Covcua txias cua tshuab ziab khaub ncawsyog cov cuab yeej siv cua tshuab ziab khaub ncaws uas siv lub hauv paus ntsiab lus kom khov cov dej noo hauv cov cua compressed hauv qab cov dej lwg, condensing nws mus rau hauv cov dej ua kua los ntawm cov cua compressed thiab tawm nws. Txwv tsis pub los ntawm qhov dej khov ntawm dej, theoretically nws dew point kub yuav nyob ze rau 0 degrees. Hauv kev xyaum, qhov dej lwg taw tes kub ntawm lub tshuab ziab khaub ncaws zoo tuaj yeem ncav cuag li 10 degrees.
Raws li qhov sib txawv ntawm lub tshav kub exchangers ntawmcua txias cua tshuab ziab khaub ncaws, tam sim no muaj ob hom tshuab ziab khaub ncaws nrog tube-fin heat exchangers thiab phaj-hom kub exchangers (hu ua phaj exchangers) nyob rau hauv kev ua lag luam. Vim nws cov thev naus laus zis paub tab, cov qauv kev cog lus, kev ua haujlwm siab thermal, thiab tsis muaj kev ua qias tuaj thib ob, lub tshuab ziab khaub ncaws cua sov tau dhau los ua lub ntsiab ntawm cov tshuab ziab khaub ncaws. Txawm li cas los xij, muaj ntau qhov tsis zoo hauv kev tsim thiab siv cov qub tube-fin heat exchanger. Lub luag haujlwm tseem ceeb hauv cov hauv qab no:
1. Loj loj:
Tube-fin heat exchanger feem ntau muaj kab rov tav cylindrical qauv. Txhawm rau hloov mus rau cov duab ntawm cov khoom siv hluav taws xob, tag nrho cov qauv tsim ntawm lub tub yees thiab tshuab ziab khaub ncaws tsuas tuaj yeem ua raws li cov txheej txheem kev sib hloov cua sov. Yog li ntawd, tag nrho lub tshuab yog loj, tab sis qhov chaw sab hauv yog qhov khoob. , tshwj xeeb tshaj yog rau cov khoom siv nruab nrab thiab loj, 2/3 ntawm qhov chaw hauv lub tshuab tag nrho yog cov khoom seem, yog li ua rau qhov chaw tsis tsim nyog.
2. Ib qho qauv:
Tube-fin heat exchanger feem ntau txais ib qho kev tsim ib-rau-ib, uas yog, qhov sib xyaw ua haujlwm muaj peev xwm cua tshuab ziab khaub ncaws sib raug rau cov khoom siv hluav taws xob sib txuas, uas ua rau muaj kev txwv hauv cov txheej txheem ntau lawm thiab tsis tuaj yeem hloov pauv tau hauv kev sib xyaw ua ke. Txoj hauv kev siv tib lub tshuab hluav taws xob los tsim cov tshuab ziab khaub ncaws nrog cov peev txheej sib txawv, uas yuav ua rau muaj kev nce ntxiv hauv cov khoom siv raw khoom.
3. Qhov nruab nrab kub pauv efficiency
Lub tshav kub hloov hluav taws xob ntawm lub raj-fin heat exchanger feem ntau yog li 85%, yog li nws yog ib qho tsim nyog kom ua tiav cov txiaj ntsig zoo tshaj plaws ntawm cov cua sov.Qhov tsim ntawm tag nrho cov tub yees yuav tsum tau nce ntau dua 15% raws li kev xam qhov yuav tsum tau ua. tub yees muaj peev xwm, yog li nce tus nqi system thiab kev siv hluav taws xob.
4. Cua npuas nyob rau hauv tube-fin tshav kub exchanger
Lub square fin qauv thiab lub plhaub voj voog ntawm lub raj-fin heat exchanger tawm qhov chaw tsis muaj cua sov hauv txhua qhov channel, ua rau huab cua bubbling. Cov baffles ntawm cov evaporator tso cai rau qee qhov cua compressed kom dim yam tsis muaj kev sib pauv cua sov. Qhov no txwv cov dej lwg taw tes ntawm cov khoom siv roj, thiab nce lub peev xwm txias tsis tuaj yeem daws qhov teeb meem. Yog li ntawd, lub siab dew point ntawm lub raj-fin khov tshuab yog feem ntau siab dua 10 ° C, uas tsis tuaj yeem ncav cuag qhov zoo tshaj 2 ° C.
5. Tsis zoo corrosion kuj
Tube-fin heat exchangers feem ntau yog ua los ntawm cov raj tooj liab thiab txhuas fins, thiab lub hom phiaj nruab nrab yog cov roj compressed zoo tib yam thiab cov roj uas tsis yog corrosive. Thaum ua ntawv thov rau qee lub sijhawm tshwj xeeb, xws li cov tub yees tub yees, cov roj cua txias tshwj xeeb thiab tshuab ziab khaub ncaws, thiab lwm yam, muaj feem cuam tshuam rau corrosion, uas ua rau lub neej ua haujlwm luv luv, lossis tseem siv tsis tau txhua.
