I. Definition and Overview
Pre-insulated PID Duct, also known as pre-insulated air duct, is an advanced ventilation duct system that integrates insulation materials with the structure of the air duct in advance.
It has revolutionized the traditional model of installing pipes first and then conducting insulation treatment for air ducts, significantly enhancing installation efficiency and system performance. It is widely applied in the ventilation and air conditioning (HVAC) field of modern buildings.
Ii. Structural Analysis
Insulation layer: Closed-cell foam materials such as polyurethane (PU) or polyisocyanurate (PIR) are mostly used. For instance, the density of PU foam is often 50kg/m³. These materials have extremely low thermal conductivity. The thermal conductivity of PU can reach 0.022W/m · K, which can effectively prevent heat transfer and reduce the energy consumption of air conditioning systems.
Inner and outer protective layers
The inner side is often made of smooth aluminum foil. In places with high requirements for air cleanliness such as clean rooms, it can prevent dust accumulation and ensure air cleanliness.
The exterior is selected based on the usage scenario. For the interior, 60-micron embossed aluminum foil is generally used, which takes into account both aesthetics and a certain degree of protection. Outdoors or in places with high strength requirements, 180-micron smooth aluminum plates or pre-painted galvanized steel plates are used to enhance wind resistance and corrosion resistance.
Iii. Performance Advantages
High efficiency and energy conservation: The low thermal conductivity insulation layer significantly reduces heat loss, lowers the energy consumption required by the air conditioning system to maintain indoor temperature, reduces heating and cooling loads as well as fan energy consumption, and can save a large amount of electricity bills in the long term.
Lightweight and convenient: Compared with traditional galvanized iron air ducts, its weight can be reduced by up to 72%, making it easy to transport and install. It is particularly suitable for renovation projects with limited load-bearing capacity of building structures, reducing construction difficulty and the impact on building structures.
Good air tightness: The overall structural design and installation process effectively reduce the air leakage rate of the air duct system, ensure stable ventilation volume, and improve the overall operational efficiency of the air conditioning system.
Antibacterial and anti-corrosion: The aluminum foil protective layer has antibacterial properties and can inhibit the growth of bacteria. The outer metal material has undergone special treatment, which can effectively resist corrosion even in harsh environments such as dampness and extend the service life of the air duct.
Iv. Application Fields
Commercial buildings: shopping malls, hotels and other Spaces, meet the ventilation needs of large and complex Spaces, and their high-efficiency and energy-saving features reduce operating costs.
Industrial plants: Production workshops with requirements for temperature, humidity and air quality, such as electronics and food processing workshops, ensuring a stable production environment and having antibacterial and anti-corrosion properties that are suitable for industrial environments.
Public buildings such as hospitals, schools, and stadiums, with good air tightness and antibacterial properties, ensure the air quality and hygiene safety of densely populated places.
V. Installation and Maintenance
During installation, due to its light weight and high degree of prefabrication, it can be processed in sections and quickly spliced on site, completing installation in one step without the need for secondary insulation operations, thus shortening the construction period.
Daily maintenance is simple. Just regularly check the appearance for any damage and ensure that the connection points are well sealed. Its sturdy and durable feature reduces the trouble of frequent repairs, and its service life can reach more than 20 years.
