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冷凝器換熱器列管式換熱器的結構比較簡單(dan)、緊湊、造價便宜,但管(guan)(guan)外(wai)(wai)(wai)不能機械(xie)清洗。此種(zhong)換熱(re)器管(guan)(guan)束(shu)連(lian)(lian)接(jie)(jie)在管(guan)(guan)板上(shang),管(guan)(guan)板分別焊在外(wai)(wai)(wai)殼(ke)(ke)兩端,并在其上(shang)連(lian)(lian)接(jie)(jie)有頂蓋(gai)(gai),頂蓋(gai)(gai)和(he)殼(ke)(ke)體(ti)裝(zhuang)有流體(ti)進(jin)出口接(jie)(jie)管(guan)(guan)。8通常在管(guan)(guan)外(wai)(wai)(wai)裝(zhuang)置一系列垂直(zhi)于(yu)管(guan)(guan)束(shu)的擋板。同時管(guan)(guan)子和(he)管(guan)(guan)板與外(wai)(wai)(wai)殼(ke)(ke)的連(lian)(lian)接(jie)(jie)都是剛性(xing)的,而(er)管(guan)(guan)內管(guan)(guan)外(wai)(wai)(wai)是兩種(zhong)不同溫度的流體(ti)。因此,當管(guan)(guan)壁與殼(ke)(ke)壁溫差較大時,由于(yu)兩者的熱(re)膨脹(zhang)不同,產生了很大的溫差應力,以至管(guan)(guan)子扭彎或使管(guan)(guan)子從管(guan)(guan)板上(shang)松(song)脫,甚(shen)至毀壞換熱(re)器。