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| Research on Density Calculation Method in LNG Tank |
| ZHAO Jin-rui,WU Zhong-kun,ZHANG Da-wei,WU Jian-liang,WANG Tong-ji |
| Sinopec Qingdao LNG Co. Ltd., Qingdao, Shandong 266400, China |
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Abstract Whether the average of the multipoint density measured by integrated transmitter of liquid level, temperature and density is accurate can be judged by qualitative way or quantitative way. One kind of density is calculated through the component of liquefied natural gas in the tank. Another kind of density is temperature modification of the incoming liquefied natural gas density. The two kinds of density compare with the mean value of multipoint density measured by LTD. This method above is quantitative judgment. Several fitting formulas are deduced for density of the two groups above using polynomial fitting method. Using the stock relation, the best correct formula can be obtained.
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Received: 22 May 2019
Published: 19 January 2021
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2021, Vol. 42 
