Zeziphi iiparamitha zeyunithi yomzimba eziqhelekileyo ezisetyenziswayo zecompressor zomoya?
uxinzelelo
Amandla asebenza kwindawo yesiseko ye-square centimeter phantsi koxinzelelo oluqhelekileyo lwe-atmospheric yi-10.13N.Ngoko ke, uxinzelelo olupheleleyo lwe-atmospheric kwinqanaba lolwandle malunga ne-10.13x104N / m2, elilingana ne-10.13x104Pa (Pascal, iyunithi ye-SI yoxinzelelo).Okanye sebenzisa enye iyunithi esetyenziswa ngokuqhelekileyo: 1bar=1x105Pa.Okuphezulu (okanye ngaphantsi) usuka kumphakamo wolwandle, usezantsi (okanye ngaphezulu) uxinzelelo lwe-atmospheri.
Uninzi lweegeyiji zoxinzelelo zilinganiswe njengomahluko phakathi koxinzelelo kwisikhongozeli kunye noxinzelelo lwe-atmospheric, ukuze ufumane uxinzelelo olupheleleyo, uxinzelelo lomoya wendawo kufuneka longezwe.
ubushushu
Ubushushu begesi bunzima kakhulu ukubuchaza ngokucacileyo.Iqondo lobushushu lisimboli se-avareji yamandla e-kinetic yentshukumo ye-molecular yento kwaye yimbonakaliso edibeneyo yentshukumo ye-thermal yenani elikhulu leemolekyuli.Okukhona zihamba ngokukhawuleza iimolekyuli, kokukhona ubushushu buphakama.Ku-zero ngokupheleleyo, intshukumo iyayeka ngokupheleleyo.Ubushushu beKelvin (K) busekelwe kwesi siganeko, kodwa sisebenzisa isikali esifanayo njengeeyunithi zeCelsius:
T=t+273.2
T = iqondo lobushushu elipheleleyo (K)
t=Ubushushu beCelsius (°C)
Lo mfanekiso ubonisa ubudlelwane phakathi kweqondo lobushushu likaCelsius noKelvin.KuCelsius, u-0° ubhekisa kwindawo enomkhenkce wamanzi;ngelixa ku-Kelvin, u-0 ° ngu-zero ngokupheleleyo.
Umthamo wobushushu
Ubushushu luhlobo lwamandla, olubonakaliswa njengamandla e-kinetic yeemolekyuli eziphazamisekileyo zento.Ubungakanani bobushushu bento bubungakanani bobushushu obufunekayo ukunyusa ubushushu ngeyunithi enye (1K), ekwachazwa njengeJ/K.Ubushushu obuthile bento busetyenziswa kakhulu, oko kukuthi, ubushushu obufunekayo kubunzima beyunithi yento (1kg) ukutshintsha iqondo lobushushu beyunithi (1K).Iyunithi yobushushu obuthile yi-J/(kgxK).Ngokufanayo, iyunithi yomthamo wobushushu bemolar yi-J/(molxK)
cp = ukushisa okuthe ngqo kwingcinezelo eqhubekayo
cV = ubushushu obuthile kumthamo ongaguqukiyo
Cp = ubushushu obukhethekileyo be-molar kwixinzelelo rhoqo
I-CV = ubushushu obukhethekileyo be-molar kwivolumu engaguqukiyo
Ubushushu obuthile kuxinzelelo oluthe gqolo luhlala lulukhulu kunobushushu obuthile kumthamo ongaguqukiyo.Ubushushu obuthile bento abutshintshi.Ngokuqhelekileyo, iyanda njengoko ubushushu buphakama.Ngeenjongo eziphathekayo, ixabiso eliphakathi lobushushu obuthile linokusetyenziswa.cp≈cV≈c kulwelo kunye nezinto eziqinileyo.Ubushushu obufunekayo ukusuka ku-t1 ukuya ku-t2 ngu: P=m*c*(T2 –T1)
P = amandla obushushu (W)
m=ukuhamba kobunzima (kg/s)
c=ubushushu obuthile (J/kgxK)
T=iqondo lobushushu(K)
Isizathu sokuba kutheni i-cp inkulu kune-cV kukwandiswa kwerhasi phantsi koxinzelelo oluqhubekayo.Umlinganiselo we-cp ukuya kwi-cV ubizwa ngokuba yi-isentropic okanye i-adiabatic index, К, kwaye ngumsebenzi wenani le-athomu kwiimolekyuli zezinto.
