Quick Answer
Calculate Turbine Isentropic Expansion Line Deviation Index
Calculator
Result Interpretation
Turbine Isentropic Expansion Line Deviation Index Calculator computes Expansion line deviation in 1 using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Inlet specific enthalpy = 3400000
- Isentropic efficiency = 0.85
- Isentropic outlet specific enthalpy = 2300000
- Actual outlet specific enthalpy = 2450000
Expected Result:
- Expansion line deviation = 0.013636363636364
Engineering Interpretation:
Under the given input conditions, the calculated result is: Expansion line deviation = 0.013636363636364.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
expansion line deviation = abs((inlet specific enthalpy - actual outlet specific enthalpy) - isentropic efficiency * (inlet specific enthalpy - isentropic outlet specific enthalpy)) / (inlet specific enthalpy - isentropic outlet specific enthalpy)Formula family: formula_power_turbine_expansion_line_deviation_analyzer
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| h_in | Inlet specific enthalpy | INPUT | Inlet specific enthalpy |
| h_out_actual | Actual outlet specific enthalpy | INPUT | Actual outlet specific enthalpy |
| h_out_isen | Isentropic outlet specific enthalpy | INPUT | Isentropic outlet specific enthalpy |
| eta_isen | Isentropic efficiency | INPUT | Isentropic efficiency |
| expansion_line_deviation | Expansion line deviation | OUTPUT | Expansion line deviation |
Calculation Steps
- Enter the inlet specific enthalpy in J/kg.
- Enter the actual outlet specific enthalpy in J/kg.
- Enter the isentropic outlet specific enthalpy in J/kg.
- Enter the isentropic efficiency in 1.
- Step 1: Compute expansion line deviation.
- Read the expansion line deviation (1) from the results.
Engineering Summary
Calculate Turbine Isentropic Expansion Line Deviation Index
Frequently Asked Questions
What does this calculator calculate?
The Turbine Isentropic Expansion Line Deviation Index Calculator estimates Expansion line deviation based on the input parameters you provide
Why is inlet specific enthalpy important in this calculation?
inlet specific enthalpy is inversely proportional to expansion line deviation. When you enter inlet specific enthalpy in J/kg, the calculator uses it in the engineering formula to compute the output
How should I interpret the result expansion line deviation?
The calculator outputs expansion line deviation. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Inlet specific enthalpy (J/kg), Actual outlet specific enthalpy (J/kg), Isentropic outlet specific enthalpy (J/kg). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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