Shell-and-tube Evaporator

The Lynxcool Shell-and-tube Evaporator is the preferred evaporator for industrial refrigeration and process cooling applications exceeding 50 kW. Compared with plate or spiral-tube evaporators, its high thermal mass, corrosion resistance, and robust design ensure stable operation under demanding conditions. Whether applied in cold storage, food processing, chemical, or pharmaceutical cooling, the evaporator delivers reliable performance while minimizing downtime and maintenance costs.

Key Advantages

The Lynxcool Shell-and-tube Evaporator excels in heat transfer efficiency, material flexibility, and long service life. Its design supports multi-refrigerant compatibility (NH₃, CO₂, HFC, HFO blends), rapid on-site installation, OEM replacement, and low maintenance. Factory-applied insulation and coatings reduce installation labor and ensure consistent thermal performance.

Core Technical Features

Flooded vs. DX Shell-Side Design

Flooded evaporators fully submerge the tube bundle in liquid refrigerant, increasing the wetted area and heat transfer coefficients by 20–35%, making them ideal for ammonia and large HFC systems. DX (direct-expansion) configurations use a minimal refrigerant charge, suitable for CO₂ low-GWP systems and modular chillers, balancing refrigerant inventory control and safety requirements.

Tube Bundle Optimization

Standard copper tubes feature an internal micro-fin profile to increase heat transfer surface area by 60–80% and maintain turbulent flow even at low Reynolds numbers. The external surface is configured with low fins or smooth tubing depending on the refrigerant type, optimizing nucleate boiling efficiency. For ammonia applications, smooth external tubes prevent liquid entrainment and improve bubble departure.

Pressure Vessel Compliance

The shells of the Lynxcool Shell-and-tube Evaporator are fabricated from Q345R or SA-516 Gr.70 certified steel, with longitudinal welds radiographically inspected (RT Grade II) and hydrostatically tested at 1.25× design pressure. Tube-to-tube sheet joints are roller-expanded and seal-welded for ammonia service. Third-party inspections (CCS, TÜV, Bureau Veritas) are available upon request.

Material and Corrosion Resistance

Tube material is selected based on process fluid: TP2 copper for clean chilled water, 316L stainless steel for mild acids or food-grade circuits, Titanium Grade 2 for seawater or aggressive chemicals, and Cupronickel 90/10 for marine applications. Tube sheets are matched to tube alloys to prevent galvanic corrosion.

Technical Parameters

Applications and Target Users

The Lynxcool Shell-and-tube Evaporator is a versatile solution for industrial, commercial, and district cooling applications, providing reliable performance, high heat-transfer efficiency, and long-term durability. It is designed to meet the needs of industries with demanding cooling requirements while ensuring adaptability to various process fluids and refrigerants.

Industrial Refrigeration

The evaporator is ideal for:

● Cold storage warehouses – providing stable low-temperature cooling for large-scale storage.

● Spiral freezers – maintaining uniform temperature in continuous freezing processes.

● Packaged ammonia screw chillers – supporting high-capacity industrial refrigeration systems.

● CO₂ transcritical systems – handling high-pressure, low-GWP refrigeration with safety and efficiency.

Process Cooling

Applications include:

● Chemical reactor jacket cooling – compatible with aggressive chemicals using 316L stainless steel or Titanium Grade 2.

● Plastic injection molding and extrusion lines – precise temperature control for manufacturing processes.

● Food and beverage fermentation tanks – ensuring consistent cooling for high-quality production.

● Pharmaceutical clean-room loops – maintaining GMP-compliant cooling for sensitive processes.

HVAC and District Cooling

● OEM chiller barrel replacements – drop-in replacements for large centrifugal and screw chillers.

● Standalone district cooling heat exchangers – efficient water-to-water or refrigerant-to-water heat transfer.

● Hybrid free-cooling circuits – high-pressure hot-water recovery and low-energy cooling solutions.

Overall, the Lynxcool Shell-and-tube Evaporator combines adaptability, material flexibility, and high-efficiency heat transfer, making it an ideal choice for industrial and commercial systems that demand reliability and long-term operational stability.

After-Sales Service

Lynxcool provides comprehensive after-sales support to ensure long-term, reliable operation:

● Technical Support: Thermal calculations, fluid compatibility checks, and tube material recommendations

● Installation Guidance: On-site or remote support to ensure proper connections and sealing

● Commissioning Assistance: Pre-startup testing and performance validation

● Regular Maintenance: Annual inspections, tube cleaning, and preventative maintenance guidance

● Spare Parts Supply: Long-term availability of original components

● Remote Monitoring: Operational data analysis and troubleshooting

● Emergency Response: 24-hour rapid response for critical equipment issues

FAQ

Q: What is the difference between a flooded and DX evaporator?

A: Flooded designs immerse the tube bundle in liquid refrigerant, increasing heat transfer by 20–35%, ideal for ammonia and large HFC systems. DX designs use minimal refrigerant, suitable for CO₂ low-GWP systems or modular chillers.

Q: How should I select tube material for my process fluid?

A: Clean water or glycol: TP2 copper. Mild acids or food-grade fluids: 316L stainless steel. Seawater or corrosive fluids: Titanium Grade 2. Lynxcool engineers verify compatibility before fabrication.

Q: Can Lynxcool manufacture replacement barrels for existing OEM chillers?

A: Yes — providing nameplate and flange drawings allows a direct drop-in replacement of the Lynxcool Shell-and-tube Evaporator, with typical delivery in 8–12 weeks and minimal downtime.

Q: Is the insulation removable for maintenance?

A: Yes, factory-applied PU foam has removable end covers, allowing tube bundle inspection and cleaning without refrigerant recovery.

Q: What is the lead time and documentation package?

A: Standard units: 4–6 weeks. Large or special-material units: 8–14 weeks. Documentation includes GA drawings, thermal datasheets, MTRs, weld maps, radiographic and hydrostatic test reports, packing list, and third-party certificates if required.