Cryogenic dewars yog ib hom ntim khoom siv los khaws cov kua cryogenic ntawm qhov kub thiab txias. Cov kua dej no feem ntau yog siv rau hauv ntau yam kev tshawb fawb thiab kev lag luam, xws li cryogenics, superconductivity, thiab lub zog cia. Yog li ntawd, cryogenic dewars yog qhov tseem ceeb rau khaws cia cov kua dej no kom zoo thiab nyab xeeb.
Lub luag haujlwm tseem ceeb ntawm cryogenic dewar yog tswj qhov kub ntawm cov kua cryogenic hauv nws. Qhov no yog ua tiav los ntawm kev siv lub tshuab nqus tsev rwb thaiv tsev, uas txo cov cua sov hloov ntawm qhov chaw sab nraud. Lub tshuab nqus tsev rwb thaiv tsev kuj tseem pab tiv thaiv cov kua cryogenic los ntawm sab nraud thermal shocks thiab kev hloov siab.
Cryogenic dewars feem ntau yog ua los ntawm cov hlau tsis muaj steel lossis txhuas, vim tias cov ntaub ntawv no muaj cov thermal conductivity zoo thiab tuaj yeem tiv taus qhov kub thiab txias uas yuav tsum tau muaj rau cov kua cryogenic. Cov thawv ntim kuj tseem muaj ob-walled los muab cov rwb thaiv tsev ntxiv thiab tiv thaiv kom tsis txhob muaj cua sov. Sab hauv phab ntsa ntawm dewar feem ntau yog ua los ntawm cov khoom siv uas tuaj yeem tiv taus qhov kub thiab txias, xws li stainless hlau lossis txhuas, thaum lub phab ntsa sab nrauv feem ntau yog ua los ntawm cov khoom siv muaj zog, xws li carbon steel lossis stainless hlau.
Cryogenic dewars tuaj nyob rau hauv ntau yam duab thiab qhov ntau thiab tsawg, nyob ntawm seb cov ntawv thov tshwj xeeb thiab tus nqi ntawm cov kua cryogenic xav tau. Qee qhov dewars me me kom haum rau hauv chav kuaj lub freezer, thaum lwm tus loj txaus los khaws ntau txhiab litres ntawm cov kua cryogenic.
Txhawm rau kom muaj kev nyab xeeb thiab ua haujlwm tau zoo ntawm cov kua cryogenic, cryogenic dewars tau nruab nrog ntau yam kev nyab xeeb. Cov yam ntxwv no suav nrog cov cuab yeej siv siab los tiv thaiv overpressure hauv lub thawv, thermal sensors los saib xyuas qhov kub thiab txias hauv dewar, thiab lub tshuab nqus tsev vacuum-breaker li qub los tswj lub tshuab nqus tsev rwb thaiv tsev. Qee qhov dewars kuj muaj cov kab ke hauv nruab nrab kom ntes tau cov dej ntws los yog nchuav.
Hauv kev xaus, cryogenic dewars yog qhov tseem ceeb rau khaws cia cov kua cryogenic ntawm qhov kub thiab txias. Cov thawv no muab cov rwb thaiv tsev zoo thiab tiv thaiv cov kua dej los ntawm cov thermal shocks sab nraud thiab kev hloov siab. Nrog lawv cov yam ntxwv kev nyab xeeb thiab kev tsim kho ob phab ntsa, cryogenic dewars ua kom muaj kev nyab xeeb thiab ua haujlwm tau zoo ntawm cov kua dej tseem ceeb hauv ntau yam kev tshawb fawb thiab kev lag luam.
