(56a) Thermodynamic Vaporization and Condensation Process in Two-Phase LNG Expanders (Webcast Not Available)
AIChE Spring Meeting and Global Congress on Process Safety
2009
2009 Spring Meeting & 5th Global Congress on Process Safety
9th Topical Conference on Gas Utilization
LNG Equipment - I
Tuesday, April 28, 2009 - 8:30am to 8:55am
Two-Phase LNG expanders increase the production of LNG by replacing the Joule-Thomson valve in natural gas liquefaction plants. The expansion of the condensed LNG across the expander converts the available pressure energy into electrical energy and reduces the enthalpy of the LNG. Any reduction in enthalpy increases the production of LNG.
Across the expansion process vaporization and condensation occur affecting the energy conversion of the expander. This thermodynamic expansion process can be modeled by a non-linear differential equation for the enthalpy and pressure.
The paper presents practical methods to determine the thermodynamic expansion process in two-phase LNG expanders.
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2009 Spring Meeting & 5th Global Congress on Process Safety
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