Hydrofluoroolefins (HFOs) yog cov organic compounds uas tsis muaj roj uas muaj hydrogen, fluorine thiab carbon. Tsis zoo li cov hydrofluorocarbons ib txwm muaj (HFCs) thiab chlorofluorocarbons (CFCs), uas yog saturated, HFOs yog olefins, lossis hu ua alkenes. HFOs tab tom raug tsim los ua "tiam plaub" refrigerants nrog lub peev xwm ua kom sov thoob ntiaj teb qis heev uas yog 0.1% ntawm HFCs. Cov khoom HFO muaj lub neej luv luv thiab raug cais ua pawg uas muaj xoom ODP (Ozone Depletion Potential) thiab GWP (Global Warming Potential) qis, muab lwm txoj hauv kev zoo dua rau ib puag ncig rau CFCs, HCFCs thiab HFCs.
Cov ua npuas dej polyurethane tsim los ntawm kev siv HFOs ua tus neeg sawv cev rau kev tshuab yog siv dav hauv kev lag luam tsheb thiab kev tsim kho hauv daim ntawv ntawm cov npuas dej yooj ywm thiab tawv yog tsav tsheb kev loj hlob ntawm kev lag luam HFO.
Lub sijhawm tshaj tawm: Lub Rau Hli-27-2022