SEAG 透明隔熱膠膜
Solution 方案

Heat Transfer 傳熱

There are three ways in which heat moves from warm spaces to cold spaces:

CONDUCTION is the direct heat flow through a solid object such as a wall or a ceiling.

CONVECTION is heat movement through air, occurring when air is warmed. The warm expands, becoming less dense and rising.

RADIATION is the movement of heat rays across air spaces from one warm object to a cooler object.

When sunlight strikes an object, the energy is reflected, absorbed or transmitted. When direct sun strikes a typical window, a small portion of UV and infrared energy is reflected, some is absorbed by the glass and warms it, but most of the energy passes right through. When the transmitted sunlight hits surfaces inside the room, the short-wave radiant energy is absorbed and the floors, walls, furniture and other surfaces heat up. The heat from these objects is transferred to the surrounding air by convection or emitted in the form of long-wave radiation.

Some of the long-wave energy emitted inside the room finds its way to the window surface. This long-wave radiation is absorbed by ordinary window glass and then re-radiated or emitted as heat, either to the outdoors or back inside, from the glass surfaces.

Emissivity is the ability of a surface to absorb or emit long-wave radiation. Emissivity vanes from 1 (100% of long-wave radiation emitted) to 0 (0% emitted). Glass naturally has a high emissivity close to 1. However when SEAG Film is properly applied, the glass surface absorbs less and emits less long-wave radiant energy into the room.