Edit:Viewmate all-glass railing
1. Aluminum’s Thermal Conductivity and Perceived Temperature
Aluminum possesses high thermal conductivity (approximately 167 W/m·K), over three times that of steel (approximately 50 W/m·K). This means:
Faster heat dissipation: Aluminum rapidly transfers absorbed heat throughout the structure, preventing localized overheating.
More Sensitive Touch: Although the actual surface temperature of aluminum may be lower than that of dark concrete or steel, its high thermal conductivity allows heat to transfer to the skin faster, making it feel “hotter.” For example, under the same sunlight, stainless steel surfaces may reach 67.5°C, while concrete can reach 78.3°C. However, aluminum’s rapid heat transfer makes it feel noticeably hotter to the touch.
2. Impact of Color and Surface Treatment：
Color: Dark surfaces (e.g., black, dark gray) absorb more solar energy, leading to significantly higher temperatures. For instance, dark gray aluminum roller shutters can exceed 60°C on summer days.
Surface Treatment: Powder coating or light-colored finishes (e.g., white, light gray) effectively reflect sunlight, reducing heat absorption. Anodizing also enhances heat resistance and corrosion resistance.
3. Environmental and Climatic Conditions：
Sunlight Intensity: In high-temperature, high-radiation areas (e.g., under intense summer sun), aluminum surface temperatures may rise to 50°C–70°C (122°F–158°F).
Environmental Adaptability: Aluminum maintains stable performance between -30°C and 80°C, but prolonged exposure to high temperatures (>80°C) may compromise structural integrity.
4. Comparison with Other Materials：
| Material | Thermal Conductivity | Typical Surface Temp (in Sun) | Perceived Heat |
|---|---|---|---|
| Aluminum | High | Moderate (heats up quickly) | Hot to the touch |
| Steel | Moderate | High (esp. dark colors) | Very hot |
| Concrete | Low | High (but slow conduction) | Less hot to the touch |
| Wood | Low | Low | Cool to the touch |
5. Practical Recommendations to Reduce Heat Accumulation：
Opt for Light-Colored Coatings: White or light gray powder coatings reflect more sunlight, lowering surface temperatures.
Incorporate Shading Designs: Reduce direct sunlight exposure through architectural shading elements (e.g., canopies, vegetation).
Consider Composite Materials: Novel aluminum-based carbon fiber composites further enhance heat dissipation and thermal resistance.
Post time: Sep-18-2025