Tan Long Factory Standard Technical Specifications Matrix
1. Inner-Grooved Copper Tube & Corrugated Aluminum Fin Technology
Tan Long unit cooler evaporators deliver superior heat exchange performance via:
• Inner-grooved spiral micro-fins inside copper tubes expand internal contact area by 65% and induce turbulent flow, maximizing boiling coefficients.
• Corrugated 3D sine-wave aluminum fins with hydrophilic polymer coatings shield against moisture accumulation and marine salt spray.
2. High-Efficiency Automated Defrost Systems
Tan Long engineers three custom defrost configurations depending on room temperature:
• Electric Resistance Defrost: High-grade stainless heating elements distributed evenly through coil banks and drain pans, clearing frost cleanly in 20 minutes.
• Automated Hot Gas Defrost: Diverting superheated discharge gas into evaporator tubes, melting frost from within in 10-15 minutes without electrical heating demand.
3. Aerodynamic Air Throw for Uniform Climate Distribution
High-capacity axial fans with streamlined discharge nozzles project air throw up to 40 meters, distributing gentle laminar airflow from ceiling to floor and ensuring corner pallets maintain target temperatures.
Competitive Advantages & Market Comparison Matrix
Technical comparison between genuine Tan Long refrigeration equipment manufactured at Duc Hoa 1 Industrial Park versus substandard market alternatives:
Tan Long Equipment Advantages
- ✓ Variable fin spacing widening from intake to discharge, minimizing required defrost cycles per day
- ✓ Double-insulated stainless drain pans with trace heating cables preventing drain outlet freeze-ups
- ✓ High-efficiency German Ziehl-Abegg / EBM axial fans operating whisper-quiet with 10+ year lifespans
- ✓ 30% lower turnkey cost compared to fully assembled European imports while matching thermal performance
Drawbacks of Manual / Used Imported Systems
- ✗ Generic narrow-fin evaporators (3-4mm) freeze solid within 3 operating hours, choking airflow
- ✗ Single-sheet thin metal drain pans sweat condensation onto cargo cartons, collapsing pallet stacks
- ✗ Cheap fan motors generate loud vibration and suffer burnt windings in sub-zero environments
- ✗ Thin copper tubes crack easily at return bends, causing total refrigerant loss
Frequently Asked Questions (FAQs) by Engineers & Investors
Q1: What fin spacing is recommended for frozen seafood cold storage?
For seafood holding at -20°C to -25°C, Tan Long recommends wide fin spacing of 9.0mm to 12.0mm. Wide fin pitch accommodates higher frost loading without choking airflow, maintaining stable room temperatures throughout long shifts.
Q2: How can defrost water dripping onto palletized goods be prevented?
Tan Long evaporators feature double-walled SUS304 drain pans with injected PU insulation preventing exterior condensation, steep drain slopes, and electric trace heaters along drain piping ensuring meltwater evacuates immediately without refreezing.
