Kev Tshawb Fawb Tom Qab Dej Dej Dej thiab Nws Lub Luag Haujlwm hauv Cold Chain Logistics: Vim Li Cas Cov Dej Hiav Txwv Tshav Kub Kub Thaum Tshav Kub Kub
Cov dej khov nab kuab, nrog rau qhov chaw khov ntawm 0 ° C, yog ib qho ntawm cov khoom siv hluav taws xob zoo tshaj plaws thiab siv dav hauv cov khoom siv txias txias, tshwj xeeb tshaj yog rau kev thauj khoom tshiab. Tab sis vim li cas cov dej khov tswj qhov kub tsis tu ncua thaum nws yaj? Kab lus no tshawb txog kev tshawb fawb tom qab qhov tshwm sim no thiab nws cov kev siv tswv yim.
1. Nkag siab txog Molecular Dynamics thiab Thermodynamics
Molecular Dynamics (MD)yog ib txoj kev suav siv los simulate thiab kwv yees qhov kev txav ntawm cov molecules. Nws pab hauv kev kawm theem kev hloov pauv thiab hloov hluav taws xob los ntawm kev daws Newton qhov sib npaug ntawm cov lus tsa suab.
Molecular Thermodynamicstxuas ntxiv thermodynamic txoj kev xav thiab molecular physics. Nws piav qhia txog macroscopic phenomena zoo li theem kev hloov pauv thiab qhov sib npaug ntawm qhov sib npaug ntawm cov molecular. Cov ntawv thov tseem ceeb muaj xws li tshuaj tiv thaiv kab mob, theem hloov pauv, thiab kev daws teeb meem.
2. Microscopic Perspective ntawm dej khov thiab yaj
- Cov txheej txheem khov (kua rau khoom):
Raws li dej txias, molecular motion slows, stabilizing hydrogen bonds thiab tsim ib tug orderly hexagonal lattice qauv (ice). Cov txheej txheem no tso tawm latent cua sov. - Cov txheej txheem melting (Solid to kua):
Raws li cov dej khov yaj, cov cua sov absorbed lov hydrogen bonds yam tsis muaj qhov kub thiab txias. Qhov kev hloov pauv no absorbs latent cua sov, hloov cov dej khov rau hauv cov dej ua kua.
3. Vim li cas cov dej khov tuav qhov kub thiab txias thaum lub sij hawm yaj
Ntawm 0 ° C, lub zog hluav taws xob ntxiv yog siv los rhuav tshem hydrogen bonds (latent tshav kub), es tsis ua kom lub zog kinetic. Qhov no yog vim li cas dej tseem nyob ntawm 0 ° C kom txog thaum tag nrho cov dej khov tau yaj.
Cov ntsiab lus tseem ceeb:
- Latent Thaum tshav kub kub Absorption:Thaum lub sij hawm melting, lub zog hluav taws xob tawg hydrogen bonds es tsis txhob nce kub.
- Phase Transition:Qhov ntsuas kub tsis tu ncua ua kom muaj kev hloov pauv ruaj khov ntawm cov dej khov rau cov kua.
4. Kev siv qhov ntsuas kub tsis tu ncua hauv cov dej khov yaj
Cold Chain Logistics:
Cov dej khov ua kom tswj tau qhov kub thiab txias thaum lub sij hawm kev thauj mus los ntawm perishables thiab tshuaj. Qhov kub tsis tu ncua thaum lub sij hawm melting pab tswj cov khoom tshiab thiab ruaj khov.
Kev txuag zaub mov:
Lub Freezers siv cov dej khov kom ruaj khov rau sab hauv. Hauv cov chaw sab nraum zoov, cov dej khov ua kom cov zaub mov thiab dej txias txias rau lub sijhawm ntev.
Kev siv kho mob:
Ice packs nqus cua sov kom zoo, muab kev pab zoo rau kev raug mob los ntawm kev tswj qhov kub thiab txias.
Kev Ua Si Ua Si:
Dej khov yog ib qho kev ua kom txias txias rau kev noj mov thiab mus pw hav zoov, ua kom cov dej qab zib thiab cov khoom puas tsuaj nyob twj ywm tshiab.
Xaus
Cov cuab yeej tshwj xeeb ntawm cov dej khov kom tswj tau qhov ntsuas kub tsis tu ncua thaum lub sij hawm yaj ua lub luag haujlwm tseem ceeb hauv kev xa khoom txias, kev txuag zaub mov, thiab kev siv kho mob. Los ntawm kev siv lub hauv paus ntsiab lus no, kev lag luam tuaj yeem ua kom muaj kev tswj xyuas qhov kub thiab txias, txhim kho cov khoom zoo thiab ua kom lub neej ntev.
Post lub sij hawm: Aug-21-2024