Cooling plant case
Solar manufacturing cooling plant
A large industrial plant with low-temperature chillers, heat-recovery chillers, cooling towers, pumps, and plate heat exchangers was evaluated through comparable operating days.
- Average savings
- 21.29%
- 20-day comparable result
- 24.51%
- Cooling towers
- 17
Average result across the comparable-day review.
Reported savings rate over the 20 operating-day comparison.
Large parallel condenser-side equipment scope.
Plant profile
Large industrial cooling plant with heat recovery
The system combined five low-temperature chillers, four heat-recovery centrifugal chillers, seventeen cooling towers, nine chilled-water pumps, nine condenser-water pumps, four heat-recovery pumps, four medium-temperature circulation pumps, and four plate heat exchangers.
Equipment
Major equipment
The plant used one-to-one chiller and pump pairing for chilled and condenser water, with parallel heat-recovery pumps and parallel cooling towers.
| Equipment | Quantity | Specification | Status |
|---|---|---|---|
| Centrifugal chillers | 3 | 8791 kW cooling capacity / 1527 kW power / 0.61 kW/ton rated efficiency / Two fixed-speed, one variable-speed | - |
| Centrifugal chiller | 1 | 7032 kW cooling capacity / 1229 kW power / 0.61 kW/ton rated efficiency | - |
| Centrifugal chiller | 1 | 4220 kW cooling capacity / 725.2 kW power / 0.60 kW/ton rated efficiency | - |
| Heat-recovery centrifugal chillers | 4 | 8791 kW cooling capacity / 1464 kW cooling power / 10253 kW heating capacity / 0.59 kW/ton cooling / 0.59 kW/ton heating rated efficiency | - |
| Chilled-water pumps | 7 | 1410 m³/h flow / 47.5 m head / 250 kW / Integrated VFD | - |
| Chilled-water pump | 1 | 1200 m³/h flow / 50 m head / 220 kW / Integrated VFD | - |
| Chilled-water pump | 1 | 720 m³/h flow / 50 m head / 160 kW / Integrated VFD | - |
| Heat-recovery pumps | 4 | 1410 m³/h flow / 47.5 m head / 250 kW / Integrated VFD | - |
| Medium-temperature circulation pumps | 4 | 650 m³/h flow / 48 m head / 132 kW / Integrated VFD | - |
| Cooling towers | 17 | Dual-speed fan / 30 kW / 22 kW | - |
| Condenser-water pumps | 9 | 1900 m³/h flow / 28 m head / 185 kW / Integrated VFD | - |
Evaluation scope
- Comparison method
- Comparable-day analysis.
- Matching variables
- Average dry-bulb temperature, average wet-bulb temperature, production output, and average load.
- Operating window
- Twenty operating days were included in the comparable-day review.
Calculation detail
- Comparable-day basis
- Days matched by weather, production output, and average load.
- 20-day savings rate
- 24.51%
- Average savings
- 21.29%
Case result
20-day comparable-day savings rate = 24.51%; average savings = 21.29%.
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