Hauv kev lag luam tshuab ua dej khov, ammonia tub yees thiab fluorine tub yees yeej ib txwm yog qhov tseem ceeb ntawm kev sib cav. Kev xaiv ntawm txoj kev tub yees tuaj yeem ua rau kev lag luam, ib puag ncig thiab kev sib raug zoo. Tsab ntawv xov xwm no tsom xam cov xwm txheej ntawm ammonia, fluorine refrigerants thiab ammonia thiab fluorine tub yees tshuab, thiab qhia txog cov xwm txheej ntawm daim ntawv thov, cov teeb meem uas twb muaj lawm, thiab kev tshawb fawb cov lus qhia ntawm ob txoj kev tub yees hauv kev lag luam, uas yuav pab tib neeg kom nkag siab meej txog ob qho no. cov txheej txheem tub yees. Kom nkag siab.
1. Kev sib piv ntawm cov khoom ntawm ammonia refrigerant (R717) thiab fluorine refrigerant (R22 thiab R404A)
Hais txog kev nyab xeeb: qhov tawg thiab toxicity ntawm ammonia heev txwv nws daim ntawv thov, thiab nrog cov xov xwm nquag ntawm ammonia refrigeration systems nyob rau hauv xyoo tas los no, tib neeg muaj kev ntshai ntawm ammonia tub yees tshuab. Kev nyab xeeb siab ntawm fluorine tub yees yog qhov laj thawj tseem ceeb rau kev loj hlob sai ntawm fluorine tub yees hauv xyoo tas los.
Kev tiv thaiv ib puag ncig: ODP ntawm ammonia yog xoom, thiab GWP kuj yog xoom. R404A yog cov tub yees zoo ib puag ncig, thiab R22 tub yees vim nws qhov kev ua haujlwm tsis zoo ib puag ncig, cov teb chaws tsim yuav txwv nws daim ntawv thov ua ntej 2020. Tam sim no, cov neeg hauv kev lag luam tau nquag nrhiav lwm cov tub yees uas muaj kev nyab xeeb dua.
Material compatibility: Thaum ammonia muaj noo noo, nws yog corrosive rau tooj liab. Yog li ntawd, tooj liab thiab tooj liab alloys tsis tuaj yeem siv rau cov kav dej thiab cov li qub ntawm ammonia system. Muaj qee qhov kev txwv hauv kev xaiv cov khoom siv hauv lub cev. Fluorine refrigerants muaj tshuaj lom neeg thiab thermal stability, thiab theoretically lawv tsis corrosive rau tag nrho cov hlau. Kev cuam tshuam nrog dej: cov dej tso cai ntawm ammonia tsawg dua {{0}}.2 feem pua . Vim hais tias ammonia yog yooj yim soluble hauv dej, txawm tias muaj cov kab dej ntau, nws yuav tsis tshwm "ice plug" zoo li Freon, yog li nws yog qhov yuav tsum tau ua kom qhuav ammonia tub yees rau hauv cov kav dej. Cov kev cai tsis nruj li Freon. Freon yog ib qho nyuaj rau yaj hauv dej, yog li yog tias muaj dej hauv qhov system, nws yooj yim ua rau cov dej khov txhaws. Feem ntau peb muaj lub tshuab lim dej hauv qhov system. Kev sib cuam tshuam nrog cov roj: Tam sim no, cov roj lubricating ntawm ammonia tub yees system yog cov roj ntxhia, uas tsis tuaj yeem sib xyaw nrog ammonia. Cov khoom siv xws li roj cais thiab cov roj ntim roj feem ntau yog ntsia kom rov qab cov roj lubricating rau lub compressor los ntawm kev tswj tsis siv neeg lossis phau ntawv tswj. R404A tsis yog miscible nrog cov roj ntxhia thiab roj alkylbenzene, tab sis nws tuaj yeem ua rau miscible nrog polyester roj (POE). Txawm li cas los xij, ntawm qhov kub thiab txias (nyob ib ncig ntawm 50 degree), yuav muaj kev sib cais tsis sib haum, thiab R22 kuj yog me ntsis soluble hauv lubricating roj. Yog li ntawd, qhov loj-scale fluorine tub yees tshuab feem ntau yog nruab nrog roj thiab roj reservoirs. Siv R404A ua piv txwv. Qhov sib txawv ntawm ob lub compressors tsuas yog cov tub yees xwb. Sib piv lub peev xwm txias ntawm R717, R22 thiab R404A nyob rau hauv tib lub evaporating kub ({10}} degree), condensation kub (45 degree), kua subcooling (0K) thiab suction superheating (10K). Ammonia muaj qhov zoo dua li cov tshuaj fluorine nyob rau hauv cov nqe lus ntawm lub peev xwm txias, COP, thiab huab cua ntws. Txawm li cas los xij, qhov cua kub ntawm R717 yog ntau dua li ntawm R22 thiab R404A, uas yuav ua rau kom muaj kev teeb tsa ntawm cov khoom siv. Ammonia muaj lub peev xwm loj dua rau ib chav tsev ntawm fluorine, qhia tias ammonia muaj peev xwm ua tau zoo dua. Txawm li cas los xij, thaum lub evaporation kub nce mus txog -33.33 degree, lub ntsuas qhov siab ntawm ammonia yog 0. Txhawm rau kom tsis txhob lub kaw lus ua haujlwm nyob rau hauv qhov tsis zoo, ammonia feem ntau yog siv rau cov tshuab uas qhov kub ntawm evaporation siab tshaj {{20. }}.33 degree.
xov xwm-CBFI-img
2. System complexity
Tube ice tshuab Ammonia tub yees yog lub twj tso kua mis-siv system. Txij li thaum cov roj ntxhia lubricating roj siv nyob rau hauv ammonia tub yees system tsis yog miscible nrog ammonia, ammonia system yog qhov tseem ceeb rau cov roj separators, roj sau thiab lwm yam khoom siv los xyuas kom meej cov roj rov qab ntawm lub system thiab txo qhov system kub, kom cov ammonia. roj system yog heev nyuaj. Cov no ua rau cov ammonia system loj, ntau lub tshuab pabcuam, cov kav dej sib txuas, ntau lub li qub, kev tsim kho nyuaj, thiab siv sijhawm ntev. Cov txheej txheem fluorine muaj cov qauv compact, me me hneev taw, thiab ob peb yam khoom siv. Kev teeb tsa ntawm chav tsev tau ua tiav heev, thiab feem ntau ntawm nws tuaj yeem ua tiav hauv lub Hoobkas ntawm chav tsev khoom.
3. Cov cuab yeej siv peev
Cov khoom siv ammonia suav nrog ntau yam khoom siv, feem ntau suav nrog compressors, evaporators, condensers, roj separators, siab thiab tsis tshua muaj siab cia tso tsheb hlau luam, intercoolers, recoolers, ammonia separators, tsis tshua muaj siab circulation tank, thiab thaum muaj xwm ceev ammonia tso tawm. , Cua vent, roj collector, ammo
