Imaphi amapharamitha weyunithi ebonakalayo esetshenziswa kakhulu yama-compressor emoyeni?
ingcindezi
Amandla asebenza endaweni eyisisekelo eyisentimitha-skwele engu-1 ngaphansi kokucindezela okujwayelekile komkhathi ngu-10.13N.Ngakho-ke, umfutho womoya ophelele ezingeni lolwandle cishe u-10.13x104N/m2, olingana no-10.13x104Pa (Pascal, iyunithi ye-SI yokucindezela).Noma sebenzisa enye iyunithi evame ukusetshenziswa: 1bar=1x105Pa.Uma uphakeme (noma uphansi) usuka ezingeni lolwandle, uphansi (noma ngaphezulu) umfutho womkhathi.
Amageji amaningi okucindezela alinganiswa njengomehluko phakathi kwengcindezi esitsheni kanye nomfutho womkhathi, ngakho-ke ukuze uthole ukucindezela okuphelele, ukucindezela komkhathi wendawo kufanele kwengezwe.
izinga lokushisa
Izinga lokushisa legesi linzima kakhulu ukulichaza ngokucacile.Izinga lokushisa liwuphawu lwamandla e-kinetic amaphakathi okunyakaza kwamangqamuzana ento futhi kuwukubonakaliswa okuhlangene kokunyakaza okushisayo kwenani elikhulu lama-molecule.Lapho amangqamuzana enyakaza ngokushesha, izinga lokushisa liyaphakama.Kuziro ophelele, ukunyakaza kuma ngokuphelele.Izinga lokushisa lika-Kelvin (K) lisekelwe kulesi simo, kodwa lisebenzisa amayunithi esikali afanayo njengeCelsius:
T=t+273.2
T = izinga lokushisa eliphelele (K)
t=Izinga lokushisa likaCelsius (°C)
Isithombe sibonisa ubudlelwano phakathi kwezinga lokushisa likaCelsius noKelvin.KuCelsius, u-0° ubhekisela endaweni ebanda amanzi;kuyilapho ku-Kelvin, u-0° unguziro ophelele.
Amandla okushisa
Ukushisa kuwuhlobo lwamandla, olubonakaliswa njengamandla e-kinetic ama-molecule e-disordered of matter.Umthamo wokushisa wento inani lokushisa elidingekayo ukuze kwenyuswe izinga lokushisa ngeyunithi eyodwa (1K), eliphinde livezwe njengokuthi J/K.Ukushisa okuqondile kwento kusetshenziswa kakhulu, okungukuthi, ukushisa okudingekayo kuyunithi yesisindo somzimba (1kg) ukushintsha izinga lokushisa leyunithi (1K).Iyunithi yokushisa okuthile ngu-J/(kgxK).Ngokufanayo, iyunithi yomthamo wokushisa we-molar ngu-J/(molxK)
cp = ukushisa okuqondile ngokucindezelwa njalo
cV = ukushisa okuthile ngevolumu engashintshi
I-Cp = ukushisa okuqondile kwe-molar ngokucindezela njalo
I-CV = ukushisa okukhethekile kwe-molar ngevolumu engashintshi
Ukushisa okukhethekile ekucindezelweni okungaguquki kuhlala kukhulu kunokushisa okuthile ngevolumu engashintshi.Ukushisa okuqondile kwento akuhlali njalo.Ngokuvamile, liyakhula njengoba izinga lokushisa likhuphuka.Ngezinjongo ezingokoqobo, inani elimaphakathi lokushisa okuthile lingasetshenziswa.cp≈cV≈c yezinto eziwuketshezi neziqinile.Ukushisa okudingekayo kusukela kuzinga lokushisa elingu-t1 ukuya ku-t2 ngu: P=m*c*(T2 –T1)
P = amandla ashisayo (W)
m=ukugeleza kwenqwaba (kg/s)
c=ukushisa okukhethekile (J/kgxK)
T=izinga lokushisa(K)
Isizathu esenza i-cp ibe nkulu kune-cV ukunwetshwa kwegesi ngaphansi kwengcindezi engapheli.Isilinganiso se-cp kuya ku-cV sibizwa ngokuthi inkomba ye-isentropic noma i-adiabatic, К, futhi iwumsebenzi wenani lama-athomu kuma-molecule ento.
