1 / 18

Analysis of Engine Performance

Analysis of Engine Performance. P M V Subbarao Professor Mechanical Engineering Department. How to Achieve higher Performance?. James Watts Solution. Cycle Performance Parameters. Net Work Transfer :. This is work done by working fluid on the piston, also called as Indicated Work.

mschoenberger
Download Presentation

Analysis of Engine Performance

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. Analysis of Engine Performance P M V Subbarao Professor Mechanical Engineering Department How to Achieve higher Performance?

  2. James Watts Solution

  3. Cycle Performance Parameters Net Work Transfer : This is work done by working fluid on the piston, also called as Indicated Work. Indicative Performance:

  4. I.C. Engine Test Rig

  5. Specific Fuel Consumption Fuel consumption of an engine reported in L/h or kg/h because these values ignore engine power. A better measure of fuel consumption is, • XSFC – specific fuel consumption (kg/kWh). • X must always be specified when reporting these values (i.e., I for indicated)

  6. Specific Fuel Consumption Variations • ISFC – indicated specific fuel consumption • BSFC - brake specific fuel consumption • PSFC – PTO specific fuel consumption • DSFC – drawbar specific fuel consumption

  7. Parameters for Performance Diagnosis Indicative Mean Effective Pressure: Actual Fuel- Air Ratio : Stoichiometric Fuel- Air Ratio : Fuel Air Equivalence Ratio:

  8. Selection of Mixture Strength for Better Reaction -1 Air-standard Analysis Fuel-Air Analysis Experimental Results Rich Lean

  9. Selection of Sufficient Air : Optimization of Total Cost

  10. Combined Thermodynamic & Chemical Optimization for Better Reaction -2 r = 8 r = 10

  11. Combined Thermodynamic & Kinetic Optimization for Better Reaction -2

  12. Engine Capacity Vs Performance

  13. Optimizing Engine Performance • Engines are most efficient at or near peak load. • Efficiency drops with a reduction in torque load. • At zero brake torque, all fuel energy is expended in engine friction. • Lower rated engine speeds provide lower BSFC, and at the same time reduce torque reserve – design compromise. • Heavy engines for a given capacity….. More inertial losses… • Compromise – Necessary Evil ….. • Any alternate to overcome this fact….. • Develop an idea to Change natural behaviour…..

  14. Artificial Breathing Attachments to Engines Preferred Artificial Breathing ….

  15. Engine Artificial Respiratory System An Inclusion of A Pure CV Super Charged Engine

  16. Turbo Charging of Engine : An Inclusion of two PURE CVs Turbo-Charged Engine

  17. Artificially Aspirated Engines

  18. Characteristics of Artificially Charged Engines

More Related