What Is the Thermodynamic Exergy Destruction (Gouy-Stodola) Calculator?
Exergy represents the maximum theoretical useful shaft work obtainable as a system comes into mutual equilibrium with its environment.
Exergy destruction is the permanently lost work capacity caused by thermodynamic irreversibility.
How Does the Thermodynamic Exergy Destruction (Gouy-Stodola) Calculator Work?
Multiplies ambient reference temperature T0 (in Kelvin) by entropy generation rate.
Converts destroyed exergy into kilowatts and mechanical horsepower.
Computes the second-law percentage loss relative to incoming heat input.
Thermodynamic Exergy Destruction (Gouy-Stodola) Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Gouy-Stodola relation linking entropy production to exergy destruction rate.
How to Use the Thermodynamic Exergy Destruction (Gouy-Stodola) Calculator
- Enter the surrounding dead-state ambient temperature in Kelvin.
- Enter the calculated entropy generation rate in kW/K.
- Optionally provide thermal fuel input rate to find percentage loss.
Step-by-Step Example Calculation
Industrial Gas Turbine Combustion Chamber
Input Values:
Understanding Your Result
Exergy destruction pinpoints the exact locations and mechanisms of true thermodynamic inefficiency.
Unlike first-law heat loss, exergy destruction cannot be recovered.
Factors That Affect the Result
- Temperature difference: Heat transfer across large temperature gradients generates massive entropy.
- Fluid friction and throttling: Pressure drops without work extraction destroy exergy directly.
When Should You Use This Calculator?
- Exergoeconomic optimization of power plants, cryogenic refrigerators, and chemical refineries.
- Comparing combustion chambers, heat exchangers, and expanders on a second-law basis.
Assumptions & Limitations
- Assumes constant, uniform ambient dead-state temperature T0.
- Steady-state flow system.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Fundamental theorem of engineering thermodynamics derived from combined 1st and 2nd laws.