[China Glass Net] The thermal design of glass processing equipment for glass processing equipment should pursue the initiative and enthusiasm of design function, and change the passive defense to the active use of energy design ideas, in order to reduce the heat loss and energy consumption of heating in winter heating, In order to reduce the heat ingress and energy consumption of air conditioning and refrigeration in summer, the development trend of thermal design of glass curtain wall is to pursue the greenhouse effect for the curtain wall with heating and heating, and to achieve the effect of cold room for the curtain wall with air conditioning and cooling. No matter what kind of curtain wall, it will pursue the rational use of solar energy.
The dynamic curtain wall is a good development direction. The photoelectric curtain wall composed of the photovoltaic panel system and the curtain wall system is also an application development direction of actively utilizing solar energy. The intelligent glass curtain wall that comprehensively uses light energy, heat energy and electric energy is an ideal development direction. . When glass processing equipment is used for curtain wall thermal design, it must analyze and study its complex heat transfer process and heat transfer mode.
There are roughly three ways to heat transfer the glass curtain wall:
The first is the heat transfer of the glass and aluminum alloy metal sash: heat transfer through the heat transfer of the single-layer glass, heat transfer through the metal sash, and reduction of the radiation heat transfer through the coating layer of the glass.
The second is the heat exchange between the inner surface of the curtain wall and the indoor air and the indoor environment: convective heat transfer between the inner surface and the indoor air, and radiation heat exchange between the inner surface and the indoor environment.
The third is the heat exchange between the outer surface of the glass curtain wall and the surrounding air and the external environment; the convective heat transfer between the outer surface and the surrounding air, the radiation heat exchange between the outer surface and the external environment, and the long-wave radiation heat exchange between the outer surface and the space. .
The fourth is that the ordinary glass curtain wall adopts the beam-column structure of single-layer glass and aluminum alloy profiles, while the energy-saving glass curtain wall should be considered from the above three ways: the former approach has a great influence on the node design, and the thermal conductivity of the glass is designed. Insulating glass is used.
For the thermal conductivity of the aluminum frame, the design uses nylon 66 and other structural plastics to form a “broken bridgeâ€, which can increase the thermal resistance and reduce heat conduction, thus designing a heat-insulating curtain wall. On this basis, the second way and the third way are considered. The double-layer Low-E glass is used in the construction, and the upper and lower ends are convectively opened to design a dynamic curtain wall.
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