and the internal cooling liquid path and the stop external cooling liquid A cooling fluid circulation path for stopping that includes a flow path is provided,
The external lubricating oil passage for operation provided with the engine-driven lubricating oil pump as the external lubricating oil passage, and the external lubricating oil for stop provided with the electric lubricating oil pump and the electric heater for lubricating oil A flow path is provided in a state connected in parallel to the internal lubricating oil flow path,
As the lubricating oil circulation path, an operating lubricating oil circulation path comprising the internal lubricating oil flow path and the operating external lubricating oil flow path, and the internal lubricating oil flow path and the stopping external lubricating oil There is a point that a lubricating oil circulation path for stopping which includes a flow path is provided.

According to the above-described characteristic configuration, during operation of the engine main body, the driving force is obtained from the engine main body, the engine driving coolant pump and the engine driving lubricant pump are operated, and the coolant circulation for operation is performed. The coolant circulates through the passage, and the lubricating oil circulates through the operating lubricating oil circulation passage.
On the other hand, when the heating start condition is satisfied while the engine is stopped, the heating start process is executed, and the electric coolant pump and the electric lubricant pump are operated, and the electric heater for the coolant and the electric heater for the lubricant are operated. The coolant is circulated through the stop-time coolant circulation path while being heated by the coolant-use electric heater, and the lubricant is circulated through the stop-time lubricant circulation path while being heated by the lubricant-use electric heater. .
That is, the pressure loss when circulating the coolant can be reduced as compared with the case where both the engine-driven coolant pump and the electric coolant pump are provided in the coolant circulation path of one system. Compared with the case where both the engine-driven lubricating oil pump and the electric lubricating oil pump are provided in the lubricating oil circulation path, the pressure loss when circulating the lubricating oil can be reduced.
Then, it becomes possible to reduce power consumption when operating the electric coolant pump and the electric lubricant pump while the engine is stopped.
Therefore, it is possible to sufficiently suppress the occurrence of start-up congestion troubles while saving energy.

The engine power generation system according to the present invention is an engine power generation system including a generator that is driven by the engine system described so far and supplies generated power to a system in a supply area.
A power receiving point that connects the system in the supply area to a commercial power system, an inverter that interconnects the power generation output of the generator to the commercial power system, and a power receiving that measures received power from the commercial power system at the power receiving point A wattmeter,
The operation control means is configured to start the engine system based on measurement information of the power receiving wattmeter so that a demand value does not exceed contract power.

According to the above characteristic configuration, when the engine is stopped, even when any one of the coolant electric heater, the electric coolant pump, the lubricant electric heater, and the motor lubricant pump fails, the coolant and All of the lubricating oils are heated to a temperature at which the trouble of starting congestion can be avoided or a temperature close thereto.
Therefore, when it is time to start the engine system so that the demand value does not exceed the contract power, the engine body can be started properly and the generator can be started properly accordingly. Can operate the generator so that it does not exceed the contract power.
Therefore, it is possible to provide an engine power generation system that can accurately execute demand monitoring control.

The block diagram which shows the whole structure of the engine electric power generation system provided with the engine system, and the figure which shows the operating state during engine operation The figure which shows the operating state in the engine stop of the engine electric power generation system provided with the engine system

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a block diagram of the overall configuration of an engine power generation system including an engine system E.
As shown in FIG. 1, the engine power generation system includes an engine system E, and a generator 32 that is driven by the engine system E and supplies generated power to the supply area system 31.

  First, the engine system E will be described. The engine system E includes a gas engine main body 21 (an example of an engine main body) that uses gas fuel as fuel, an internal coolant flow path 2 that passes through the gas engine main body 21, and the gas engine main body 21. Gear type that obtains driving force from the coolant circulation path 1 and the gas engine main body 21 configured in a closed loop by the external coolant flow path 3 outside and circulates the coolant (for example, coolant) through the coolant circulation path 1. Coolant pump 4 (an example of an engine-driven coolant pump), an electric coolant pump 5 that circulates the coolant through the coolant circulation path 1, and an electricity for coolant that heats the coolant flowing through the external coolant path 3 Lubricating oil circulation formed in a closed loop by the internal lubricating oil flow path 12 passing through the heater 6 and the gas engine main body 21 and the external lubricating oil flow path 13 outside the gas engine main body 21 11. A gear-type lubricating oil pump 14 (an example of an engine-driven lubricating oil pump) that obtains driving force from the gas engine main body 21 and circulates the lubricating oil through the lubricating oil circulation path 11, and circulates the lubricating oil through the lubricating oil circulation path 11. An electric lubricating oil pump 15 to be driven, an electric heater 16 for lubricating oil that heats the lubricating liquid flowing through the external lubricating oil flow path 13, and an operation control unit 22 (an example of operation control means) that controls the operation. It is configured.

