Umjikelezo wokuqandisa we-compressor onezigaba ezimbili ngokuvamile usebenzisa ama-compressor amabili, okuyi-compressor enomfutho ophansi kanye ne-compressor enomfutho ophezulu.
1.1 Inqubo yokwanda kwegesi yesiqandisi kusukela ekucindezelweni kokuhwamuka kuya ekucindezelweni kokujiya ihlukaniswe ngezigaba ezimbili
Isigaba sokuqala: Kucindezelwe i-compressor yesigaba sokucindezela okuphansi kuqala kuye kungcindezi ephakathi nendawo:
Isigaba sesibili: igesi engaphansi kwengcindezi ephakathi icindezelwa kakhulu ibe yingcindezi yokujiya yi-compressor enengcindezi ephezulu ngemva kokupholisa okuphakathi, bese umjikelezo wokuphindaphinda uqeda inqubo yokubanda.
Uma kukhiqiza amazinga okushisa aphansi, i-intercooler yomjikelezo wokuqandisa wezigaba ezimbili inciphisa izinga lokushisa lokungena kwe-refrigerant ku-compressor yesigaba sokucindezela okuphezulu, futhi inciphisa izinga lokushisa lokukhipha le-compressor efanayo.
Njengoba umjikelezo wokuqandisa wokucindezela wezigaba ezimbili uhlukanisa yonke inqubo yokuqandisa ibe yizigaba ezimbili, isilinganiso sokucindezelwa kwesigaba ngasinye sizoba ngaphansi kakhulu kunesokucindezela kwesigaba esisodwa, kunciphisa izidingo zamandla emishini futhi kuthuthukise kakhulu ukusebenza kahle komjikelezo wokuqandisa. Umjikelezo wokuqandisa wokucindezela wezigaba ezimbili uhlukaniswe waba umjikelezo wokuphola ophelele ophakathi nendawo kanye nomjikelezo wokuphola ongaphelele ophakathi nendawo ngokwezindlela ezahlukene zokupholisa eziphakathi nendawo; uma kusekelwe endleleni yokugoqa, ingahlukaniswa yaba umjikelezo wokugoqa wesigaba sokuqala kanye nomjikelezo wokugoqa wesigaba sesibili.
1.2 Izinhlobo zefriji zokucindezela ezinezigaba ezimbili
Iningi lezinhlelo zokuqandisa ezicindezelayo ezinezigaba ezimbili likhetha iziqandisi ezisezingeni eliphakathi neliphansi. Ucwaningo lokuhlola lubonisa ukuthi i-R448A kanye ne-R455a ziyizithathi ezilungile ze-R404A maqondana nokusebenza kahle kwamandla. Uma kuqhathaniswa nezinye izindlela ezingasetshenziswa esikhundleni sama-hydrofluorocarbon, i-CO2, njengoketshezi olusebenzayo olunobungani nemvelo, ingathatha indawo yeziqandisi ze-hydrofluorocarbon futhi inezici ezinhle zemvelo.
Kodwa ukufaka i-CO2 esikhundleni se-R134a kuzolimaza ukusebenza kohlelo, ikakhulukazi emazingeni okushisa aphezulu, ingcindezi yohlelo lwe-CO2 iphakeme impela futhi idinga ukwelashwa okukhethekile kwezingxenye ezibalulekile, ikakhulukazi i-compressor.
1.3 Ucwaningo Lokwenza Kahle Ngokuqandisa Ukucindezela Okunezigaba Ezimbili
Njengamanje, imiphumela yocwaningo lokwenza ngcono uhlelo lomjikelezo wokuqandisa olunezigaba ezimbili ilandelayo ikakhulukazi:
(1) Ngenkathi kwandiswa inani lemigqa yamashubhu ku-intercooler, ukunciphisa inani lemigqa yamashubhu ku-air cooler kungandisa indawo yokushintshana kokushisa kwe-intercooler ngenkathi kunciphisa ukugeleza komoya okubangelwa inani elikhulu lemigqa yamashubhu ku-air cooler. Uma sibuyela ekungeneni kwayo, ngokusebenzisa ukuthuthukiswa okungenhla, izinga lokushisa lokungena le-intercooler lingancishiswa cishe ngo-2°C, futhi ngesikhathi esifanayo, umphumela wokupholisa we-air cooler ungaqinisekiswa.
(2) Gcina imvamisa ye-compressor ephansi iqhubeka njalo, bese ushintsha imvamisa ye-compressor ephansi iqhubeka njalo, ngaleyo ndlela ushintshe isilinganiso somthamo wokulethwa kwegesi we-compressor ephansi iqhubeka njalo. Uma izinga lokushisa lokuhwamuka lihlala linjalo ku--20°C, i-COP ephezulu ingu-3.374, kanti isilinganiso esiphezulu sokulethwa kwegesi esihambisana ne-COP ngu-1.819.
(3) Ngokuqhathanisa izinhlelo eziningana ezivamile ze-CO2 transcritical ezimbili-stage compression refrigeration systems, kuphethwa ngokuthi izinga lokushisa lokukhipha igesi elipholile kanye nokusebenza kahle kwe-compressor yesigaba esinomfutho ophansi kunethonya elikhulu emjikelezweni ngengcindezi ethile, ngakho-ke uma ufuna ukuthuthukisa ukusebenza kahle kwesistimu, kubalulekile ukunciphisa izinga lokushisa lokukhipha igesi elipholile bese ukhetha i-compressor yesigaba esinomfutho ophansi esebenza kahle kakhulu.
Isikhathi sokuthunyelwe: Mashi-22-2023