Aug. 11th, 2025
The 4m Solar Collector Tube is a specially designed vacuum tube with a length of 4000mm, engineered for large-scale solar thermal systems and industrial heating applications. Its primary function is to absorb sunlight and convert it into heat energy, which can be used for hot water production, industrial process heating, or as a component in solar thermal power generation (CSP) plants.
With its extended length, this tube offers a larger heat absorption area, leading to higher energy output while reducing the number of tubes needed for installation—cutting both labor and maintenance costs.
Exceptional Thermal Efficiency
Double-layer high-borosilicate glass vacuum design.
Solar absorption rate: 93%–96%.
Heat loss coefficient: <0.5 W/m²·K for outstanding insulation.
Extended Length Advantage
4 meters long, increasing thermal collection capacity by up to 35% compared to standard tubes.
Fewer connection points, improving reliability and reducing leak risks.
Durability for Harsh Environments
Triple-target coating (Al-N/Al) ensures resistance to UV degradation.
Stable performance in temperatures up to 300°C.
Flexible Applications
Suitable for commercial hot water systems, industrial process heating, and CSP power plants.
Parameter | Value |
|---|---|
Tube Length | 4000 mm ± 5 mm |
Tube Diameter | 58 mm / 70 mm (customizable) |
Material | High-borosilicate glass 3.3 |
Coating Type | Triple-target coating (Al-N/Al) |
Absorption Rate | 93% – 96% |
Emissivity | <0.08 |
Max Temperature | ≤300°C |
Service Life | ≥15 years |
Commercial Hot Water Systems – Hotels, hospitals, schools
Industrial Heating – Textile, chemical, and food processing industries
CSP Plants – Concentrated solar power generation
Agricultural Use – Greenhouse heating and crop drying
Official Data (China Solar Thermal Utilization Association, 2023):
A 4m solar collector tube improves thermal efficiency by 28%–35% compared to 2m tubes.
Annual heat output: +500–750 kWh per tube.
Business Example (Shandong, China):
Installed 300 pcs of 4m tubes instead of 520 pcs of 2m tubes.
Reduced installation points by 42% and cut annual maintenance cost by 20%.