The configurations of the gas engine main body 21, the coolant circulation system that circulates the coolant using the coolant circulation path 1, and the lubricating oil circulation system that circulates the lubricant oil using the lubricant oil circulation path 11 are well known. Therefore, a detailed description and illustration will be omitted, and a brief description will be given.
The internal coolant flow path 2 in the gas engine main body 21 is configured to flow the coolant through an engine jacket or the like, and the external coolant flow path 3 is configured to flow the coolant through a radiator or the like. The That is, the coolant circulation system is configured to circulate the coolant through the coolant circulation path 1 via the engine jacket and the radiator by the gear-type coolant pump 4 and the electric coolant pump 5.

  The internal lubricating oil flow path 12 in the gas engine main body 21 is configured to flow lubricating oil through a sliding portion such as a crankshaft, and the external lubricating oil flow path 13 flows through the oil filter or the like. Configured to let In other words, the lubricating oil circulation system uses the gear-type lubricating oil pump 14 or the electric lubricating oil pump 15 to feed the lubricating oil through the lubricating oil circulation path 11 via the sliding portion in the gas engine main body 21 and the oil filter. It is comprised so that it may flow through.

  The gear-type coolant pump 4 and the gear-type lubricating oil pump 14 are connected to the gas engine main body 21 by gears so as to be rotationally driven by the rotational power of the gas engine main body 21.

In this embodiment, as the external coolant flow path 3, an operating external coolant flow path 3r provided with a gear-type coolant pump 4, an electric coolant pump 5 and an electric heater 6 for coolant are provided. The external coolant channel 3s for stop is provided in a state of being connected in parallel to the internal coolant channel 2.
Then, as the coolant circulation path 1, the operation coolant circulation path 1 r composed of the internal coolant flow path 2 and the operation external coolant flow path 3 r, and the internal coolant flow path 2 and the stop external time Two systems of a cooling-liquid circulation path 1s at the time of stop consisting of the cooling liquid flow path 3s are provided.

In other words, the external coolant channel 3r for operation and the external coolant channel 3s for stop are the upstream common coolant channel portion 7 connected to the outflow side end of the internal coolant channel 2. And, it is connected in parallel to the internal coolant channel 2 via the downstream common coolant channel part 8 connected to the inflow side end of the internal coolant channel 2.
In other words, the external coolant flow path 3r for operation is composed of the upstream common coolant flow path portion 7, the dedicated coolant flow path portion 9 for operation, and the downstream common coolant flow path portion 8. The cooling liquid flow path 3s includes an upstream side common cooling liquid flow path part 7, a stop-time dedicated cooling liquid flow path part 10, and a downstream side common cooling liquid flow path part 8.

  The gear-type coolant pump 4 is provided in a state in which the gear-type coolant pump 4 is sucked to the upstream common coolant channel portion 7 side in the operation-specific coolant channel portion 9 of the operation-time external coolant channel 3r. The electric coolant pump 5 is provided in the state in which the external coolant channel 3s for stopping is provided in the state of the dedicated cooling fluid channel portion 10 at the time of stopping in the state of suction to the upstream common coolant channel portion 7 side, The liquid electric heater 6 is also provided in the cooling liquid flow path portion 10 dedicated to the stop.

A coolant three-way valve 23 that can be switched between a state in which the coolant is circulated through the operation-time coolant circulation path 1r and a state in which the coolant is circulated through the stop-time coolant circulation path 1s is an upstream-side common coolant channel portion. 7 and a dedicated coolant channel portion 9 during operation and a dedicated coolant channel portion 10 during stop.
In addition, a coolant temperature sensor 24 (an example of coolant temperature detection means) is commonly used upstream to detect the coolant temperature upstream of the coolant heater 6 in the external coolant channel 3. It is provided in the coolant flow path portion 7.

