Diesel Cycle Efficiency Calculator
Ideal constantγDiesel cycle efficiency,1<cutoff≤compression ratio,γ>1; not actual engine outcome or variable-temperature heat capacity. Actual independently established compatible SI units/model context; conditional arithmetic, not code compliance, engineering design or safe operation approval.
Description
Ideal Diesel-cycle efficiency depends on compression, cutoff and a fixed heat-capacity ratio.
Ideal Diesel-cycle efficiency depends on compression, cutoff and a fixed heat-capacity ratio.1
This tool evaluates the restricted air-standard model without predicting an actual engine's performance.
When to use Diesel Cycle Efficiency Calculator
Use this tool to evaluate the restricted air-standard model without predicting an actual engine's performance.
How to use Diesel Cycle Efficiency Calculator and how it works
- Prepare compressionRatio, cutoffRatio, heatCapacityRatio, with the units, conventions and assumptions below.
- Enter the required fields and run Diesel Cycle Efficiency Calculator.
- Read result.value using the output definitions below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| compressionRatio | Compression Ratio. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| cutoffRatio | Cutoff Ratio. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
| heatCapacityRatio | Heat Capacity Ratio. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Supply positive compression and cutoff ratios and a specific-heat ratio gamma>1. Require cutoff>1 and cutoff<=compression, then evaluate the ideal constant-specific-heat Diesel-cycle expression. Actual combustion, heat loss and component efficiencies are not modeled.
efficiency=1-(cutoffRatio^gamma-1)/(gamma*(cutoffRatio-1)*compressionRatio^(gamma-1)) Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Dimensionless ideal-cycle efficiency. | number |
{
"input": {
"compressionRatio": 4,
"cutoffRatio": 2,
"heatCapacityRatio": 2
},
"output": {
"result": {
"value": 0.625
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Turbine Work Calculator for a complementary operation: Steady turbine power can be estimated from mass flow and a signed specific-enthalpy drop under a restricted energy balance.
Use Compressor Power Calculator for a complementary operation: A restricted adiabatic compressor balance uses mass flow, matched heat capacity and observed temperature rise.
References
-
Diesel Cycle Efficiency Calculator — tool.io
Similar or alternative tools
- Turbine Work Calculator
Steady turbine power can be estimated from mass flow and a signed specific-enthalpy drop under a restricted energy balance.
- Compressor Power Calculator
A restricted adiabatic compressor balance uses mass flow, matched heat capacity and observed temperature rise.