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空气在不同温度下所能容纳的水蒸气量不同,气温愈高,容纳的水蒸气量愈多,其极限值称为饱和蒸气含量。当空气中水蒸气的含量超过饱和水蒸气的含量时,多余的水蒸气就会结成液体的水,称为结露。寒冷地区的外墙应有足够的保温性能,当室外气温为负温时,外墙如果保温性能好,外墙内表面温度应该
The amount of water vapor the air can hold at different temperatures is different. The higher the temperature, the greater the amount of water vapor that is contained. The limit value is called the saturated vapor content. When the content of water vapor in the air exceeds the content of saturated water vapor, the excess water vapor will form a liquid water, which is called condensation. The outer wall of a cold area should have sufficient thermal insulation performance. When the outdoor temperature is negative, the outer wall, if the thermal insulation performance is good, the inner surface temperature of the outer wall should be