Gas engine power generation system

Patent metadata

Field	Value
Publication number	US-11428194-B2
Application number	US-202017028091-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Sep 27, 2019
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

The present disclosure relates to a gas engine power generation system, having an engine configured to generate mechanical energy by burning an air-fuel mixture supplied from a mixer, which mixes air filtered by passing through an air cleaner, and fuel of a predetermined pressure which has passed through a zero governor, in which the gas engine power generation system converts the mechanical energy of the engine into electrical energy. The gas engine power generation system according to an embodiment of the present disclosure includes: an intake path having a first intake passage and a second intake passage in which air to be supplied to the mixer flows; an intake passage controller configured to open either one of the first intake passage or the second intake passage and to close the other one; a coolant pump configured to supply coolant to the engine; a radiator configured to dissipate heat of the coolant having passed through the engine; an intake air heater provided in the intake path at a portion where the second intake passage is formed, and configured to dissipate heat of the coolant having passed through the engine; a coolant passage controller configured to distribute the coolant, having passed through the engine, to the coolant pump, the radiator, and the intake air heater; and a controller configured to control operations of the intake passage controller, the coolant passage controller, and the coolant pump based on temperature of the coolant, having passed through the engine, and load information of the engine.

First claim

What is claimed is:

1. A gas engine power generation system having an engine configured to burn an air-fuel mixture supplied from a mixer, which mixes air and fuel, the gas engine power generation system comprising:
an intake path having a first intake passage and a second intake passage in which air to be supplied to the mixer flows;
an intake passage controller configured to open either one of the first intake passage or the second intake passage and to close the other one;
a coolant pump configured to supply coolant to the engine;
a radiator configured to dissipate heat of the coolant having passed through the engine;
an intake air heater provided in the intake path at a portion where the second intake passage is formed, and configured to dissipate heat of the coolant having passed through the engine;
a coolant passage controller configured to distribute the coolant, having passed through the engine, to the coolant pump, the radiator, and the intake air heater; and
a controller configured to control operations of the intake passage controller, the coolant passage controller, and the coolant pump based on temperature of the coolant, having passed through the engine, and load information of the engine,
wherein when the engine starts, the controller controls the intake passage controller to open the first intake passage and to close the second intake passage.

2. The gas engine power generation system of claim 1 , further comprising:
a temperature sensor configured to sense the temperature of the coolant, having passed through the engine, and to transmit the sensed temperature to the controller;
a circulation channel forming a closed loop by sequentially passing through the coolant pump, the engine, and the coolant passage controller; and
a heat dissipation channel having
a first heat dissipation channel, forming a closed loop by sequentially passing through the coolant pump, the engine, the coolant passage controller, and the radiator, and
a second heat dissipation channel forming a closed loop by sequentially passing through the coolant pump, the engine, the coolant passage controller, and the intake air heater,

wherein the coolant passage controller opens and closes each of the circulation channel and the heat dissipation channel.

3. The gas engine power generation system of claim 2 , wherein when the engine starts, the controller:
controls the coolant passage controller to open the circulation channel and to close the heat dissipation channel; and
controls the coolant pump to circulate the coolant through the circulation channel.

4. The gas engine power generation system of claim 3 , wherein in response to the temperature of the coolant, having passed through the engine, being greater than or equal to a reference temperature, the controller:
controls the coolant passage controller to open the circulation channel and the heat dissipation channel; and
controls the coolant pump to circulate the coolant through the circulation channel and the heat dissipation channel.

5. The gas engine power generation system of claim 3 , further comprising a pressure sensor disposed at an intake manifold of the engine, and configured to sense pressure of the air-fuel mixture flowing through the intake manifold and to transmit the sensed pressure to the controller,
wherein in response to the pressure of the mixture flowing through the intake manifold being lower than or equal to a reference pressure, the controller determines that the load of the engine is a partial load, and in response to the pressure of the mixture exceeding the reference pressure, the controller determines that the load of the engine is a maximum load.

6. The gas engine power generation system of claim 5 , wherein in a case where the temperature of the coolant, having passed through the engine, is greater than or equal to the reference temperature, in response to the load of the engine being the partial load, and no knocking of the engine being detected, the controller:
controls the intake passage controller to close the first intake passage and to open the second intake passage;
controls the coolant passage controller to open the circulation channel and the heat dissipation channel; and
controls the coolant pump to circulate the coolant through the circulation channel and the heat dissipation channel.

7. The gas engine power generation system of claim 6 , wherein in a case where the temperature of the coolant, having passed through the engine, is greater than or equal to the reference temperature, in response to the load of the engine being the maximum load, the controller:
controls the intake passage controller to open the first intake passage and to close the second intake passage;
controls the coolant passage controller to open the circulation channel and the heat dissipation channel; and
controls the coolant pump to circulate the coolant through the circulation channel and the heat dissipation channel.

8. The gas engine power generation system of claim 6 , wherein in a case where the temperature of the coolant, having passed through the engine, is greater than or equal to the reference temperature, in response to the knocking of the engine being detected, the controller:
controls the intake passage controller to open the first intake passage and to close the second intake passage;
controls the coolant passage controller to open the circulation channel and the heat dissipation channel; and
controls the coolant pump to circulate the coolant through the circulation channel and the heat dissipation channel.

9. The gas engine power generation system of claim 4 , wherein in response to the temperature of the coolant, having passed through the engine, being greater than or equal to a threshold temperature which is higher than the reference temperature, the controller controls the coolant pump to increase a flow rate of the coolant circulating through the heat dissipation channel.

10. The gas engine power generation system of claim 1 , wherein the intake path is disposed between an air cleaner and the mixer, and wherein the air cleaner provides air to the mixer.

11. The gas engine power generation system of claim 1 , wherein each of the intake passage controller and the coolant passage controller includes a valve or a damper.

12. The gas engine power generation system of claim 11 , wherein the intake passage controller includes the damper, and the damper is rotatable between an inlet of the first intake passage and an inlet of the second intake passage, and closes the inlet of the first intake passage or the inlet of the second intake passage.

13. The gas engine power generation system of claim 1 , wherein when the engine starts, the controller controls the coolant passage controller to provide the coolant having passed through the engine to the coolant pump rather than the radiator and the intake air heater.

14. The gas engine power generation system of claim 1 , wherein the engine is configured to generate mechanical energy by burning the air-fuel mixture,
wherein the gas engine power generation system is configured to convert the mechanical energy of the engine into electrical energy.

Assignees

• Lg Electronics Inc

Inventors

• Song Jingeun
• Choi Song

Classifications

• F01P2025/62

  Load · CPC title

• F02B43/04

  for improving efficiency of combustion · CPC title

• F01P7/167 Primary

  by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed · CPC title

• F01P3/12 Primary

  Arrangements for cooling other engine or machine parts · CPC title

• F01P2025/08

  Temperature · CPC title