Yuav ua li cas 1.0 millimeter 316 stainless hlau sheath piv rau 2.0 millimeter sheath nyob rau hauv tiv thaiv kom qhuav-Kub puas thaum muaj xwm txheej poob ntawm cov kua nyob rau hauv Vertical Immersion rhaub?

Kev poob qis ntawm cov kua ua kua-qhuav-hluav taws yog ib qho ntawm feem ntau tshwm sim thiab kev puas tsuaj tsis zoo ua rau cov cua sov ntsug tso rau hauv cov tso tsheb hlau luam, cov twj tso kua mis thiab cov txheej txheem rau cov nroj tsuag kev nyab xeeb engineers thiab cov cuab yeej tshwj xeeb. Thaum cov kua theem poob qis dua qhov chaw sov ntawm lub plhaub, cov cua sov xa mus rau cov kua tam sim no dissipated nyob rau hauv lub sheath thiab kuj hlau. Kev kub ceev ceev ua rau oxidation ntawm cov hlau, degradation ntawm MgO rwb thaiv tsev thiab thaum kawg rupture ntawm sheath los yog hluav taws xob tsis ua hauj lwm. Phab ntsa thickness ntawm 316 stainless hlau sheath yog ib qho tseem ceeb parameter nyob rau hauv lub sij hawm rau kev puas tsuaj thiab kub siab tshaj plaws nyob rau hauv ib tug qhuav- hlawv tshwm sim. Kab lus no nthuav tawm qhov kev sib piv ntau ntawm qhuav- hlawv kev ua tau zoo rau 1.0 hli thiab 2.0 hli phab ntsa sheaths nyob rau hauv sib npaug zog thiab raug teeb tsa rau kev pheej hmoo txo ​​cov lus pom zoo hauv cov ntawv thov tseem ceeb.

Thermal teb rau qhuav-Hlawv mob raws li ib tug muaj nuj nqi ntawm phab ntsa Thickness
Yog tias lub tshuab nqus dej ntsug ntsug de-immersed nrog cov kua, qhov kub hloov pauv coefficient ntawm lub plhaub saum npoo yuav poob li ntawm 5,000-10,000 W/m2-K hauv dej kub lossis 500{33}}1,000 W/m2-K hauv 5-K txog 000 W / 0. huab cua. Qhov kev txo qis 100-fold no yuav tsum muaj qhov kub ntawm qhov kub thiab txias kom ua rau muaj qhov sib txawv ntawm cov cua sov tib yam . 10 W/cm2 (100,000 W/m2) rhaub nyob rau hauv cov huab cua nrog ntuj convection coefficient ntawm 50 W / m2-K, khov kho lub xeev qhov kub thiab txias yuav yog 100,000/{0{0{0201}℃ntawm melting point saum toj no, 316 stainless hlau. Nyob rau hauv kev muaj tiag lub rhaub yeej tsis ncav cuag equilibrium. Hloov chaw nws ua kom sov kom txog thaum cov hlau tsis kam tawg los yog thermal cutoff kicks hauv . Lub thermal loj ntawm lub sheath thiab sab hauv qhov chaw tswj tus nqi ntawm kub nce nyob rau hauv qhuav-kub. Lub 1.0 hli phab ntsa sheath muaj ze li ntawm ib nrab ntawm thermal huab cua ib chav tsev ntawm 2.0 hli sheath. Yog li ntawd, nws qhov kub thiab txias nce txog ob zaug sai dua hauv thawj vib nas this ntawm qhuav-hlawv. Kev sim cov ntaub ntawv rau 10 hli OD sheaths ntawm 10 W / cm2 nyob rau hauv tseem huab cua qhia tau hais tias ib tug 1.0 hli phab ntsa ua tiav 400℃ntawm sab nrauv nto nyob rau hauv 8 vib nas this, whereas 2.0 hli phab ntsa yuav tsum tau 16 vib nas this mus txog 400 degree. Lub 2.0 hli sheath, txawm li cas los xij, tuav cov cua sov ntau dua thiab yog li nyob twj ywm siab tshaj qhov kub thiab txias ntev dua thaum lub zog raug tshem tawm.

