Influence of thermal conductivity of aluminum-plastic co-extruded profile on indoor temperature

As a new type of energy-saving and environmentally friendly profile, aluminum-plastic co-extruded profile has been widely used in the field of doors, windows and curtain walls in recent years. Its excellent thermal insulation performance is due to its unique structural design, i.e., a layer of plastic profile with excellent thermal insulation performance is sandwiched between two layers of aluminum alloy profiles inside and outside. However, the thermal conductivity of aluminum-plastic co-extruded profiles is not static, and the size of its value will directly affect the thermal insulation performance of the profile, which in turn has an impact on the indoor temperature.

First, the definition of thermal conductivity and influencing factors

Thermal conductivity (λ) is an important parameter to measure the thermal conductivity of the material, the larger the value, indicating that the thermal conductivity of the material is stronger, the worse the thermal insulation performance. For aluminum-plastic co-extruded profile, its thermal conductivity mainly depends on the following factors:

Aluminum alloy profile thermal conductivity: Aluminum alloy thermal conductivity is higher, about 160-220 W/(m-K), is the main source of thermal conductivity of aluminum-plastic co-extruded profiles.

Thermal conductivity of plastic profiles: the thermal conductivity of plastic is low, about 0.2-0.5 W/(m-K), is the key to aluminum-plastic co-extruded profiles heat insulation.

Structural design of the profile: the shape of the cross-section of the profile, the number and size of the insulation chamber and other factors will affect its thermal conductivity.

Second, the influence of thermal conductivity on indoor temperature

Aluminum-plastic co-extruded profiles of the thermal conductivity of the impact on the indoor temperature is mainly reflected in the following aspects:

1. Heat insulation and cooling in summer

Summer outdoor temperature is high, solar radiation is strong, if the thermal insulation performance of windows and doors curtain wall is poor, heat will be conducted into the room through the profile, resulting in indoor temperature rise, increase the air conditioning load. The lower the thermal conductivity of aluminum-plastic co-extruded profiles, the better their thermal insulation performance, can effectively block the outdoor heat into the room, reduce indoor temperature, reduce air conditioning energy consumption, create a cool and comfortable indoor environment.

2. Heat preservation and energy saving in winter

Winter outdoor temperature is low, the temperature difference between indoor and outdoor is big, if the thermal insulation performance of doors and windows curtain wall is poor, the indoor heat will be dissipated to the outdoor through the profile, resulting in a lower indoor temperature, increasing the heating load. The lower the thermal conductivity of aluminum-plastic co-extruded profiles, the better their thermal insulation performance, which can effectively reduce the loss of indoor heat, maintain a stable indoor temperature, reduce heating energy consumption and save energy.

3. Improvement of indoor thermal comfort

Indoor temperature is an important factor affecting human thermal comfort. Too high or too low indoor temperature will make people feel uncomfortable. Aluminum-plastic co-extruded profiles can effectively regulate the indoor temperature by reducing the coefficient of thermal conductivity, so that it is kept within the range of human comfort, and improve the comfort of living.

Third, reduce the thermal conductivity of aluminum-plastic co-extruded profiles measures

In order to further improve the thermal insulation performance of aluminum-plastic co-extruded profiles, reduce its thermal conductivity, the following measures can be taken:

Selection of plastic profiles with lower thermal conductivity: for example, the thermal conductivity of polyurethane (PU) is lower than that of polyvinyl chloride (PVC), which can further reduce the overall thermal conductivity of the profile.

Increase the number and size of insulation chambers: Insulation chambers can effectively block the transfer of heat, increasing the number and size of insulation chambers can significantly reduce the thermal conductivity of the profile.

Optimize the structural design of the profile: for example, the use of multi-chamber structure, increase the thermal insulation strip and other measures can further improve the thermal insulation performance of the profile.

Fourth, the conclusion

The thermal conductivity of aluminum-plastic co-extruded profiles is a key factor affecting their thermal insulation performance, which has an important impact on the indoor temperature. By reducing the thermal conductivity of aluminum-plastic co-extruded profiles, it can effectively block the outdoor heat from entering the room, reduce the indoor heat loss, regulate the indoor temperature, improve the indoor thermal comfort and save energy. Therefore, when choosing aluminum-plastic co-extruded profiles, attention should be paid to its thermal conductivity indicators, and according to the actual needs of the selection of lower thermal conductivity, better thermal insulation performance of the product.

Future Prospect

With the continuous improvement of people's requirements for energy saving and environmental protection, the application of aluminum-plastic co-extruded profiles will become more and more widespread. In the future, the development trend of aluminum-plastic co-extruded profiles will move towards the direction of lower thermal conductivity, higher strength and longer service life. I believe that with the continuous progress of technology, aluminum co-extruded profiles will create a more comfortable, energy-saving, environmentally friendly living environment for people.