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Minimizing the pressure gradients in capsule pipelines
Author(s) -
Ellis H. S.,
Kruyer Jan
Publication year - 1974
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450520404
Subject(s) - pipeline transport , pipeline (software) , capsule , volume (thermodynamics) , materials science , power density , pressure gradient , mechanics , power (physics) , composite material , marine engineering , environmental science , geology , mechanical engineering , engineering , physics , thermodynamics , paleontology
The pressure gradients due to cylindrical capsules were reduced by up to 80% by providing them with plastic instead of steel surfaces or by fitting them with collars. The power requirements of a capsule pipeline depend greatly on the capsule density, and if the capsules were constructed so that a third of the volume consisted of voids, the power needed to transport two teragrammes (2 million tons)/year of solid with a density of 1500 kg.m −3 (S.G. = 1.50) in a 254 mm (10 in.) pipeline would be reduced by over 90%. The pressure gradients and power required to transport spherical capsules were generally much smaller than those required for even the smoothest cylinders of the same specific gravity.