THERMAL SCIENCE

International Scientific Journal

HEAT TRANSFER PERFORMANCE OF THERMAL-WASHING PROCESS FOR CRUDE OIL PIPELINE

ABSTRACT
Study on the thermal wash multiphase flow and heat transfer characteristics have important significance to reduce energy consumption in wax removal. The thermal washing process of multiphase flow melting characteristics were simulated based on VOF model and RNG k -e turbulence model. The melting temperature and pressure curves of wax were obtained under different initial conditions. The results show that the distribution of temperature in the pipe is uneven due to the action of gravity. Compared with the water temperature, the flow velocity has a greater influence on convection type. When the flow velocity is 0.5 m/s, the flow pattern of liquid wax is mainly suspended flow. When the flow velocity is 2 m/s, the wall flow is observed. The greater speed is or the higher temperature is, the faster melting rate is. And the temperature increment varies with positions of the pipeline. Based on this study, we found suitable conditions of hot wax cleaning, which we could save the cost of natural gas.
KEYWORDS
PAPER SUBMITTED: 2017-09-18
PAPER REVISED: 2017-12-21
PAPER ACCEPTED: 2017-12-23
PUBLISHED ONLINE: 2018-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI170918060Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Supplement 2, PAGES [S749 - S758]
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© 2018 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence