The differences between integrated and split screw chiller units with evaporative condensers

Introduction

In industrial refrigeration and large‑scale commercial air-conditioning systems, the combination of screw chillers and evaporative condensers is widely used. Depending on the equipment’s structural configuration, this arrangement is primarily categorized into two types: integrated units and split units. Understanding the differences between these two configurations helps make more informed decisions during project design and equipment selection.

Characteristics of an integrated structure

The packaged unit integrates core components such as the screw compressor, evaporative condenser, evaporator, and control system into a single base or cabinet.

• Easy to installThe equipment is fully assembled, with piping welded and electrical wiring completed at the factory, and undergoes comprehensive factory acceptance testing. On-site, it requires only water and power connections to become operational, significantly shortening the construction timeline.
• Small footprint: The compact layout design effectively saves space in server rooms or outdoor sites, making it ideal for projects with limited space.
• Transportation Restrictions: Due to its large overall dimensions and weight, transportation may be subject to restrictions imposed by road traffic regulations and lifting conditions.

Characteristics of a Split-Structure Design

In the split‑type configuration, the screw chiller and the evaporative condenser are manufactured separately and assembled on site.

• Flexible layout: The condenser is typically installed outdoors on the roof or in an open area, while the unit is housed in an indoor machine room. The two are connected via piping, thus not being constrained by the transport dimensions of a single piece of equipment.
• Easy maintenance: Each component is independently positioned, providing maintenance personnel with ample working space for routine servicing or component replacement.
• The on-site workload is heavy.: On-site activities include pipeline welding, insulation, vacuuming, refrigerant charging, and electrical commissioning, which place high technical demands on the construction team and result in a relatively lengthy overall commissioning period.

Selection Recommendations and Considerations

When choosing between an integrated and a split‑type solution, it is essential to conduct a comprehensive assessment of the project’s specific requirements.

• Venue conditions: If the equipment room is small and there is a suitable outdoor location, a split‑type system is more appropriate; if the overall site is constrained, the compact design of an integrated unit offers greater advantages.
• Project durationFor projects with tight schedules, the rapid installation capabilities of integrated equipment can significantly accelerate progress.
• System capacityFor projects with extremely high cooling capacity requirements, constrained by transportation and manufacturing limitations, a split‑type configuration is typically employed to meet the required capacity.