Next Article in Journal
Exergy Analyses of Onion Drying by Convection: Influence of Dryer Parameters on Performance
Previous Article in Journal
Maximum Entropy Theory of Ecology: A Reply to Harte
Open AccessArticle

Studies on the Exergy Transfer Law for the Irreversible Process in the Waxy Crude Oil Pipeline Transportation

1
Key Lab of Ministry of Education for Enhancing the Oil and Gas Recovery Ratio, Northeast Petroleum University, Daqing 163318, China
2
PetroChina Planning & Engineering Institute (CPPEI), Daqing 163318, China
*
Author to whom correspondence should be addressed.
Entropy 2018, 20(5), 309; https://doi.org/10.3390/e20050309
Received: 7 April 2018 / Revised: 19 April 2018 / Accepted: 20 April 2018 / Published: 24 April 2018
(This article belongs to the Section Thermodynamics)
With the increasing demand of oil products in China, the energy consumption of pipeline operation will continue to rise greatly, as well as the cost of oil transportation. In the field of practical engineering, saving energy, reducing energy consumption and adapting to the international oil situation are the development trends and represent difficult problems. Based on the basic principle of non-equilibrium thermodynamics, this paper derives the field equilibrium equations of non-equilibrium thermodynamic process for pipeline transportation. To seek the bilinear form of “force” and “flow” in the non-equilibrium thermodynamics of entropy generation rate, the oil pipeline exergy balance equation and the exergy transfer pipeline dynamic equation of the irreversibility were established. The exergy balance equation was applied to energy balance evaluation system, which makes the system more perfect. The exergy flow transfer law of the waxy oil pipeline were explored deeply from the directions of dynamic exergy, pressure exergy, thermal exergy and diffusion exergy. Taking an oil pipeline as an example, the influence factors of exergy transfer coefficient and exergy flow density were analyzed separately. View Full-Text
Keywords: non-equilibrium thermodynamics; entropy generation rate equation; entropy flow; exergy transfer equation; exergy flow transfer law non-equilibrium thermodynamics; entropy generation rate equation; entropy flow; exergy transfer equation; exergy flow transfer law
Show Figures

Figure 1

MDPI and ACS Style

Cheng, Q.; Zheng, A.; Song, S.; Wu, H.; Lv, L.; Liu, Y. Studies on the Exergy Transfer Law for the Irreversible Process in the Waxy Crude Oil Pipeline Transportation. Entropy 2018, 20, 309.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop