Calculation method
- 1. Seasonal COP = application COP (3.1 chilled · 1.9 frozen · 1.4 blast) ÷ climate penalty (CO₂ 0.94–1.24 · NH₃ 1.00–1.06)
- 2. Compressor power (kW) = refrigeration duty ÷ COP
- 3. Annual energy = compressor kW × run hours × tariff
- 4. Maintenance = capex × 3.5% (CO₂) or 4.5% (NH₃)
- 5. 10-year TCO = capex + 10 × (energy + maintenance)
Berekend in kW. Imperiale eenheden: 1 kW = 3,412 BTU/h = 0.284 TR; compressor-asvermogen 1 kW = 1.34 hp.

