Container House Gets Hot in Summer

The issue of container houses getting hot in summer can be addressed by optimizing thermal insulation structures, using high-efficiency thermal insulation materials, enhancing ventilation designs, and implementing auxiliary cooling measures.

Thermal Insulation Structure Optimization

The thermal performance of container houses primarily relies on a three-layer structure: the outer layer of anti-corrosion color-coated steel plate reflects sunlight, the middle layer of over 50mm polyurethane foam blocks heat conduction, and the inner layer of fire-resistant gypsum board combined with a moisture-proof film controls humidity and stabilizes temperature. This structure enables the wall's heat transfer coefficient to be ≤0.45W/(㎡·K), with thermal insulation efficiency 1.8 times that of traditional brick-and-concrete walls. In actual measurements, the cabin's temperature rise at noon in summer is 22 minutes slower than that outside, providing a more stable and comfortable indoor environment.

Application of High-Efficiency Thermal Insulation Materials

• Sandwich Panel Upgrade: Choosing sandwich panels with aluminum foil reflective layers can further reflect thermal radiation and reduce heat absorption. For example, a café in Moganshan adopted such materials, along with a sunshade roof and bottom ventilation slots, resulting in significantly lower indoor temperatures in the afternoon compared to outside.
• Increased Foam Thickness: Increasing the thickness of polystyrene foam or polyurethane foam during construction can enhance thermal insulation and reduce heat transfer.
• Rock Wool Substitution: Rock wool sandwich panels offer Class A fire resistance and also provide some thermal insulation, making them suitable for scenarios with high fire safety requirements.

Ventilation and Sunshade Design

• Adjustable Sunshade Roof: By blocking direct sunlight, it reduces heat absorption on the roof and lowers indoor temperatures.
• Bottom Ventilation Slots: These promote air circulation, creating natural convection to carry away heat and improve the stuffy conditions at the bottom.
• Double-Layer Container Structure: Utilizing an air layer for thermal insulation, such as the double-layer container used by the Moganshan café, effectively blocks heat conduction through the intermediate air layer.

Auxiliary Cooling Measures

• Air Source Heat Pump and Underfloor Heating System: Upgrading to a combination of photovoltaic-thermal panels and underfloor heating can stably control indoor temperature and reduce temperature fluctuations.
• Smart Temperature Control System: Sensors monitor indoor temperature and automatically adjust ventilation or auxiliary cooling equipment to enhance comfort.