Cold Storage Energy & What It Costs to Run

Input power = cooling load (tons of refrigeration × 3.517 kW) ÷ the COP. Daily kWh = input power × run hours per day; period kWh scales that over the days you run; and the cost = kWh × your electricity tariff. This tool chains all four steps and works in 8 currencies.

A ton of refrigeration (TR) is a unit of cooling capacity equal to about 3.517 kW — historically the heat needed to melt one short ton of ice in 24 hours. Cold-store plant is rated in tons of refrigeration, so the cooling load in TR times 3.517 gives the cooling duty in kilowatts.

The Coefficient of Performance is the cooling delivered per unit of electrical power consumed — a COP of 3 means 3 kW of cooling for every 1 kW drawn. A higher COP means the compressor does the same cooling for less electricity, so input power = cooling load ÷ COP and the running cost falls as COP rises.

The cooling load is the total heat the store must remove — from the produce, respiration, the building fabric, air changes, lights and fans. A cold-room cooling-load calculator estimates it in tons of refrigeration or kW; enter that figure here to turn the load into electricity and cost.

Because of the COP. A refrigeration plant moves more heat than the electrical energy it consumes, so for a COP above 1 the electrical input power is less than the cooling duty. Dividing the cooling load by the COP gives the actual electrical draw the meter sees.

Improve insulation and door discipline to lower the cooling load, maintain the plant for a higher COP, run during off-peak tariff windows, fit variable-speed compressors and good condenser cooling, and avoid loading warm produce. Each lever shows up in this tool as a lower load, higher COP, fewer hours or cheaper tariff.

Yes — hotter weather raises the heat leaking into the store and makes the condenser work harder, lifting both the cooling load and lowering the effective COP, so summer running costs are higher. Re-estimate the load and COP for peak conditions to budget for the worst case.

Yes — the physics (TR × 3.517 ÷ COP × hours × tariff) is universal. It suits a small cold room, a packhouse or a large cold-storage facility; just enter your cooling load, COP, hours and local tariff, and choose your currency to get the cost in your money.

They are solid estimates. Real consumption varies with weather, load patterns, defrost cycles, part-load efficiency and metering. Use measured plant COP and your actual tariff, re-run for peak conditions, and treat the result as a planning and budgeting figure rather than a guaranteed bill.