Hauv cov nroj tsuag uas muaj neeg coob coob, qhov chaw hauv pem teb yog qhov hwm. Lub plhaub PTFE-thiab- tube exchanger tsim los rau kub kua qaub txias tuaj yeem tuav lub hneev taw ntawm lub tsheb me me, xav tau cov kav dej dav dav, kev txhawb nqa, thiab kev tshem tawm. Ib qho kev sib hloov ua los ntawm qhov tsis zoo graphite thaiv ua haujlwm zoo tib yam thermal yuav nyob tsuas yog ib feem ntawm qhov chaw ntawd, qee zaum me me txaus los zaum ntawm lub rooj zaum hauv chav kuaj. Qhov sib txawv yog tsav los ntawm ib qho khoom tseem ceeb ntawm cov khoom siv: thermal conductivity.
Hauvimpervious graphite vs PTFE thermal conductivity, qhov sib piv txhais tsis tau tsuas yog kev ua tau zoo tab sis kuj yog cov khoom siv loj, qhov hnyav, thiab kev ua haujlwm zoo.
Thermal conductivity raws li tus qauv tsim -Txoj kev txwv
Lub luag haujlwm tseem ceeb hauv Kev Kub Kub Exchanger Sizing
Qhov loj me ntawm cov khoom siv hluav taws xob yog tswj hwm feem ntau los ntawm qhov ua tau zoo thermal zog thauj mus los ntawm phab ntsa cais ob cov kua dej. Ntau dua thermal conductivity txo thermal kuj, tso cai rau:
Me me tshav kub hloov chaw
Shorter flow paths
Ntau compact geometry
Txo cov khoom ntim
Thaum conductivity nce ntau heev, exchanger architecture hloov fundamentally es incrementally.
Kev sib piv ntawm cov khoom siv conductivity
PTFE raws li qis -Kev coj tus kheej hauv paus
PTFE nthuav tawm cov thermal conductivity tsawg heev ntawm kwv yees li:
~0.25 W/m·K
Qhov no tso PTFE ntawm feem ntau thermally insulating engineering polymers. Raws li qhov tshwm sim:
Yuav tsum muaj thaj chaw loj
Ntev raj ntev yog tsim nyog
Nyias-phab ntsa geometries yog nyiam kom txo tau qhov tsis kam
PTFE exchangers feem ntau cia siab rau cov hlua txuas txuas ntxiv kom them nyiaj rau kev hloov pauv tsis zoo los ntawm cov khoom siv nws tus kheej.
Impervious Graphite raws li High -Cov Khoom Siv Hluav Taws Xob
Impervious graphite blocks nthuav tawm thermal conductivity feem ntau nyob rau hauv ntau yam ntawm:
80–120 W/m·K
Tus nqi no nyob ntawm:
Porosity qauv
Hom resin impregnation siv rau sealing
Txawm hais tias nrog cov kev hloov pauv no, cov khoom siv hluav taws xob tseem nyob ntau pua zaus siab dua PTFE.
Graphite yog ib txoj kev thermal superhighway qhov twg PTFE yog ib txoj kab winding lub teb chaws, thiab qhov loj ntawm cov exchanger qhia qhov txawv.
Tus qauv tsim thiab nws qhov cuam tshuam rau Compactness
Khoom Block Architecture ntawm Graphite Exchangers
Impervious graphite tsis yog fabricated li tubing. Hloov chaw, nws yog tsim los ua ib qho:
Cov khoom siv carbon-raws li thaiv
Precision-drilled nrog cov channel ntws
Sealed siv resin impregnation los xyuas kom meej cov tshuaj tiv thaiv
Qhov no geometry enables:
Nthuav packing ntawm tshav kub hloov chaw nto
Short conduction paths ntawm cov channel
High structural rigidity nyob rau hauv ib tug compact ntim
Qhov tshwm sim yog ib qho kev sib pauv uas ua rau thaj tsam ntawm thaj tsam ntawm ib chav tsev ntim.
PTFE Tube Bundle Architecture
PTFE-raws li exchangers cia siab rau:
Ntev, nyias nyias
Plhaub-thiab-tube lossis thaiv-tube configurations
Extended flow paths los them rau cov conductivity tsawg
Qhov no architecture inherently xav tau:
Loj dua lub cev hneev taw
Ntau dua ntim ntim
Cov kev xav tau kev txhawb nqa ntxiv
Thermal Performance Consequences
Thaum tshav kub kub hloov chaw yuav tsum tau
Vim tias graphite ua cov cua sov kom zoo:
Yuav tsum tau tshav kub hloov chaw yog txo qis heev
Phab ntsa thickness tuaj yeem nyob me me yam tsis muaj kev nplua nuj
Thermal gradients thoob plaws cov khoom siv yog tsawg
Hauv qhov sib piv, PTFE yuav tsum muaj qhov loj ntawm thaj tsam sib npaug kom ua tiav lub luag haujlwm sib npaug.
