Industrial & Commercial Chillers — Screw, Scroll, Centrifugal & Absorption
Chillers deliver chilled water (7/12 °C typical) or glycol for HVAC air handlers, process cooling, data centres and food manufacturing. Compressor type (scroll, screw, centrifugal, absorption) and heat-rejection method (air vs water) drive efficiency, footprint and lifecycle cost.
What it is & where it's used
A chiller is a packaged vapour-compression (or absorption) plant that produces chilled water for downstream cooling coils, process users and heat exchangers. Air-cooled chillers reject heat directly to ambient; water-cooled chillers pair with a cooling tower.
- • Commercial HVAC (offices, hotels, malls, hospitals)
- • Industrial process cooling (plastics, pharma, chemical)
- • Data centre chilled-water loops
- • Food & beverage plants
- • District cooling networks
- • Comfort cooling via AHUs and FCUs
- • Injection-mould and process cooling
- • Pharma HVAC and CRAH loops
- • Ice-water tanks for dairy / brewery
- • Data hall CRAH / RDHx loops
- • Centralised, highly efficient at part-load with IPLV designs
- • Broad refrigerant options (R-1234ze, R-513A, NH₃, CO₂)
- • Water-cooled offers 20–35% better full-load kW/TR than air-cooled
- • Magnetic-bearing centrifugals reach IPLV 0.35 kW/TR
- • Water-cooled requires cooling tower, water treatment and blowdown
- • Air-cooled derates at high ambient (>40 °C)
- • Refrigerant charge and F-Gas / EPA compliance
Typical project sizes: 30 TR (100 kW) rooftop scroll up to 6,000 TR (21 MW) centrifugal.
Air-Cooled Chiller vs Water-Cooled Chiller
| Criterion | Air-Cooled Chiller | Water-Cooled Chiller |
|---|---|---|
| Full-load efficiency | 0.95–1.25 kW/TR | 0.55–0.75 kW/TR |
| IPLV efficiency | 0.60–0.85 kW/TR | 0.35–0.55 kW/TR |
| Requires cooling tower | No | Yes (with pumps, water treatment) |
| Best for | Small–mid loads, water-scarce sites | Large loads (>300 TR), continuous duty |
| CAPEX (installed) | USD 900–1,600 / TR | USD 1,200–2,400 / TR incl. tower |
| Maintenance | Coil cleaning, refrigerant PM | Tower water chemistry, tube brushing, PM |
| Ambient derate | Yes above 40 °C | Marginal — wet-bulb driven |
How to evaluate
- 01Size for peak block load, not sum of user peaks — 15–25% oversizing wastes CAPEX and hurts part-load kW/TR.
- 02Insist on ARI 550/590 certified IPLV/NPLV — nominal COP alone is misleading.
- 03Specify a low-GWP refrigerant (R-1234ze, R-513A, R-1233zd, R-717 or R-744) to future-proof against phase-downs.
- 04For >300 TR continuous duty, water-cooled + magnetic-bearing centrifugal usually beats air-cooled on 15-year TCO.
- 05Add a small chiller in parallel with the large machine to hold efficiency at 10–30% load (base + peaking).
- 06Confirm sound level dB(A) at 10 m for rooftop installs; noise attenuators cost 5–8% of chiller price.
- 07For hot-climate air-cooled, add adiabatic pre-cooling pads to recover 8–15% of capacity at design day.
Spec checklist
- Design cooling load (kW / TR / BTU/hr)
- Chilled water supply / return temperatures and flow
- Ambient design conditions (dry-bulb / wet-bulb)
- Redundancy (N, N+1, 2N) and diversity
- Refrigerant and GWP compliance target
- Efficiency target — full load & IPLV kW/TR
- Heat recovery / free-cooling requirement
- Acoustic limit dB(A) at property line
- Water quality (for water-cooled)
- BMS integration protocol (BACnet / Modbus)
Investment & operating cost
- Air-cooled scroll (30–200 TR)USD 900–1,400 / TR installed
- Air-cooled screw (200–600 TR)USD 1,100–1,600 / TR installed
- Water-cooled screw (300–1,200 TR)USD 1,200–1,900 / TR installed
- Water-cooled centrifugal / magnetic-bearing (600–4,000 TR)USD 1,400–2,400 / TR installed
Indicative ranges. Actual quotations vary by country, scope, spec, freight and site conditions.
