什麼是冷／熱橋效應？

Question

何謂冷／熱橋效應（現象）？Heart Bridge？？

Answer 1

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.

Answer 2

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