Intake air cooling apparatus for stationary internal combustion engine

Patent metadata

Field	Value
Publication number	US-9316185-B2
Application number	US-201214007007-A
Country	US
Kind code	B2
Filing date	Mar 8, 2012
Priority date	Mar 31, 2011
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A water-saving intake air cooling apparatus for a stationary internal combustion engine includes a primary intake air cooler, a high temperature side intake air cooler, and a low temperature side intake air cooler in an intake air passage upstream and downstream of a turbo charger. A first radiator transfers cooling water to an absorption chiller. The absorption chiller transfers cooling water to the primary intake air cooler and to the low temperature side intake air cooler. A second radiator transfers cooling water to the high temperature side intake air cooler. A third radiator cools lubricating oil flowing through a lubricating oil circulation space. Steam is generated by an exhaust heat boiler provided in an exhaust gas passage, and the steam is supplied to the absorption chiller as a heat source. Such use of the first, second, and third radiators, reduces the need for cooling water.

First claim

The invention claimed is:

1. An intake air cooling apparatus for a stationary internal combustion engine in which a turbo charger is provided in an intake air passage and an exhaust gas passage, comprising:
a first intake air cooler provided in the intake air passage on an upstream side of a compressor forming the turbo charger in order to perform primary cooling on intake air;
a second intake air cooler for performing secondary cooling on the intake air on an outlet side of the compressor after the intake air is compressed and heated by the compressor;
an absorption chiller that uses heat possessed by exhaust gas from the stationary internal combustion engine as a heat source and supplies cooling water for cooling the intake air to the first intake air cooler and the second intake air cooler; and
a heat exchanger that cools cooling water by performing heat exchange between the cooling water and outside air and supplies the cooling water to the absorption chiller as a cold source,
wherein intake air supplied to a combustion chamber of the stationary internal combustion engine is cooled by the first intake air cooler and the second intake air cooler.

2. The intake air cooling apparatus for a stationary internal combustion engine according to claim 1 , wherein the second intake air cooler is constituted by a high temperature side intake air cooler that cools the high temperature intake air compressed by the turbo charger, and a low temperature side intake air cooler that further cools the intake air cooled by the high temperature side intake air cooler and then supplies the cooled intake air to a cylinder,
a second heat exchanger is provided to supply cooling water that has been cooled by exchanging heat with outside air, to the high temperature side intake air cooler, and
cooling water is supplied to the low temperature side intake air cooler from the absorption chiller, while the cooling water used for intake air cooling in the high temperature side intake air cooler is returned to the second heat exchanger through a cooling water jacket of the stationary internal combustion engine.

3. The intake air cooling apparatus for a stationary internal combustion engine according to claim 2 , further comprising:
an exhaust gas boiler provided in the exhaust gas passage of the stationary internal combustion engine; and
a steam supply passage that supplies at least a part of steam obtained in the exhaust gas boiler to the absorption chiller,
wherein the steam is supplied as a heat source of the absorption chiller.

4. The intake air cooling apparatus for a stationary internal combustion engine according to claim 2 , further comprising:
a cooling water circulation passage that circulates the cooling water between the absorption chiller and either the second intake air cooler or the low temperature side intake air cooler;
a bypass passage that is connected between an outward passage and a return passage of the cooling water circulation passage in order to return the cooling water that has been subjected to heat exchange with the intake air compressed and heated by the turbo charger and has been discharged from the second intake air cooler or the low temperature side intake air cooler, to the second intake air cooler or the low temperature side intake air cooler without passing through the absorption chiller;
a valve mechanism capable of varying a flow rate of the cooling water flowing through the bypass passage; and
a controller that controls the valve mechanism such that a temperature of the cooling water supplied to the absorption chiller is controlled in accordance with a load of the stationary internal combustion engine.

5. The intake air cooling apparatus for a stationary internal combustion engine according to claim 2 , further comprising:
a temperature sensor that detects a temperature of the cooling water supplied from the absorption chiller to the second intake air cooler or the low temperature side intake air cooler; and
a controller that controls an operation of the absorption chiller such that a detection value of the temperature sensor reaches a target value.

6. The intake air cooling apparatus for a stationary internal combustion engine according to claim 2 , further comprising:
a third heat exchanger that performs heat exchange between the outside air and lubricating oil that circulates through a lubricating oil space formed in a housing of the stationary internal combustion engine in order to cool the lubricating oil; and
a lubricating oil circulation passage that communicates with the lubricating oil space in order to lead the lubricating oil to the third heat exchanger.

7. The intake air cooling apparatus for a stationary internal combustion engine according to claim 1 , further comprising:
an exhaust gas boiler provided in the exhaust gas passage of the stationary internal combustion engine; and
a steam supply passage that supplies at least a part of steam obtained in the exhaust gas boiler to the absorption chiller,
wherein the steam is supplied as a heat source of the absorption chiller.

8. The intake air cooling apparatus for a stationary internal combustion engine according to claim 1 , further comprising:
a cooling water circulation passage that circulates the cooling water between the absorption chiller and either the second intake air cooler or the low temperature side intake air cooler;
a bypass passage that is connected between an outward passage and a return passage of the cooling water circulation passage in order to return the cooling water that has been subjected to heat exchange with the intake air compressed and heated by the turbo charger and has been discharged from the second intake air cooler or the low temperature side intake air cooler, to the second intake air cooler or the low temperature side intake air cooler without passing through the absorption chiller;
a valve mechanism capable of varying a flow rate of the cooling water flowing through the bypass passage; and
a controller that controls the valve mechanism such that a temperature of the cooling water supplied to the absorption chiller is controlled in accordance with a load of the stationary internal combustion engine.

9. The intake air cooling apparatus for a stationary internal combustion engine according to claim 1 , further comprising:
a temperature sensor that detects a temperature of the cooling water supplied from the absorption chiller to the second intake air cooler or the low temperature side intake air cooler; and
a controller that controls an operation of the absorption chiller such that a detection value of the temperature sensor reaches a target value.

10. The intake air cooling apparatus for a stationary internal combustion engine according to claim 1 , further comprising:
a third heat exchanger that performs heat exchange between the outside air and lubricating oil that circulates through a lubricating oil space formed in a housing of the stationary internal combustion engine in order to cool the lubricating oil; and
a lubricating oil circulation passage that communicates with the lubricating oil space in order to lead the lubricating oil to the third heat exchanger.

Assignees

• Komiyama Masahito
• Fukushi Hiroshi
• Inoue Kiwamu
• Mitsubishi Heavy Ind Ltd

Inventors

• Komiyama Masahito
• Fukushi Hiroshi
• Inoue Kiwamu

Classifications

• F02B29/0443

  Layout of the coolant or refrigerant circuit · CPC title

• F02B29/0412

  Multiple heat exchangers arranged in parallel or in series · CPC title

• F01P9/06

  by use of refrigerating apparatus, e.g. of compressor or absorber type · CPC title

• Y02T10/146

  Cross-Sectional Technologies · mapped topic

• F01P2060/02

  Intercooler · CPC title