GIFSQ Tools · Module 17 — Food Processing, Thermal Engineering & Utilities · Tool 335 of 500
Estimate the refrigeration load for cooling a batch: product cooling load plus transmission and miscellaneous loads, and the energy used over the cooling period.
Try sample values — fills the form with the worked example below.
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Product load (kW)
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Total load (kW)
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Energy (kWh)
Equation: Product load (kW) = mass × cp × |T₁ − T₂| ÷ (cooling time in seconds); total = product + transmission + other loads; energy = total × time.
Method: Standard refrigeration load estimate per the ASHRAE Refrigeration Handbook: product sensible load plus wall transmission and miscellaneous loads.
Assumptions: sensible cooling only (no freezing); specific heat constant; transmission and other loads are steady over the period.
Limitations: freezing adds a large latent load that this tool does not include; transmission should be calculated from wall U-values and areas for a real cold-room design.
Rounding: loads and energy to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Standard refrigeration load estimate per the ASHRAE Refrigeration Handbook: product sensible load plus wall transmission and miscellaneous loads.
Assumptions: sensible cooling only (no freezing); specific heat constant; transmission and other loads are steady over the period.
Limitations: freezing adds a large latent load that this tool does not include; transmission should be calculated from wall U-values and areas for a real cold-room design.
Rounding: loads and energy to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: 1000 kg cooled from 30 °C to 10 °C in 4 h (cp 3.5 kJ/kg·K), transmission 2 kW, other loads 1 kW: product load = 4.86 kW, total = 7.86 kW, energy = 31.44 kWh.
Enter values above to see results.
Allow a safety factor of 10–20% on the total when sizing plant, and size for the peak pull-down load, not the steady holding load. Tool 335 of 500 — GIFSQ
