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Paper Information

Title: 

MODIFYING GMA EQUATION OF STATE FOR ACCURATE CALCULATION OF NATURAL GAS AND LNG THERMO PHYSICAL PROPERTIES AT LOW AND HIGH PRESSURE

Type: PAPER
Author(s): MORADIAN MOJTABA,GHADER SATTAR*
 
 *DEPARTMENT OF CHEMICAL ENGINEERING, COLLEGE OF ENGINEERING, SHAHID BAHONAR UNIVERSITY OF KERMAN, KERMAN, IRAN
 
Name of Seminar: INTERNATIONAL CONFERENCE OIL, GAS, PETROCHEMICAL AND POWER PLANT
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVONI AMOZESHI PAZHOHESHI VESTA
Date:  2012Volume 1
 
 
Abstract: 

THE MAIN CONCERN OF THIS PAPER IS ON THE IMPROVEMENT OF THE GMA EQUATION OF STATE, WHICH HAS BEEN USED FOR DENSITY CALCULATION OF LIQUIDS WITH EXCELLENT ACCURACY. HOWEVER, GMA EQUATION OF STATE CANNOT PREDICT THE DENSITY OF COMPONENTS IN GAS REGION AND THEREFORE CANNOT BE USED FOR CALCULATION OF NATURAL GAS THERMO PHYSICAL PROPERTIES. GMA EQUATION OF STATE IS BASED ON INTERMOLECULAR POTENTIAL ENERGY, THEREFORE, THE POTENTIAL ENERGY OF THE GMA EQUATION OF STATE IS CORRECTED AND AN MODIFIED EQUATION OF STATE IS OBTAINED WHICH CAN CALCULATED THERMO PHYSICAL PROPERTIES IN GAS AS WELL AS LIQUID REGION. THE FINAL FORM OF THE NEW EQUATION OF STATE, LIKE GMA, IS A REGULARITY BETWEEN (Z-1) V3 AND Ρ AT ALL TEMPERATURES, WHICH IS OBTAINED BY (9, 6, 3) LENNARD-JONES POTENTIAL. NATURAL GAS DENSITY, HEAT CAPACITY AND SECOND VIRIAL COEFFICIENT ARE CALCULATED BY NEW EQUATION OF STATE WHICH IS NAMED ISOTHERM REGULARITY EQUATION OF STATE (IR EOS). THE CAPABILITY OF THE NEW EQUATION OF STATE IS EXAMINED BY COMPARING ITS RESULTS WITH EXPERIMENTAL DATA. THE NEW EQUATION OF STATE GIVES EXCELLENT RESULTS IN DENSITY OF NATURAL GAS AND LNG WHILE IT REPRODUCES OTHER THERMO PHYSICAL PROPERTIES WITH LESS ACCURACY.

 
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