Plate heat exchangers muaj nyob rau hauv ntau daim ntawv thov kev lag luam thiab feem ntau yog siv cov phaj hlau los hloov cov cua sov ntawm ob lub kua.
Lawv txoj kev siv tau loj hlob sai vim tias lawv ua tau zoo dua cov khoom siv hluav taws xob sib txawv (feem ntau yog ib lub raj coiled uas muaj cov kua dej uas dhau los ntawm lub chamber uas muaj lwm cov kua dej) vim tias cov kua dej txias yog qhov loj dua qhov chaw sib cuag, uas ua rau cov cua sov hloov mus rau qhov kub thiab txias heev.
Hloov cov coils hla lub chambers, nyob rau hauv ib lub phaj kub exchanger, muaj ob alternating chamber, feem ntau ntawm nyias qhov tob, sib cais los ntawm corrugated hlau daim hlau ntawm lawv cov loj tshaj plaws nto.Lub chamber yog nyias, raws li qhov no xyuas kom meej tias feem ntau ntawm cov kua ntim yog nyob rau hauv kev sib cuag nrog lub phaj, pab thaum tshav kub kub exchanger.
Xws li cov pa hluav taws kub pauv tau ib txwm ua los ntawm kev siv stamping lossis cov pa ua haujlwm xws li kev kos duab sib sib zog nqus, tab sis tsis ntev los no photochemical etching (PCE) tau ua pov thawj tias yog cov khoom siv tau zoo tshaj plaws thiab raug nqi tsim nyog muaj rau daim ntawv thov nruj no.Electrochemical Machining (ECM) yog lwm yam thev naus laus zis uas tuaj yeem tsim cov khoom siv meej heev hauv cov khoom siv, tab sis cov txheej txheem no yuav tsum tau siv ntau heev. thiab kev tsim cov cuab yeej yog qhov nyuaj, thiab cov khoom ua haujlwm Cov corrosion ntawm cov cuab yeej siv tshuab thiab cov khoom siv tau ib txwm ua rau mob taub hau.
Feem ntau, ob sab ntawm lub phaj kub exchanger muaj cov yam ntxwv nyuaj heev uas qee zaum dhau ntawm lub peev xwm ntawm stamping thiab machining, tab sis tau yooj yim ua tiav siv PCE. Tsis tas li ntawd, PCE tuaj yeem tsim cov yam ntxwv ntawm ob sab ntawm phaj ib txhij, txuag lub sijhawm tseem ceeb, thiab cov txheej txheem tuaj yeem siv rau ntau yam hlau sib txawv, suav nrog stainless hlau, Inconel 617, aluminium, thiab titanium.
Vim muaj qee yam ntawm cov txheej txheem, PCE muab lwm txoj hauv kev zoo nkauj rau stamping thiab machining hauv daim ntawv hlau daim ntawv thov.Siv photoresist thiab etchant kom meej cov txheej txheem xaiv cov chaw, cov txheej txheem nta khaws cia cov khoom siv, burr- thiab tsis muaj kev ntxhov siab nrog huv si contours thiab tsis muaj tshav kub-tshuaj lom zones. Tsis tas li ntawd, cov kua dej etching nruab nrab ntawm cov qauv siv cov txheej txheem. thiab cov npoo susceptible rau corrosion.
Ua ke nrog qhov tseeb tias PCE siv tau yooj yim rov ua dua thiab tsis tshua muaj nqi digital lossis iav cov cuab yeej, nws muab cov txiaj ntsig zoo, muaj txiaj ntsig zoo thiab kev tsim khoom sai rau cov txheej txheem machining thiab stamping.Qhov no txhais tau tias kev txuag nyiaj tseem ceeb thaum tsim cov cuab yeej qauv, thiab tsis zoo li stamping thiab machining cov tswv yim, tsis muaj cov cuab yeej hnav thiab cov nqi cuam tshuam nrog kev txiav cov hlau.
Machining thiab stamping tuaj yeem tsim cov txiaj ntsig tsis zoo ntawm cov hlau ntawm txoj kab txiav, feem ntau deforming cov khoom raug machined thiab tawm hauv burrs, tshav kub-cuam tshuam cheeb tsam, thiab recast txheej. Tsis tas li ntawd, lawv siv zog ua kom tau raws li qhov kev daws teeb meem xav tau rau me me, ntau qhov nyuaj, thiab cov khoom siv hlau zoo dua xws li cov phaj kub sib txawv.
