什麼是冷/熱橋效應?

何謂冷/熱橋效應(現象)?Heart Bridge??

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  • 1 decade ago
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    冷/熱橋效應(現象) 就是 cold bridge 或 thermal bridge ,建築或冷凍空調常用的術語。

    熱橋效應 不是 Heart Bridge也不是 Hot Bridge是 thermal bridge 。

    一條河,沒有橋,則兩岸不通。 一堵牆,沒有縫隙,則牆內冷氣或暖氣不會漏到牆外,沒有損失。 如果牆上有鋁窗,如果此鋁窗做得完全氣密,沒有縫隙,則牆內冷氣或暖氣也不會外洩,但是會由鋁窗的鋁框傳導到牆外(鋁是很好的熱導體),使得牆內冷氣或暖氣有所損失,因為鋁框的鋁板是連續一體的,這個鋁框就是一個熱橋或冷橋。同樣的,廚房抽油煙機的排氣管穿過牆壁或窗子到室外,這個排氣管孔道也是一個熱橋或冷橋。

    Cold-bridging / Thermal-bridging 翻譯成中文剛好是冷橋與熱橋,讓人誤以為是兩個相對的事情,其實是指同一件事情。

    Cold-bridging / Thermal-bridging

    Cold- or thermal-bridges are sections through the fabric of significantly lower thermal resistance than the rest of the construction. These happen particularly around openings and at junction of walls/floors and walls/roofs. Concrete and metal framed buildings or facades are particularly prone to cold-bridging unless these elements are individually insulated. Cold-bridging is the result of localised areas of low thermal resistance caused by the presence of elements with a high thermal conductivity.

    Typical examples are non-thermally broken metal frames, concrete frames, openings etc.

    The result of thermal-bridging is localised areas of increased heat loss/gain and possible increased condensation risk, mould growth (which can also cause respiratory and other allergies in sensitive people), pattern staining and corrosion.

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  • 5 years ago

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