2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Emissivity yog khoom siv kho qhov muag ntawm cov khoom siv, uas piav qhia ntau npaum li cas lub teeb yog radiated (emitted) los ntawm cov khoom uas cuam tshuam rau tus nqi uas radiates lub cev dub ntawm tib qhov kub. Lub cev dub yog lub cev zoo tagnrho uas nqus tag nrho cov hluav taws xob. … Lub cev dub yog lub cev zoo tshaj plaws uas nqus tau tag nrho cov hluav taws xob.
Dab tsi yog emissivity ntawm cov khoom?
Emissivity txhais tau tias yog qhov piv ntawm lub zog hluav taws xob los ntawm cov khoom siv saum npoo mus rau qhov hluav taws xob los ntawm cov emitter zoo meej, lub npe hu ua lub cev dub, ntawm tib qhov kub thiab qhov nthwv dej thiab hauv qab. tib yam kev pom. Nws yog ib tug dimensionless tooj ntawm 0 (rau ib tug zoo meej reflector) thiab 1 (rau ib tug zoo meej emitter).
Koj pom qhov emissivity ntawm cov khoom li cas?
Qhov emissivity tuaj yeem txiav txim siab los ntawm ib qho ntawm cov hauv qab no, raws li kev nyiam: Txiav txim siab qhov ntsuas kub ntawm cov khoom sivib lub sensor xws li RTD, thermocouple lossis lwm yam txoj kev tsim nyog. Tom ntej no, ntsuas cov khoom kub thiab kho qhov chaw emissivity kom txog thaum tus nqi raug.
Qhov txawv ntawm emissivity thiab absorptivity yog dab tsi?
Absorptivity (α) yog ib qho kev ntsuas ntawm ntau npaum li cas ntawm cov hluav taws xob absorbed los ntawm lub cev. Reflectivity (ρ) yog ib qho kev ntsuas ntawm ntau npaum li cas yog reflected, thiab transmissivity (τ) yog ib qho kev ntsuas ntawm ntau npaum li cas kis los ntawm cov khoom. … Emissivity (ε) yog ib qho kev ntsuas ntawm yuav ua li cas much thermalhluav taws xob lub cev tawm mus rau nws ib puag ncig.
YPuas yog lub nqus hluav taws xob zoo ntawm cov hluav taws xob zoo?
Ib yam khoom uas zoo ntawm nqus hluav taws xob kuj yog ib qho zoo emitter, yog li lub cev dub zoo meej yuav yog qhov zoo tshaj plaws ntawm hluav taws xob hluav taws xob. Tsis muaj cov khoom paub uas zoo tshaj plaws ntawm absorbing lossis emitting tag nrho cov hluav taws xob ntawm txhua zaus uas yuav raug coj mus rau nws.
Pom zoo:
Dab tsi yog qhov khoom vaj khoom tsev zoo hloov pauv?
Nyob rau hauv cov khw muag khoom, cov khoom vaj khoom tsev hloov pauv ntawm 2.5 lossis ntau duatuaj yeem suav tias yog qhov zoo, thaum lub tuam txhab hauv cov khoom siv hluav taws xob feem ntau yuav tsom rau cov khoom muaj nqis hloov pauv. uas yog nruab nrab ntawm 0.
Daim ntawv cog lus khoom vaj khoom tsev yog dab tsi?
Ntawm daim ntawv cog lus vaj tse txhais tau tias koj cog lus tus nqi ntawm cov khoom ntiag tug rau lub tsev hais plaub kom lav tias tus neeg raug foob yuav tshwm sim hauv tsev hais plaub. Yog hais tias tus neeg raug foob tsis tuaj rau hauv tsev hais plaub thaum s/nws yuav tsum tau, lub tsev hais plaub yuav nqa cov khoom uas tau muab tso tseg raws li nws yog nyiaj ntsuab.
Cov laj kab puas ua rau ntawm cov khoom vaj khoom tsev?
Virginia muaj cov cai dav davhais txog thaj tsam thaj tsam, tseem hu ua kev faib lossis faib laj kab, uas muaj nyob hauv kab vaj tse. Virginia txoj cai lij choj qhia txog cov tswv cuab lub luag haujlwm los tsim, tswj, thiab them rau cov laj kab ciam teb.
Puas yog tsis yog khoom vaj khoom tsev tam sim no?
Cov khoom tsis muaj nqis yog ib lub tuam txhab kev nqis peev mus sij hawm ntev uas yog tsis yooj yim hloov mus rau nyiaj ntsuab lossis tsis xav tias yuav dhau los ua nyiaj ntsuab hauv ib xyoo nyiaj txiag. … Piv txwv ntawm cov cuab tam uas tsis yog tam sim no suav nrog kev nqis peev, cov cuab yeej txawj ntse, vaj tse, thiab khoom siv.
Cov khoom siv puas yog khoom vaj khoom tsev?
khoom yog a khoom vaj khoom tsev ruaj khov, lossis khoom tsis yog tam sim no. Qhov no txhais tau tias nws yuav tsis raug muag hauv lub xyoo tom ntej accounting thiab tsis tuaj yeem ua kua tau yooj yim. Txawm hais tias nws yog qhov zoo kom muaj cov khoom muaj nqis tam sim no uas muab koj lub lag luam npaj nkag mus rau cov nyiaj ntsuab, tau txais cov cuab tam mus sij hawm ntev kuj yog qhov zoo.
