水上和水下提取次表层海水冷量的对比和分析

夏季的酷热迫使人们耗费大量能源以维持狭窄的温度环境,城市空调负荷节节攀升;近在身边的海中,表层以下巨大的水团静静地安卧,闲置着天然的冷量.冷媒水与海水在海中进行换热,是实现水下直接提取海洋冷量的构想.与陆上提取冷量方案的对比,可以证明其技术优势和节能效果.水下取冷方案甚至可应用于高盐度海区,并提高海水与冷媒水的换热温差,以提升海水冷量利用率;采用自来水作为冷媒水,不需要对海水进行处理,也不会出现管道堵塞的故障;作为空调系统回水的自来水,又可用作其它工业或生活用途.该方案在提供相同冷媒水流量的条件下,输水耗功减少幅度达到90%.

Analyses on Schemes of Drawing Cool Capacity from Subsurface Layer of Sea

To keep mankind's narrow living space comfortable a great deal of energy is consumed in hot summer and so,electricity load for city's air conditioning systems increases steadily,whereas an immense water-mass containing a large amount of cooling resource lies silently under the surface level of sea.The scheme of cooling medium exchanging heat with cold seawater in certain sea depth was put forward to realize the idea of abstracting cool capacity under the surface level of the sea.The technical advantages and energy saving effects were analyzed by comparing the schemes with the existing.It can be used in a saltier sea area also.This scheme improves the efficiency of cold seawater application based on a larger temperature difference between seawater and cooling medium.Tap water was selected as cooling medium so that no particular seawater treatment is needed and meanwhile,the pipelines would no longer be plugged.The return water of city's air conditioning system can be utilized for an industrial or living purpose.This scheme consumes only 10% energy of the existing one under the same quantity of cooling medium,thus its electric power is saved obviously.