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Plant Engineering Calculator

Chiller Annual Energy Cost Calculator — Tons, kW/ton, kWh & Spend

Annualize chiller compressor energy and electricity cost from refrigeration tons, measured or rated kW/ton, operating hours and tariff.

Inputs

Results

Chiller power 300.00 kW
COP 5.86
Annual energy 1200000 kWh
Annual cost $120000
Cost per ton-hour $0.0600

Formula

P=tons×kW/ton; E=P×hours; cost=E×tariff.

Worked example

A 500 ton chiller at 0.60 kW/ton draws 300 kW; at 4,000 equivalent hours that is 1.2 GWh before tariff pricing.

Assumptions & limits

  • Use equivalent operating hours or a load-weighted efficiency for seasonal estimates.
  • This excludes chilled/condenser pumps and tower fans unless their power is added separately.

FAQs

What does this Chiller Annual Energy Cost Calculator calculate?

Annualize chiller compressor energy and electricity cost from refrigeration tons, measured or rated kW/ton, operating hours and tariff.

What should I verify before using the result?

Check units, operating point, measured site data and OEM limits. This calculator is a transparent screening tool, not a substitute for equipment selection or code-required design.

Why are intermediate results included?

Intermediate values expose the engineering chain so you can audit assumptions, compare scenarios and catch unrealistic inputs.

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chiller kw per tonchiller plant efficiencychiller iplv nplv

Last updated: 2026-09-17