板(ban)(ban)(ban)(ban)片型(xing)式(shi)或波紋式(shi)應(ying)根(gen)據換熱(re)場合的(de)(de)實(shi)際(ji)需要而定。對流量大(da)允許壓降小的(de)(de)情(qing)況(kuang),應(ying)選(xuan)用阻力(li)小的(de)(de)板(ban)(ban)(ban)(ban)型(xing),反之(zhi)選(xuan)用阻力(li)大(da)的(de)(de)板(ban)(ban)(ban)(ban)型(xing)。根(gen)據流體壓力(li)和溫度的(de)(de)情(qing)況(kuang),確(que)定選(xuan)擇可拆卸式(shi),還(huan)是釬焊式(shi)。確(que)定板(ban)(ban)(ban)(ban)型(xing)時不(bu)宜選(xuan)擇單板(ban)(ban)(ban)(ban)面積太(tai)小的(de)(de)板(ban)(ban)(ban)(ban)片,以免板(ban)(ban)(ban)(ban)片數量過多(duo),板(ban)(ban)(ban)(ban)間流速(su)偏小,傳熱(re)系數過低,對較(jiao)大(da)的(de)(de)換熱(re)器更應(ying)注意這個問(wen)題。
流(liu)程和流(liu)道的選(xuan)擇
流(liu)程指(zhi)(zhi)板(ban)式換熱器內一種介質(zhi)同(tong)(tong)一流(liu)動方向的一組(zu)并聯流(liu)道(dao),而流(liu)道(dao)指(zhi)(zhi)板(ban)式換熱器內,相鄰(lin)兩板(ban)片組(zu)成的介質(zhi)流(liu)動通道(dao)。一般情況下,將若干個流(liu)道(dao)按并聯或串聯的方式連接起來(lai),以形成冷、熱介質(zhi)通道(dao)的不同(tong)(tong)組(zu)合(he)。