Testing of a Buried LNG Tank
Development of alternative fuels is a significant national priority. Liquefied natural gas (LNG) is an alternative fuel that has many attractive features. However, before LNG can be extensively exploited, the infrastructure for transferring, storing, and dispensing LNG needs to be developed. One important aspect of this development is addressing technology issues associated with installing LNG dewars at customer sites. The National Fire Protection Association (NFPA) has recently revised standards 57 A and 59 covering installation of these dewars. This paper describes a test program that was conducted through a collaborative effort between the East Ohio Gas Company and NASA Lewis Research Center. Test results are shown for data that was collected on a LNG dewar that was buried at a site in Norfolk, VA. Data are used to validate predictions of vapor generated during normal operations and failure (loss of dewar vacuum) conditions. Data are also used to validate predictions of soil temperature surrounding the dewar. This testing provides information that will be useful in improving the NFPA code, and will lead to the safe and effective implementation of LNG as an alternative fuel.
KeywordsSoil Temperature Annular Space Soil Pressure National Fire Protection Association Outer Jacket
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