Product Overview
We are a specialized OEM and ODM heat exchanger manufacturer producing high-efficiency finned tube evaporators engineered for severe-duty cooling applications. By optimizing tube-side fluid dynamics, air-side fin geometry, and refrigerant distribution, our custom-built evaporator coils deliver maximum thermal efficiency, reduced defrost frequency, and zero-leak operational reliability for industrial cold rooms, blast freezing tunnels, food processing lines, and pharmaceutical logistics.
Technical Specification
|
Parameter |
Engineering Specification Standard |
|
Product Type |
Heavy-Duty High-Efficiency Finned Tube Evaporator Coil |
|
Evaporating Temp. Range |
-40°C to +10°C (-40°F to +50°F) |
|
Cooling Capacity Output |
Fully customized engineering from 5 kW up to 350+ kW per assembly |
|
Tube Options & Materials |
TP2 / C12200 Deoxidized Seamless Copper (Inner Grooved / Smooth), 304/316L Stainless Steel, Cu-Ni (90/10) |
|
Fin Options & Materials |
High-Grade Aluminum, Hydrophilic-Coated Aluminum, Epoxy Anti-Corrosion Coated Aluminum |
|
Fin Geometry Profiles |
Plain, Sine-Wave Corrugated, or High-Turbulence Louvered Profiles |
|
Fin Spacing Range |
4.5 mm to 12.0 mm (Customized Anti-Frost Spacing) |
|
Refrigerant Compatibility |
R404A, R507A, R134a, R410A, R32, R290 (Propane), R744 (CO₂ Transcritical/Subcritical up to 85 Bar), R717 (Ammonia) |
|
Defrost Configurations |
Electric Element, Hot Gas Bypass, Overhead Water Spray, Natural Air Defrost |
|
Pressure & Leakage Test |
100% Submerged Leak Testing under 3.0 to 3.5 MPa (30 to 35 Bar) Dry Nitrogen Pressure |
|
Manufacturing Compliance |
Built under ISO 9001:2015 Quality Management; Complies with PED 2014/68/EU (CE) and ASME Standards |
Key Advantages
Inner-Grooved Tubing & Precision Mechanical Expansion
• Inner Grooved Copper Tubing: Increases internal surface area by up to 60% and induces refrigerant turbulence, boosting internal heat transfer coefficients by 15% to 25% compared to smooth tubes.
• Vibration Resistance: The precision expanded joint prevents fin loosening caused by continuous fan vibration and cyclic thermal shock during defrosting.
Application-Matched Fin Spacing & Anti-Frost Geometry
• 4.5 mm to 6.0 mm Fin Spacing: Engineered for high-heat-flux medium-temperature applications (0°C to +5°C), maximizing coil surface area for chilled storage and process air handling.
• 7.0 mm to 9.0 mm Fin Spacing: Ideal for frozen storage rooms (-18°C to -25°C), delaying frost bridge formation to extend operation cycles between defrosts.
• 10.0 mm to 12.0 mm Fin Spacing: Purpose-built for blast freezers and quick-freezing tunnels (-30°C to -40°C), ensuring uninterrupted airflow endurance under severe frost conditions.
Corrosion-Resistant Material Formulations
• Hydrophilic Coated Aluminum: Prevents water droplet bridging, improves condensate drainage, and reduces air pressure drop.
• Epoxy Anti-Corrosion Coating: Endures 1,000+ hours of continuous salt spray testing under ASTM B117 standards, ideal for coastal cold storage and seafood processing facilities.
• 304/316L Stainless Steel & Cu-Ni Coils: Designed for sanitary food washdown zones, marine applications, and aggressive chemical processing environments.
Optimized Defrost System Integration
|
Defrost Mechanism |
Recommended Application |
Engineering Highlights |
|
Electric Defrost |
Commercial & Industrial Cold Rooms (-25°C to 0°C) |
Stainless steel heating rods inserted into fin block holes and drip tray for rapid, localized frost melting. |
|
Hot Gas Defrost |
Large Logistics Distribution Hubs (-40°C to -18°C) |
Channels hot compressor discharge gas directly through evaporator circuits. Reduces defrost energy usage by up to 60%. |
|
Water Defrost |
High-Humidity Food Processing (-10°C to +5°C) |
Overhead distribution header washes frost away rapidly using high-flow water spray, maintaining rapid turnaround. |
Quality Assurance & Leakage Prevention Protocol
To ensure a minimum 15-year service life in demanding industrial settings, every evaporator coil undergoes a 4-stage quality control process before shipment:
Material Purity Verification: Spectrometric analysis verifies copper purity (TP2 / C12200, Cu >= 99.9%) and fin aluminum mechanical strength.
Automated CNC Brazing: Headers and circuit distributors are joined using silver-alloy manual or orbital CNC brazing to eliminate cold joints and structural weak points.
100% High-Pressure Submersion Testing: Coils are charged with dry nitrogen at 3.0 to 3.5 MPa (30 to 35 Bar) and submerged in clear inspection tanks for a minimum 30-minute leak check.
Positive Dry Nitrogen Charge: Coils are vacuum-dried and sealed with a positive nitrogen holding charge (0.05 to 0.1 MPa) to prevent moisture ingress and internal oxidation during ocean transit.
OEM Customization Capabilities
Custom Casing Engineering: Heavy-duty galvanized steel with electrostatic powder coating, 304/316 stainless steel, or marine-grade aluminum sheet.
Fan Motor Assemblies: Equipped with high-efficiency axial fans or energy-saving EC (Electronically Commutated) fan systems meeting ErP eco-design directives.
Technical Documentation & Private Labeling: Complete CAD/STEP 3D model support, custom product data plates, factory pressure test certificates, and export-compliant wooden crate packaging.
FAQ
Q: What parameters are required to calculate the correct evaporator coil size?
A: To provide accurate performance calculations and circuit design, please provide:
(1) Target cooling capacity (kW or BTU/h),
(2) Evaporating temperature and room air temperature,
(3) Refrigerant type,
(4) Airflow volume (m3/h) or room dimensions,
(5) Maximum allowable casing footprint.
Q: Are your finned tube evaporators compatible with transcritical CO2 (R744) systems?
A: Yes. We manufacture high-pressure CO2 evaporator coils utilizing thick-wall copper alloy or stainless steel tubing and reinforced steel headers rated for design operating pressures up to 85 bar.
Q: How do you protect evaporator coils from marine or high-salinity corrosion?
A: For coastal or marine installations, we recommend 304/316L stainless steel tubes paired with epoxy-coated fins or full coil E-coating (Electro-deposition), certified to pass 1,000-hour ASTM B117 salt spray testing.
Q: What is the typical lead time for custom OEM evaporator coils?
A: Engineering drawings and thermal calculations are completed within 24 to 48 hours. Sample prototypes are produced within 5 to 7 working days, and standard bulk production orders are dispatched within 15 to 20 days after drawing approval.
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