Lwm qhov tseem ceeb uas yuav tsum xav txog hauv kev xaiv cov txheej txheem yog qhov tuab ntawm cov khoom siv los ua machined.Tib txwm cov txheej txheem feem ntau ntsib teeb meem thaum thov rau nyias hlau ua, stamping thiab stamping yog feem ntau tsis tsim nyog, thaum laser thiab dej txiav ua rau disproportionate thiab unacceptable theem ntawm thermal deformation thiab cov ntaub ntawv fragmentation, raws li PCE yuav siv tau nyob rau hauv ib tug ntau yam ntawm cov ntaub ntawv xws li cov hlau, thickness ntawm cov hlau. exchangers, tsis compromising flatness, uas yog ib qho tseem ceeb rau kev ncaj ncees ntawm lub rooj sib txoos.tseem ceeb.
Ib qho chaw tseem ceeb uas cov phaj siv yog nyob rau hauv cov roj cell daim ntaub ntawv ua los ntawm stainless hlau, txhuas, npib tsib xee, titanium, tooj liab thiab ntau yam tshwj xeeb alloys.
Cov hlau phaj hauv cov roj hlwb tau pom tias muaj ntau yam zoo dua lwm cov ntaub ntawv.Tam sim no, lawv muaj zog heev, muaj cov khoom siv hluav taws xob zoo rau kev ua kom txias zoo dua, tuaj yeem tsim tau nyias nyias siv etching, ua rau cov pawg luv luv, thiab tsis muaj qhov taw qhia saum npoo tiav hauv cov channel.Plates tuaj yeem tsim thiab cov channel tsim tib lub sijhawm, thiab raws li tau hais los saum toj no, tsis muaj thermal stress yog tsim nyob rau hauv cov hlau.
Cov txheej txheem PCE ua rau muaj kev puas tsuaj ntau dua ntawm txhua lub nkoj tseem ceeb, suav nrog geometry, thiab tuaj yeem tsim cov khoom kom nruj cov specifications.
Lwm cov kev lag luam uas siv cov ntaub ntawv etched xws li linear motors, aerospace, petrochemical thiab chemical industries.Tom qab fabrication, cov phaj yog stacked thiab diffusion bonded los yog brazed ua ke los ua cov tub ntxhais ntawm lub tshav kub exchanger.Finished heat exchangers yuav ua tau mus txog rau lub sij hawm me dua li cov tsoos "plhaub thiab raj" qhov chaw zoo tshaj plaws exchangers.
Thaum tshav kub kub exchangers tsim siv PCE kuj muaj zog heev thiab muaj txiaj ntsig, muaj peev xwm tiv taus lub siab ntawm 600 bar thaum hloov mus rau qhov kub ntawm qhov kub ntawm cryogenics mus rau 900 degrees Celsius.Nws tuaj yeem ua ke ntau tshaj ob txoj kev ntws mus rau hauv ib chav tsev thiab ua tau raws li qhov yuav tsum tau muaj ntawm cov kav dej thiab cov li qub tau txo qis heev.Reaction thiab mixing kuj tseem tuaj yeem sib xyaw ua ke rau hauv ib qho kev sib hloov ntawm cov nqi hluav taws xob.
Niaj hnub no cov kev xav tau rau kev txuag hluav taws xob thiab qhov chaw txuag hluav taws xob tam sim no muaj teeb meem loj heev rau ntau tus engineers txoj kev loj hlob.The miniaturization ntawm ntau yam hauv hluav taws xob thiab microsystem technology tsim thiaj li hu ua thermal hot spots, uas yuav tsum tau pom cua sov dissipation los xyuas kom meej lub neej ntev kev pab cuam.
Siv 2D thiab 3D PCE, microchannels nrog txhais dav thiab qhov tob tuaj yeem tsim hauv cov khoom siv hluav taws xob rau kev xaiv cov cua sov dissipation media hauv cheeb tsam me tshaj plaws.Nws yuav luag tsis muaj kev txwv rau cov qauv tsim channel.
Tsis tas li ntawd, txij li cov txheej txheem etching txhawb kev tsim kho tshiab thiab geometric kev ywj pheej, turbulent flow as opposed to laminar flow tuaj yeem txhawb nqa los ntawm kev siv cov wavy channel npoo thiab qhov tob.Turbulent flow hauv nruab nrab cua txias txhais tau hais tias cov coolant nyob rau hauv kev sib cuag nrog lub tshav kub qhov chaw yog tas li hloov, uas ua rau tshav kub pauv ntau npaum li cas corrugations yog tsis yooj yim sua los ntawm cov cua sov channel los yog CE. - txwv tsis pub tsim siv lwm txoj kev tsim khoom.
