cpa manual & tech notes, v2 - july 7th, 2014 flow conditioner pressure drop calculation of the...

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Canada Pipeline Accessories | 1.888.349.3569 | www.flowconditioner.com | [email protected] | July 7, 14 29 CPA Flow Conditioner Pressure Drop Calculation of the pressure drop across a flow conditioner uses basic fluid dynamic principles and experimental data from different fluid scenarios. There is no typical pressure drop value as the pressure drop behavior is always fluid application dependent; changes in flow velocity, viscosity and density can all cause large changes in the resulting values. The pressure loss coefficient (K) is also dependent on the process conditions of the application, but cannot be theoretically calculated using textbook equations; it must be experimentally determined through testing for each unique element geometry. Where, K = Pressure loss coefficient. ΔP = Pressure drop across a section of pipe or a fitting. ρ = Bulk fluid density, kg/m 3 . V = Bulk fluid velocity, m/s. Sample Flow Conditioner K Factors vs Pipe Reynolds Number. CPA can perform a custom pressure drop calculation for any flow conditioner upon request. As these calculations are dependent on the fluid properties of the metering scenario, the process conditions will be required to carry the calculation. Please let CPA know and a pressure drop request form will be required that lists all of the data needed to provide the most accurate results. 2 2 V k P

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Canada Pipeline Accessories | 1.888.349.3569 | www.flowconditioner.com | [email protected] | July 7, 14 29

CPA Flow Conditioner Pressure Drop  Calculation of the pressure drop across a flow conditioner uses basic fluid dynamic principles and experimental data from different fluid scenarios.  There is no typical pressure drop value as the pressure drop behavior is always fluid application dependent; changes in flow velocity, viscosity and density can all cause large changes in the resulting values.  The pressure loss coefficient (K) is also dependent on the process conditions of the application, but cannot be theoretically calculated using textbook equations; it must be experimentally determined through testing for each unique element geometry.  

  Where, 

• K = Pressure loss coefficient. • ΔP = Pressure drop across a section of pipe or a fitting. • ρ = Bulk fluid density, kg/m3. • V = Bulk fluid velocity, m/s. 

 

Sample Flow Conditioner K Factors vs Pipe Reynolds Number. 

 CPA can perform a custom pressure drop calculation for any flow conditioner upon request.  As these calculations are dependent on the fluid properties of the metering scenario, the process conditions will be required to carry the calculation.  Please let CPA know and a pressure drop request form will be required that lists all of the data needed to provide the most accurate results.   

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2VkP

Canada Pipeline Accessories | 1.888.349.3569 | www.flowconditioner.com | [email protected] | July 7, 14 30

Sample Pressure Drop Values, Methane & Water  

  

Sample Pressure Drop Values, Light Oil & Heavy Oil  

 

Canada Pipeline Accessories | 1.888.349.3569 | www.flowconditioner.com | [email protected] | July 7, 14 31

CPA Flow Conditioner Pressure Drop Request Form  When submitting, please include any specification sheets that describe application process conditions. 

Please note that the pressure drops calculations assume fully developed flow. Installation effects, swirl or any other type of flow disturbance can change the flow conditioner behavior, K factor and pressure drop calculation results. If a more detailed calculation is required, please contact CPA to discuss modeling the meter station using computational fluid dynamic analysis.