"Ib lub chaw tshawb fawb muaj lub tshuab MRI, thiab nyob ze, lub tshuab hluav taws xob PTFE yog siv los ua kom txias cov txheej txheem tshuaj lom neeg. Puas muaj zog hlau nplaum puas cuam tshuam rau lub exchanger? Cov exchanger cov khoom hlau puas tuaj yeem cuam tshuam? Yuav ua li cas txog eddy tam sim no? Puas muaj kev txiav txim siab tshwj xeeb rau cov cheeb tsam zoo li no?" Txawm hais tias qhov xwm txheej no yog qhov tshwj xeeb, nws muaj ntau zuj zus hauv cov chaw tshawb fawb, cov chaw kho mob, thiab cov chaw tsim khoom siab heev uas cov cuab yeej siv tshuaj yuav tsum ua haujlwm ze rau cov khoom siv hluav taws xob muaj zog.
Electromagnetic Fields Hloov cov ntsiab lus tsim
Nyob rau hauv feem ntau muaj kev lag luam ib puag ncig, electromagnetic compatibility yog tsis tshua muaj xam thaum xaiv lub tshav kub exchanger. Corrosion resistance, kub muaj peev xwm, thiab mechanical durability feem ntau dominate qhov kev txiav txim. Txawm li cas los xij, qhov muaj cov hlau nplaum muaj zog lossis siab - zaus hluav taws xob hluav taws xob hloov pauv cov ntsiab lus tsim tag nrho.
MRI systems, kev teeb tsa radar, thiab cov khoom siv cua sov induction tag nrho tsim cov teb uas cuam tshuam nrog cov khoom siv hluav taws xob thiab sib nqus. Nyob rau hauv cov cheeb tsam no, txawm tias cov khoom me me xws li bolts, ntsuas kub, lossis cov mounting brackets tuaj yeem dhau los ua qhov cuam tshuam lossis muaj kev nyab xeeb. Cov lus nug yog vim li no tsis tsuas yog seb PTFE nws tus kheej puas tsim nyog, tab sis seb qhov ua tiav cov khoom siv hluav taws xob puas tuaj yeem ua haujlwm zoo thiab ntseeg tau hauv cov xwm txheej zoo li no.
PTFE ua Electromagnetically Neutral Khoom
Ib qho ntawm PTFE qhov txiaj ntsig tseem ceeb hauv cov cheeb tsam no yog cov khoom siv nws tus kheej yog qhov tseem ceeb pob tshab rau electromagnetic teb. PTFE tsis yog -sib nqus, hluav taws xob rwb thaiv tsev, thiab tsis txhawb eddy tam sim no. Tsis zoo li metallic heat exchangers, nws tsis distort magnetic teb los yog tsim electromagnetic cuam tshuam.
Cov cuab yeej no ua rau PTFE tshwj xeeb tshaj yog txaus nyiam nyob rau hauv ib puag ncig rhiab xws li cov chaw soj ntsuam tshawb fawb lossis cov chaw kho mob. Lub cev hloov pauv, yog tias tsim los ntawm PTFE lossis zoo ib yam tsis yog - cov khoom siv hluav taws xob, yuav tsis cuam tshuam ncaj qha nrog cov hlau nplaum. Hauv cov hlau nplaum muaj zog, txhua daim hlau tseem ceeb - xaiv cov khoom tsis yog- cov khoom siv hlau nplaum twb tshem tawm ntau yam teeb meem.
Txawm li cas los xij, qhov kev sib tw tsis xaus nrog lub polymer nws tus kheej. Cov khoom siv hluav taws xob feem ntau muaj xws li cov qauv tsim, kev sib txuas, thiab cov cuab yeej siv uas muaj cov hlau. Cov khoom no yuav tsum tau ua tib zoo txiav txim siab thaum lub exchanger yog siv nyob ze rau qhov muaj zog electromagnetic.
Kev sib cuam tshuam ntawm cov khoom siv hlau thiab cov teb sib nqus
Qhov kev txhawj xeeb tam sim ntawd hauv qhov chaw siab - teb yog qhov muaj cov khoom siv ferromagnetic. Piv txwv li, carbon steel Cheebtsam, tuaj yeem cuam tshuam rau cov chaw sib nqus, tsim kom muaj kev nyab xeeb thiab cov khoom siv tsis ruaj khov. Txawm tias qhov me me xws li fasteners lossis kev txhawb nqa brackets tuaj yeem ua teeb meem yog tias lawv yog tsim los ntawm cov khoom sib nqus.
Cov hlau uas tsis yog- hlau nplaum muab kev nyab xeeb dua. Austenitic stainless hlau, tshwj xeeb tshaj yog cov 300 series, feem ntau siv rau hauv cov ntawv thov vim tias lawv muaj cov lus teb sib nqus tsawg. Aluminium thiab qee cov ntaub ntawv sib xyaw kuj tuaj yeem tsim nyog thaum lub zog xav tau kev tso cai rau lawv siv. Thaum lub tshuab hluav taws xob PTFE yog tsim los siv ze rau thaj chaw muaj zog sib nqus, kev xaiv cov khoom tsis yog - cov khoom siv hlau nplaum ua ib qho tseem ceeb raws li qhov kev xaiv ntawm PTFE rau corrosion kuj.
Lwm qhov teeb meem yog lub peev xwm rau eddy tam sim no. Nyob rau hauv ib puag ncig qhov chaw sib nqus hloov lub sij hawm, xws li nyob ze cov khoom siv cua sov induction, cov khoom hlau conductive tuaj yeem tsim cov khoom siv hluav taws xob. Cov dej ntws no tuaj yeem tsim cov cua sov hauv zos, uas tuaj yeem cuam tshuam qhov kub thiab txias los yog puas tsuaj rau cov khoom nyob ze. Ua tib zoo xaiv cov khoom siv thiab kev xav zoo tsim tuaj yeem txo qhov cuam tshuam no.
