Reciprocating Compressors›P-V Diagram
📊

P-V Diagram Analysis

Pressure-Volume Cycle Visualization & Work Calculation

P-V Diagram Analysis
Visualize the reciprocating compressor cycle showing compression, discharge, expansion, and suction events. Calculate theoretical work and analyze volumetric efficiency.

Operating Pressures

psia
psia

Cylinder Geometry

inches
inches
%
Typical: 10-25%

Gas Properties

-

Compression Cycle Events

  1. 1→2 Compression: Gas compressed from suction to discharge pressure (adiabatic or polytropic)
  2. 2→3 Discharge: Discharge valve opens, gas expelled at constant pressure
  3. 3→4 Expansion: Trapped clearance gas expands as piston reverses
  4. 4→1 Suction: Suction valve opens, cylinder fills with new gas

Learn the Theory

Understand P-V diagram interpretation and analysis

Read Engineering Guide

P-V Diagram Uses

  • Diagnose valve problems
  • Detect ring leakage
  • Verify clearance settings
  • Calculate indicated horsepower
  • Identify pulsation issues

Related Calculators

📉

Volumetric Efficiency

Calculate VE from clearance
⚖️

Rod Load Analysis

Tension and compression loads
🌡️

Discharge Temperature

Temperature rise prediction
📈

Compression Ratio

Staging optimization