PCE tus kws tshaj lij micrometal GmbH siv cov khoom sib tw optoelectronic los tsim cov khoom ua haujlwm zoo nrog rau qib siab ntawm qhov raug rov ua dua.
Ib tus neeg microchannel daim hlau tuaj yeem txuas nrog (xws li, los ntawm diffusion welding) rau ntau yam 3D geometries.micrometal siv cov kev paub txog kev sib koom tes uas muab cov neeg siv khoom xaiv los yuav ib tus neeg microchannel daim hlau los yog ib qho microchannel heat exchanger blocks.
Ib yam khoom uas muaj cov khoom siv hlau thiab muaj ob lossis ntau yam tshuaj, yam tsawg kawg yog ib qho ntawm cov hlau.
Txo cov dej kub nce ntawm lub cuab yeej / workpiece interface thaum lub tshuab machining.Feem ntau nyob rau hauv daim ntawv ua kua, xws li soluble lossis tshuaj tov (semi-synthetic, hluavtaws), tab sis kuj tuaj yeem ua rau huab cua los yog lwm yam gases.Vim nws muaj peev xwm nqus tau cov cua kub ntau, dej tau dav siv los ua lub tshuab ua kom txias thiab cov cab kuj rau ntau yam kev sib xyaw ua ke, thiab cov dej sib xyaw ua ke ntawm cov dej sib xyaw ua ke, thiab cov dej sib xyaw ua ke.semi-synthetic txiav kua;soluble roj txiav kua;hluavtaws txiav kua.
1. Kev faib tawm ntawm cov khoom siv hauv cov roj, kua, lossis cov khoom uas zoo li ua kom muaj cov khoom sib xws hauv txhua qhov chaw.2.Ib qho atom lossis molecule spontaneously txav mus rau qhov chaw tshiab hauv cov khoom.
Kev ua haujlwm nyob rau hauv uas cov hluav taws xob tam sim no ntws nruab nrab ntawm ib qho chaw ua haujlwm thiab cov khoom siv hluav taws xob los ntawm electrolyte.Initiates tshuaj lom neeg cov tshuaj tiv thaiv uas yaj cov hlau los ntawm qhov chaw ua haujlwm ntawm tus nqi tswj. Tsis zoo li cov txheej txheem txiav, workpiece hardness tsis yog qhov tseem ceeb, ua ECM haum rau cov ntaub ntawv nyuaj-rau-tshuab.
Kev ua haujlwm zoo ib yam li lub tshuab hluav taws xob hauv lub tshuab cuab yeej, lub tshuab hluav taws xob tuaj yeem xav tau raws li tus qauv ruaj khov hlau nplaum rotary lub cev muaj zog, txiav axially nyob rau hauv qhov chaw, ces stripped thiab nteg flat.Qhov zoo tshaj ntawm kev siv linear motors tsav axis yog tias nws tshem tawm cov inefficiencies thiab mechanical sib txawv tshwm sim los ntawm lub pob ntsia hlau tshuab dhos tshuab siv nyob rau hauv feem ntau CNC cov cuab yeej.
Qhov dav dav dav ntawm cov khoom siv hauv qhov chaw ntxhib los mos.Suav nrog txhua qhov tsis sib xws spaced wider tshaj qhov ntsuas kev txiav tawm qhov chaw.Saib Flow;dag;Roughness.
Dr. Michael J. Hicks yog Tus Thawj Coj ntawm Lub Chaw rau Kev Lag Luam thiab Kev Tshawb Fawb Kev Lag Luam thiab George thiab Francis Ball Distinguished Professor of Economics ntawm Ball State University's Miller School of Business.Hicks tau txais nws Ph.D.thiab MA hauv Kev Lag Luam los ntawm University of Tennessee thiab BA hauv Kev Lag Luam los ntawm Virginia Tub Rog Lub Tsev Haujlwm.Nws tau sau ob phau ntawv thiab ntau tshaj 60 cov ntawv tshaj tawm kev kawm tsom mus rau lub xeev thiab hauv nroog pej xeem txoj cai, suav nrog txoj cai se thiab kev siv nyiaj thiab cuam tshuam ntawm Walmart rau kev lag luam hauv zos.