Qhov siab tshaj plaws kub thiab lub sij hawm ua tsis tiav kev sib piv
Qhov tseem ceeb tsis ua hauj lwm kub ntawm 316 encased rhaub yog tswj hwm los ntawm oxidation txwv ntawm cov npib tsib xee sab hauv -chromium kuj hlau, kwv yees li 800-850℃rau kev ua haujlwm tas mus li. Ua tsaug rau MgO rwb thaiv tsev txheej, qhov kub ntawm cov hlau thaum lub sij hawm qhuav - hlawv yog nyob ib ncig ntawm 50-100℃siab tshaj qhov kub ntawm lub puab nto ntawm lub sheath. Cov hlau kub hits 800℃thiab ceev oxidation pib ntawm 700℃ntawm sab hauv sheath nto. Lub sijhawm ua tiav qhov pib no yog qhov ua haujlwm ntawm phab ntsa tuab. Rau ib phab ntsa 1.0 hli, sab hauv ntawm lub plhaub tau nce mus txog 700 o C tom qab li 25 vib nas this ntawm 10 W / cm 2 hauv huab cua. Tag nrho lub sij hawm qhib Circuit Court tsis ua hauj lwm ntawm cov hlau yog li 35-45 vib nas this. Raws li cov xwm txheej zoo ib yam, tab sis nrog cov phab ntsa tuab ntawm 2.0 hli, sab hauv sheath nto mus txog 700℃tom qab nyob ib ncig ntawm 55 sec thiab hlau tsis ua hauj lwm tshwm sim ntawm 75 thiab 90 sec. Lub sij hawm qhuav-hlwb ciaj sia yog 2 mus rau 2.5 npaug ntev dua nrog cov npog tuab. Qhov kev sib txawv no yog qhov tseem ceeb heev rau cov ntawv thov uas cov lus teb ntawm kev txiav tawm thermal lossis qib hloov yuav siv sijhawm ob peb feeb. Lub 1.0 hli sheath tej zaum yuav ua tsis tau ua ntej ib tug qeeb teb mechanical thermostat yuav qhib, qhov twg 2.0 hli sheath muaj txaus thermal inertia los txuas lub sij hawm cov tshuaj tiv thaiv.

Kev sib piv ntawm qhuav-Hlawv Ciaj sia nyob Matrix
Cov lus hauv qab no muab qhov sib piv ncaj qha ntawm 1.0 mm thiab 2.0 mm 316 sheath kev ua tau zoo rau qhuav- hlawv tshwm sim ntawm ntau qhov chaw ua haujlwm. Qhov tseem ceeb imply ntsug immersion rhaub nyob rau hauv tseem huab cua tom qab poob kua, thiab tsis muaj active txias los yog yuam convection.

Watt density Dry-Hlawv Kev Ua HaujlwmSheath Phab Ntsa Thickness Lub Sijhawm rau Sab Nraud ntawm 400℃Lub Sijhawm rau Sab Hauv Qhov Ncauj ntawm 700℃Tag Nrho Lub Sijhawm rau Hlau Tsis Pom Zoo Pom Zoo Kev Tiv Thaiv
5 W/cm2 1.0 mm 12 vib nas this 40 vib nas this 55 – 70 vib nas this Fast acting thermal cut off ( < 30 seconds )
5 W/cm² 2.0 mm 24 vib nas this 85 vib nas this 110 - 140 vib nas this Standard thermal cutoff txais 10 W/cm² 1.0 mm 8 vib nas this 25 vib nas this 35 - 45 vib nas this Electronic theem hloov 5 thib ob teb tsim nyog
10 W/cm2 2.0 mm 16 sec. 55 sec. 75 – 90 sec. Txheem thermal txiav tawm lossis qib hloov tau txais 15 W / cm 2 1.0 mm 5 sec{10}} sec. 22 - 30 sec. Yuav tsum muaj kev tiv thaiv rov qab; siab txaus 15 W/cm2 2.0 mm 11 sec{17}} sec. 50 – 65 sec. Fastacting thermal cutoff pom zoo 20 W/cm2 1.0 mm 4 sec. 12 sec. 17 – 22 sec.Tsis qhia, ib qho kev tiv thaiv yuav qeeb dhau
20 W / cm² 2.0 mm 8 sec 28 sec 40 - 50 sec2 thib ob cov tshuaj tiv thaiv hluav taws xob tiv thaiv xav tau
Rau cov ntawv thov nrog watt densities ntau dua 15 W / cm 2 thiab rau cov phab ntsa nyias tsawg dua 1.2 hli, qhov qhuav -lub sij hawm ci ntsa iab yog luv heev uas tsuas yog kev tiv thaiv hluav taws xob nrog sub- cov lus teb thib ob tuaj yeem tiv thaiv kev puas tsuaj, xws li cov thermocouple implanted hauv sheath txuas mus rau ib qho khoom ruaj khov -state relay. Mechanical thermostats thiab thermal fuses muaj lub sijhawm teb ntawm 5-15 vib nas this uas zoo sab nraum lub qhov rais ntawm kev ciaj sia.

