JP2009532614A5

JP2009532614A5 -

Info

Publication number: JP2009532614A5
Application number: JP2009503418A
Authority: JP
Filing date: 2006-04-12
Publication date: 2010-05-06
Anticipated expiration: 2026-04-12

Claims

A cylinder connected to the exhaust gas receiver via the manifold pipe so that the exhaust gas flows directly from the manifold pipe to the exhaust gas receiver;
An upstream exhaust gas conduit for directing the exhaust gas from the exhaust gas receiver to an inlet of a turbocharger turbine, wherein the upstream exhaust gas conduit is connected to the outlet of the exhaust gas receiver;
A downstream exhaust gas conduit for directing the exhaust gas from the turbine outlet of the turbocharger to the outside;
One or more exhaust gas boilers or heat exchangers for recovering thermal energy from the exhaust gas;
A crosshead type large two-cycle turbocharged diesel engine comprising: at least one of the boiler or the heat exchanger is disposed in the exhaust gas receiver. Turbocharged diesel engine.

A preheating boiler is further provided on the low pressure side of the turbocharger, and the boiler disposed in the exhaust gas receiver is used to superheat steam generated by the boiler on the low pressure side of the turbocharger. The engine according to claim 1.

The engine according to claim 1, further comprising a steam turbine driven by steam generated by the one or more boilers.

The engine of claim 3, wherein the power turbine drives a generator.

The engine according to any one of claims 1 to 4, wherein the exhaust gas receiver accommodates a plurality of boilers.

The engine of claim 5, wherein the plurality of boilers form a multi-stage steam superheated steam generation system comprising a preheat and superheat boiler.

The engine according to claim 1, wherein the exhaust gas receiver is divided in a longitudinal direction into an exhaust gas collection channel and a heat exchange channel.

The engine of claim 7, wherein the heat exchange channel has an annular cross-section within which an arcuate boiler portion is accommodated.

A turbocharger having an exhaust gas turbine connected to a charge air compressor;
A first exhaust gas boiler provided on the high pressure side of the turbocharger downstream of the cylinder;
A power turbine driven by a part of the exhaust gas branched from the high pressure side of the turbocharger;
And a crosshead large two-cycle turbocharged diesel engine that can be operated to generate a large amount of heat in the boiler instead of generating large rotational energy in the power turbine.

The engine according to claim 9, further comprising a second exhaust gas boiler on a low pressure side of the turbocharger.

11. The engine according to claim 10, wherein all of the exhaust gas flows through the first exhaust gas boiler, and a part of the exhaust gas for the power turbine is branched downstream of the first exhaust gas boiler.

The engine according to claim 10 or 11, wherein only the exhaust gas corresponding to the branched portion flows through the first exhaust gas boiler.

The engine according to any one of claims 9 to 12, wherein the exhaust gas leaving the power turbine is re-entered into the main exhaust gas stream on the low pressure side of the turbocharger.

The engine according to any of claims 9 to 13, wherein the power turbine drives a generator.

15. The any one of claims 10 to 14, wherein the second exhaust gas boiler serves as a preheating boiler, and the first exhaust gas boiler is used to superheat steam generated by the second exhaust gas boiler. The institution described in

The engine according to claim 15, further comprising a steam turbine driven by superheated steam generated by the first and second exhaust gas boilers.

16. The engine is operative to recover a substantial amount of energy in the first exhaust boiler to obtain highly superheated steam, thereby improving the efficiency of the steam turbine. Listed in.

The scavenging is kept at a relatively high temperature so that the scavenging entering the cylinder has a high absolute water vapor content in order to increase the energy content of the exhaust gas for subsequent recovery in the boiler and / or power turbine. 18. An engine according to any of claims 9 to 17, wherein scavenging cooling is performed and the scavenging is humidified.

The first exhaust gas boiler and / or the second exhaust gas boiler are each disposed in the exhaust gas receiver, each comprising a plurality of cylinders coupled to the exhaust gas receiver via a respective manifold tube. The organization according to any one of 10 to 18.

The engine according to any one of claims 10 to 19, wherein the cooling capacity of the first and / or second boiler is selected such that the exhaust gas temperature is below the outside air.

21. An engine according to any one of claims 9 to 20, wherein a part of the exhaust gas stream is recirculated.

The engine of claim 21, wherein a portion of the exhaust gas being recirculated is branched from an exhaust gas stream downstream of the first boiler.

In order to improve the ability to recover energy from exhaust gas while improving the freedom of adjustment of operating conditions,
An exhaust gas turbine that drives the generator;
An air supply compressor driven by an electric motor;
A heat exchanger for extracting heat from the exhaust gas, provided on the high pressure side of the turbine downstream of the cylinder;
And the heat exchanger is configured to reduce the temperature of the exhaust gas exiting the heat exchanger such that the temperature of the exhaust gas exiting the turbine downstream of the heat exchanger is less than the outside air temperature , A crosshead large supercharged two-cycle diesel engine.

The large supercharged two-cycle diesel engine according to claim 23, wherein electric power generated from the generator is handled by a control unit that is operated in accordance with an electric power control program or an operation by an operator.

25. A large supercharged two-stroke diesel engine according to claim 23 or 24, wherein the heat exchanger is used to generate steam.