Teb rau Thermal Load
Graphite systems feem ntau nthuav tawm:
Ceev thermal teb
Kev siv hluav taws xob zoo hloov mus rau hauv cov seem compact
Ruaj khov kub profiles nyob rau hauv confined ntim
PTFE systems nthuav qhia:
Tsawg cua sov hloov mus los ntawm lub raj phab ntsa
Kev cia siab ntau dua ntawm cov kua dej- sab convection
Qhov kub ntau dua qhov sib txawv ntawm cov khoom siv ciam teb
Kev lag luam engineering-Offs
Qhov zoo ntawm Impervious Graphite
Cov txiaj ntsig tseem ceeb ntawm graphite exchangers muaj xws li:
Tshwj xeeb thermal conductivity (80-120 W / m·K)
Highly compact hneev taw
Txo cov khoom hnyav
High deg cheeb tsam ceev
Cov txiaj ntsig no ua rau graphite tshwj xeeb tshaj yog txaus nyiam hauv qhov chaw - txwv kev teeb tsa.
Cov kev txwv ntawm Graphite
Txawm hais tias nws cov thermal superiority, graphite nthuav qhia kev txwv:
Brittle mechanical cwj pwm
rhiab heev rau kev cuam tshuam thiab thermal shock
Txo kev sib raug zoo nrog oxidizing acids
Cov khoom siv ntau dua thiab cov nqi tsim khoom
Cov kev txwv no txwv nws lub qhov rais thov.
Qhov zoo ntawm PTFE Systems
PTFE muab:
Cov tshuaj inertness zoo heev
Kev tiv thaiv zoo rau cov kua qaub hnyav, nrog rau HF
Mechanical yooj
Ua siab ntev rau kev vibration thiab thermal txav
Cov khoom no ua rau PTFE ntau dua universally siv nyob rau hauv hnyav tshuaj ib puag ncig.
Daim ntawv thov xaiv kev txiav txim siab
Thaum Graphite dhau los ua qhov nyiam xaiv
Impervious graphite feem ntau xaiv thaum:
Muaj qhov chaw installation yog qhov txwv tsis pub tshaj
Chemistry tsis yog -oxidizing thiab sib xws nrog carbon- cov ntaub ntawv
High thermal efficiency yuav tsum tau nyob rau hauv daim ntawv compact
Tus nqi peev yog qhov thib ob los txo tus hneev taw
Thaum PTFE tseem xav tau
PTFE tseem tseem ceeb thaum:
Hydrofluoric acid los yog muaj zog oxidizers tam sim no
Mechanical robustness yuav tsum tau
Lub kaw lus yuav tsum zam kev vibration lossis tuav kev ntxhov siab
Ntev, hloov tau lub neej kev pab cuam yog qhov tseem ceeb tshaj compactness
Xaus
Qhov sib txawv ntawm impervious graphite thiab PTFE hloov tshav kub kev ua tau zoo yog tsim los ntawm thermal conductivity. Nrog cov nqi conductivity kwv yees li 80–120 W / m·K piv rau PTFE's ~ 0.25 W / m·K, impervious graphite ua rau me me, sib dua, thiab ntau dua compact exchanger tsim los ntawm nws cov khoom, drilled - thaiv architecture.
Hauvimpervious graphite vs PTFE thermal conductivity, qhov kev xaiv yog qhov kawg ntawm qhov sib npaug ntawm huab cua compactness thiab universal tshuaj tsis kam.
Impervious graphite's monumental thermal conductivity kom zoo dua txhais ncaj qha rau hauv cov qauv sib txuas sib txuas, ua rau nws nyiam cov tshuaj uas qhov chaw yog qhov kawg txwv thiab tshuaj lom neeg sib raug zoo tso cai rau nws siv. Qhov loj ntawm cov khoom siv hluav taws xob thaum kawg qhia txog cov yam ntxwv thermal ntawm nws cov khoom siv -txawm nws coj raws li txoj kev kub ceev ceev los yog txoj hauv kev qeeb.