Tsim Cov Kev Hloov Kho Kom Qhuav -Kub Tolerance
Peb tus qauv hloov pauv tuaj yeem ua rau lub sijhawm muaj sia nyob qhov twg cov lus teb thermal yuav tsum muaj cov phab ntsa nyias nyias 316 sheath, tseem muaj kev pheej hmoo ntawm kev kub hnyiab. Qhov zoo tshaj plaws thiab yooj yim tshaj plaws yog ntxiv ib qho kev txiav tawm qis qis uas yuav hloov hluav taws xob thaum cov kua dej poob qis hauv qab qhov cua sov. Ib qho kev sojntsuam conductivity lossis ntab hloov, nyob ntawm cov kua dej tsawg kawg nkaus, muab kev tiv thaiv ua ntej lub tshuab cua sov. Qhov kev hloov thib ob yog kom txo qis watt ceev nyob rau sab sauv ntawm lub rhaub. Tus qauv tapering watt ntom ntom - tsawg zog rau ib chav tsev ntev nyob rau sab saum toj uas raug feem ntau yog - txhim kho qhuav- hlawv lub sij hawm ciaj sia yam tsis muaj kev txi tag nrho lub tshuab cua sov. Qhov kawg kev hloov pauv yog tso lub thermocouple ncaj qha rau sab hauv ntawm 316 sheath. Qhov ntsuas ntsuas no tuaj yeem kuaj pom qhov kub nce sai ntawm qhov qhuav-kub hauv 1-2 vib nas this, yog li lub kaw lus tswj tau tuaj yeem hloov hluav taws xob ua ntej xaim mus txog qhov kub thiab txias. Qhov no yog txoj hauv kev uas cov cua sov muaj kev ntseeg siab hauv cov haujlwm tseem ceeb raug siv. Rau feem ntau cov ntawv thov kev lag luam 2.0 hli phab ntsa sheath yuav muab qhov yooj yim thiab ruaj khov tiv thaiv kom qhuav{18}} hlawv. Lub sijhawm muaj sia nyob ntxiv ua rau cov txheej txheem tiv thaiv tsis tu ncua ua haujlwm tsis tu ncua thiab cov phab ntsa tuab kom muaj sia nyob ib ntus luv luv - hlawv qhov xwm txheej yam tsis muaj kev puas tsuaj mus tas li. Cov kws ua haujlwm yuav tsum tau txiav txim siab kom muaj kev nyab xeeb ntawm phab ntsa los ntawm cov chaw tsim khoom thiab yuav tsum piav qhia txog qhov qhuav -lub sijhawm tiv thaiv hluav taws kub uas xav tau. Yog tias tus neeg muag khoom tsis tuaj yeem muab qhov kev tshawb fawb no, lawv yuav tsis nkag siab tag nrho cov thermal dynamics ntawm qhuav{27}} xwm txheej kub. Tus nqi ntawm kev nce phab ntsa thickness ntawm 1.0 hli mus rau 2.0 hli yog me me piv rau cov nqi ntawm lub rhaub tsis ua hauj lwm ua rau kev kaw ntawm kev tsim khoom lossis hluav taws kub nyhiab vim cov ntaub ntawv overheating. Yog tias koj tsis paub meej, mus rau phab ntsa tuab thiab them tus nqi me me hauv kev ua kom sov rau qhov hnyav ntawm qhov qhuav-kub.