Further, as the external lubricating oil flow path 13, an operating external lubricating oil flow path 13 r provided with a gear-type lubricating oil pump 14, and a stopping time provided with an electric lubricating oil pump 15 and a lubricating oil electric heater 16 are provided. An external lubricating oil flow path 13 s is provided in a state of being connected in parallel to the internal lubricating oil flow path 12.
As the lubricating oil circulation path 11, an operating lubricating oil circulation path 11r composed of an internal lubricating oil flow path 12 and an operating external lubricating oil flow path 13r, and the internal lubricating oil flow path 12 and the external for stopping are provided. There are provided two systems of a lubricating oil circulation path 11s for stopping, which is composed of a lubricating oil flow path 13s.

In other words, the external lubricating oil flow channel 13r for operation and the external lubricating oil flow channel 13s for stop are the upstream common lubricating oil flow channel portion 17 connected to the outflow side end of the internal lubricating oil flow channel 12. And, it is connected in parallel to the internal lubricating oil flow path 12 via the downstream common lubricating oil flow path portion 18 connected to the inflow side end of the internal lubricating oil flow path 12.
That is, the operating external lubricating oil passage 13r is composed of the upstream common lubricating oil passage portion 17, the operating dedicated lubricating oil passage portion 19 and the downstream common lubricating oil passage portion 18, The lubricating oil flow path 13s includes an upstream side common lubricating oil flow path part 17, a stop-time dedicated lubricating oil flow path part 20, and a downstream common lubricating oil flow path part 18.

  The gear-type lubricating oil pump 14 is provided in the operating dedicated lubricating oil flow channel portion 19 of the operating external lubricating oil flow channel 13r in a state in which the gear-type lubricating oil pump 14 acts on the upstream common lubricating oil flow channel portion 17 side. The electric lubricating oil pump 15 is provided in a state in which the electric lubricating oil pump 15 at the time of stopping of the external lubricating oil passage portion 13s for stopping is suctioned toward the upstream side common lubricating oil passage portion 17 for lubrication. The electric heater 16 for oil is also provided in the dedicated lubricating oil flow path portion 20 at the time of stopping.

A lubricating oil three-way valve 25 that can be switched between a state in which the lubricating oil is circulated through the operating lubricating oil circulation passage 11r and a state in which the lubricating oil is circulated through the stopping lubricating oil circulation passage 11s is provided on the upstream side common lubricating oil passage portion. 17, a dedicated lubricating oil flow path portion 19 for operation and a dedicated lubricating oil flow path portion 20 for stop are provided at connection points.
In addition, a lubricant temperature sensor 26 (an example of a coolant temperature detection means) is commonly used upstream to detect the lubricant temperature upstream of the lubricant heater 16 in the external lubricant passage 13. It is provided in the lubricating oil flow path portion 17.

Next, the engine power generation system will be described.
As shown in FIG. 1, the engine power generation system is driven by an engine system E, and a generator 32 that supplies generated power to a supply area system 31, and a power receiving point that connects the supply area system 31 to a commercial power system 33. 34, an inverter 35 that interconnects the power generation output of the generator 32 with the commercial power system 33, and a power reception meter 36 that measures the received power from the commercial power system 33 at the power receiving point 34. .
The operation control unit 22 is configured to control the operation of the entire engine power generation system including the engine system E.
A plurality of electrical loads 37 are connected to the supply area system 31 so that power can be supplied from the commercial power system 33 and the generator 32.

Next, based on FIG.1 and FIG.2, the control action of the operation control part 22 is demonstrated.
FIG. 1 shows an operating state during engine operation when the engine system E is operating, and FIG. 2 shows an operating state during engine stop when the engine system E is stopped. In each figure, the path through which the coolant and lubricating oil flow is indicated by a bold line, and the open ports of the coolant three-way valve 23 and the lubricant three-way valve 25 are indicated by black.

