To reduce work at an installation site when a plant facility is manufactured, modules are conveyed in order from a fabrication yard to the installation site, and expansion and contraction amounts of pipe spools are calculated based on a temperature difference between a temperature at the fabrication yard when the modules are manufactured and a temperature at the installation site when the modules are installed at the installation site. Further, an installation position of a foundation is adjusted toward a direction to cancel out the expansion and contraction amounts of the plurality of pipe spools, and the pipe spool is moved toward the direction to cancel out the expansion and contraction amounts of the plurality of pipe spools. The modules are installed with the positions of the end portions of the pipe spools being adjusted.

A drive system for liquefied natural gas (LNG) refrigeration compressors in a LNG liquefaction plant. Each of three refrigeration compression strings include refrigeration compressors and a multi-shaft gas turbine capable of non-synchronous operation. The multi-shaft gas turbine is operationally connected to the refrigeration compressors and is configured to drive the one or more refrigeration compressors. The multi-shaft gas turbine uses its inherent speed turndown range to start the one or more refrigeration compressors from rest, bring the one or more refrigeration compressors up to an operating rotational speed, and adjust compressor operating points to maximize efficiency of the one or more refrigeration compressors, without assistance from electrical motors with drive-through capability and variable frequency drives.

Low-temperature refrigeration device arranged in a frame and comprising a working circuit forming a loop and containing a working fluid, the working circuit forming a cycle comprising in series: a compression mechanism, a cooling mechanism, an expansion mechanism and a heating mechanism, the device comprising a refrigeration heat exchanger intended to extract heat from at least one member by exchanging heat with the working fluid, the mechanisms for cooling and reheating the working fluid comprising a common heat exchanger in which the working fluid transits in counter-flow in two separate transit portions of the working circuit, the compression mechanism comprising at least two compressors and at least one motor for driving the compressors, the working fluid expansion mechanism comprising at least one rotary turbine, the device comprising at least one drive motor comprising a drive shaft, one end of which drives a compressor and the other end of which is coupled to a turbine, the motor being attached to the frame at at least one fixed point, the common heat exchanger being attached to the frame at at least one fixed point, the two counter-flow transit portions of the common heat exchanger being orientated in a longitudinal direction of the frame, the drive shaft of the drive motor being orientated in a direction parallel or substantially parallel to the longitudinal direction and the turbine and the compressor being arranged relatively longitudinally such that the turbine is located longitudinally on the side corresponding to the relatively cold end of the common heat exchanger when the device is being operated and the compressor is located longitudinally on the side corresponding to the relatively hot end of the common heat exchanger when the device is being operated.

Disclosed is a low-temperature refrigeration device comprising a working circuit that forms a loop and contains a working fluid the working circuit forming a cycle which includes, connected in series: a compression mechanism, a cooling mechanism, an expansion mechanism and a heating mechanism, the device further comprising a refrigeration heat exchanger for extracting heat from at least one member by exchanging heat with the working fluid flowing in the working circuit, the compression mechanism comprising two separate compressors, the mechanism for cooling the working fluid comprising two cooling heat exchangers which are arranged respectively at the outlet of the two compressors and ensure heat exchange between the working fluid and a cooling fluid, each cooling heat exchanger comprising a cooling fluid inlet and a cooling fluid outlet, characterized in that the cooling fluid outlet of one of the two cooling heat exchangers is connected to the cooling fluid inlet of the other cooling heat exchanger.

The present disclosure provides a heat exchanger system and a method of using the heat exchanger system for heating, cooling or condensing a gaseous multiple component process stream comprising at least one hydrocarbon. The heat exchanger system comprises: —a shell having at least one first inlet and at least one first outlet defining a flow path for a first process fluid, and at least one second inlet and at least one second outlet defining a flow path for a second process fluid; —a number of parallel tubes arranged in the shell between the first inlet and the first outlet, each tube having an outer surface being provided with a multitude of plate fins extending radially outward from the outer surface; the first flow path extending along the outer surface of the tubes, and the second flow path extending through the tubes. The multiple component process stream may comprise two or more components selected from the group of methane, ethane, propane, and nitrogen. The heat exchanger may be used to cool or condense a mixed refrigerant, comprising one or more hydrocarbons, in a process for the liquefaction of natural gas.

A natural gas liquefying apparatus is provided. At least a part of a cooling region, in which a precooling unit and a liquefaction unit are arranged, and at least a part of a compression region, in which first and second compressors compressing refrigerants to be used in the precooling unit and the liquefaction unit are arranged, are arranged to be opposed to each other across a long side of a second refrigerant cooler group arrangement region in which a liquefying refrigerant is cooled. A first refrigerant cooler group arrangement region, in which a precooling refrigerant is cooled, is arranged so that a long side of the first refrigerant cooler group arrangement region is opposed to one side of a rectangular region including the compression region, the one side being different from a side of the rectangular region opposed to a long side of the second refrigerant cooler group arrangement region.

A natural gas liquefying apparatus includes: a precooling unit, which is a treatment unit configured to precool natural gas; a liquefying unit, which is a treatment unit configured to liquefy the natural gas; a refrigerant cooling unit, which is a treatment unit configured to cool a liquefying refrigerant; a compression unit configured to compress vaporized refrigerants; and a pipe rack including air-cooled coolers arrayed and arranged on an upper surface. The treatment units and the compression unit are separately arranged in a first arrangement region and a second arrangement region arranged opposed to each other across a long side of the pipe rack. The pipe rack interposed between the first and second arrangement regions has a region in which no air-cooled cooler is arranged in order to arrange a plurality of pipes, through which refrigerants are allowed to flow, in a direction of a short side of the pipe rack.

A system and method for cooling a gas using a mixed refrigerant includes a compressor system and a heat exchange system, where the compressor system may include an interstage separation device or drum with no liquid outlet, a liquid outlet in fluid communication with a pump that pumps liquid forward to a high pressure separation device or a liquid outlet through which liquid flows to the heat exchanger to be subcooled. In the last situation, the subcooled liquid is expanded and combined with an expanded cold temperature stream, which is a cooled and expanded stream from the vapor side of a cold vapor separation device, and subcooled and expanded streams from liquid sides of the high pressure separation device and the cold vapor separation device, or combined with a stream formed from the subcooled streams from the liquid sides of the high pressure separation device and the cold vapor separation device after mixing and expansion, to form a primary refrigeration stream.

The present invention relates to a system for treating and cooling a hydrocarbon stream, comprising—a gas treatment stage comprising a pre-cooler to cool at least part of the hydrocarbon feed against cooling water, —a first cooling stage comprising one or more first water coolers, —a second cooling stage comprising one or more second water coolers. The system comprises a cooling water unit arranged to receive a stream of cooling water and supply a first part of the stream of cooling water to a chilling unit to obtain a stream of chilled cooling water and pass the stream of chilled cooling water to a selection of the at least one pre-cooler, the one or more first water coolers and the one or more second water coolers.

Provided is an operation analysis method for a production plant (1), including: acquiring, with use of a Doppler LIDAR (5), a distribution of three-dimensional wind condition data at positions of an upper space of the production plant (1) and a surrounding space thereof including an arrangement region for an air-cooled heat exchanger (2); acquiring environment data indicating a state of a natural environment that affects operation of the air-cooled heat exchanger (2); and learning, through a numerical analysis with use of a computer, based on a distribution of the three-dimensional wind condition data and on the environment data, a correspondence between a distribution pattern of the three-dimensional wind condition data and the environment data.