Projects / Central Ammonia Chiller & Glycol Loop Overhaul
CASE STUDY // HVAC•Cold Chain Logistics Operator•18,500 m² cold storage facility
Central Ammonia Chiller & Glycol Loop Overhaul
FIELD RECORD // PROCESS HVAC & INDUSTRIAL REFRIGERATION
Engineering Performance Metrics & Delivery Parameters
Cooling Capacity1,700 kW
Temperature Hold-22°C continuous
Radiographic Tests100% pass
Energy Reduction18.4% COP gain
FIGURE 1.0 // AS-BUILT SCHEMATICVerified by Lead Discipline Engineer
FLOWSHEET // INDUSTRIAL AMMONIA & GLYCOL LOOPPID-HVAC-302
The Technical Brief
Refurbish two 850kW ammonia screw compressor packages, re-pipe suction and discharge headers, and replace the secondary propylene glycol pumping manifold.
Site & Operating Constraints
The facility stores over $14M in perishable seafood and dairy stock. Room temperatures had to remain locked at -22°C continuously throughout hot work and pipe header replacements.
Execution Methodology & Works Delivered
- Installed a temporary external glycol chiller skid with bypass manifolds to sustain cooling loads
- Isolated, purged, and chemically swept the existing ammonia circuits under certified refrigeration procedures
- Fabricated Schedule 40 low-temperature carbon steel headers with 100% radiographic weld inspection
- Replaced twin oil separators, installed automated variable-frequency drive controls on compressor motors
- Executed ammonia charge balancing and vacuum hold verification down to 500 microns
Verified Outcome
Total system coefficient of performance (COP) improved by 18.4%, saving approximately $4,200 monthly in electrical demand charges while keeping storage temperatures constant throughout.
Discuss Similar Facility Scope
If your plant requires similar switchgear cutover, refrigeration overhaul, or cleanroom installation, speak directly with our team.
Discuss via WhatsAppSubmit Detailed RFQJob Summary
Industry SectorCold Storage, Food & Beverage Processing
Core ServiceProcess HVAC & Industrial Refrigeration
Total Duration6 weeks continuous execution
Downtime AllocationZero process stoppage (continuous phased cutover)