More accurate measurement standards developed for use in world trade
National Bureau of Standards cryogenic engineers in Boulder, Colo., have been working with LNG mixtures at temperatures down to -260/sup 0/F for years (see also Gas Abstr. 32, 76-0868). An important NBS contribution is the accurate determination of the thermophysical properties of pure methane from 90 to 500/sup 0/K at pressures to 70 MPa. An NBS study of the thermophysical properties of compressed and liquefied ethane is now updating provisional thermodynamic-property tables covering the temperature range of 90 to 600/sup 0/K at pressures to 70 MPa; a similar project for propane was initiated this year. A recently published bibliography provides cryogenic data on equilibrium properties of fluid mixtures. In response to industrial needs, NBS in 1972 initiated a study of the orthobaric densities of liquefied hydrocarbon gases and their mixtures. Data obtained will greatly improve the reliability of worldwide custody-transfer operations. A magnetic suspension densimeter has been used to obtain accurate orthobaric density data for liquefied methane, ethane, propane, butane, and nitrogen. The size and complexity of the international and interstate measurement system provides NBS with many new opportunities in the traditional areas of measurement.
- OSTI ID:
- 7068845
- Journal Information:
- Gas Ind., Nat. Gas Ed.; (United States), Vol. 20
- Country of Publication:
- United States
- Language:
- English
Similar Records
Estimated uncertainty of calculated liquefied natural gas density from a comparison of NBS and Gaz de France densimeter test facilities
NBS research on LNG thermophysical properties data and custody transfer measurement methods. Final report
Related Subjects
10 SYNTHETIC FUELS
METHANE
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
NATURAL GAS LIQUIDS
DENSITY
EQUILIBRIUM
HIGH TEMPERATURE
LIQUEFIED NATURAL GAS
LOW TEMPERATURE
MEDIUM TEMPERATURE
TRADE
US NBS
ALKANES
CRYOGENIC FLUIDS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
NATIONAL ORGANIZATIONS
NATURAL GAS
ORGANIC COMPOUNDS
033000* - Natural Gas- Properties & Composition
090110 - Hydrocarbon Fuels- Properties- (1979-1989)