无锡市科技发展有限公司换热器分公司  
主页导航 公司简介 新闻动态 产品展示 资讯荣誉 在线留言 联系方式  
 
BR1.0型板式热交换器
BR0.6型板式热交换器
BR0.3型板式热交换器
BR0.2型板式热交换器
BR0.15型板式热交换器
BR0.07型板式热交换器
板式热交换器板片
资质荣誉
在线留言
 

板式换热器使用注意事项

发布者:xinadmin2  发布时间:2013-12-30  点击:2881

本文由无锡市科技发展有限公司换热器分公司提供,更多板式换热器板式热交换器资讯请访问:www.shuangxiaowx.com 

 

    板片型式或波纹式应根据换热场合的实际需要而定。对流量大允许压降小的情况,应选用阻力小的板型,反之选用阻力大的板型。根据流体压力和温度的情况,确定选择可拆卸式,还是钎焊式。确定板型时不宜选择单板面积太小的板片,以免板片数量过多,板间流速偏小,传热系数过低,对较大的换热器更应注意这个问题。
    流程指板式换热器内一种介质同一流动方向的一组并联流道,而流道指板式换热器内,相邻两板片组成的介质流动通道。一般情况下,将若干个流道按并联或串联的方式连接起来,以形成冷、热介质通道的不同组合。
    流程组合形式应根据换热和流体阻力计算,在满足工艺条件要求下确定。尽量使冷、热水流道内的对流换热系数相等或接近,从而得到最佳的传热效果。因为在传热表面两侧对流换热系数相等或接近时传热系数获得较大值。虽然板式换热器各板间流速不等,但在换热和流体阻力计算时,仍以平均流速进行计算。由于“U”形单流程的接管都固定在压紧板上,拆装方便。
    在板式换热器的设计选型使,一般对压降有一定的要求,所以应对其进行校核。如果校核压降超过允许压降,需重新进行设计选型计算,直到满足工艺要求为止。

板式换热器

Plate type or corrugated type should be based on the actual needs of the heat exchange places.For large flow pressure drop allows small, should choose small resistance of the plate type, vice choose resistance of plate type.According to the fluid pressure and temperature, determine the removable type choice, or brazing type.Plate type is unfavorable choose veneer board piece area is too small, in order to avoid board piece of too many, small flow rate between plate, heat transfer coefficient is too low, for larger heat exchanger more attention should be paid to the problem.Process refers to a medium plate heat exchanger in a set of parallel flow, flow direction and flow within the dow plate heat exchanger, consisting of two adjacent plate medium flow channel.In general, several port connected in parallel or serial way, in order to form the different combination of cold and hot media channels.Process combination shall be computed according to the change of heat and fluid resistance, in satisfies the requirement of process conditions under the determined.Try to make the cold, hot water flow passage of convection heat transfer coefficient is equal or close to, to get the best heat transfer effect.Because the heat transfer surface on both sides of the convective heat transfer coefficient is equal or close to the heat transfer coefficient for larger values.Although velocity varies among different plate, plate heat exchanger in the change of heat and fluid resistance calculation, is still at an average velocity to calculate.Due to the "U" shape of the single process over all fixed on the pressure plate, tear open outfit is convenient.In design, selection of plate heat exchanger and generally have a request for the pressure drop, so deal with it to check.If check pressure drop exceeds allowed pressure drop, redesign to type selection calculation, until meet the technological requirements.

    
 
版权所有 无锡市科技发展有限公司换热器分公司 All Rights Reserved.
公司地址:无锡市坊前工业园锡义路57号 电 话:0510-82103153 传 真:0510-82136891 E_mail :138120677@qq.com