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Chiller Plant Sequence Simulator

2-Chiller Plant · Staging Logic · kW/ton Efficiency

When to use: Simulate a commercial chiller plant with two 300-ton chillers, a cooling tower, and primary/secondary pumping. Vary building load from 0–100% and watch the sequencing logic stage chillers on/off to optimize efficiency. Track kW/ton plant efficiency in real time.

Building Cooling Load60% — 360 tons
Plant Schematic
🌀
Cooling Tower
Approach: 10°F
ON
→
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Chiller #1
270 tons
151 kW
0.56 kW/ton
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Chiller #2
90 tons
70 kW
0.78 kW/ton
→
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Primary CHW Pump
432 GPM
ON
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Secondary CHW Pump
864 GPM
ON
→
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Building Load
360 tons
60% load
CHW Supply
44.2
°F
CHW Return
56.4
°F
ΔT
12.2
°F
Flow Rate
864
GPM
Plant kW/ton
0.72
kW/ton
Total kW
260
kW
Plant Efficiency History — kW/ton vs Load
Sequencing Logic
0%
All equipment OFF
1–85% capacity
Chiller #1 only
85–100% capacity
Both chillers ON
Any load {">"} 0
CT + Pumps ON