Method for the uninterrupted operation of a gas liquefaction system

a gas liquefaction and continuous operation technology, applied in the direction of solidification, non-positive displacement fluid engines, lighting and heating apparatus, etc., can solve the problems of difficult startup or restart of single-shaft gas turbines, failure of the lng production process, and production downtime, so as to reduce the emission of greenhouse gases, reduce the load of compressors, and increase the thermal efficiency of plants
US20100257895A1Inactive Publication Date: 2010-10-14SIEMENS AG
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Patent Information

Authority / Receiving Office
US Β· United States
Patent Type
Applications(United States)
Current Assignee / Owner
SIEMENS AG
Publication Date
2010-10-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A method for the uninterrupted operation of a gas liquefaction system is provided, wherein the operation is continuously monitored for at least those users of the refrigerant compressor component which represent a two-digit percentage of the total load on the refrigerant compressor component. A total instantaneously available negative load reserve is calculated, and at least one predetermined turbine is switched off when the load reserve reachable via a frequency regulation of the one or more refrigerant compressors is lower than the energy demand of the largest of the refrigerant compressors and either a refrigerant compressor fails or a speed of frequency change for the power supply network for the gas liquefaction system exceeds a present threshold.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application is the US National Stage of International Application No. PCT / EP2008 / 058821 filed Jul. 8, 2008, and claims the benefit thereof. The International Application claims the benefits of European Patent Application No. 07013711.2 EP filed Jul. 12, 2007. All of the applications are incorporated by reference herein in their entirety.FIELD OF INVENTION

[0002] The invention relates to a method for the uninterrupted operation of a gas liquefaction plant, in particular a natural gas liquefaction plant.BACKGROUND OF INVENTION

[0003] The term liquefied natural gas (abbreviated to LNG) is applied to natural gas which has been liquefied by cooling it. LNG has less than 1 / 600th of the volume of natural gas at atmospheric pressure, and is thus especially suitable for transport and storage purposes; in this aggregate state it cannot be used as a fuel.

[0004] In power plants which are upstream of a plant for the liquefaction of light carbohydrates...

Claims

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