Honeywell SMV 3000 user manual Example Superheated Steam Using an Averaging Pitot Tube

C.2 Standard Flow Equation, Continued

Example:

Superheated Steam

Using an Averaging

Pitot Tube

An engineer has specified a SMV 3000 Smart Multivariable Transmitter to compensate for steam density changes and to calculate the mass flowrate of superheated steam using an averaging pitot tube. The engineer has sized the averaging pitot tube to produce a differential pressure of

13.21inches H2O at 45,000 lb/hr. The flowing pressure is 294.7 psia, flowing temperature is 590 degrees F, and flowing density is 0.49659 lbs/ft3.

The steps in Table C-2 show how to configure the SMV to calculate the PV4 flow variable for this application.

Table D-2 Superheated Steam using an Averaging Pitot Tube Configuration Example

Step Action

1Select a template for the SMV 3000 model you have for your flow application.

Select superheated steam mass flow in the Algorithm field of the FlowAlg tab and then select the Engineering Units (lb/h) on the FlowConf tab card.

2Click the Wizard . . . on the SCT/SMV 3000 configuration window to access the Flow Compensation Wizard Equation Model page.

3Select Standard from the Equation Model list box on the Equation Model page of the Flow Compensation Wizard to launch the Kuser Model, then click Next to proceed to the Fluid Type page.

4Select Steam as the fluid type from the list box on the Fluid Type page, then click Next to proceed to the Process Data page.

5Enter the relevant flow process data from the Averaging Pitot Tube Sizing Data Sheet into the appropriate entry fields on the Process Data page as follows:

Normal Flowrate	= 45,000 lb/hr
Normal DP	=	13.21 inches H2O @ 39.2 °F
Design Density	=	0.49659 lbs/ft3

You can change the engineering units by clicking on the text box with the right mouse button.

Click Next to proceed to the Flowing Variables page.

Continued on next page

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