Floating LNG Plant(三)
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摘要:FPSO Development Program Air Products has been involved with various FPSO studies for the past 20 years and is confident the MCR cryogenic exchanger process performance and structural integrity are not adversely impacted by wave motion on a floati..
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FPSO Development Program Air Products has been involved with various FPSO studies for the past 20 years and is confident the MCR cryogenic exchanger process performance and structural integrity are not adversely impacted by wave motion on a floating plant, regardless of exchanger height. The geometry of the tube bundle inherently resists motion-induced liquid maldistribution throughout the bundle length. A comprehensive research and development program was initiated in 1998 to demonstrate the wound coil exchanger performance when subjected to pitch, roll and heave motions. This two year program was designed to eva luate the structural integrity and process performance of the wound coil exchanger under expected FPSO sea conditions. Air Products consulted with shipbuilders and certification societies such as MossMaritime and DNV to obtain accurate sea state data and to perform verification of research methods and computations. Structural Integrity Air Products contracted the services of an outside expert in the field of motion induced stresses, Analytical Engineering Associates (AEA). AEA modeled Air Products' largest MCHE using finite element analysis techniques. Using accelerations from actual North Sea conditions, the analytical model determined stresses throughout the structural components of the MCHE. Air Products also performed empirical fatigue testing in our own R&D facilities to verify the robustness of the tube bundle support system under simulated FPSO conditions. All data was thoroughly eva luated, and it was determined an Air Products' MCHE with a stainless steel shell would survive and subsequently be able to operate even after be exposed to a 100 year storm condition in the North Sea. All calculations and methodology have been certified by DNV. Process Performance Air Products contracted with Heriot-Watt University in Edinburgh, Scotland to perform motion experiments on an actual scaled version of a wound coil exchanger. Dr. Brian Waldie, Professor of Chemical and Offshore Process Engineering at Heriot-Watt led this effort. Dr. Waldie has over thirty years of experience working in the chemical industry and is recognized by the oil and gas industry as an expert in applications of process technology to offshore environments. The results of these experiments provided the necessary process information to insure the MCHE process performance can be quaranteed in an FPSO environment
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