New Technique Determines Appropriate Location of Line Heaters in Gas Transmission Pipelines
In most onshore gas transmission systems, hydrate formation is controlled using a line heater to maintain the flowing mixture temperature above the hydrate formation temperature. The aim of this study is to describe a new correlation for predicting hydrate-forming conditions, produce a simple and easy-to-use method for computing the gas temperature profile, and thus provide an estimation for the appropriate location of the line heaters. With the use of an example, it is shown that the proposed technique can be used for the design of the heating system of a gas transmission pipeline.
Abstract The Graetz problem describes the temperature (or concentration) field in fully-developed laminar flow in a circular tube where the wall temperature (or concentration) profile is a step-function. A great deal of analysis has been performed on this fundamental problem: a detailed survey of the relevant abundant literature may be found in [1] . The infinite series solution of the problem, referred to as the Graetz series, is