2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Emissivity nyob ntawm cov khoom siv thiab qhov zoo ntawm qhov chawTxhua yam khoom ntawm qhov kub siab tshaj qhov xoom xoom emit thermal tawg. Txawm li cas los xij, rau ib qho tshwj xeeb wavelength thiab qhov kub thiab txias, tus nqi hluav taws xob hluav taws xob tso tawm nyob ntawm qhov emissivity ntawm cov khoom nto.
hluav taws xob yog dab tsi thiab qhov emissivity tus nqi cuam tshuam li cas?
Qhov emissivity ntawm qhov chaw ntawm cov khoom yog nws cov txiaj ntsig hauv emitting zog raws li thermal tawg. … Quantitatively, emissivity yog qhov piv ntawm cov hluav taws xob thermal los ntawm ib qho chaw rau cov hluav taws xob los ntawm qhov zoo tshaj plaws dub ntontawm qhov kub thiab txias raws li tau muab los ntawm Stefan–Boltzmann txoj cai.
Cov emissivity cuam tshuam li cas rau kev hloov hluav taws xob los ntawm hluav taws xob?
Cia peb xav tias nws qhov emissivity yog 0.1. Peb tau ntsuas nws qhov ntsuas kub tsis tu ncua ntawm 150 F. … Peb tseem yuav tsum tau tshem tawm ntawm 66 Btu / hr raug tsim los ntawm lub cev muaj zog, tab sis yog tias peb xav tias qhov emissivity tshiab ntawm 0.9, ces qhov loj heev ntawm cov hluav taws xob poob yuav txo qhov kub ntawm qhov chaw rau 118 F raws li qhia.
Yuav ua li cas thaum emissivity nce?
Yog, Emissivity hloov nrog temperature vim lub zog uas khi rau hauv tus cwj pwm ntawm cov molecules uas tsim rau saum npoo. … Raws li cov khoom tau mus rau qhov kub siab dua, cov molecules txav ntau dua, qhov no txhais tau tias lawv feem ntau yuav tawm ntau zog.
Dab tsi hloov qhovemissivity sawv cev?
Cov emissivity ntawm hlau thiab iav kuj hloov ua haujlwm kub. … Qhov no txhais tau hais tias lub pyrometer yuav ntsuas ntawm qhov tob hauv qab lub iav saum npoo, kuaj xyuas lub zog thermal los ntawm qhov khoom.
Pom zoo:
Dab tsi yog qhov txawv ntawm lub tshuab hluav taws xob thiab lub tshuab hluav taws xob?
Gramophone: Txhua lub suab kaw suab, lossis cov cuab yeej ua si yav dhau los-cov suab kaw, tshwj xeeb tshaj yog tias nws siv lub tiaj tiaj tiaj. Phonograph: Txhua lub suab kaw suab, lossis cov cuab yeej siv rau kev ua si cov suab uas tau kaw dhau los, tshwj xeeb tshaj yog tias nws siv lub tog raj kheej tig.
Lub tshuab hluav taws xob loj npaum li cas rau qhov chaw nres tsheb tsis muaj hluav taws xob?
Nrhiav lub rhaub nrog BTU tso zis uas phim koj cov txiaj ntsig. Piv txwv li, yog tias koj qhov chaw nres tsheb tsis muaj hluav taws xob yog 484 square feet, koj cov qauv yog 484 / 200 x 9, 000, lossis 21, 780. Koj xav tau lub rhaub nrog tsawg kawg yog 21, 780 BTU tso zis.
Puas hluav taws xob hluav taws xob puas tsim hluav taws xob?
Coal feem ntau siv roj los tsim hluav taws xobhauv Tebchaws Meskas. Hauv cov chaw tsim hluav taws xob hluav taws xob hluav taws xob, cov hluav taws xob bituminous, subbituminous thee, lossis lignite raug hlawv. Cov cua kub uas tsim los ntawm kev sib xyaw ntawm cov thee yog siv los hloov cov dej mus rau hauv qhov chaw siab zog, uas tsav lub turbine, uas tsim hluav taws xob.
Rau lub xov tooj hluav taws xob hluav taws xob coj tus cwj pwm li electrolytic cell?
Lo lus teb yog qhov kev xaiv (iii) Lub xov tooj hluav taws xob hluav taws xob tuaj yeem coj tus cwj pwm zoo li lub xov tooj hluav taws xob thaum muaj ib qho kev thov ntawm ib qho kev cuam tshuam sab nraud ntawm lub galvanic cell thiab cov tshuaj tiv thaiv tsis yog inhibited kom txog thaum qhov tawm tsam qhov hluav taws xob nce mus txog tus nqi 1.
Lub tshuab hluav taws xob hluav taws xob tsim hluav taws xob li cas?
Piav seb lub twj hluav taws xob hluav taws xob tsim hluav taws xob hla lub membrane li cas. Los ntawm pum electrons hla lub membrane, sab uas cov electrons raug tshem tawm muaj qhov zoo dua, thaum sab tau txais cov hluav taws xob ntau muaj qhov tsis zoo.
