1 / 29

Compressors & Drivers

Compressors & Drivers. Compressor. Types Dynamic Centrifugal Ejector Displacement Positive Diplacement Issues Control Seals. MOTIVE FLUID. DISCHARGE. SUCTION. Axial. SUCTION. DISCHARGE. ESTIMATOR CHOICES. Selection Chart. ESTIMATOR - Compressor Input. Fluid Power Calculation.

dylan-slater
Download Presentation

Compressors & Drivers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Compressors & Drivers

  2. Compressor • Types • Dynamic • Centrifugal • Ejector • Displacement • Positive Diplacement • Issues • Control • Seals

  3. MOTIVE FLUID DISCHARGE SUCTION

  4. Axial

  5. SUCTION DISCHARGE

  6. ESTIMATOR CHOICES

  7. Selection Chart

  8. ESTIMATOR - Compressor Input

  9. Fluid Power Calculation • Fluid Static Head -> approx. 0 • Include Piping Frictional Losses of 10 psi per segment between equipment. • Exchanger Losses per simulation assumptions • Control Valve losses (15 psi for our 500 psig system - but eliminate if possible?). • Fluid Flow • Efficiency (75% to 80%)

  10. PRO II Output Seals Normally Limited to 350 °F (180 °C)

  11. Compression Ratio • P2 / P1 (absolute pressures) • Not required in our calcs for cost but if excessive are an indication that a multistage compressor would be required (usually confirmed by outlet temperature).

  12. Centrifugal Compressors and Fans Performance & Controls Diff Press Okay Surge Inlet Volumetric Flow Rate

  13. For constant discharge pressure systems (most common). Variations in process flow rate are controlled through the “inlet valve” Centrifugal - Control Inlet Vane Changes The Flow vs DP Curve of the Compressor

  14. Centrifugal - Control Surge Line Diff Press Open Inlet Valve Closing Inlet Valve Inlet Volumetric Flow Rate

  15. Centrifugal - Control • At the point where further restriction in the inlet valve would cause surging other controls are required. • Usually • Blow Off • Recirculation

  16. Centrifugal - Control • Blow Off Blow Off Inlet Blow Off Valve Disch

  17. Centrifugal - Control • Recirculation Inlet Disch

  18. Centrifugal - Control • Variable Speed • Used on the smaller compressors for energy efficiency Diff Press High RPM Low RPM Inlet Volumetric Flow Rate

  19. Drives For Pumps and Compressors

  20. Drives For Pumps and Compressors T.E.F.C.

  21. TEFC Air Flow seal bearing

  22. Enclosures “protected” from outside environment allows free ambient room air to cool windings drip proof guarded weather protected “Totally Enclosed Fan Cooled” TEFC most common motor used - isolated from the free exchange of outside air Explosion Proof - designed to isolate surroundings from ignition sources such as sparking or high temperatures inside the motor Electric Drives

  23. Performed by electrical and process engineers Process of classification identifies processes that have explosion potential flammable liquids, gases, vapors, combustible dust, or ignitable fibers or flyings based on flash point, operating temperature etc. Identifies distances from process that are ‘safe’ identifies equipment and instrumentation enclosure requirements i.e. Explosion proof Electrical Area Classification

  24. Our Compressor • What composition we have going through compressor? • Is the material a fire/explosion hazard (operated above it’s flash point) ? • Do we have an explosion potential if it leaks out of compressor? • What drive type should we choose?

More Related