Cov phaj kub hloov ua phaj yog hom tshiab ntawm cov hluav taws xob ua kom muaj zog siab ua kom muaj cov xim hlau txuas nrog cov xim tsis muaj qhov tsis zoo. Cov kab xev nyias nyias tau tsim nyob nruab nrab ntawm ntau cov paib, thiab kev hloov pauv kub yog nqa tawm los ntawm ib nrab daim hlau. Piv nrog kev sib xyaw plhaub-thiab-raj cua sov hloov pauv, nws cov tshav kub hloov hloov pauv yog qhov muaj ntau dua nyob rau hauv tib txoj kev ntws tawm thiab cov twj tso kua mis siv zog, thiab nws muaj qhov hloov pauv lub plhaub-thiab-raj cua sov hloov chaw hauv qhov tsim nyog. Cov phaj kub hloov pauv yog hom kub hloov ua los ntawm nias cov hlau nyias daim hlau ua kom kub hloov daim hlau nrog ib hom tsis tuaj yeem ua kom zoo nkauj, tom qab ntawd txhav lawv thiab ua kom nrawm nrog cov ntu tawg thiab thooj. Cov kua dej ua hauj lwm ntws los ntawm qhov nqaim thiab qhov tawm zoo uas tsim los ntawm ob daim phiaj. Cov kua kub thiab dej txias kis los ntawm cov channel ntws hauv kab xwm, thiab muaj cov phaj interlayer nyob hauv nruab nrab kom cais cov kua thiab sib pauv hloov kub los ntawm daim phiaj. Tus qauv thiab kev hloov pauv kub ntawm cov phaj kub hloov tawm txiav txim siab tias nws muaj cov yam ntxwv ntawm cov qauv zoo nkauj, hneev me me, siab hloov mus rau qhov ua tau zoo, kev ua haujlwm loj yooj, kev ua haujlwm dav, ntau qhov kev ua haujlwm kub, thiab kev yooj yim rau kev teeb tsa thiab tu. Qhov nruab nrab ntawm qhov kub nruab nrab ntawm ob qho tawm yuav ua tau me npaum li 1 ℃, thiab kev ua haujlwm kub rov qab tuaj yeem ncav cuag ntau dua 99%. Nyob hauv tib lub siab poob, qhov kub hloov ntawm cov phaj kub ua kom sov yog li 3 txog 5 npaug ntawm qhov hluav taws xob cua hloov tubular, tuav 1/3 ntawm nws thaj chaw thiab tsuas yog 2/3 ntawm nws cov khoom siv hlau.
Vim hais tias cov phaj ua kom tshav kub yog cov khoom siv hloov ua kom sov hloov nrog kev ua haujlwm siab, txuag hluav taws xob, txuag khoom thiab txuag peev. Muaj feem ntau yog ob hom phaj kub sib hloov: hom thav duab (tshem tawm) thiab hom brazed. Cov ntawv phaj yog mas herringbone corrugated daim hlau, kab rov tav ncaj corrugated daim hlau thiab daim hlau zoo li daim hlau.
