Rack Optimization – Job Walk Calculator
Estimate compressor savings from floating suction (ΔSST↑) and floating head (ΔSCT↓). Simple, accurate, and conservative.Branding & coefficients
Enter per-compressor amps; override PF/hours if different from defaults.
| # | Amps | PF (opt) | Hours/day (opt) | kW (calc) | Actions |
|---|
If no measured peak, we estimate from top-N compressor kW.
Seasonal profile (optional, for floating with ambient)
Enter up to three bins. Savings% is weighted by % of hours.
| Label | % of hours | ΔSST (°F) | ΔSCT↓ (°F) |
|---|---|---|---|
If all % are blank, we use the **Average ΔSST/ΔSCT** above.
Optional: Discrete staging bonus (drop a compressor)
We compare **average kW reduction** (Rack kW × Savings%) to Stage kW. If ≥ Stage kW, we count ⌊reduction/Stage kW⌋ stages off during eligible hours.
Rules of thumb: suction ≈ 1.7%/°F (use 1.5 if unsure), head ≈ 2.0%/°F. Use the staging bonus only when you’re confident a stage will drop for meaningful hours.