What Are the Cp and Cv Values for Petrol and Air?

Click For Summary
SUMMARY

The Cp (specific heat at constant pressure) and Cv (specific heat at constant volume) values for petrol and air are critical for thermodynamic calculations. The discussion highlights the importance of the fuel-air ratio and the specific blend of petrol in determining these values. For accurate calculations, the specific heat ratio (gamma) is noted as 1.3 for air. The conversation emphasizes the necessity of using precise values for effective thermodynamic analysis.

PREREQUISITES
  • Understanding of thermodynamics principles
  • Familiarity with specific heat concepts
  • Knowledge of fuel-air ratios
  • Basic proficiency in using engineering tools for calculations
NEXT STEPS
  • Research the specific heat values of various petrol blends
  • Learn how to calculate specific heat ratios in thermodynamic systems
  • Explore the impact of fuel-air ratios on combustion efficiency
  • Investigate the use of engineering tools like Engineering Toolbox for fluid properties
USEFUL FOR

Engineers, thermodynamics students, and professionals involved in combustion analysis and fuel efficiency optimization will benefit from this discussion.

chhitiz
Messages
221
Reaction score
0
what are the Cp and Cv values of petrol and air?
 
Engineering news on Phys.org
Use gamma = 1.3 for the polytropic constant.

Note: If you aren't using the cp and cv values to find this, ignore the above. If you are congratulate me for being clairvoyant.
EDIT: It also depends on the blend of petrol and the fuel to air ratio (if you want to get technical and accurate)
 
Gee thanks! but that's only the Cp value. what about the Cv value?
and yes i have to calculate specific heat ratio
 

Similar threads

Automotive What does the smoke color means in diesel car and petrol car?
  • · Replies 10 ·
Replies
10
Views
2K
Automotive Air fuel ratio effects in diesel vs. petrol engines
  • · Replies 11 ·
Replies
11
Views
23K
Heat cross exchanger
  • · Replies 3 ·
Replies
3
Views
3K
Does a "heat pump" not spew HFCs like an "air conditioner"?
  • · Replies 7 ·
Replies
7
Views
2K
Chosing air blowers to force air through a solar heat storage array
  • · Replies 2 ·
Replies
2
Views
1K
Heat circle -- Calculating the air flow needed across a condenser
  • · Replies 3 ·
Replies
3
Views
2K
Calculating heat recovery from engine exhaust gases
  • · Replies 2 ·
Replies
2
Views
3K
Specific heat in for the Otto cycle
  • · Replies 1 ·
Replies
1
Views
2K
Calculating the air venting flow rate needed during CIP of a tank
  • · Replies 5 ·
Replies
5
Views
2K
Heat in a const. pressure/volume calculation
  • · Replies 40 ·
2
Replies
40
Views
5K