Cytech
Product Description
A Thermosyphon Heat Exchanger is a passive, high-efficiency air-to-air cooling system designed for telecom cabinets, energy storage enclosures, power control cabinets, and outdoor electronic equipment.
Using natural convection and phase-change heat transfer, it provides reliable, low-energy cooling without compressors—making it ideal for remote and off-grid applications.
Zero compressor, zero refrigerant pump
Uses natural phase change circulation
Ultra-low energy consumption
Silent operation
650W/K cooling efficiency
Rapid heat transfer via gravity-driven thermosyphon loop
Stable performance in harsh outdoor environments
IP55 / IP65 protection (optional)
Corrosion-resistant aluminum/galvanized steel housing
Suitable for extreme climates: -40°C to +65°C
No mechanical wear
Minimal maintenance required
Ideal for long-term deployment at telecom and power sites
A thermosyphon heat exchanger operates using a gravity-driven refrigerant loop inside sealed tubes:
1.Heat inside the cabinet evaporates the refrigerant.
2.The vapor naturally rises upward.
3.In the external condenser section, the vapor releases heat to the outside air.
4.It condenses back to liquid and returns downward by gravity.
5.The cycle repeats continuously—no pump, no compressor.
This provides efficient, passive thermal management with extremely low energy use.
▼see below illustration▼
Name | Thermosyphon Heat Exchanger (650W/K) |
Cooling Capacity | 650w/k |
Power Supply | 48VDC powered |
| Cooling modes | Thermosyphon Heat Pipe System |
Power Consumption | Fan power only (650w-680w) |
| Material | Aluminium/galvanized steel |
Max Noise Level | < 60 dB |
IP Grade | IP55 / optional NEMA rating |
Heater | TPC heater (optional) |
| Working temperature | −40°C to +65°C |
Refrigerant | R134a,Refrigerant R1234yf as optional |
| Fans | External fans IP55 with e-coating,pass 1000ah salt frog test DC Backward Curved Centrifugal Fans |
| Installation | Door-mount / side-mount options available |
Applications
4G/5G BTS outdoor cabinets
Remote telecom base stations
Microwave repeater enclosures
Battery storage cabinets
Hybrid power systems
Residential/industrial ESS cases
Outdoor electrical control cabinets
VFD drive cabinets
UPS enclosures
Solar inverter enclosures
Advantages
Energy cost reduction compared to compressor AC
Lower CO₂ footprint
Reduced system complexity
High reliability for unmanned, remote sites
Improved equipment stability and lifespan
Advanced patented heat pipe design
Optimized airflow for maximum heat transfer
Outdoor-grade structure for telecom and ESS
Custom voltage, materials, and mounting options
Proven performance in >30 countries
| Feature / Technology | Thermosyphon Heat Exchanger | Heat Pipe Heat Exchanger | Cabinet Air Conditioner | Hybrid Cooling Unit (AC + HEX) |
|---|---|---|---|---|
| Cooling Capacity | Medium (650W/K) | Medium (60–80W/K) | High (300–3000W+) | High + Passive (1000W AC + 80W/K HEX) |
| Energy Consumption | Very Low (Fan only) | Very Low | High (compressor) | Medium |
| Cooling Method | Passive phase-change gravity loop | Wick-based heat pipe | Refrigerant compressor system | Compressor + passive HEX |
| Best Use Case | Telecom / ESS in moderate climates | Moderate climates / general outdoor | High-temperature environments | Wide climate range & energy-saving |
| Operating Cost | Lowest | Low | Highest | Medium |
| Maintenance | Minimal | Minimal | High (filters, refrigerant, compressor) | Moderate |
| Heat Removal Efficiency | High at ΔT > 10°C | Moderate | Very High | Very High |
| Reliability | Excellent (no moving parts) | Excellent | Good | Very Good |
| Orientation Requirement | Must be vertical (gravity return) | Any orientation | Any | AC: any / HEX: vertical |
| Noise Level | Very low | Very low | Medium–High | Medium |
| Installation | Easy | Easy | Moderate | Moderate |
| Protection Level | IP55–IP65 | IP55–IP65 | IP54–IP65 | IP55–IP65 |
| Initial Cost | Low | Low | High | Medium–High |
| Suitable Climates | Mild–hot (not extreme) | Mild–hot | Hot & severe climates | All climates |
| Ideal Industries | Telecom, Battery ESS, Power cabinets | Telecom, industrial | Telecom, Data centers, Power | Telecom, ESS, Hybrid sites |
FAQS
A thermosyphon relies on gravity-driven refrigerant return, while heat pipes use a wick structure and can operate in any orientation.
Yes. It uses minimal energy—only fans—making it ideal for low-power telecom and ESS applications.
In moderate climates, yes.
In hot climates, it is often paired with a small AC unit (hybrid cooling).
Only basic filter cleaning and airflow checks—no refrigerant or mechanical wear.
Yes—options include IP65 protection and anti-corrosion coatings.
Looking for a reliable passive cooling solution for telecom or battery systems?
Contact us for pricing, customization, and engineering support.
