Chiller Part-Load Calculator
Actual part-load energy profile COP with unequal run exposures, not arithmetic meanCOP or instantaneous chillerCOP. 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
Chiller performance over intervals can be summarized by cooling energy divided by electrical energy.
Chiller performance over intervals can be summarized by cooling energy divided by electrical energy.1
An energy-weighted COP differs from an unweighted average of instantaneous COP values. Use this tool to calculate chiller Part-Load from the supplied measurements and assumptions.
When to use Chiller Part-Load Calculator
Use this tool to calculate chiller Part-Load 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 Chiller Part-Load 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 callerMatchedChillerLoadsKw, observedElectricalPowersKw, observedRunHours, using the field meanings and rules below, then run the tool.
- Read intervalChillerCoolingKwh, intervalChillerElectricKwh, energyWeightedPartLoadCop. 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 |
|---|---|---|---|
| callerMatchedChillerLoadsKw | Caller matched chiller loads kw | list of number | Required |
| observedElectricalPowersKw | Observed electrical powers kw | list of number | Required |
| observedRunHours | Observed run hours | list of number | Required |
Enter nonempty aligned nonnegative cooling loads in kW, positive electrical powers in kW and positive run durations in hours. Sum load×hours and power×hours to energies in kWh. Return both totals and coolingEnergy/electricEnergy; this is not an arithmetic mean of interval COPs.
energyWeightedCOP=ΣcoolingKw_i×hours_i/ΣelectricalKw_i×hours_i Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| intervalChillerCoolingKwh | Interval Chiller Cooling Kwh; follow the units, sign, ordering and evidence convention stated above | number |
| intervalChillerElectricKwh | Interval Chiller Electric Kwh; follow the units, sign, ordering and evidence convention stated above | number |
| energyWeightedPartLoadCop | Energy Weighted Part Load Cop; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"callerMatchedChillerLoadsKw": [
10,
20
],
"observedElectricalPowersKw": [
2,
5
],
"observedRunHours": [
1,
2
]
},
"output": {
"intervalChillerCoolingKwh": 50,
"intervalChillerElectricKwh": 12,
"energyWeightedPartLoadCop": 4.166666666666667
}
}Limitations and assumptions
An energy-weighted COP differs from an unweighted average of instantaneous COP values. 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 Heat Recovery Effectiveness Calculator for this related task: Heat-recovery effectiveness compares recovered heat with a capacity-limited inlet driving potential.
Use Rankine Cycle Efficiency Calculator when its separate inputs and assumptions fit the question: A Rankine-cycle energy balance compares turbine work, pump work and heat input.
References
-
Chiller Part-Load Calculator — tool.io
Similar or alternative tools
- Heat Recovery Effectiveness Calculator
Heat-recovery effectiveness compares recovered heat with a capacity-limited inlet driving potential.
- Rankine Cycle Efficiency Calculator
A Rankine-cycle energy balance compares turbine work, pump work and heat input.