  The operation control unit 22 receives information detected by various sensors such as the coolant temperature sensor 24 and the lubricant temperature sensor 26, measurement information of the power receiving wattmeter 36, and an operation unit (not shown) provided with various switches. Command information and the like are input, and based on the input information, the gas engine main body 21, the electric coolant pump 5, the electric heater for coolant 6, the electric lubricant pump 15, the electric heater 16 for lubricant, and the three-way valve for coolant 23, the operation of the three-way valve 25 for lubricating oil, the inverter 35, and the like are controlled.

The operation control unit 22 performs so-called demand monitoring control that activates the engine system E and activates the generator 32 so that the demand value does not exceed the contract power based on the measurement information of the power receiving wattmeter 36. It is configured.
It should be noted that the demand monitoring control can employ various known methods, and will be described briefly here, omitting detailed description and illustration.
That is, in the demand monitoring control, the operation control unit 22 is a predetermined generator start condition for starting the generator 32 so that the demand value does not exceed the contract power while the engine system E is stopped. Is satisfied, the predetermined engine start-up process is executed to start the engine system E, thereby starting the generator 32 and stopping the generator 32 while the engine operating the engine system E is operating. When the predetermined generator stop condition is satisfied, the engine 32 is stopped by executing a predetermined engine stop process to stop the engine system E.

  In the present invention, when the predetermined heating start condition is satisfied while the engine is stopped, the operation control unit 22 performs the electric coolant pump 5, the electric heater for cooling liquid 6, the electric lubricating oil pump 15, and the electric oil for lubricating oil. A process for starting up all of the heaters 16 (hereinafter may be referred to as a heating start process) is executed.

The control operation of the engine system E in the operation control unit 22 will be described in detail.
When the generator starting condition is satisfied while the engine is stopped, the operation control unit 22 starts the engine system E in the demand monitoring control as described above, and as shown in FIG. 23 is closed and the port connected to the dedicated coolant flow path portion 10 at the time of stop is closed and the other ports are opened, and the flow direction for operation is switched. The operation is switched to the operation flow state for closing the connected port and opening the other port, and when the electric coolant pump 5 and the electric heater 6 for the coolant are operating, they are stopped and the electric lubrication is performed. When the oil pump 15 and the lubricating oil electric heater 16 are operated, they are stopped.
Then, the operation control unit 22 maintains the coolant three-way valve 23 in the operating state during operation and maintains the electric coolant pump 5 and the coolant electric heater 6 in a stopped state while the engine is operating. In addition, the lubricating oil three-way valve 25 is maintained in the operating state and the stopped state of the electric lubricating oil pump 15 and the lubricating oil heater 16 is maintained.

  Then, during operation of the engine, the gear-type coolant pump 4 and the gear-type lubricant pump 14 are rotationally driven by the rotational power of the gas engine main body 21, so that the coolant is cooled for operation as shown in FIG. It circulates through the liquid circulation path 1r, and the lubricating oil circulates through the operating lubricating oil circulation path 11r.

  When the generator stop condition is satisfied while the engine is operating, the operation control unit 22 stops the engine system E in the demand monitoring control as described above, and, as shown in FIG. 23 is switched to a stop-time flow state that closes the port connected to the dedicated coolant flow path portion 9 during operation and opens the other ports, and the dedicated lubricant flow channel portion 19 for operation of the lubricating oil three-way valve 25 The connected port is closed and the other port is opened and switched to the stop-state flow state.

  Then, in the state where the operation of the electric coolant pump 5 and the electric lubricant pump 15 is stopped, the operation of the gear coolant pump 4 and the gear lubricant pump 14 is also stopped. The coolant is not circulated through any of the circulation path 1r and the stop time coolant circulation path 1s, and lubrication is performed through any of the operation time lubricant oil circulation path 11r and the stop time lubricant oil circulation path 11s. Oil is not circulated.

The operation control unit 22 monitors the detected temperature of the coolant temperature sensor 24 and the detected temperature of the lubricating oil temperature sensor 26 while the engine is stopped, and the detected temperature of the coolant temperature sensor 24 falls below a predetermined coolant heating start temperature. When at least one of the following conditions and the condition that the detected temperature of the lubricating oil temperature sensor 26 is equal to or lower than the predetermined lubricating oil heating start temperature is satisfied, it is determined that the heating start condition is satisfied.
And if the operation control part 22 judges that the heating start conditions were satisfy | filled, as mentioned above, a heating start process will be performed.