Nyob rau hauv kev saib ntawm cov yam ntxwv ntawm cov saum toj no-hais tube-fin tshav kub exchanger, lub phaj kub exchanger yuav ua tau rau cov shortcomings. Cov lus piav qhia tshwj xeeb yog raws li hauv qab no:
1. Compact qauv thiab me me
Lub phaj kub exchanger muaj ib tug square qauv thiab occupies ib tug me me qhov chaw. Nws tuaj yeem hloov tau yooj yim ua ke nrog cov khoom siv tub yees hauv cov khoom siv yam tsis muaj qhov chaw pov tseg ntau dhau.
2. Tus qauv yog hloov tau thiab hloov tau
Lub phaj kub hloov pauv tuaj yeem sib sau ua ke hauv ib qho qauv, uas yog, nws tuaj yeem ua ke rau hauv qhov tsim nyog ua lub peev xwm hauv 1 + 1 = 2 yam, uas ua rau kev tsim ntawm tag nrho lub tshuab hloov tau thiab hloov tau, thiab tuaj yeem tswj tau zoo dua. cov ntaub ntawv raw khoom.
3. Kev kub siab pauv kev ua haujlwm siab
Cov dej ntws ntawm cov phaj kub exchanger yog me me, cov phaj fins yog waveforms, thiab cov kev hloov ntawm cov hlaws yog qhov nyuaj. Ib lub phaj me me tuaj yeem tau txais qhov chaw sib pauv loj dua, thiab cov kev taw qhia ntws thiab cov dej ntws tau hloov tas li, uas ua rau cov kua dej ntau ntxiv. Kev cuam tshuam, yog li nws tuaj yeem ncav cuag turbulent flow ntawm tus nqi qis heev. Nyob rau hauv lub plhaub-thiab-lub raj cua kub exchanger, ob lub kua ntws nyob rau hauv lub raj sab thiab lub plhaub sab. Feem ntau, qhov ntws yog hla-ntws, thiab lub logarithmic nruab nrab kub qhov sib txawv kho coefficient yog me me. , Thiab phaj kub exchangers feem ntau yog co-tam sim no los yog counter-tam sim no ntws, thiab kev kho coefficient feem ntau yog hais txog 0.95. Tsis tas li ntawd, qhov ntws ntawm cov dej txias thiab kub hauv lub phaj kub hloov pauv yog qhov sib npaug ntawm qhov sib pauv ntawm cov cua sov uas tsis muaj bypass ntws, ua rau cov phaj kub hloov pauv qhov kub ntawm qhov kawg ntawm cov khoom siv hluav taws xob yog me me, uas tuaj yeem qis dua 1. °C. Yog li ntawd, lub siab dew point ntawm lub tub yees tshuab ziab khaub ncaws siv lub phaj kub exchanger tuaj yeem qis li 2 ° C.
4. Tsis muaj qhov tuag lub kaum sab xis ntawm kev sib pauv cua sov, qhov pib ua tiav 100% kev sib hloov cua sov
Vim nws cov txheej txheem tshwj xeeb, lub phaj kub hloov pauv ua rau lub tshav kub hloov pauv nruab nrab tag nrho hu rau lub phaj saum npoo yam tsis muaj cua sov hloov cov ces kaum, tsis muaj qhov ntws, thiab tsis muaj cua to. Yog li ntawd, compressed cua tuaj yeem ua tiav 100% tshav kub pauv. Xyuas kom ruaj ntseg ntawm cov dej lwg taw tes ntawm cov khoom tiav.
5. Zoo corrosion kuj
Lub phaj kub exchanger yog ua los ntawm txhuas alloy los yog stainless hlau qauv, uas muaj zoo corrosion kuj thiab tseem tuaj yeem zam cov pa phem thib ob ntawm compressed cua. Yog li ntawd, nws tuaj yeem hloov kho rau ntau lub sijhawm tshwj xeeb, suav nrog cov nkoj hauv hiav txwv, nrog cov roj corrosive Cov tshuaj lom neeg kev lag luam, nrog rau cov zaub mov nruj dua thiab kev lag luam tshuaj.
Ua ke cov yam ntxwv saum toj no, lub phaj kub exchanger muaj qhov zoo ntawm lub raj thiab fin heat exchanger. Piv nrog rau lub raj thiab fin heat exchanger, lub phaj kub exchanger yuav txuag tau 30% nyob rau hauv tib lub peev xwm ua. Yog li ntawd, kev teeb tsa ntawm lub tub yees system ntawm tag nrho lub tshuab tuaj yeem raug txo los ntawm 30%, thiab kev siv hluav taws xob kuj tuaj yeem txo los ntawm ntau dua 30%. Lub ntim ntawm tag nrho lub tshuab kuj tuaj yeem raug txo los ntawm ntau dua 30%.
Qhov tseeb zaus hloov phaj-hloov cov tub yees cua tshuab ziab khaub ncaws zaub
Post lub sij hawm: May-15-2023
