Yuav siv cov ntsuas kub infrared li cas hauv kev kub dov?
1. Cov hauv paus ntsiab lus
Txhua yam khoom uas muaj qhov kub siab tshaj ** xoom yog tas li emitting infrared hluav taws xob hluav taws xob lub zog mus rau qhov chaw nyob ib puag ncig. Infrared radiation yam ntxwv ntawm ib yam khoom: Qhov loj ntawm lub zog hluav taws xob thiab nws qhov kev faib tawm los ntawm wavelength yog ze ze rau nws qhov kub thiab txias. Yog li, los ntawm kev ntsuas lub zog infrared radiated los ntawm cov khoom nws tus kheej, nws qhov kub thiab txias tuaj yeem ntsuas qhov tseeb. Qhov no yog lub hom phiaj ntawm lub hauv paus ntawm qhov ntsuas kub ntawm infrared radiation.
Infrared tus pas ntsuas kub, tseem hu ua infrared radiation kub ntsuas, yog ib lub tshuab siv infrared hluav taws xob tawm los ntawm cov khoom nws tus kheej los ntsuas qhov kub ntawm ib yam khoom. Infrared radiation, lossis infrared rays, yog hluav taws xob electromagnetic nrog lub wavelength ntawm 0.76 μm thiab 1000 μm. Rau lub cev dub zoo tagnrho, tag nrho cov hluav taws xob hluav taws xob ntawm tag nrho cov wavelengths emissions mus rau qhov chaw hemispheric ib chav nyob saum npoo av (xws li tag nrho cov hluav taws xob lossis hluav taws xob siv hluav taws xob) yog 4 npaug ntawm qhov kub ntawm qhov khoom. Proportional rau lub zog ntawm:
Mb(T)=σT4(1)
Nov yog txoj cai Stefan-Boltzmann. Ntawm lawv, σ=5.6697 ×10-8W/m2K4 yog hu ua Stephen-Boltzmann tas li.
Kev sib npaug (1) yog siv rau cov khoom siv tiag tiag thiab yuav tsum tau muab sib npaug los ntawm cov hluav taws xob hluav taws xob:
Mgb(T) =εσT4
Nws tuaj yeem pom tau tias qhov kev siv hluav taws xob tsis sib xws Mgb (T) ntawm txhua yam khoom muaj feem xyuam rau qhov kub ntawm qhov khoom thiab qhov emissivity ntawm cov khoom. Lub emissivity ε ntawm ib yam khoom yog ncaj qha ntsig txog cov khoom ntawm nws cov khoom (muaj pes tsawg leeg, hlau thiab tsis yog hlau, siv lead ua thiab amorphous, thiab lwm yam), lub xeev nto (surface smoothness thiab roughness, degree ntawm oxidation, muaj kuab paug los yog nto txheej, thiab lwm yam. .) thiab qhov kub ntawm qhov khoom. Ntev npaum li qhov emissivity ntawm cov khoom raug xaiv kom raug, qhov ntsuas kub ntawm cov khoom ntsuas tau raug raug.
Infrared tus pas ntsuas kub yog tsim los ntawm peb qhov chaw: kho qhov muag system, kuaj pom thiab ua cov teeb liab. Lub luag haujlwm tseem ceeb ntawm lub tshuab kho qhov muag yog txhawm rau sau cov hluav taws xob hluav taws xob ntawm lub hom phiaj ntsuas thiab tsom nws ntawm lub ntsuas hluav taws xob infrared. Lub luag haujlwm ntawm lub ntsuas hluav taws xob infrared yog los hloov cov hluav taws xob tau txais infrared rau hauv hluav taws xob teeb liab tso zis.
