NDLI: Research on Exergy Flow Composition and Exergy Loss Mechanisms for Waxy Crude Oil Pipeline Transport Processes

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Research on Exergy Flow Composition and Exergy Loss Mechanisms for Waxy Crude Oil Pipeline Transport Processes

Content Provider	MDPI
Author	Cheng, Qinglin Gan, Yifan Su, Wenkun Liu, Yang Sun, Wei Xu, Ying
Abstract	The basic theory of exergy was used to derive the formulae of physical and chemical exergy in the process of pipeline transportation, combined with the effect of wax deposition on the thermodynamic parameters including specific heat, density, chemical potential and concentration gradient. On the basis of this, the expression of various exergy losses were derived, and the exergy balance model was then built in the process. For the case study, a waxy crude oil pipeline in China was selected. The mechanism for how wax deposition affected the physical and chemical exergy loss was studied through analyzing the axial pipeline distribution of pressure, temperature, flow rate and thickness of insulation layer. Finally, under the design flow of 66 × 103 kg·h−1, the orthogonal experimental analysis method was used for comparing the degree of specific factors which could influence the total exergy efficiency. The highest exergy efficiency combination of working conditions was then determined. This research could provide a theoretical basis for guiding safe and economic operation in the actual pipeline transportation process.
File Size	5602304
File Format	PDF
e-ISSN	19961073
DOI	10.3390/en10121956
Journal	Energies
Issue Number	12
Volume Number	10
Language	English
Publisher Date	2017-11-24
Access Restriction	Open
Subject Keyword	waxy crude oil wax precipitation physical exergy chemical exergy exergy loss
Content Type	Text
Resource Type	Article

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