Compact scroll compressor liquid chiller

Cleanroom HVAC and Air Handling Equipment

Scroll Compressor Chiller

A compact liquid chiller using multiple hermetic scroll compressors for quiet staged cooling and straightforward circuit redundancy.

Multiple Hermetic Scrolls
Fine Capacity Staging
Low-Vibration Operation
Compact Service Layout

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Product Introduction

The scroll compressor chiller combines several hermetic scroll compressors in independent or paired refrigerant circuits. Each orbiting scroll compresses gas continuously with few moving parts, producing low vibration and a compact enclosure. Compressor staging matches part-load demand in small increments, and a circuit can remain off or be serviced while other circuits operate. Air-cooled versions use condenser fans and finned coils; water-cooled versions use a compact condenser connected to a water loop.

Key Features

Multiple scroll compressors create smaller operating steps than one large fixed-capacity compressor.

Hermetic construction and continuous compression reduce external shaft seals and vibration.

Independent circuits maintain partial cooling when one circuit is unavailable.

Compact compressor dimensions support packaged chillers and modular plant layouts.

Customer Product Concerns

Scroll chillers rely on coordinated staging and adequate water volume to prevent excessive starts under light or rapidly changing load.

The chiller cycles when the active process load is smaller than its first capacity step.Multiple smaller compressors and appropriate buffer volume lengthen operating cycles.

Simultaneous compressor starts create a large electrical demand peak.Timed staging starts compressors sequentially as leaving-water demand increases.

One refrigerant leak removes the entire cooling plant.Independent circuits isolate the affected section while remaining circuits continue.

Condenser fouling raises pressure and trips compressors during hot weather.Accessible coil faces and staged fan control maintain design condenser airflow.

Typical Applications

Small and medium cleanroom systemsLaboratory chilled-water loopsMedical-device facilitiesProcess equipment coolingPhased pharmaceutical projects

Technical Parameters

Representative enclosure and evaporator insulation data for a packaged scroll chiller are listed below.

Core Material	Closed-cell synthetic NBR foam on the brazed-plate evaporator and suction lines
Panel Thickness	1.0–1.5 mm removable equipment panels
Effective Width	800–2200 mm nominal equipment width
Maximum Length	Up to 7000 mm for multi-circuit air-cooled configuration
Steel Facing Thickness	1.0–2.0 mm galvanized frame and enclosure panels
Core Density	40–60 kg/m³ closed-cell synthetic NBR insulation
Thermal Conductivity	≤0.036 W/(m·K) at 20°C for the NBR insulation
Surface Finish	Polyester powder-coated galvanized steel with corrosion-resistant heat-exchanger option
Joint Type	Welded base with bolted service panels and grooved or threaded hydronic connections
Customization	Available based on the intended application and operating environment.

Available Options

Air-cooled or water-cooled condenserFixed-stage or variable-speed lead scrollIntegrated pump and buffer vesselLow-ambient, low-noise and partial heat-recovery packages

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