impumelelo
Umsebenzi wemishini ungachazwa njengomkhiqizo wamandla asebenza entweni kanye nebanga elihanjwa lapho libheke khona amandla.Njengokushisa, umsebenzi uwuhlobo lwamandla olungadluliswa lusuka kwenye into luye kwenye.Umehluko ukuthi amandla ashintsha izinga lokushisa.Lokhu kuboniswa igesi ekusilinda icindezelwa ipiston elinyakazayo, okungukuthi amandla aphusha ipiston adala ukucindezelwa.Ngakho-ke amandla adluliswa esuka ku-piston aye kwigesi.Lokhu kudluliswa kwamandla kuwumsebenzi we-thermodynamic.Imiphumela yomsebenzi ingavezwa ngezindlela eziningi, njengezinguquko emandleni angaba khona, izinguquko zamandla e-kinetic, noma izinguquko kumandla okushisa.
Umsebenzi wemishini ohlobene nokushintshwa kwevolumu yamagesi axubile ungenye yezinqubo ezibaluleke kakhulu ku-thermodynamics yobunjiniyela.
Iyunithi yomsebenzi yamazwe ngamazwe yi-Joule: 1J=1Nm=1Ws.
amandla
Amandla umsebenzi owenziwa ngesikhathi seyunithi.Inani elibonakalayo elisetshenziselwa ukubala isivinini somsebenzi.Iyunithi yayo ye-SI ingu-watt: 1W=1J/s.
Isibonelo, amandla noma ukugeleza kwamandla ku-compressor drive shaft ngokwezinombolo zilingana nesamba sokushisa esikhishwe ohlelweni kanye nokushisa okusebenza kugesi ecindezelweyo.
Ukugeleza kwevolumu
Izinga lokugeleza kwe-volumetric yesistimu isilinganiso sevolumu yoketshezi ngesikhathi seyunithi.Ingabalwa njengokuthi: indawo enqamula ingxenye lapho okugeleza khona kuphindaphindwa ngesivinini sokugeleza esimaphakathi.Iyunithi yamazwe ngamazwe yokugeleza kwevolumu ingu-m3/s.Kodwa-ke, iyunithi ilitha/yesibili (l/s) nayo ivamise ukusetshenziswa ekugelezeni kwevolumu ye-compressor (ebuye ibizwe ngokuthi izinga lokugeleza), evezwa njengelitha elijwayelekile/isekhondi (Nl/s) noma ukugeleza komoya kwamahhala (l/ s).I-Nl/s izinga lokugeleza elibalwa kabusha ngaphansi “kwezimo ezijwayelekile”, okungukuthi, ingcindezi ingu-1.013bar (a) futhi izinga lokushisa lingu-0°C.Iyunithi ejwayelekile Nl/s isetshenziswa kakhulu ukunquma izinga lokugeleza kwenqwaba.Ukugeleza komoya kwamahhala (FAD), ukugeleza kokuphuma kwe-compressor kuguqulwa kube ukugeleza komoya ngaphansi kwezimo zokungena (ingcindezi yokungena yi-1bar (a), izinga lokushisa lokungena liyi-20 ° C).
Isitatimende: Lesi sihloko senziwa kabusha kusukela ku-inthanethi.Okuqukethwe yi-athikili okwezinjongo zokufunda nokuxhumana kuphela.I-Air Compressor Network ihlala ingathathi hlangothi mayelana nemibono ekusihloko.I-copyright ye-athikili ingeyombhali wokuqala kanye nenkundla.Uma kukhona ukwephulwa komthetho, sicela usithinte ukuze ukususe.