Reciprocating compressor simulator and a computer system using the same

• US 8,510,015 B2
• Filed: 06/16/2008
• Issued: 08/13/2013
• Est. Priority Date: 06/15/2007
• Status: Active Grant

• Current Assignee: Shell USA Incorporated (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Parchewsky, Robert Frank, Beausoleil, Peter Andrew
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US12/664,095
• Publication Number:
  US 20100286829A1
• Time in Patent Office: 1,884 Days
• Field of Search: 701/101, 701/102, 701/115, 702/45, 702/50, 702/182, 702/183, 702/187, 417/437, 417/439, 737/44
• US Class Current: 701/101
• CPC Class Codes: G05B 23/0229 knowledge based, e.g. expert systems; genetic algorithms
• CPC Class Codes: G06K 7/10009 sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves

Abstract

A method comprising operating a compressor; obtaining operating parameters of the compressor; starting a counter for a crankshaft angle from 0 to 360 degrees; calculating piston displacement and a volume of gas in a cylinder of the compressor as a function of the angle; and calculating a pressure within the cylinder.

Claims

1. A method comprising:

operating equipment comprising a piston within a cylinder;

obtain equipment parameters from the operating equipment;

reporting at least one operating parameter to a data repository;

obtaining parameters of the equipment from the data repository;

calculating a P-V cycle as a function of a crankshaft rotation angle;

calculating a rod load using the P-V cycle values;

determining if the cylinder pressure is greater than a suction line pressure

determining an angle at which a suction valve opened; and

determining the suction valve pressure loss.

2. The method of claim 1, further comprising using correctional measures for keeping the rod load below pre-defined levels.

3. A method comprising:

operating a compressor;

obtaining operating parameters of the compressor;

starting a counter for a crankshaft angle from 0 to 360 degrees;

calculating piston displacement and a volume of gas in a cylinder of the compressor as a function of the angle;

calculating a pressure within the cylinder;

determining if the cylinder pressure is greater than a suction line pressure;

determining an angle at which a suction valve opened; and

determining the suction valve pressure loss.

4. The method of claim 3, further comprising:

calculating a power loss caused by the suction valve.

5. The method of claim 3, further comprising:

determining if the cylinder pressure is greater than a discharge line pressure.

6. The method of claim 3, further comprising:

determining a discharge valve pressure loss.

7. The method of claim 3, further comprising:

calculating a power loss caused by the discharge valve.

8. The method of claim 3, further comprising:

calculating actual and theoretical flow through the cylinder.

9. The method of claim 3, further comprising:

calculating total power consumption of the cylinder.

10. The method of one claim 3, further comprising:

calculating a P-V diagram for the cylinder.

11. The method of claim 3, further comprising:

calculating a temperature change across at least one valve of the cylinder.