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Large internal combustion engine with supercharger

一种内燃发动机、大型的技术，应用在内燃活塞发动机、燃烧发动机、发动机元件等方向，能够解决发动机损坏等问题

Inactive Publication Date: 2008-01-30
MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavily polluted exhaust gases cannot simply be recirculated since damage to sensitive engine parts would occur

Method used

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  • Large internal combustion engine with supercharger
  • Large internal combustion engine with supercharger
  • Large internal combustion engine with supercharger

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0052] The following example describes the mode of operation of a scrubber in an engine plant, where the recirculation gas is purified and humidified in a humidification unit 29 and all charge air is humidified in a two-stage humidification unit 12 . The operating state of the engine can be selected so that the maximum amount of energy is shunted from the exhaust flow. For simplicity, the calculation is based on the engine at full load, the input power is 25,000KW and the nominal pressure of the charge air is 360Kpa.

[0053] The engine is running at 100% load, the ambient air temperature is 25°C and the relative humidity is 30%, which means that the intake air will contain about 6g water / kg air. The air consumption of the engine is about 55kg / s. After passing through the compressor 9, the temperature of the air is T1=190° C., and the relative humidity is 0.25%.

[0054] In the first humidification section 13, water is supplied at a flow rate of 13 l / s to the atomizer nozzles...

example 2

[0059] This example shows the possibility of selecting the operating state of the engine in case of low thermal load on the engine. Under the same ambient conditions and engine load as above, the atomizer nozzles in the first flushing section 12 are supplied with seawater at a temperature of 30°C and a flow rate of at least 20 l / s, thus altering the charge air by evaporation The temperature is about T1=75°C, the humidity is about 90% relative temperature, and the absolute humidity is about 65g / kg.

[0060] In the second flushing section 13, water is supplied with a temperature of about 30° C. and a flow rate of 60 l / s. This cools the charge air to a temperature of about 37°C and an absolute humidity of the air at 100% saturated gas of about 11 g / kg.

[0061] Thus, a low thermal load setting of the engine can be achieved, for example, when a thermal overload signal of the engine is present.

example 3

[0063] This example shows the possibility of selecting the operating state of the engine when the engine has a medium heat load. Under the same ambient conditions and engine load as above, the sprayer nozzles in the first scourer section 12 are supplied with seawater at a temperature of 50° C. and a flow rate of about 13 l / s. This changes the temperature of the charge air to approximately 75°C, while the charge air is humidified to approximately 80% relative humidity. The absolute temperature thus reaches a level of approximately 59 g / kg.

[0064] In the second flusher section 13, water is supplied with a temperature of about 76° C. and a flow rate of 50 l / s. This changes the temperature of the charge air to about 75°C and the absolute humidity of the air at 100% saturated gas is about 76g / kg.

[0065] Thus, a moderate thermal load setting of the engine can be achieved, the engine can be operated with reduced NOx emissions and with less energy diverted from the exhaust flow ...

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Abstract

The large internal combustion engine with a super charger comprises a turbocharger having a turbine (6) driven by an exhaust gas, and a compressor (9) driven by the turbine for supplying supply air to a cylinder of the engine. The engine is further provided with a humidification unit (12) for raising an absolute humidity of the supply air by humidifying the supply air.

Description

[0001] The present invention is a divisional application of Chinese patent application 03136910.3 entitled "Large Supercharged Internal Combustion Engine" filed on May 21, 2003. technical field [0002] The present invention relates to a large supercharged internal combustion engine, such as the main engine on a ship, comprising a turbocharger with an exhaust gas driven turbine and a compressor driven by the turbine and supplying boost air to the engine cylinders. The engine also includes a cooling unit that cools the charged gas through the injection of water. Background technique [0003] World patent WO-9 429 579, for example, discloses a large supercharged two-stroke internal combustion engine with a compressor delivering charge air and purified air to the engine cylinders, and a cooler for cooling the air from the compressor . The cooler operates by atomizing the water pressure in the air. The cooler comprises a plurality of consecutive sprayer sections, and a droplet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M31/20F02M25/025F02M35/10F02B37/00F01N3/02F01N3/24F01N13/00F01N99/00F01P9/00F02B29/04F02B37/02F02B37/04F02B39/02F02B41/10F02G5/02
CPCY02T10/146Y02T10/166Y02T10/163Y02T10/121Y02T10/144Y02T10/16Y02T10/12F02B29/04
Inventor 彼得·伯格-桑尼
Owner MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND
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