draught deflector meaning in English

挡风器

When temperature changed , in order to keep the outlet temperature of the cooling water stable , we can change the areas of draught deflectors , so the speed and area of the draught is changed , which will improve the safety and economy of the running assembling sets with the assumption of economizing water in winter
当外界温度发生变化时，为保证出塔水温不发生变化，可通过改变挡风板面积的方法，使进风口面积及进塔风速发生改变，进而保证出塔水温，保证冷却塔在冬季的正常运行。
This thesis chiefly analyzes the problem of exchanging heat quantity and the methods of the improvement of cooling tower in power station , compares and analyses the advantages and disadvantages of it . this thesis will discuss how to prevent natural - draft counter - flow wet cooling tower from freezing in winter , and compute the areas of draught deflectors
本文针对自然通风逆流式冷却塔冬季运行时的防冻处理，及预防结冰所应采取的措施进行研究和计算，提出以增加或减少挡风板的高度来控制出塔水温的方法，并对其进行计算分析。