Thermal hluav taws xob
Cov hluav taws xob hluav taws xob yog hais txog kev hloov hluav taws xob los ntawm kev nqus thiab emission ntawm electromagnetic nthwv dej, tsis tas siv cov khoom nruab nrab. Qhov loj ntawm hluav taws xob hloov hluav taws xob muaj qhov muaj zog heev nyob ntawm qhov emissivity thiab kub ntawm cov khoom nto. Feem ntau, cov ntaub ntawv uas tsis yog xim hlau thiab cov ntaub ntawv tsis yog pob tshab pom muaj qhov emissivity siab uas feem ntau tshaj 0.80. Cov emissivity ntawm cov hlau tuaj yeem sib txawv ntawm 0.02 (xws li txhuas ntawv ci) thiab 0.90 (xws li anodized aluminium) nyob ntawm qhov kev teeb tsa geometrical thiab kho qhov chaw ntawm cov hlau nto. Lub polished, ci ntsa iab hlau nto radiate heev me ntsis tshav kub. Ib tug pleev xim los yog anodized nto radiates ho kub ntau tshaj li ib tug kaj, unpainted ib tug. Tus nqi hluav taws xob electromagnetic ntawm cov khoom yog proportional rau nws tus nqi ntawm kev nqus. Yog li ntawd, cov xim dub uas nqus cov hluav taws xob ntau dua li cov xim sib dua xws li cov xim dawb lossis xim hlau yog qhov ua tau zoo dua hauv kev hloov hluav taws xob thermal. Lub zog thermal xa mus los ntawm hluav taws xob nce siab thaum qhov kub nce. Txawm li cas los xij, radiative tshav kub dissipation ntawm qhov kub thiab txias (0 - 100 degree) feem ntau tsis pom zoo li piv rau kev hloov hluav taws xob los ntawm convection.
