Manufacturing

Steel structure factories play an important role in the development of building steel structures in China, especially in light steel structure factories. In summer, the workshop is extremely hot and humid, and workers working inside sweat profusely, which is very uncomfortable. In severe cases, heatstroke often occurs on site. The cooling method for steel structure factories in summer is a difficult problem for many factories. The factory has a large area and high height. When the outdoor temperature is 35 ℃, the temperature inside the factory may be above 40 ℃, and the top may reach 50 ℃ or even higher. Traditional air conditioning and refrigeration systems have high investment costs for cooling, and subsequent electricity costs are even higher. Roof insulation cannot solve the fundamental problem, and the improvement effect is not good.

The non electric refrigeration technology independently developed by Hong Kong Chuangleng Technology Company reflects the vast majority of sunlight (reflectivity greater than 95%) and effectively radiates heat to outer space in the mid infrared direction (emissivity greater than 95%), achieving the cooling effect of "non electric refrigeration" without the need for energy or refrigerant. This passive cooling method does not require any additional energy input, greatly reducing dependence on fossil fuels, and does not produce pollutants during the cooling process, which is in line with the development concept of green, energy-saving and low-carbon. Radiation cooling is the use of this characteristic to transfer the heat of a building itself in the form of thermal radiation through an atmospheric window (8 μ m-13 μ m in which the atmosphere is transparent to electromagnetic waves) to outer space with a temperature of only 3 K, thereby achieving cooling. The principle of radiative cooling can be summarized as follows: an object emits a large amount of its own energy into outer space through the atmospheric window, while scattering or reflecting solar energy as much as possible in the solar region (0.2 μ m-2.5 μ m, which accounts for more than 98% of solar energy), reducing heat input and achieving the goal of cooling.

This passive cooling method does not require any additional energy input, greatly reducing dependence on fossil fuels, and does not produce pollutants during the cooling process, which is in line with the development concept of green, energy-saving and low-carbon. Widely used in various cooling scenarios such as buildings, automobiles, storage equipment, and outdoor electronic devices.