公开(公告)号：JP2002130598A

公开(公告)日：2002-05-09

申请号：JP2001225801

申请日：2001-07-26

Applicant: CHART INC

Inventor： DRUBE THOMAS KARL ,  DRUBE PAUL A ,  EMMER CLAUS D ,  BILY GILBERT J

IPC: G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22 ,  B67D5/08

Abstract: PROBLEM TO BE SOLVED: To calculate the distribution flow rate of cryogenic liquid with a high degree of accuracy. SOLUTION: In a cryogenic liquid distribution system, a distribution hose 30 communicating with a measurement chamber 15 and a meter 36 distributes LNG in the measurement chamber 15 equipped with the meter 36. A distribution line 28 is arranged between the meter 36 and the distribution hose 30 and equipped with a distribution valve 34. A check valve 64 is provided in a discharge line 62 which is bypassed to the distribution valve 34, to return captured LNG in the hose after distribution to the measurement chamber 15 due to pressurization caused by surrounding heat. Permittivity of LNG filled into the measurement chamber 15 is measured by a condenser probe and compared with the permittivity of pure methane. Based on this comparison, density and flow rate of LNG are determined.

公开(公告)号：DE60133697D1

公开(公告)日：2008-06-05

申请号：DE60133697

申请日：2001-07-11

Applicant: CHART INC

Inventor： DRUBE PAUL ,  EMMER CLAUS ,  DRUBE THOMAS KARL ,  BILY GILBERT J

IPC: F17C7/02 ,  G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22

Abstract: A system for dispensing cryogenic liquid to a use device includes a bulk storage tank providing LNG to a sump containing a meter submerged in LNG. A temperature probe is also submerged in the LNG. A dispensing line is positioned between the meter and dispensing hose and includes a dispensing valve. A drain line bypasses the dispensing valve and features a check valve so that LNG trapped in the hose after dispensing is returned to the sump due to pressurization by ambient heat. A capacitance probe is submerged in the LNG in the sump and provides a dielectric that is compared by a microprocessor with the dielectric for pure methane at the same temperature to determine the purity of the LNG. An approximate linear relation between density and dielectric may be used to determine density and mass flow for the LNG from the measured dielectric. Alternatively, a density compensation factor based upon the dielectrics may be calculated and applied to the density of pure methane to obtain the density and mass flow of the LNG. A further alternative embodiment substitutes a compensating meter for the capacitor and the equations for the resulting two meters may be solved to determine density and mass flow for the LNG.

公开(公告)号：AT393353T

公开(公告)日：2008-05-15

申请号：AT01305972

申请日：2001-07-11

Applicant: CHART INC

Inventor： DRUBE PAUL ,  EMMER CLAUS ,  DRUBE THOMAS KARL ,  BILY GILBERT J

IPC: F17C7/02 ,  G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22

Abstract: A system for dispensing cryogenic liquid to a use device includes a bulk storage tank providing LNG to a sump containing a meter submerged in LNG. A temperature probe is also submerged in the LNG. A dispensing line is positioned between the meter and dispensing hose and includes a dispensing valve. A drain line bypasses the dispensing valve and features a check valve so that LNG trapped in the hose after dispensing is returned to the sump due to pressurization by ambient heat. A capacitance probe is submerged in the LNG in the sump and provides a dielectric that is compared by a microprocessor with the dielectric for pure methane at the same temperature to determine the purity of the LNG. An approximate linear relation between density and dielectric may be used to determine density and mass flow for the LNG from the measured dielectric. Alternatively, a density compensation factor based upon the dielectrics may be calculated and applied to the density of pure methane to obtain the density and mass flow of the LNG. A further alternative embodiment substitutes a compensating meter for the capacitor and the equations for the resulting two meters may be solved to determine density and mass flow for the LNG.