26. The large supercharged two-cycle of claim 25, further comprising means for storing a portion of the electrical energy generated by the generator and means for supplying the stored electrical energy to the electric motor. Diesel engine.

27. A large supercharged two-cycle diesel engine according to claim 26, further comprising means for controlling the distribution of the electrical energy generated by the generator and the stored energy.

28. A large turbocharged two-cycle diesel engine according to any of claims 25 to 27, further comprising a steam turbine driven by steam generated with the aid of heat from the heat exchanger.

A crosshead supercharged two-cycle diesel engine used in a cogeneration plant to generate electric power and heat,
An intake system for taking in air at an outside air pressure and an outside air temperature, the intake system comprising a compressor for supplying a supply air whose pressure exceeds the outside air to a cylinder of the engine;
A turbine driven by exhaust gas;
A heat exchanger for extracting heat from the exhaust gas, provided on the downstream side of the cylinder and on the high pressure side of the turbine;
And the heat exchanger and the turbine are configured such that the exhaust gas temperature on the low pressure side of the turbine is lower than the outside air.

The exhaust gas temperature below the outside air is a large-capacity heat exchanger for accelerating the temperature decrease of the exhaust gas passing through the heat exchanger, and for accelerating the decrease of the exhaust gas temperature when the exhaust gas expands in the turbine. 30. The engine according to claim 29 , obtained by a small effective turbine area.

Is between 500 ° C. the temperature is 400 ° C. of the exhaust gases leaving the cylinder, the temperature of the exhaust gas leaving the exhaust gas boiler is less than 110 ° C., a pressure of the exhaust gases leaving the boiler is greater than 2 bar, according to claim 29 Institutions.

The engine according to claims 29 to 32 , wherein the turbine and the compressor are connected by a shaft to form a turbocharger.

33. The engine of claim 32 , further comprising an auxiliary blower that assists the turbine to supply charge to a cylinder of the engine, particularly when the engine operates at its maximum continuous load.

34. An engine according to claim 32 or 33 , further comprising a power turbine driven by exhaust gas diverging from the exhaust gas flow to the turbocharger turbine downstream of the boiler.

35. An engine according to any of claims 29 to 34 , further comprising a steam turbine powered by steam generated with heat extracted from the exhaust gas by the heat exchanger.

36. The engine according to any one of claims 29 to 35 , further comprising a supply air humidification unit on a high pressure side of the compressor.

37. An engine according to any of claims 29 to 36 , wherein the pressure of the exhaust gas exiting the turbine is equal to or slightly above the outside air pressure.

38. An engine according to any one of claims 29 to 37 , wherein the temperature of the exhaust gas leaving the turbine is below the ambient temperature at least when the engine is operating at its maximum continuous load.

The engine according to any of claims 29 to 38 , wherein the temperature of the exhaust gas leaving the turbine is between -5C and -40C, at least when the engine is operating at its maximum continuous load. .

And further comprising another turbine used in place of or in combination with the turbine, the additional turbine having an effective turbine area such that the exhaust gas temperature on the low pressure side of the one or more turbines exceeds the outside air. 40. An engine according to any of claims 29 to 39 , provided to modify

41. An engine according to any of claims 29 to 40 , wherein the turbine is of a type with a variable effective turbine area for operating the engine at various exhaust gas temperatures.

A crosshead supercharged two-cycle diesel engine,
An intake system for taking in air at an outside air pressure and an outside air temperature, the intake system comprising a compressor for supplying a supply air whose pressure exceeds the outside air to a cylinder of the engine;
A first turbine having a predetermined effective turbine area driven by exhaust gas;
A second turbine having a predetermined effective turbine area driven by exhaust gas;
A heat exchanger for extracting heat from the exhaust gas, provided on the high pressure side of the turbine downstream of the cylinder;
Means for selectively using one or both turbines to adjust the exhaust gas temperature on the low pressure side of the turbine and adjusting the amount of energy extracted by the heat exchanger;
A crosshead supercharged two-cycle diesel engine.

A crosshead supercharged two-cycle diesel engine,
An intake system for taking in air at an outside air pressure and an outside air temperature, the intake system comprising a compressor for supplying a supply air whose pressure exceeds the outside air to a cylinder of the engine;
A turbine with variable effective turbine area driven by exhaust gas;
A heat exchanger for extracting heat from the exhaust gas, provided on the high pressure side of the turbine downstream of the cylinder;
A crosshead supercharged two-cycle diesel engine that varies the exhaust gas temperature on the low pressure side of the turbine and thereby adjusts the amount of energy extracted by the heat exchanger.

A method of operating a crosshead supercharged two-cycle diesel engine,
The engine is an intake system for taking in air having an outside air pressure and an outside air temperature, the intake system including a compressor for supplying the intake air whose pressure exceeds the outside air to the cylinder of the engine, and driven by exhaust gas A first turbine having a predetermined effective turbine area, a second turbine having a predetermined effective turbine area driven by exhaust gas, and the exhaust gas provided on the high pressure side of the turbine downstream of the cylinder A heat exchanger that extracts heat from the
Selectively using the turbine to obtain various exhaust gas temperatures on any one or more low pressure sides of the turbine, thereby adjusting the amount of energy extracted by the heat exchanger. .