Due to the lack of thermal mass in the wood construction, the required cooling by means of overnight ventilation is ensured by cross ventilation.

由于木结构缺乏保温特性，所需的冷却需要通过隔夜通风来确保交叉通风。

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And the generator has firstly adopts airproof circulating ventilation system by after cooling of cooling water.

发电机首次采用冷却水二次冷却密封循环通风冷却系统。

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At present, the ventilation pipes are generally made by concrete or PVC without holes on the pipe walls, whose cooling effects are realized by airflow and heat transference.

目前的路基通风一般采用路基内预埋实体混凝土管或PVC管，管壁不能透风，主要通过管内空气流动和热传导方式达到冷却路基的目的。

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Current HVAC systems get rid of stale, germ-ridden indoor air by cooling or heating fresh outdoor air and blowing it through ventilation ducts, a process that gobbles electricity.

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