Plastic spray coating helps plastic sprayed energy-saving bridge save energy
Publish Time: 2024-12-12
Plastic spray coating plays a critical role in energy saving in plastic sprayed energy-saving bridge, and its energy saving principle is mainly reflected in the effective intervention in the heat transfer process.From the perspective of heat conduction, plastic spray coating usually has a low thermal conductivity. When the external heat tries to enter the bridge structure or the heat inside the bridge wants to dissipate outward, the coating acts as a heat insulation barrier, slowing down the heat conduction speed inside the coating. For example, in the high temperature environment in summer, the heat brought by the hot air and strong sunlight radiation from the outside can only slowly pass through the coating to the main structure of the bridge after contacting the plastic spray coating, thereby significantly reducing the temperature rise of the internal structure of the bridge.In terms of thermal radiation, the surface characteristics of the coating play an important role. Some plastic spray coatings use light-colored and highly reflective materials, which can reflect a large amount of solar radiation heat back into the atmosphere, reducing the bridge's absorption of solar radiation energy. Compared with the bridge without plastic spraying, its surface can reflect a considerable proportion of heat energy, just like putting a "heat-insulating reflective coat" on the bridge, greatly reducing the temperature rise caused by solar radiation.For heat convection, the presence of the plastic spray coating changes the airflow heat exchange conditions on the bridge surface. The surface roughness and texture structure of the coating will affect the flow pattern and heat exchange efficiency of the air on its surface. The relatively smooth and continuous surface of the plastic spray coating can reduce the convection heat transfer coefficient between the air and the bridge, making the heat exchange between the air and the bridge difficult, further reducing the heat loss or absorption.Combining the above three mechanisms of heat conduction, heat radiation and heat convection, the plastic spray coating effectively regulates the heat exchange between the bridge and the external environment. In summer, reducing heat input can reduce the energy consumption of refrigeration equipment such as air conditioners, and cool down the bridge's ancillary facilities and the surrounding environment; in winter, slowing down heat loss helps maintain the temperature of the bridge structure, reducing structural damage caused by low temperature and energy consumption for heating and keeping warm. Through this all-round heat control, the plastic sprayed coating achieves significant energy-saving effects for the plastic sprayed energy-saving bridge, improves the energy efficiency and economy of the bridge, extends the service life of the bridge and reduces maintenance costs.
