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Specifications
Single Circuit v. Dual Circuit – which is the best Dual Compressor Chiller for your project?
Model WDC – Single Circuit Model WCC – Dual Circuit Overall lowest energy consumption with best part load performance Lowest kW per ton performance at full load Smaller chilled water plant where unit unloading is expected Large central plant where cycling chillers for system capacity reduction is expected (three or more chillers) Floor space is limited (16-foot vessel length compared to 20-foot for a WCC unit) High chilled water delta-T, and single water pass, low water pressure drops Two or three pass vessels are required, typical of retrofit applications Built-in redundancy—a single compressor will provide 50% of full load capacity Built-in redundancy—a single compressor will provide 60% of full load capacity High efficiency and large capacity with series flow
Single Circuit, WDC Chillers have a single-refrigerant circuit for the evaporator and condenser with two compressors running in parallel and are available in one, two or three-pass configurations. Their salient feature is that at single-compressor, part load operation, the running compressor can utilize the entire chiller’s heat transfer surface, providing outstanding part load performance.
Single Circuit v. Dual Circuit – which is the best Dual Compressor Chiller for your project?
| Model WDC – Single Circuit | Model WCC – Dual Circuit |
|---|---|
| Overall lowest energy consumption with best part load performance | Lowest kW per ton performance at full load |
| Smaller chilled water plant where unit unloading is expected | Large central plant where cycling chillers for system capacity reduction is expected (three or more chillers) |
| Floor space is limited (16-foot vessel length compared to 20-foot for a WCC unit) | High chilled water delta-T, and single water pass, low water pressure drops |
| Two or three pass vessels are required, typical of retrofit applications | Built-in redundancy—a single compressor will provide 50% of full load capacity |
| Built-in redundancy—a single compressor will provide 60% of full load capacity | High efficiency and large capacity with series flow |
Single Circuit, WDC Chillers have a single-refrigerant circuit for the evaporator and condenser with two compressors running in parallel and are available in one, two or three-pass configurations. Their salient feature is that at single-compressor, part load operation, the running compressor can utilize the entire chiller’s heat transfer surface, providing outstanding part load performance.
- Daikin dual compressor centrifugal chillers take up less floor space than multiple single compressor chillers while delivering the combined capacity. A dual compressor chiller can also provide installed costs savings of up to 35% compared to installing two separate chillers. Here's why:
- Eliminates piping to the second chiller and to additional pumps
- Fewer valves and controls
- Less rigging costs
- Reduced control wiring
Daikin dual compressor centrifugal chillers take up less floor space than multiple single compressor chillers while delivering the combined capacity. A dual compressor chiller can also provide installed costs savings of up to 35% compared to installing two separate chillers. Here's why:- Eliminates piping to the second chiller and to additional pumps
- Fewer valves and controls
- Less rigging costs
- Reduced control wiring
The redundancy of two of everything connected to the evaporator and condenser enhances reliability. If any compressor component fails, it can be removed or repaired without shutting down the other compressor. And there's automatic back-up with at least 60% of the chiller design capacity available on single circuit units and 50% on dual circuit units. Daikin dual compressor centrifugal chillers are seismic compliant with both IBC standards and OSHPD pre-approval.
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