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如果知道冷水机组的制冷量 冷水机组的冷却塔正确选型

2016-06-14 16:13:03   来源:http://sxt.qblzl.com       
导读:冷却塔的选型技巧—知道冷水机组制冷量,怎么选择冷却塔?需要的主要参数:冷却水量(m³ H),进、出水温度(℃),大气压力(Pa),大气干湿球温度(℃),噪声值(dB(A)) 然后查冷却塔选用曲线。想了解更多关于冷水机组冷却塔选择的内容,可以拨打北京奇保良制冷设备有限公司24小时服务热线:4006345365
        很多时候,冷水机在运行的过程中,需要冷却水塔的帮助。所以我们在购买冷水机组后,需要根据实际需求配置冷却水塔,一把提高整个机组性能和保障机组正常运行。如果我们在知道冷水机组的制冷量的情况下,该怎么选择冷却水塔呢?下面小编来教大家关于冷水机组配备冷却水塔的选型技巧。

冷却塔的选型技巧—冷却塔的作用:

        冷却塔用来冷却换热器排出的热水。在冷却塔中,热水从塔顶向下喷淋成水滴或水膜状,空气由下向上与水滴或水膜逆向流动或水平方向交流流动。在气水接触过程中,进行热交换,使水温降低。

冷却塔的选型技巧—冷却塔的分类:

        冷却塔的型式很多,根据空气进入塔内的情况分自然通分和机械通风两大类。目前常见的机械通风型的冷却塔是抽风逆流或横流式冷却塔。空气由塔顶抽风机吸入塔内,空气的流动速度为90-210m/min。

冷却塔的选型技巧—冷却塔选型的注意事项:

        选择冷却塔时首先应注意产品样本给出的性能参数与该产品实际性能的差距。其中包括产品样本的不实及工程建设地点的气象条件与产品标定性能的测试条件不同等因素。要按照工和地点的气象条件进行校核。并应根据该产品的工程应用经验采取相应的调整措施。有时不得不采用较大的裕量系数。冷却塔一般安装在高层建筑的裙房里面。因距离主楼较近,所以应考虑冷却塔的吸风距离、防火、噪声、漂雾等问题。

冷却塔的选型技巧—知道冷水机组制冷量,怎么选择冷却塔:

       需要的主要参数:冷却水量(m³/H),进、出水温度(℃),大气压力(Pa),大气干湿球温度(℃),噪声值(dB(A)).然后查冷却塔选用曲线。
A、冷水机组所需要冷却水的流量及其参数
W=Q/c(tw1-tw)  kg/s
Q—冷却塔排走热量,KW,压缩式制冷机,取制冷机负荷的1.3倍左右;吸收式制冷机,取制冷机负荷的2.5倍左右;
c—水的比热,常温时c=4.1868kj/(kg.℃);
tw1-tw2—冷却塔的进出水温差,压缩式制冷机,取4~5℃;吸收式制冷机,取6~9℃。
B、简要经验值计算公式:
       设备总冷量(KW)*856(大卡)/3000=冷却塔水流量
但在此基础上加上25T--100T=冷却塔实际规格流量或冷却塔水流量*1.2~1.3=冷却塔实际规格流量。

        以上内容,大家可以参考。如果你有关于冷水机方面的疑问,或者想了解更多关于冷水机组冷却塔选择的内容,可以拨打北京奇保良制冷设备有限公司24小时服务热线:4006345365.
 
 
 

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