How to use insulation materials to protect the rail transit field
2019-04-22 11:46:30 From: Tradematt-Aerogel
Rail transit is a symbol of a city and plays an irreplaceable role in leading the urban development pattern. In urban rail transit projects, the use of good insulation measures and materials can significantly reduce production energy consumption and costs, improve the environment, and achieve better economic benefits.
At present, the objective environmental factors of urban rail transit engineering determine that the thermal insulation materials applied in their ventilation and air conditioning systems, chilled water pipes, etc. should have anti-aging, good volume stability, low water absorption, low moisture absorption rate, low water vapor transmission rate, and combustion. High level features. Taking Guangzhou as an example, in recent years, the insulation materials used in the tunnel section of the Guangzhou Rail Transit Project are foam glass, and the insulation material used in the non-tunnel section is an aerogel insulation blanket. .
In addition to the need for insulation measures in these areas, the insulation of the vehicle body is also essential.
There are three main types of heat transfer on urban rail transit vehicles: heat conduction, convection and radiation. The three modes of heat transfer are performed simultaneously while the vehicle is stationary and in operation. In order to reduce the discomfort caused by the heat transfer of the vehicle to the passengers, reduce the loss of energy of the vehicle, and improve the utilization of energy, the heat insulating material must be placed in the proper position inside and outside the vehicle. In combination with the insulation and fire protection requirements of the vehicle, the insulation material must also have the characteristics of non-combustible, non-toxic, heat preservation and sound absorption performance.