The operation control unit 22 monitors the detected temperature of the coolant temperature sensor 24 and the detected temperature of the lubricating oil temperature sensor 26 even after execution of the heating start process, and the detected temperature of the coolant temperature sensor 24 is higher than the coolant heating start temperature. And at least one of a condition that the detected temperature of the lubricant temperature sensor 26 is higher than a predetermined lubricant heating stop temperature higher than the lubricant heating start temperature is satisfied. And a process for stopping all of the electric coolant pump 5, the electric heater for cooling liquid 6, the electric lubricating oil pump 15, and the electric heater 16 for lubricating oil (hereinafter referred to as “heat stopping process”). ) Is configured to perform.
Incidentally, the coolant heating stop temperature is set to a temperature that is about 5 ° C. higher than the coolant heating start temperature, for example, and the lubricant heating stop temperature is also set to a temperature that is about 5 ° C. higher than the lubricant heating start temperature, for example. Is done.

  Then, the circulation of the coolant through the stop time coolant circulation path 1s is stopped, the heating of the coolant is stopped, and the circulation of the lubricant oil through the stop time lubricant oil circulation path 11s is stopped. The heating of the lubricating oil is also stopped.

  Thereafter, the operation control unit 22 monitors the detected temperature of the coolant temperature sensor 24 and the detected temperature of the lubricating oil temperature sensor 26 while the engine is stopped, and determines that the heating start condition is satisfied based on the detected information. Then, the heating start process is executed, and when it is determined that the heating stop condition is satisfied, the heating stop process is executed.

When the heating start processing is executed, when the electric coolant pump 5 and the electric lubricant pump 15 are normal, the electric coolant pump 5 and the electric lubricant pump 15 are operated, as shown in FIG. The liquid circulates through the stop-time coolant circulation path 1s, and the lubricating oil circulates through the stop-time lubricant oil circulation path 11s.
When the coolant electric heater 6 is normal, the coolant flowing through the stop-time dedicated coolant flow path portion 10 in the stop-time coolant circulation path 1s is heated by the coolant electric heater 6. The temperature of the coolant circulating through the stop-time coolant circulation path 1s rises.
When the lubricating oil electric heater 16 is normal, the lubricating oil electric heater 16 heats the lubricating oil flowing through the stopping dedicated lubricating oil passage portion 20 in the stopping lubricating oil circulation path 11s. Therefore, the temperature of the lubricating oil circulating through the stopping lubricating oil circulation path 11s rises.

  For example, when the lubricating oil electric heater 16 is out of order and the lubricating oil electric heater 16 does not exert the effect of heating the lubricating oil flowing through the dedicated lubricating oil flow passage portion 20 at the time of stoppage, The coolant heated by the electric heater 6 circulates in the stop-time coolant circulation path 1 s and flows through the internal coolant flow path 2, so that the internal coolant flow path 2 in the gas engine main body 21 is removed. Since the lubricating oil flowing through the internal lubricating oil flow path 12 is heated by the heat radiation and heat conduction, the temperature of the lubricating oil circulating in the stopping lubricating oil circulation path 11s rises.

  On the other hand, when the electric heater 6 for cooling liquid is out of order and the action of heating the cooling liquid flowing through the dedicated cooling liquid passage portion 10 at the time of stoppage is not exhibited by the electric heater 6 for cooling liquid, The lubricating oil whose temperature has been raised by heating by the electric heater 16 circulates in the stop-time lubricating oil circulation path 11 s and flows through the internal lubricating oil flow path 12, so that the internal lubricating oil flow path 12 in the gas engine main body 21 is removed. Since the coolant flowing through the internal coolant channel 2 is heated by the heat radiation and heat conduction, the temperature of the coolant circulating in the stop-time coolant circulating channel 1s rises.

  Further, when the electric lubricating oil pump 15 is out of order and the lubricating oil is not circulating in the stopping lubricating oil circulation path 11s, the coolant raised in temperature by the heating by the cooling liquid electric heater 6 is used for stopping. By circulating through the coolant circulation path 1 s and flowing through the internal coolant flow path 2, the internal lubricant flow path 12 is transferred to the internal lubricating oil flow path 12 by heat radiation and heat conduction from the internal coolant flow path 2 in the gas engine body 21. The remaining lubricating oil is heated.

