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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 0.7

ISSN Print: 1940-2503
ISSN Online: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2016016880
pages 249-263

A MODEL TO CALCULATE HEAT LOSS OF FLOWING SUPERHEATED STEAM IN PIPE OR WELLBORE

Zhanxi Pang
MOE Key Laboratory of Petroleum Engineering, Beijing, China
Lushan Wang
China University of Petroleum, Beijing, China
X. C. Lv
China University of Petroleum, Beijing, China

ABSTRACT

Aiming at the flowing of superheated steam in a horizontal pipe and vertical wellbore, an improved model of heat loss was established to calculate physical properties of superheated steam along a pipeline or wellbore. Based on the basic theory of mass conservation, momentum conservation, and energy conservation, the model comprehensively considered the physical properties of water at different states, the structure of the pipeline and wellbore, friction loss, and heat conduction and heat convection during flowing. The test data of the oilfield verified that the model could give high-accuracy results about temperature and pressure levels. The results showed that the optimum steam flow rate was 25−35 t/h for a surficial horizontal pipeline with inner diameter of 0.1 m and the optimum steam flow rate should be chosen 3.5−7.5 t/h for a vertical wellbore with inner diameter of 0.076 m.


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