Wuxi Slossen lub hauv paus ntsiab lus tsom xam ntawm emissivity ntawm infrared ntsuas kub
Emissivity yog qhov piv ntawm lub zog hluav taws xob ntawm ib qho khoom tiag tiag rau lub cev dub ntawm tib qhov kub thiab txias hauv tib lub sijhawm. Cov xwm txheej zoo ib yam hais txog tib lub geometric tej yam kev mob (emitting hluav taws xob cheeb tsam, lub kaum sab xis loj thiab kev taw qhia rau kev ntsuas hluav taws xob hluav taws xob) thiab spectral tej yam kev mob (spectral ntau yam rau ntsuas hluav taws xob flux). Txij li thaum emissivity muaj feem xyuam rau kev ntsuas, muaj ntau lub ntsiab lus ntawm emissivity.
Hemispheric emissivity Hemispheric emissivity yog qhov piv ntawm radiant zog flux (kua hluav taws xob tawm-degree) tawm los ntawm lub tshuab hluav taws xob mus rau qhov chaw hemispheric hauv ib cheeb tsam thiab cov hluav taws xob tawm-degree ntawm lub cev dub ntawm tib qhov kub, uas tau muab faib ua ob hom. : tag nrho cov nyiaj thiab spectral tus nqi.
ib txwm emissivity
Ib txwm emissivity yog cov emissivity ntsuas nyob rau hauv ib tug me me lub kaum sab xis nyob rau hauv ib txwm kev taw qhia ntawm lub radiating nto. Nws yog qhov piv ntawm qhov ci ntsa iab nyob rau hauv qhov kev coj mus rau qhov ci ntsa iab ntawm lub cev dub ntawm tib qhov kub. Txij li cov tshuab infrared ntes hluav taws xob hluav taws xob nyob rau hauv lub kaum sab xis me me nyob rau hauv qhov kev taw qhia ntawm lub hom phiaj nto, qhov ib txwm emissivity tseem ceeb heev.
Rau lub cev dub, tag nrho cov emissivities sib npaug li 1, thaum rau cov khoom tiag, qhov tseem ceeb ntawm ntau yam emissivities tsawg dua 1. Qhov emissivity peb tham txog tam sim no yog qhov nruab nrab emissivity.
Hais txog emissivity kho:
Qhov emissivity ntawm cov khoom sib txawv ntawm qhov sib txawv. Txhawm rau kom ntseeg tau qhov tseeb ntawm qhov ntsuas kub, kev kho emissivity feem ntau yuav tsum tau ua. Txij li thaum tus pas ntsuas kub ntsuas nrog lub cev dub, qhov emissivity saum npoo ntawm txhua yam khoom me dua li lub cev dub emissivity.
Txoj kev kho emissivity ntawm tus pas ntsuas kub infrared yog los kho qhov ua kom muaj zog ntawm lub tshuab hluav taws xob raws li qhov emissivity ntawm cov khoom sib txawv, kom cov hluav taws xob ntawm cov khoom tiag tiag nrog rau qhov kub thiab txias ua rau lub teeb liab hauv qhov system uas zoo ib yam li cov khoom tsim. los ntawm ib lub cev dub nrog qhov kub thiab txias. Cov teeb liab yog tib yam. Piv txwv li, yog tias qhov emissivity ntawm ib yam khoom yog {{0}}.8, ces qhov loj ntawm lub amplifier yuav tsum tau nce mus rau 1/0.8=1.25 zaug. Txawm li cas los xij, nyob rau hauv cov chaw lag luam, nws feem ntau nyuaj rau kev txiav txim siab lub hom phiaj emissivity tsis vim yog cov khoom sib txawv, cov duab thiab qhov chaw ntawm lub hom phiaj ntsuas. Kuj tseem muaj kev ntsuas qhov yuam kev tshwm sim los ntawm lwm yam uas yuav ua rau qhov sib txawv ntawm qhov ntsuas tus nqi thiab tus nqi tseeb. Kev taw qhia ntawm emissivity parameter hloov kho tuaj yeem daws qhov teeb meem no zoo yam tsis muaj kev cuam tshuam rau kev ntsuas linearity. Koj tuaj yeem kho nws raws li kev paub kub lossis txheej txheem kub raws li cov kauj ruam hauv qab no:
Piv txwv li: qhov ntsuas qhov ntsuas qhov ntsuas kub yog: 500-1400 degree
Qhov ntsuas kub tiag tiag yog 1200 degree, ntsuas kub yog 1150 degree,
Lub sijhawm no, emissivity parameter tuaj yeem hloov kho rau:
(1150-500)÷(1200-500)=0.928≈0.93