  On the other hand, when the electric coolant pump 5 is out of order and the coolant is not circulating in the stop-time coolant circulation path 1s, the lubricant heated by the lubricant oil heater 16 is heated. By circulating through the lubricating oil circulation path 11 s and flowing through the internal lubricating oil flow path 12, the heat flow from the internal lubricating oil flow path 12 in the gas engine main body 21 and heat conduction to the internal coolant flow path 2. The remaining coolant is heated.

  Therefore, even if any one of the electric coolant pump 5, the coolant heater 6, the electric lubricant pump 15 and the lubricant heater 16 is out of order, the coolant and lubricant are not used while the engine is stopped. In any case, the temperature can be raised to a temperature at which the start traffic congestion trouble can be avoided or a temperature close thereto, and the occurrence of the start traffic trouble can be avoided. Can be activated.

[Another embodiment]
(A) In the above embodiment, the coolant circulation path 1 is provided by providing two systems of the external coolant flow path 3r for operation and the external coolant flow path 3s for stop as the external coolant flow path 3. As described above, two systems of the cooling liquid circulation path 1r for operation and the cooling liquid circulation path 1s for stop time are provided, but by providing one external cooling liquid flow path 3, one cooling liquid circulation path 1 is provided. May be.
In addition, by providing two systems of the external lubricating oil flow path 13r and the external lubricating oil flow path 13s for stop as the external lubricating oil flow path 13, the lubricating oil circulation path 11 serves as the lubricating oil for driving. Although two systems of the circulation path 11r and the stop-time lubricating oil circulation path 11s are provided, one system of the lubricating oil circulation path 11 may be provided by providing one system of the external lubricating oil flow path 13.

(B) The heating start condition is not limited to the conditions exemplified in the above embodiment. For example, after the gas engine body 1 is stopped, or the heating stop condition is satisfied, the heating stop process is executed. Thereafter, various conditions such as a condition for a predetermined time to elapse can be set.

(C) In the above embodiment, at least the condition that the detected temperature of the coolant temperature sensor 24 becomes equal to or higher than the coolant heating stop temperature and the condition that the detected temperature of the lubricant temperature sensor 26 becomes equal to or higher than the lubricant heating stop temperature. When one of the conditions is satisfied, the heating stop condition is satisfied. However, when both are satisfied, the heating stop condition may be satisfied.
In addition, the heating stop condition can be set to various conditions such as a condition that a predetermined time elapses after the heating start condition is satisfied and the heating start process is executed.

(D) As illustrated in the above embodiment, the engine body is not limited to the gas engine body 11 that uses gas fuel as fuel, but also uses gasoline as fuel or light oil as fuel. Can be applied.

(E) The present invention can be applied to various engine systems E such as an engine system E that drives a heat pump, in addition to the engine system E that drives the generator 32 exemplified in the above embodiment.

  Note that the configuration disclosed in the above embodiment (including another embodiment, the same applies hereinafter) can be applied in combination with the configuration disclosed in the other embodiment as long as no contradiction occurs. The embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

  As described above, it is possible to provide an engine system that can sufficiently suppress the occurrence of a start-up congestion trouble, and an engine power generation system that includes the engine system and can accurately execute demand monitoring control.

1 Coolant circulation path 1r Cooling liquid circulation path for operation 1s Cooling liquid circulation path for stoppage 2 Internal cooling liquid flow path 3 External cooling liquid flow path 3r External cooling liquid flow path for operation 3s External cooling liquid flow for stoppage Path 4 Gear-type coolant pump (engine-driven coolant pump)
5 Electric Coolant Pump 6 Coolant Electric Heater 11 Lubricating Oil Circulation Path 11r Operating Lubricating Oil Circulating Path 11s Stopping Lubricating Oil Circulating Path 12 Internal Lubricating Oil Flow Path 13 External Lubricating Oil Flow Path 13r Operating External Lubrication Oil flow passage 13s External lubricant flow passage for stopping 14 Gear-type lubricating oil pump (engine-driven lubricating oil pump)
15 Electric Lubricating Oil Pump 16 Electric Heater 21 for Lubricating Oil Gas Engine Body (Engine Body)
22 Operation control unit (operation control means)
24 Coolant temperature sensor (coolant temperature detection means)
26 Lubricating oil temperature sensor (lubricating oil temperature detecting means)
31 Supply area system 32 Generator 33 Commercial power system 34 Receiving point 35 Inverter 36 Receiving power meter E Engine system

