3
ZX Platform – Scroll Superiority
Scroll compressor
s deliver flatter capacity compared to reciprocating compressor condensing units due to the high volumetric efficiency
of scroll compressors. Flatter capacity can otherwise be described as lower change in capacity with change in outdoor ambient. This is
schematically shown in Figure 03. Flatter capacity brings certain inherent advantages, which highly benefit users and stored products.
Some of the benefits of flatter capacity on ZX platform CDUs are described below.
1.
Smaller unit selection:
Condensing units are selected to match the required refrigeration capacity at the highest required
ambient. Flatter capacity allows a smaller unit selection compared to reciprocating compressor CDU.
2.
Lower operating cost:
At lower ambient conditions, ZX platform CDU delivers capacity closer to the cooling load. In
contrast, reciprocating compressor CDU delivers capacity in far excess of what is required. This helps the ZX platform CDU to
operate at relatively higher evaporating temperature. Higher evaporating temperatures improve compressor efficiency. In
addition, higher evaporating temperature reduces the rate of ice formation on the evaporator coils/frost build-up. Lower frost
build-up improves the evaporator heat exchange efficiency. It also reduces the defrost heat demand, thereby resulting in lower energy
needed for defrost.
3.
Freshness of food:
Another benefit of higher evaporating temperature is reduced dehumidification by the evaporator coil.
This allows higher relative humidity in cold room or cold cases. Higher relative humidity reduces weight shrinkage and improves
freshness of stored product.
Low Ambient
High Ambient
Higher
Evaporating Temp
ZX Capacity
Reciprocating Capacity
Allows
Smaller Unit
Figure 04
Features
Owner/Enterprise Benefit
Energy improvement (More than $350 per year)
•Lower operating costs
Sound improvement
• Creating a more comfortable environment for guests
• Beneficial for regions with noise ordinances
Diagnostic protection capabilities
• Reduces cost of nuisance calls
• Extends life of your equipment
• Reduces potential service costs
• Maintains your equipment to original standards, maintaining
energy efficiency and temperature control
• Have confidence in what your contractor is fixing
Slim profile, lighter weight, and optional wall mount capability
• Lower installation costs
• Improved appearance of your enterprise site
• Avoids more costly solutions for potential location issues
*For applications outside these guidelines, please contact Application Engineering.