RF cuam tshuam thiab khoom rhiab heev
Xov tooj cua zaus cuam tshuam qhia lwm txheej txheej nyuaj. Cov qauv hlau tuaj yeem ua raws li cov kav hlau txais xov, txawm tias tau txais los yog emitting electromagnetic signals. Hauv qhov chaw uas cov cuab yeej ntsuas ntsuas ua haujlwm nrog RF qhov chaw, txawm tias cov khoom siv tsis zoo xws li cov kav dej lossis cov khoom siv hluav taws xob tuaj yeem cuam tshuam cov teeb liab zoo.
Lub tshuab hluav taws xob PTFE tuaj yeem pab txo cov kev pheej hmoo no vim tias nws cov qauv tseem ceeb tsis yog -conductive. Txawm li cas los xij, sensors, connectors, thiab xaim cuam tshuam nrog lub exchanger yuav tsum tseem xav txog. Qhov ntsuas kub tsis zoo, piv txwv li, tuaj yeem khaws cov suab nrov electromagnetic uas cuam tshuam qhov ntsuas qhov tseeb. Nyob rau hauv ib puag ncig uas RF cuam tshuam yog kev txhawj xeeb, tag nrho cov qauv tsim yuav tsum hais txog ob qho tib si txhua yam thiab hluav taws xob sib raug zoo.
Instrumentation thiab Grounding Considerations
Instrumentation feem ntau nthuav tawm qhov kev sib tw loj tshaj plaws hauv qhov chaw electromagnetic. Kub sensors, siab transmitters, thiab tswj li qub feem ntau cia siab rau cov hluav taws xob sib txuas uas tuaj yeem cuam tshuam los ntawm cov hlau nplaum muaj zog lossis RF teeb liab. Tso cov khoom no tawm sab nraud ntawm thaj chaw siab tshaj plaws tuaj yeem txhim kho kev ntseeg tau zoo.
Kev cog qoob loo kuj yuav tsum tau ua tib zoo saib xyuas. Kev siv hauv av kom zoo tuaj yeem pab tiv thaiv RF khaws thiab txo cov suab nrov hluav taws xob, tab sis nyob rau hauv ib puag ncig xws li MRI cov chaw, cov tswv yim hauv av yuav tsum tau koom tes nrog lub chaw tsim hluav taws xob tag nrho. Ib txoj hauv kev hauv av uas ua haujlwm zoo hauv cov qauv kev lag luam yuav tsis tsim nyog nyob rau hauv qhov siab - kev tshawb fawb los yog ib puag ncig kev kho mob.
Thaum npaj tau zoo, tus exchanger nws tus kheej tuaj yeem nyob twj ywm electromagnetically nruab nrab thaum lub ntsuas ntsuas tau teem rau hauv txoj kev uas txo qis kev cuam tshuam. Qhov tshwm sim yog ib qho system uas tuav ob qho tib si thermal kev ua tau zoo thiab ntsuas qhov tseeb.
Yuav ua li cas cov Environments txawv ntawm Standard Installations
Hauv cov chaw tsim khoom lag luam, kev sib xyaw electromagnetic tsis tshua muaj feem cuam tshuam rau kev xaiv cov khoom siv hluav taws xob. Cov ntaub ntawv xws li carbon steel los yog cov pa stainless hlau feem ntau yog txaus, thiab hluav taws xob cuam tshuam tsis tshua muaj kev txhawj xeeb. Txawm li cas los xij, ib puag ncig uas muaj zog sib nqus los yog RF qhov chaw yuav tsum tau tsim ntau yam kev xav.
Lub tshav kub exchanger yuav tsum tau soj ntsuam tsis tsuas yog raws li ib tug thermal ntaus ntawv tab sis kuj raws li ib feem nyob rau hauv ib tug loj electromagnetic system. Kev xaiv cov khoom siv, kev tsim kho tshuab, thiab kev ntsuas ntsuas txhua qhov cuam tshuam seb tus exchanger tuaj yeem ua haujlwm zoo thiab ntseeg tau.
Xaus
PTFE cov khoom siv hluav taws xob tuaj yeem ua haujlwm tau zoo nyob ze thaj chaw muaj zog sib nqus lossis RF qhov chaw thaum lawv tsim nrog electromagnetic compatibility hauv siab. Cov khoom siv PTFE nws tus kheej tsis yog - sib nqus thiab hluav taws xob insulating, ua rau nws tsim nyog rau cov cheeb tsam rhiab heev. Cov kev txiav txim siab tseem ceeb suav nrog kev xaiv cov khoom tsis yog- cov khoom siv hlau nplaum, ua tib zoo tswj cov khoom siv hlau, thiab kev xav txog kev tso cov sensors thiab hluav taws xob sib txuas.
Thaum cov xwm txheej no tau hais txog, lub tshuab hluav taws xob PTFE tuaj yeem ua ke nrog MRI systems, induction cua sov, thiab lwm yam khoom siv siab - teb yam tsis muaj kev cuam tshuam lossis kev txhawj xeeb txog kev nyab xeeb. Qhov kev paub txog hluav taws xob electromagnetic no yog qhov tseem ceeb hauv kev tshawb fawb thiab cov chaw kho mob, qhov ntau hom khoom siv yuav tsum ua haujlwm ua ke yam tsis muaj kev cuam tshuam kev ua haujlwm lossis kev ntseeg siab.
