1.What are the thermal properties of the color steel plate itself?
If a single-layer color steel plate is used, when the sun shines directly in summer, the metal substrate will quickly absorb heat and conduct it to the room, causing the indoor temperature to rise sharply, and the high temperature in the afternoon will continue until the evening, with a noticeable feeling of stuffiness. If a sandwich color steel plate is used, the thermal insulation performance will be greatly improved: Rock wool sandwich board: The thermal conductivity is about 0.045 W/(m・K), the thermal insulation is medium, and it is suitable for dry areas.
Polyurethane sandwich board: The thermal conductivity is about 0.025 W/(m・K), the thermal insulation is excellent, and it can effectively block heat conduction. The indoor temperature in summer can be close to that of a glass sun room.
2.How does it compare to a glass sun room?
The single-layer color steel plate sun room has fast metal heat conduction, no insulation layer, and heat is directly transmitted.
The insulation layer of the sandwich color steel sun room blocks heat but completely blocks out light (no natural light)
Ordinary glass sunrooms have high light transmittance, and direct sunlight heats indoor objects
Low-E glass sunrooms reflect infrared rays and reduce heat absorption
3.What effect does using sandwich panels have on temperature?
Avoid using single-layer color steel plates, and give priority to polyurethane sandwich panels with a thickness of more than 100mm (best thermal insulation effect), or rock wool sandwich panels (good fire resistance, suitable for dry areas in the north). The higher the density of the sandwich layer (such as polyurethane density ≥ 40kg/m³), the more stable the thermal insulation.
4.How to choose coating?
Choose a light-colored high-reflective coating that can reflect more than 50% of solar radiation heat, which is 3-5℃ cooler than a dark-colored coating.
Install a sunshade, sunshade net or photovoltaic panel on the outside to block direct sunlight from the surface of the color steel plate and reduce heat absorption from the source.
5.What is the key to temperature control in color steel plate sun room?
Increase ventilation design: Open an openable skylight on the top (such as an electric smoke exhaust window) to exhaust hot air based on the principle of hot air rising, reducing the indoor temperature by 5-8℃.
Install sliding windows or blinds on the side to form air convection and accelerate heat dissipation.
Internal auxiliary cooling: If you are sensitive to temperature, you can install a small air conditioner or air cooler, or lay insulation cotton on the top (increase the thickness by 2-3cm to further reduce heat conduction).