Rankine Cycle Efficiency Calculator
Four independently established single-loop Rankine state enthalpies, no steam properties/EOS, regenerative/reheat or ideal efficiency implied. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.
Description
A Rankine-cycle energy balance compares turbine work, pump work and heat input.
A Rankine-cycle energy balance compares turbine work, pump work and heat input.1
Enthalpies must represent a consistent cycle rather than values drawn from unrelated states. Use this tool to calculate rankine Cycle Efficiency from the supplied measurements and assumptions.
When to use Rankine Cycle Efficiency Calculator
Use this tool to calculate rankine Cycle Efficiency from the supplied measurements and assumptions. Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
How to use Rankine Cycle Efficiency Calculator and understand its results
- Establish the SI units or caller unit basis, load signs, measurement interval, model conditions and independently chosen coefficients or references.
- Enter turbineInletEnthalpyJKg, turbineExitEnthalpyJKg, pumpInletEnthalpyJKg, pumpExitEnthalpyJKg, using the field meanings and rules below, then run the tool.
- Read rankineNetSpecificWorkJKg, rankineHeatInputJKg, rankineCycleEfficiency. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| turbineInletEnthalpyJKg | Turbine inlet enthalpy j kg | number | Required |
| turbineExitEnthalpyJKg | Turbine exit enthalpy j kg | number | Required |
| pumpInletEnthalpyJKg | Pump inlet enthalpy j kg | number | Required |
| pumpExitEnthalpyJKg | Pump exit enthalpy j kg | number | Required |
Enter finite matched turbine-inlet/outlet and pump-inlet/outlet enthalpies. Require nonnegative turbine work and pump work and positive heat input. Return (turbineWork−pumpWork)/heatInput; negative net work and efficiency are allowed and efficiency is not clamped to [0,1]. No state-property lookup or cycle-validity check is supplied.
wt=hTurbineIn−hTurbineOut; wp=hPumpOut−hPumpIn; qIn=hTurbineIn−hPumpOut; eta=(wt−wp)/qIn Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| rankineNetSpecificWorkJKg | Rankine Net Specific Work J Kg; follow the units, sign, ordering and evidence convention stated above | number |
| rankineHeatInputJKg | Rankine Heat Input J Kg; follow the units, sign, ordering and evidence convention stated above | number |
| rankineCycleEfficiency | Rankine Cycle Efficiency; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"turbineInletEnthalpyJKg": 100,
"turbineExitEnthalpyJKg": 60,
"pumpInletEnthalpyJKg": 20,
"pumpExitEnthalpyJKg": 25
},
"output": {
"rankineNetSpecificWorkJKg": 35,
"rankineHeatInputJKg": 75,
"rankineCycleEfficiency": 0.4666666666666667
}
}Limitations and assumptions
Enthalpies must represent a consistent cycle rather than values drawn from unrelated states. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Steam Specific Enthalpy Approx Calculator for this related task: Steam enthalpy depends on state and the adopted thermodynamic relation.
Use Chiller Part-Load Calculator when its separate inputs and assumptions fit the question: Chiller performance over intervals can be summarized by cooling energy divided by electrical energy.
References
-
Rankine Cycle Efficiency Calculator — tool.io
Similar or alternative tools
- Steam Specific Enthalpy Approx Calculator
Steam enthalpy depends on state and the adopted thermodynamic relation.
- Chiller Part-Load Calculator
Chiller performance over intervals can be summarized by cooling energy divided by electrical energy.