公开(公告)号：AU5421101A

公开(公告)日：2002-02-07

申请号：AU5421101

申请日：2001-07-04

Applicant: CHART INC

Inventor： DRUBE THOMAS K ,  DRUBE PAUL A ,  EMMER CLAUS D ,  BILY GILBERT J

IPC: G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22 ,  G01F1/86 ,  G01F1/56 ,  G05D7/00

Abstract: A system for dispensing cryogenic liquid to a use device includes a bulk storage tank providing LNG to a sump containing a meter submerged in LNG. A temperature probe is also submerged in the LNG. A dispensing line is positioned between the meter and dispensing hose and includes a dispensing valve. A drain line bypasses the dispensing valve and features a check valve so that LNG trapped in the hose after dispensing is returned to the sump due to pressurization by ambient heat. A capacitance probe is submerged in the LNG in the sump and provides a dielectric that is compared by a microprocessor with the dielectric for pure methane at the same temperature to determine the purity of the LNG. An approximate linear relation between density and dielectric may be used to determine density and mass flow for the LNG from the measured dielectric. Alternatively, a density compensation factor based upon the dielectrics may be calculated and applied to the density of pure methane to obtain the density and mass flow of the LNG. A further alternative embodiment substitutes a compensating meter for the capacitor and the equations for the resulting two meters may be solved to determine density and mass flow for the LNG.

公开(公告)号：DE60133697T2

公开(公告)日：2009-07-02

申请号：DE60133697

申请日：2001-07-11

Applicant: CHART INC

Inventor： DRUBE PAUL ,  EMMER CLAUS ,  DRUBE THOMAS KARL ,  BILY GILBERT J

IPC: F17C7/02 ,  G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22

Abstract: A system for dispensing cryogenic liquid to a use device includes a bulk storage tank providing LNG to a sump containing a meter submerged in LNG. A temperature probe is also submerged in the LNG. A dispensing line is positioned between the meter and dispensing hose and includes a dispensing valve. A drain line bypasses the dispensing valve and features a check valve so that LNG trapped in the hose after dispensing is returned to the sump due to pressurization by ambient heat. A capacitance probe is submerged in the LNG in the sump and provides a dielectric that is compared by a microprocessor with the dielectric for pure methane at the same temperature to determine the purity of the LNG. An approximate linear relation between density and dielectric may be used to determine density and mass flow for the LNG from the measured dielectric. Alternatively, a density compensation factor based upon the dielectrics may be calculated and applied to the density of pure methane to obtain the density and mass flow of the LNG. A further alternative embodiment substitutes a compensating meter for the capacitor and the equations for the resulting two meters may be solved to determine density and mass flow for the LNG.

公开(公告)号：AU780126B2

公开(公告)日：2005-03-03

申请号：AU5421101

申请日：2001-07-04

Applicant: CHART INC

Inventor： DRUBE THOMAS K ,  DRUBE PAUL A ,  EMMER CLAUS D ,  BILY GILBERT J

IPC: G01F1/34 ,  B67D7/08 ,  F17C9/00 ,  F17C13/02 ,  G01F1/42 ,  G01F1/50 ,  G01F1/88 ,  G01N27/22 ,  G01F1/86 ,  G01F1/56 ,  G05D7/00

Abstract: A system for dispensing cryogenic liquid to a use device includes a bulk storage tank providing LNG to a sump containing a meter submerged in LNG. A temperature probe is also submerged in the LNG. A dispensing line is positioned between the meter and dispensing hose and includes a dispensing valve. A drain line bypasses the dispensing valve and features a check valve so that LNG trapped in the hose after dispensing is returned to the sump due to pressurization by ambient heat. A capacitance probe is submerged in the LNG in the sump and provides a dielectric that is compared by a microprocessor with the dielectric for pure methane at the same temperature to determine the purity of the LNG. An approximate linear relation between density and dielectric may be used to determine density and mass flow for the LNG from the measured dielectric. Alternatively, a density compensation factor based upon the dielectrics may be calculated and applied to the density of pure methane to obtain the density and mass flow of the LNG. A further alternative embodiment substitutes a compensating meter for the capacitor and the equations for the resulting two meters may be solved to determine density and mass flow for the LNG.