impumelelo
Umsebenzi womatshini unokuchazwa njengemveliso yamandla asebenza kwinto kunye nomgama ohanjiweyo kwicala lamandla.Njengobushushu, umsebenzi luhlobo lwamandla anokukhutshelwa ukusuka kwenye into ukuya kwenye.Umahluko kukuba amandla athatha indawo yobushushu.Oku kuboniswa yirhasi ekwisilinda ecinezelwe yipiston ehambayo, oko kukuthi amandla atyhala ipiston adala ucinezelo.Ngoko ke amandla adluliselwa kwi-piston ukuya kwigesi.Oku kudluliselwa kwamandla ngumsebenzi we-thermodynamic.Iziphumo zomsebenzi zinokubonakaliswa ngeendlela ezininzi, njengokutshintsha kwamandla anokubakho, utshintsho lwamandla e-kinetic, okanye utshintsho kumandla obushushu.
Umsebenzi womatshini onxulumene nokutshintsha umthamo weegesi ezixubileyo yenye yezona nkqubo zibalulekileyo kubunjineli be-thermodynamics.
Iyunithi yomsebenzi yamazwe ngamazwe yiJoule: 1J=1Nm=1Ws.
amandla
Amandla ngumsebenzi owenziwe ngexesha leyunithi.Yimali ebonakalayo esetyenziselwa ukubala isantya somsebenzi.Iyunithi yayo ye-SI yi-watt: 1W=1J/s.
Ngokomzekelo, amandla okanye ukuhamba kwamandla kwi-compressor drive shaft ilingana ngamanani kunye nesixa sobushushu esikhutshwe kwinkqubo kunye nobushushu obusebenza kwigesi ecinezelweyo.
Ukuhamba komthamo
Umlinganiselo wokuqukuqela komthamo wenkqubo ngumlinganiselo womthamo wolwelo ngexesha leyunithi.Inokubalwa njenge: indawo enqamlezileyo apho izinto ezihamba khona ziphindaphindwe ngesantya esiphakathi.Iyunithi yamazwe ngamazwe yokuhamba kwevolumu yi-m3 / s.Nangona kunjalo, i-unit litre / second (l / s) iphinda isetyenziswe rhoqo kwi-compressor volumetric flow (ekwabizwa ngokuba yi-flow rate), echazwe njenge-standard litre / second (Nl / s) okanye ukuhamba komoya okukhululekile (l / s).I-Nl / s yinqanaba lokuhamba elibalwe kwakhona phantsi "kweemeko eziqhelekileyo", oko kukuthi, uxinzelelo luyi-1.013bar (a) kunye neqondo lokushisa ngu-0 ° C.Iyunithi esemgangathweni i-Nl/s isetyenziswa ikakhulu ukumisela isantya sokuqukuqela kobunzima.Ukuhamba komoya wamahhala (i-FAD), ukuphuma kwemveliso ye-compressor kuguqulwa kwi-air flow phantsi kweemeko zokungena (uxinzelelo lwe-inlet yi-1bar (a), ukushisa kwe-inlet yi-20 ° C).
Ingxelo: Eli nqaku liveliswe kwi-Intanethi.Umxholo wenqaku wenzelwe iinjongo zokufunda nokunxibelelana kuphela.I-Air Compressor Network ihlala ingathathi hlangothi ngokubhekiselele kwizimvo kwinqaku.I-copyright yenqaku lelombhali wokuqala kunye neqonga.Ukuba kukho naluphi na ulwaphulo-mthetho, nceda uqhagamshelane nathi ukuze ulucime.