Claims (5)

A coolant circulation path configured in a closed loop by an internal coolant flow path passing through the engine body and an external coolant flow path outside the engine body;
An engine-driven coolant pump that obtains driving force from the engine body and circulates coolant through the coolant circulation path;
An electric coolant pump for circulating the coolant through the coolant circulation path;
An electric heater for the coolant that heats the coolant flowing through the external coolant channel;
A lubricating oil circulation path configured in a closed loop by an internal lubricating oil flow path passing through the engine body and an external lubricating oil flow path outside the engine body;
An engine-driven lubricating oil pump that obtains driving force from the engine body and circulates lubricating oil through the lubricating oil circulation path;
An electric lubricating oil pump for circulating lubricating oil through the lubricating oil circulation path;
An electric heater for lubricating oil for heating the lubricating liquid flowing through the external lubricating oil flow path;
An engine system provided with operation control means for controlling operation,
When the operation control means satisfies a predetermined heating start condition while the engine main body is stopped and the engine is stopped, the electric coolant pump, the electric heater for coolant, the electric lubricant pump, and the lubrication An engine system configured to execute a process for starting up all of the oil electric heater. A coolant temperature detecting means for detecting the temperature of the coolant on the upstream side of the electrical heater for coolant in the external coolant flow path;
Lubricating oil temperature detecting means for detecting the temperature of the lubricating oil is provided upstream of the lubricating oil electric heater in the external lubricating oil flow path,
The operation control means has a condition that the detected temperature of the coolant temperature detecting means is equal to or lower than a predetermined coolant heating start temperature, and the detected temperature of the lubricant temperature detecting means is equal to or lower than a predetermined lubricant heating start temperature. The engine system according to claim 1, wherein the engine system is configured to determine that the heating start condition is satisfied when at least one of the conditions is satisfied.   The operation control means has a condition that the detected temperature of the coolant temperature detecting means is equal to or higher than a predetermined coolant heating stop temperature higher than the coolant heating start temperature, and the detected temperature of the lubricating oil temperature detecting means is the When at least one of the conditions that is higher than the predetermined lubricant heating stop temperature higher than the lubricant heating start temperature is satisfied, the heating coolant condition is satisfied, and the electric coolant pump, the coolant electric heater, The engine system according to claim 2, wherein the engine system is configured to execute processing for stopping all of the electric lubricant pump and the lubricant electric heater. As the external coolant channel, an external coolant channel for operation provided with the engine-driven coolant pump, and an external coolant for stop provided with the electric coolant pump and the electric heater for coolant A flow path is provided in a state connected in parallel to the internal coolant flow path,
As the cooling liquid circulation path, an operating cooling liquid circulation path composed of the internal cooling liquid path and the operating external cooling liquid path, and the internal cooling liquid path and the stop external cooling liquid A cooling fluid circulation path for stopping that includes a flow path is provided,
The external lubricating oil passage for operation provided with the engine-driven lubricating oil pump as the external lubricating oil passage, and the external lubricating oil for stop provided with the electric lubricating oil pump and the electric heater for lubricating oil A flow path is provided in a state connected in parallel to the internal lubricating oil flow path,
As the lubricating oil circulation path, an operating lubricating oil circulation path comprising the internal lubricating oil flow path and the operating external lubricating oil flow path, and the internal lubricating oil flow path and the stopping external lubricating oil The engine system according to any one of Claims 1 to 3, wherein a lubricating oil circulation path for stopping that includes a flow path is provided. An engine power generation system comprising a generator driven by the engine system according to any one of claims 1 to 4 to supply generated power to a system in a supply area,
A power receiving point that connects the system in the supply area to a commercial power system, an inverter that interconnects the power generation output of the generator to the commercial power system, and a power receiving that measures received power from the commercial power system at the power receiving point A wattmeter,
An engine power generation system in which the operation control unit is configured to start the engine system based on measurement information of the power reception power meter so that a demand value does not exceed contract power.

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