Compression or Expansion Ratio Solution

STEP 0: Pre-Calculation Summary
Formula Used
Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression
rp = P2/P1
This formula uses 3 Variables
Variables Used
Compression or Expansion Ratio - Compression or Expansion Ratio for known pressures.
Pressure at End of Isentropic Compression - (Measured in Pascal) - The Pressure at End of Isentropic Compression is the intermediate pressure in the cycle from where isobaric cooling starts.
Pressure at the start of Isentropic Compression - (Measured in Pascal) - The Pressure at the start of Isentropic Compression is the pressure at which the cycle starts.
STEP 1: Convert Input(s) to Base Unit
Pressure at End of Isentropic Compression: 10 Bar --> 1000000 Pascal (Check conversion here)
Pressure at the start of Isentropic Compression: 4 Bar --> 400000 Pascal (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
rp = P2/P1 --> 1000000/400000
Evaluating ... ...
rp = 2.5
STEP 3: Convert Result to Output's Unit
2.5 --> No Conversion Required
2.5 <-- Compression or Expansion Ratio
(Calculation completed in 00.012 seconds)
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Credits

Created by Rushi Shah
K J Somaiya College of Engineering (K J Somaiya), Mumbai
Rushi Shah has created this Calculator and 25+ more calculators!
Verified by Mayank Tayal
National Institute of Technology (NIT), Durgapur
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< 5 Bell-Coleman Cycle or Reversed Brayton or Joule Cycle Calculators

COP of Bell-Coleman Cycle for given temperatures, polytropic index and adiabatic index
Theoretical Coefficient of Performance = (Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion)/((Polytropic Index/(Polytropic Index-1))*((Heat Capacity Ratio-1)/Heat Capacity Ratio)*((Ideal temp at end of isentropic compression-Ideal temp at the end of isobaric cooling)-(Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion))) Go
Heat Absorbed during Constant pressure Expansion Process
Heat Absorbed = Specific Heat Capacity at Constant Pressure*(Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion) Go
Heat Rejected during Constant pressure Cooling Process
Heat Rejected = Specific Heat Capacity at Constant Pressure*(Ideal temp at end of isentropic compression-Ideal temp at the end of isobaric cooling) Go
COP of Bell-Coleman Cycle for given Compression ratio and adiabatic index
Theoretical Coefficient of Performance = 1/(Compression or Expansion Ratio^((Heat Capacity Ratio-1)/Heat Capacity Ratio)-1) Go
Compression or Expansion Ratio
Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression Go

< 5 Bell-Coleman Cycle or Reversed Brayton or Joule Cycle Calculators

COP of Bell-Coleman Cycle for given temperatures, polytropic index and adiabatic index
Theoretical Coefficient of Performance = (Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion)/((Polytropic Index/(Polytropic Index-1))*((Heat Capacity Ratio-1)/Heat Capacity Ratio)*((Ideal temp at end of isentropic compression-Ideal temp at the end of isobaric cooling)-(Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion))) Go
Heat Absorbed during Constant pressure Expansion Process
Heat Absorbed = Specific Heat Capacity at Constant Pressure*(Temperature at the start of Isentropic Compression-Temperature at the end of Isentropic Expansion) Go
Heat Rejected during Constant pressure Cooling Process
Heat Rejected = Specific Heat Capacity at Constant Pressure*(Ideal temp at end of isentropic compression-Ideal temp at the end of isobaric cooling) Go
COP of Bell-Coleman Cycle for given Compression ratio and adiabatic index
Theoretical Coefficient of Performance = 1/(Compression or Expansion Ratio^((Heat Capacity Ratio-1)/Heat Capacity Ratio)-1) Go
Compression or Expansion Ratio
Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression Go

Compression or Expansion Ratio Formula

Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression
rp = P2/P1

What is compression or expansion ratio?

The Compression or Expansion Ratio formula is defined as the ratio of the final and the initial pressures of any process.

How to Calculate Compression or Expansion Ratio?

Compression or Expansion Ratio calculator uses Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression to calculate the Compression or Expansion Ratio, The Compression or Expansion Ratio formula is defined as the ratio of the final pressure and the initial pressure of any process. Compression or Expansion Ratio is denoted by rp symbol.

How to calculate Compression or Expansion Ratio using this online calculator? To use this online calculator for Compression or Expansion Ratio, enter Pressure at End of Isentropic Compression (P2) & Pressure at the start of Isentropic Compression (P1) and hit the calculate button. Here is how the Compression or Expansion Ratio calculation can be explained with given input values -> 2.5 = 1000000/400000.

FAQ

What is Compression or Expansion Ratio?
The Compression or Expansion Ratio formula is defined as the ratio of the final pressure and the initial pressure of any process and is represented as rp = P2/P1 or Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression. The Pressure at End of Isentropic Compression is the intermediate pressure in the cycle from where isobaric cooling starts & The Pressure at the start of Isentropic Compression is the pressure at which the cycle starts.
How to calculate Compression or Expansion Ratio?
The Compression or Expansion Ratio formula is defined as the ratio of the final pressure and the initial pressure of any process is calculated using Compression or Expansion Ratio = Pressure at End of Isentropic Compression/Pressure at the start of Isentropic Compression. To calculate Compression or Expansion Ratio, you need Pressure at End of Isentropic Compression (P2) & Pressure at the start of Isentropic Compression (P1). With our tool, you need to enter the respective value for Pressure at End of Isentropic Compression & Pressure at the start of Isentropic Compression and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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