Qhov kub nce yog qhov tseem ceeb heev ua haujlwm Performance index ntawm lub cev muaj zog.Yog hais tias qhov kub thiab txias kev ua haujlwm tsis zoo, lub neej kev pab cuam thiab kev ntseeg siab ntawm lub cev muaj zog yuav raug txo kom tsawg.Cov yam ntxwv cuam tshuam rau qhov kub siab ntawm lub cev muaj zog, ntxiv rau kev xaiv cov qauv tsim ntawm lub cev muaj zog nws tus kheej, ntau yam hauv cov txheej txheem tsim khoom yuav ua rau qhov kub siab ntawm lub cev muaj zog tsis ua raws li qhov yuav tsum tau muaj kev nyab xeeb ntawm lub cev muaj zog.

Txhawm rau ntsuas qhov kub thiab txias ntawm lub cev muaj zog, nws yog ib qho tsim nyog yuav tsum tau ua qhov ntsuas kub ntawm qhov ntsuas kub ntawm lub cev muaj zog, thiab nws tsis tuaj yeem pom qhov teeb meem ntawm qhov kub thiab txias ntawm lub cev muaj zog los ntawm kev sim lub Hoobkas yooj yim.Ib tug loj tus naj npawb ntawm qhov tseeb thermal ruaj khov ntsuas qhov ntsuas ntawm lub cev muaj zog qhia tau tias: kev xaiv tsis raug ntawm cov kiv cua thiab cov khoom siv hluav taws xob tsis zoo muaj feem cuam tshuam rau qhov kub thiab txias, tab sis qhov teeb meem ntawm qhov kub thiab txias tshwm sim los ntawm dipping yam tseem muaj feem ntau ntsib, thiab cov kev kho ib txwm muaj. yog rov muab Paint ib zaug.

Txhawm rau txhim kho kev tsim khoom, feem ntau ntawm cov tshuab me me thiab nruab nrab tsis muaj lub hauv paus dipping xim.Ntxiv rau qhov dipping thiab ziab kom zoo ntawm winding nws tus kheej, qhov nruj ntawm cov tub ntxhais hlau thiab cov ncej kuj ncaj qha cuam tshuam rau qhov kawg kub ntawm lub cev muaj zog.Raws li txoj cai, lub mating nto ntawm lub hauv paus tshuab thiab cov tub ntxhais hlau yuav tsum tau zoo sib xws, tab sis vim lub deformation ntawm lub tshuab puag thiab cov tub ntxhais hlau, thiab lwm yam, qhov sib txawv ntawm huab cua yuav tshwm sim ntawm ob qhov chaw mating artificially, uas tsis yog. conducive rau lub cev muaj zog.Thermal rwb thaiv tsev rau tshav kub dissipation.Kev siv cov xim dipping nrog ib lub thav duab tsis tsuas yog ua rau huab cua sib txawv ntawm qhov chaw sib txuas, tab sis kuj zam cov yam tseem ceeb uas yuav ua rau lub cev muaj zog winding thaum lub sij hawm tsim khoom vim yog kev tiv thaiv ntawm lub casing.Kev tswj nqa nqa tau muaj qee yam kev txhim kho.

Thaum tshav kub kub conduction yog hu ua thermal conduction.Cov txheej txheem hloov hluav taws xob ntawm ob yam khoom sib cuag nrog ib leeg thiab nrog qhov sib txawv ntawm qhov kub thiab txias, lossis nruab nrab ntawm qhov sib txawv ntawm qhov sib txawv ntawm tib yam khoom yam tsis muaj qhov sib txawv macroscopic displacement, hu ua thermal conduction.Cov khoom ntawm ib yam khoom los ua kom sov yog hu ua thermal conductivity ntawm ib yam khoom.Thaum tshav kub kub hloov mus rau hauv cov khoom ntom ntom thiab cov kua dej tseem yog cov thermal conduction nkaus xwb.Lub thermally conductive ib feem yog koom nrog hauv cov cua kub hloov hauv cov kua txav.

Thermal conduction cia siab rau thermal motion ntawm electrons, atoms, molecules thiab lattices nyob rau hauv cov ntaub ntawv los hloov tshav kub.Txawm li cas los xij, cov khoom ntawm cov khoom sib txawv, lub ntsiab thermal conduction mechanisms txawv, thiab cov teebmeem kuj txawv.Feem ntau hais lus, cov thermal conductivity ntawm cov hlau yog ntau dua li cov hlau tsis muaj hlau, thiab cov thermal conductivity ntawm cov hlau ntshiab yog ntau dua li cov hlau.Ntawm peb lub xeev ntawm cov teeb meem, thermal conductivity ntawm cov khoom hauv lub xeev yog qhov loj tshaj plaws, ua raws li cov kua hauv lub xeev thiab qhov tsawg tshaj plaws hauv lub xeev gaseous.

Thermal rwb thaiv tsev los yog thermal rwb thaiv tsev cov ntaub ntawv feem ntau yog siv nyob rau hauv kev tsim kho, thermal zog, cryogenic technology.Feem ntau ntawm lawv yog cov ntaub ntawv ntxeem tau, thiab huab cua nrog cov thermal conductivity tsis zoo yog khaws cia rau hauv lub qhov hws, yog li lawv tuaj yeem ua lub luag haujlwm ntawm kev rwb thaiv tsev kub thiab kev txuag hluav taws xob.Thiab lawv yog tag nrho cov discontinuities, thiab lub tshav kub hloov lwm lub tsev muaj ob lub tshav kub conduction ntawm lub cev pob txha thiab cov huab cua, nrog rau cov cua convection thiab txawm lub hluav taws xob.Hauv engineering, thermal conductivity hloov los ntawm qhov sib xyaw ua ke ntawm cov hluav taws xob hloov hluav taws xob yog hu ua pom meej thermal conductivity.Pom tseeb thermal conductivity tsis tsuas yog cuam tshuam los ntawm cov khoom muaj pes tsawg leeg, siab thiab kub, tab sis kuj los ntawm cov khoom ntom ntom thiab noo noo cov ntsiab lus.Qhov qis dua qhov ntom, qhov voids me me hauv cov khoom thiab qhov qis dua qhov pom tseeb thermal conductivity.Txawm li cas los xij, thaum qhov ntom ntom me me rau qee qhov, nws txhais tau hais tias cov voids sab hauv tau nce los yog tau txuas nrog rau ib leeg, ua rau cov huab cua sab hauv convection, hloov hluav taws xob, thiab pom meej thermal conductivity nce.Ntawm qhov tod tes, cov pores nyob rau hauv cov khoom siv thermal rwb thaiv tsev yog ib qho yooj yim rau nqus dej, thiab cov evaporation thiab tsiv teb tsaws ntawm cov dej nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias gradient zoo heev ua kom pom tseeb thermal conductivity.