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eng.chiller-cop-efficiency Calculator
Calculates chiller COP (kW cooling / kW electrical input) at full and part load, and annual energy consumption from operating hours. Modern magnetic bearing centrifugal chillers achieve COP of 7–10 at full load — conventional chillers run 4–6 COP.
Inputs
Cooling Capacity Kw
Maximum throughput or storage. Operating near 100% capacity typically increases failures and wait times.
Power Input Kw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
Entering Water Temp C
Reference formula or conversion factor shown for context.
Leaving Water Temp C
Reference formula or conversion factor shown for context.
Results
COP (coefficient of performance)
The specific form or variant of the result.
EER (BTU/Wh)
Reference formula or conversion factor shown for context.
kW/TR (efficiency metric)
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
cooling tons (TR)
Sample size or count used in the calculation.
ASHRAE 90.1 benchmark
Reference value for comparison — the industry standard, historical average, or target that this result is measured against.