Calculation and Analysis on Thermodynamics Calculation of Nature-Gas Pipelines with Electric Heat Tracing

Abstract:

In order to restrain the hydrate formation in the gas transmission pipeline, according to the heat transfer theory of fluid in the circular tube of multilayer cylindrical wall, comprehensively considering many factors such as earth temperature variation, natural gas physical property and so on, we theorized numerical method and computational formula of thermodynamic calculation of buried electric heat tracing gas transmission pipeline, which are used to the field calculation. The results show that the outlet temperature of pipelines with electric tracing ribbon has a sensible rise, and the minimum is 3.8°C, under the conditions given in this paper, the maximum ups to 19.8°C, the relative percentage error between calculation results and actual measurement values is less than 5%, so we can concluded that the derived temperature drop formulas and the calculation software can totally meet the requirement in oilfield production.

• Periodical: Applied Mechanics and Materials (Volume 419)
• Pages: 91-96
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.419.91
• Online since: October 2013
• Authors: Shu Ren Yang, Di Xu, Chao Duan, Yu Yang Ge, Meng Ru Zhang
• Keywords: Electric Heat Tracing, Nature-Gas Pipeline, Thermodynamic Calculation

References

[1] Junliang Xu, Jian Liu, Hong Ren. Discussion of Gas Hydrate Core Sample Height[J]. Oil Field Equipment, 2010, 39 (10): 12-15.

[2] Dejie Gao, Xin Wang, Chunsheng Wang, etc. Temperature Drop Calculation for Natural Gas Transmission Pipeline[J]. Oil Field Equipment, 2011, 40 (7): 39-43.

[3] Changjun Li. Pipeline transmission of natural gas [M]. Beijing: Petroleum Industry Press, 2000: 1-15, 23-27, 29-37, 47-50, 62, 86-94.

[4] Yi Ding, Xiao Liu. Controlling Freezing/Ice Blockage Cases of Winter for Long-distance Natural Gas Pipeline [J]. Oil and Gas Storage and Transportation, 2012, 31(4): 318-319.

[5] Li Yao, Lina Zhang, Yun Zhao. Current Situations and Development Trend of Domestic and Foreign Gas Storage and Transportation Techniques [J]. Economy of Natural Gas, 2004(5): 63-66.

[6] Hongjun Wang. Single-tube Gas Electric Heating Gas Gathering Process[J]. Oil-gasfield Surface Engineering, 2004, 23(4): 24.

[7] Fei Jia, Lin Liao, Peng Han, etc. Selection of Electricity Heating Process and Its Matching [J]. Oil Field Equipment, 2004, S1: 89-91.

[8] Dong Wen, Hongjun Ma. Electric Heating System in the West-East Gas Pipeline Project[J]. Energy Conservation and Environmental Protection, 2004(12): 41-43.