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Plant Engineering Calculator

Chiller Load Profile Energy Calculator — Bin kWh, Weighted kW/Ton & Cost

Calculate annual chiller energy and load-weighted efficiency from up to four operating bins with load fraction, hours and kW/ton.

Inputs

Results

Annual chiller energy 736250 kWh
Annual ton-hours 1337500 ton-h
Weighted efficiency 0.550 kW/TR
Annual energy cost $73625

Formula

E=Σ(capacity×load fraction×kW/ton×hours); weighted kW/ton=E/Σ(ton-hours).

Worked example

A 500-ton chiller can be modeled across four load bins instead of assuming one full-load efficiency for every hour.

Assumptions & limits

  • Entered bin efficiencies should correspond to the same condenser/chilled-water conditions represented by each bin.
  • This models chiller compressor energy; add pumps and tower fans for whole-plant energy.

FAQs

What does this Chiller Load Profile Energy Calculator calculate?

Calculate annual chiller energy and load-weighted efficiency from up to four operating bins with load fraction, hours and kW/ton.

Which inputs matter most?

Use measured operating data where possible and keep pressure, temperature, flow, efficiency and tariff inputs on the stated basis. Intermediate outputs make the calculation auditable.

Can I use this for final equipment selection?

Use it for engineering screening and scenario comparison. Confirm final selections against OEM curves, steam/property tables, applicable codes and project design conditions.

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Last updated: 2026-09-17