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Keywords: coefficient
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Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 14–17, 2019
Paper Number: PSIG-1906
... = 2 2 If we use Blasius formula for the hydraulic resistance coefficient then diameter can be expressed explicitly from this equation. It should be noted that the same law for the hydraulic resistance coeffiecent should be used both in the adaptation process and in the following modeling. Data...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 14–17, 2019
Paper Number: PSIG-1932
... procedures for computing the following: Isothermal bulk modulus as a function of base density, temperature and pressure. Isochoric specific heat as a function of base density, temperature and pressure. Coefficient of thermal expansion as a function of base density, temperature and pressure Isobaric...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 9–12, 2017
Paper Number: PSIG-1704
...-1 below. 9-1. y = -0.1793x + 0.9983 Repeating those steps to find the equations for the other 2 data sets give the following equations. 9-2. y = -0.3043x + 1.0807 9-3. y = -0.2754x + 1.0615 Defining the equation coefficients in terms of the coordinates from the data sets gives an equation as shown...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 9–12, 2017
Paper Number: PSIG-1709
... resistance. It is well known that once installed in the piping system, the control valve characteristics (the relationship between valve flow coefficient and valve opening will change) (Sines, 2009, Headley 2003). A so called installed valve coefficient is introduced to describe this behavior. The valve...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 9–12, 2017
Paper Number: PSIG-1711
... magnitude coefficient b Transient error decay coefficient Bias error coefficient The three coefficients determined in Equation 4 define all key performance characteristics of the leak detection system over all the averaging windows considered. To illustrate the fit, three cases are plotted in Figure...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 9–12, 2017
Paper Number: PSIG-1714
... Temperature gradient between the pipe wall and centerline flow is high High-yield flow stress occurring due to changes in flow behavior such as paraffin content, fluid viscosity, flow rates, gas/oil ratio, and heat transfer coefficient Oil Assay Crude oil assays define physical and chemical characteristics...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 10–13, 2016
Paper Number: PSIG-1606
... measured in centipoise (CP). Kinematic Viscosity (ν) – is a measure of the time required for a given volume of liquid to flow through an orifice or restriction. Often measure in Centistokes (CST). relief valve heavy crude closure software psig 1606 heat transfer coefficient reservoir...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 12–15, 2015
Paper Number: PSIG-1512
... input coefficient, polytropic head coefficient and total flow coefficient as non-dimensional parameters that can not only model the compressor with all the variability mentioned above, but also indicate when there is a performance problem. This new approach proposes the use of real time input data and...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 12–15, 2015
Paper Number: PSIG-1516
... simulation interest group production control temperature profile pipeline psig 1516 upstream oil & gas fluid modeling deviation equation of state simulator reservoir surveillance simulation tool gas temperature clausen heat transfer coefficient steady-state temperature prediction methane...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 6–9, 2014
Paper Number: PSIG-1403
... data. We discuss building daily demand models using monthly consumption data, including what inputs can be used so that model coefficients are identifiable. Significantly more accurate models are built using two temperature inputs instead of a single temperature input. This approach fits the data much...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, April 16–19, 2013
Paper Number: PSIG-1315
... liquid motion containing DRA is proposed. The model takes into account the gradual breakup of DRA in a pipeline flow. The influence of DRA is considered as a dependence of hydraulic resistance coefficient on the DRA concentration; the DRA concentration in turn depends on a travel distance in a pipeline...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 15–18, 2012
Paper Number: PSIG-1210
... the United States ethane futures are sold on the NYMEX electronic futures exchange. downstream oil & gas pipeline ethane phase envelope psia ethylene plant pump station shale gas complex reservoir gas monetization thermal expansion coefficient lng hydrocarbon propane psig...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 15–18, 2012
Paper Number: PSIG-1213
... number of these papers[3],[4],[8] also present investigations into various simplifications that can be made to the physics of the thermal model and to what extent these simplifications affect the accuracy. average absolute relative difference simulation relative difference coefficient...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 24–27, 2011
Paper Number: PSIG-1107
... turbine is not mechanically coupled with the part load turbine, which permits the turbine operates under the characteristic of a unique running line. The correlation is modeled by mean of linear functions with the coefficients adjusted using an ordinary least square for each turbine unit. The operational...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 24–27, 2011
Paper Number: PSIG-1119
... thermal model comparison coefficient piping simulation pipeline upstream oil & gas numerical diffusion temperature front propagation production monitoring distance step thickness gas pipeline pipeline temperature piping design cylindrical shell ground model time constant...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 24–27, 2011
Paper Number: PSIG-1125
... effective reservoir pressure psig 1125 well interference field pressure reservoir flow rate inventory reservoir performance coefficient machine learning reservoir pressure pinnacle reef reservoir observation well pressure interference artificial intelligence modeling...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 11–14, 2010
Paper Number: PSIG-1010
... coefficient. There exists an analytical steady-state solution for k for a cylinder near a half-plane, which corresponds to the geometry of a buried pipeline [8]. Nevertheless, it is a common practice to calculate k as for a set of concentric cylindrical layers with the distance between the boundary of an...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 11–14, 2010
Paper Number: PSIG-1013
... same way the pump characteristic coefficients, diameter of the tank and capacity of the valve are considered to be known. Model equations We will consider the current in the pipeline as an isothermal flow of the poorly compressible fluid. Under these conditions the flow process can be described using...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 12–15, 2009
Paper Number: PSIG-0901
... heat transfer modeling, and how this affects the estimated gas temperature. The importance of a correct total heat transfer coefficient for different conditions has been studied, and the most important parameters associated with this coefficient have been identified. A recommendation regarding which...
Proceedings Papers

Paper presented at the PSIG Annual Meeting, May 12–15, 2009
Paper Number: PSIG-09A1
... properties of the pipeline and its environment, such as thermal coefficients and yield stresses. The data required for each of these types may be further differentiated. In some cases small data variation leads to large discrepancies, whilst in other large differences yield smaller variations. During this...

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