Yuav luag nrhiav tau cov khoom siv hloov cov roj txias tiam thib ob thiab thib peb!
Thaum lub Cuaj Hlis 15, 2021, "Kigali Amendment rau Montreal Protocol on Substances that Deplete the Ozone Layer" tau pib siv rau Suav teb. Raws li "Montreal Protocol", cov roj txias HCFC tiam ob yuav tsum tsis txhob siv rau xyoo 2030. Qhov kev hloov kho no yuav tsum tau ua kom txog xyoo 2050, kev siv HFCs thoob ntiaj teb yuav poob qis li 85%.
Qhov no yog ib qho tseem ceeb hauv cov txheej txheem tshem tawm cov tub yees, thiab nws kuj xa tawm ib qho cim tseem ceeb hauv kev nom kev tswv tias lub zej zog thoob ntiaj teb tau txiav txim siab kom tshem tawm kev siv HFCs.
Tib lub sijhawm, nrog rau kev tsim kom muaj lub hom phiaj "dual-carbon" hauv tebchaws thiab kev siv maj mam ntawm txoj cai tswj hwm HFCs tub yees tiam thib peb, nws yog qhov tseem ceeb kom kawm HCFC, HFCs hloov cov tshuaj thiab cov thev naus laus zis cuam tshuam.
Cov tub yees nkag mus rau lub caij nyoog ntawm tus nqi GWP qis, thiab qhov teeb meem flammability tsis tuaj yeem tsis quav ntsej!
Feem ntau hais lus, kev siv cov tshuaj txias uas yooj yim hlawv nrog GWP tus nqi qis los hloov HCFC thiab lwm cov pa roj uas muaj fluorine yog suav tias yog ib qho kev daws teeb meem zoo thiab pheej yig dua. Txawm li cas los xij, kev tshawb fawb tau qhia tias cov tshuaj txias ib txwm tsis tshua ua tau raws li txhua qhov xav tau ntawm cov tshuaj txias yav tom ntej rau GWP qis, kev nyab xeeb, kev ua haujlwm thermodynamic thiab kev ua haujlwm ib puag ncig tib lub sijhawm.
Hauv lwm lo lus, ntau tus nqi GWP qis yog cov hluav taws kub hnyiab!
Tus qauv hauv tebchaws "Txoj Kev Ntsuas Tus lej thiab Kev Nyab Xeeb ntawm Cov Khoom Siv Txias" GB/T 7778-2017 faib cov tshuaj lom ntawm cov khoom txias rau hauv Chav Kawm A (tsawg mob lom ntev) thiab Chav Kawm B (mob lom ntev ntev), thiab kev kub hnyiab tau muab faib ua Chav Kawm 1 (Tsis muaj nplaim taws kis), Chav Kawm 2L (tsis muaj zog), Chav Kawm 2 (ua tau), thiab Chav Kawm 3 (flammable thiab tawg). Raws li GB/T 7778-2017, kev nyab xeeb ntawm cov khoom txias tau muab faib ua 8 pawg, uas yog: A1, A2L, A2, A3, B1, B2L, B2, thiab B3. Ntawm lawv, A1 yog qhov muaj kev nyab xeeb tshaj plaws thiab B3 yog qhov txaus ntshai tshaj plaws.
Yuav siv A2L HFO refrigerant li cas kom muaj kev nyab xeeb thiab siv tau zoo?
Txawm hais tias cov tshuab cua txias hauv tsev, cov tshuab cua txias hauv nruab nrab thiab lwm yam khoom siv tub yees tau raug sim rau kev ua haujlwm ntawm lub Hoobkas, tus nqi siv ntawm cov roj txias tau qhia. Txawm li cas los xij, ntau lub tshuab cua txias hauv nruab nrab loj thiab cov tshuab txias hauv kev lag luam yuav tsum tau muab cov roj txias ntim rau ntawm qhov chaw, ib yam li cov tshuab cua txias hauv tsev, cov khoom siv tub yees, cov khoom siv cia khoom txias, thiab lwm yam thaum lub sijhawm txij nkawm.
Ntxiv mus, vim muaj ntau hom evaporators siv rau hauv qee yam khoom siv, qhov them nqi refrigerant txawv. Ntxiv rau qhov chaw txij nkawm thiab teeb tsa, vim muaj cov xwm txheej tsawg, ntau tus neeg ua haujlwm txij nkawm them nqi refrigerant raws li kev paub dhau los. Tsis tas li ntawd, kev lag luam kuj tseem nkag siab heev rau qhov teeb meem ntawm refrigerant flammability.
Raws li qhov no, Chemours tau tsim R1234yf, R454A, R454B, R454C thiab lwm yam A2L uas tsis muaj zog thiab GWP refrigerants qis, thiab cog lus tias yuav txhawb nqa kev tsim qauv thiab kev cob qhia txog kev tshawb fawb kom daws tau cov kev pheej hmoo ntawm kev kub hnyiab.
Qib kev nyab xeeb A2L muaj cov yam ntxwv ntawm kev lom tsawg (A) thiab tsis muaj zog flammability (2L). Ntau cov tub yees A2L HFO muaj ob qho kev ua tau zoo thiab cov yam ntxwv GWP qis, thiab yog cov hloov pauv zoo tagnrho rau tiam dhau los ntawm HFC tub yees. Cov khoom A2L tsis yog tsuas yog siv dav hauv kev lag luam thoob ntiaj teb xwb, tab sis ntau lub tuam txhab hauv tsev kuj tau ua kom nrawm dua ntawm kev txhim kho thiab qhia cov hom tub yees tshiab no rau hauv cov ntawv thov tsim khoom. Piv txwv li, Johnson Controls siv Oteon™ XL41 (R-454B) hauv nws lub York ® YLAA scroll chiller rau kev lag luam European; Carrier kuj xaiv R-454B (uas yog) Raws li nws cov tub yees qis-GWP tseem ceeb, Carrier yuav siv R-454B hauv nws cov khoom siv tubular thiab cov khoom lag luam HVAC muag hauv North America txij li xyoo 2023. Hloov R-410A.
Lub sijhawm tshaj tawm: Lub Kaum Hli-23-2021