Release:
2016, Vol. 2. №4About the authors:
Gennady V. Bakhmat, Cand. Sci. (Tech.), Professor, Department of Mechanics of Multiphase Systems, Institute of Physics and Technology, Tyumen State University; gennadiy.bakhmat@gmail.comAbstract:
The purpose of this work is the calculation of the thermodynamic parameters of steam in the node “steam generator — starter reamer” for the newly designed steam unit. The dependence of the velocity and the maximum steam consumption from the pipe diameter and the roughness of its surface were investigated to determine the parameters that suffice the technological requirements. The simple approximate formula was obtained, which is applicable for high Reynolds numbers, and which allows to determine the velocity of the vapor at the exit of the steam pipe without resorting to iteration, taking into account the viscosity of steam and the inner surface roughness of the steam pipe. The calculations are performed with HS-diagram. The “lock-effect” of vapor stream on exit from the steam generator to starter reamer for high pressure differential was taken into account. The studies concluded to the findings of the pressure, temperature, specific entropy, specific enthalpy and specific volume and water vapor velocity on technologic scheme: “steam generator — steam conductor — starter reamer — second steam conductor — the atmosphere”. It proves that energy losses, which are caused by vapor viscous and tube roughness, give considerable (more than 50%) correction to vapor velocity for the first steam conductor. At the same time similar amendments for the second steam conductor are negligible due to the lower rate of vapor movement. It is also proved that the heat-exchange with surrounding air even in the winter season gives small correction (less than 2.5ºC).The received results were used to project the new starter reamer for steam generator model EF-48-SG-GF-2577-V on the Usinsk oil field.
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