Cov khoom siv tub yees yog ib qho khoom siv uas hloov cua sov los ntawm qhov qis - qhov kub ntawm qhov khoom mus rau qhov siab - qhov kub thiab txias los ntawm kev siv tshuab lossis tshuaj, yog li ua tiav qhov txias los yog tswj qhov kub tsawg - ib puag ncig. Nws lub hauv paus ntsiab lus tseem ceeb yog raws li txoj cai thib ob ntawm thermodynamics, ua kom tiav lub voj voog tub yees los ntawm plaub txheej txheem yooj yim: compression, condensation, expansion, thiab evaporation. Nyob ntawm txoj kev ua tub yees, cov khoom siv tub yees tuaj yeem muab faib ua ntau hom, nrog rau cov tshuab compression (xws li dej chillers), nqus, thiab thermoelectric.
Kev tswj qhov kub thiab txias: Kev lag luam- cov cuab yeej siv qib feem ntau ua tiav ± 0.5℃(xws li chav ntsuas dej chillers), thaum cov khoom lag luam feem ntau ua tiav ± 1-2℃.
Coefficient ntawm Kev Ua Tau Zoo (COP): COP ntawm cov cuab yeej siv tshuab compression tub yees yog feem ntau ntawm 3 thiab 6, thaum lub tshuab nqus cua txias qis dua (0.7-1.2).
Cov tub yees hom: Cov tub yees zoo ib puag ncig (xws li R134a thiab R410A) tau maj mam hloov cov Freon ib txwm siv- raws li cov tub yees.