- • Compressor type and efficiency class
- • Refrigerant (low-GWP premium 10–20%)
- • Heat-rejection method
- • Sound attenuation
- • Redundancy strategy
- • BMS + variable-primary pumping
- • Heat-recovery condensers
- • Adiabatic pre-cooling pads
- • Free-cooling coils
- • Variable-primary flow package
- • Sound enclosures
- • Structural pad / roof reinforcement
- • Chilled-water piping and pumps
- • Cooling tower + water treatment (water-cooled)
- • Electrical: soft-start / VFD
- • Electricity dominant — model annual kWh at IPLV, not nameplate
- • Water & chemicals for cooling tower
- • Annual refrigerant top-up <2%
- • Quarterly PM contract
- • Annual eddy-current tube test (water-cooled)
- • Refrigerant leak-tightness per F-Gas / EPA 608
Before you request quotations
- Define production goals and daily throughput (kg/day)
- Confirm utilities: power (kVA), water, drainage, compressed air
- Define project scope (turnkey vs supply-only vs hybrid)
- Prepare site layout, floor plan and clear height
- Confirm local regulations (F-Gas, ATEX, HACCP, seismic code)
- Determine financing route (own cash, lease, bank loan, ECA)
- Create technical specification with U-values and setpoints
- Prepare RFQ and shortlist qualified international suppliers
Interactive evaluation matrix
Score each shortlisted supplier on the criteria below. All calculations run locally — nothing is sent to our servers.
| Criterion | |||
|---|---|---|---|
Price / Investment Turnkey CAPEX including installation, controls and commissioning. | |||
Warranty (years) Comprehensive, on major components (compressors, PLC, panels). | |||
Lead time (weeks) Ex-works or delivered to site including customs. | |||
Energy efficiency (SEC / COP) Lower SEC or higher COP is better. | |||
Local service & spare parts Response time, service partner in country, stocked spares. | |||
References / installed base Comparable capacity, region and application. | |||
Maintenance program Preventive maintenance plan, remote monitoring. | |||
Operator training On-site training days, documentation, language. | |||
Expandability Add capacity, modules or additional rooms later. | |||
Lifecycle cost (10y) CAPEX + energy + maintenance + refrigerant cost of ownership. | |||
| Total score | 0 / 50 | 0 / 50 | 0 / 50 |
Common questions
How do I choose between air-cooled and water-cooled chillers?
Below ~300 TR, water-scarce or intermittent-duty, air-cooled usually wins on TCO. Above 300 TR continuous, water-cooled + centrifugal typically saves 20–35% annual kWh and pays back the tower + treatment in 3–5 years.
What is IPLV and why does it matter more than full-load COP?
IPLV (Integrated Part-Load Value, AHRI 550/590) weights efficiency at 100/75/50/25% load. Real HVAC systems run <60% load >80% of the year, so IPLV predicts operating cost far better than nameplate COP.
Which refrigerant should I specify today?
R-1234ze and R-513A (HFO/HFO-blends, GWP <700) for HFC replacement; R-1233zd for centrifugals; R-717 (ammonia) for industrial; R-744 (CO₂) for combined heat-cold. Avoid new R-410A / R-134a projects — restricted in EU F-Gas and phasing down in the US.
Continue your planning
Receive structured, comparable quotations from qualified international suppliers — vendor-neutral. Add financing pre-qualification if the project requires equipment leasing, project loan or ECA-backed facility.