Ma Turbine mu Zomera Zamagetsi
Ma turbine ndi chimodzi mwa zinthu zofunika kwambiri pamakina onse opangira magetsi. Pafupifupi mafakitale onse akuluakulu opangira magetsi—kaya amagwiritsa ntchito nthunzi, madzi, gasi, kapena mphepo—amadalira ma turbine kuti asinthe mphamvu yamadzimadzi kapena yoyenda kukhala mphamvu yamakina monga kuzungulira kwa shaft. Kuzungulira kumeneku kumayendetsa jenereta kuti ipange magetsi. Popanda ma turbine, njira yosinthira mphamvu m'mafakitale ambiri opanga magetsi sikanakhala yothandiza komanso yodalirika monga momwe tikudziwira masiku ano.
Tanthauzo ndi Ntchito ya Ma Turbine
Mwachidule, turbine ndi makina omwe amasintha mphamvu ya kinetic (kuyenda) ndi/kapena mphamvu yomwe ingakhalepo ya madzi kukhala mphamvu yozungulira. Madzi omwe akukambidwa akhoza kukhala nthunzi ya madzi (nthunzi), madzi a mtsinje kapena damu (hydro), mpweya wotentha (mpweya), kapena mphepo (mphepo). Ntchito yayikulu ya turbine mu power plant ndikupanga torque ndi kuzungulira kokhazikika pa shaft, kulola jenereta kuzungulira pa liwiro linalake kuti ipange magetsi pafupipafupi yoyenera (monga, 50 Hz ku Indonesia).
Ma turbine nawonso amathandiza pakusunga bata la makina opangira magetsi chifukwa liwiro lozungulira, malamulo oyendetsera madzi, ndi kulamulira katundu wa jenereta zimagwirizanitsidwa. Mu malo opangira magetsi amakono, ma turbine ali ndi makina owongolera apamwamba kuti atsimikizire kuti amagwira ntchito bwino komanso otetezeka.
Mfundo Yogwirira Ntchito ya Turbine
Mfundo yogwirira ntchito ya turbine kwenikweni imatsatira lingaliro la kusinthana kwa mphamvu. Madzi othamanga kwambiri akadutsa masamba a turbine, amathamanga kwambiri, zomwe zimapangitsa kuti rotor izungulire. Mphamvu ya madziwo imatayika chifukwa mphamvu zake zambiri zasinthidwa kukhala mphamvu yamakina.
Kawirikawiri, ma turbine amagawidwa m'magawo awiri akuluakulu kutengera momwe amagwiritsira ntchito mphamvu yamadzimadzi:
1. Mpweya Wopangira Mphamvu (Mpweya Wopangira Mphamvu)
Mu turbine ya impulse, madzi amatsogozedwa kudzera mu nozzle, zomwe zimapangitsa kuti liwiro lake liwonjezeke kwambiri, kenako amagunda masamba a turbine. Mphamvu ya impulse yochokera ku kusintha kwa mphamvu ya madzi imapangitsa kuti rotor izungulire. Chitsanzo chodziwika bwino ndi turbine ya Pelton yomwe ili mu hydroelectric power plant.
2. Reaction Turbine (Reaction Turbine)
Mu turbine yochitapo kanthu, kutsika kwa mphamvu ya mpweya kumachitika osati pa nozzle yokha komanso mkati mwa masamba a turbine. Madziwo amasinthasintha kuthamanga kwa mpweya ndi liwiro pamene akudutsa m'masambawo, zomwe zimapangitsa mphamvu ya mpweya yomwe imazungulira rotor. Zitsanzo zikuphatikizapo ma turbine a Francis ndi Kaplan amagetsi amadzi, komanso ma turbine ambiri a nthunzi m'malo opangira magetsi.
Mitundu ya Ma Turbine mu Zomera Zamagetsi
1. Chotenthetsera cha Nthunzi
Ma turbine a nthunzi amagwiritsidwa ntchito kwambiri m'mafakitale opanga magetsi opangidwa ndi malasha (PLTU), m'mafakitale opanga magetsi opangidwa ndi geothermal (PLTP), ndi m'mafakitale ena opanga magetsi opangidwa ndi biomass. Nthunzi yothamanga kwambiri imapangidwa kuchokera ku boiler (mu PLTU) kapena kuchokera ku malo osungira magetsi opangidwa ndi geothermal (mu PLTP). Kenako nthunzi imayendetsedwa kupita ku turbine kuti izungulire rotor.
Ma turbine a nthunzi amakhala ndi mphamvu zambiri akapangidwa ndi magawo angapo, kuyambira kupanikizika kwambiri, kupanikizika kwapakati, mpaka kupsinjika kochepa. Pambuyo podutsa mu turbine, nthunzi nthawi zambiri imabwezeretsedwa m'madzi mu condenser kuti ibwezeretsedwe mu dongosolo ngati kuzungulira kotsekedwa (Rankine cycle). Ubwino waukulu wa ma turbine a nthunzi ndi kuthekera kwawo kupanga mphamvu zambiri nthawi zonse, koma amafunikira zomangamanga zovuta monga ma boiler, ma condenser, ndi machitidwe ochizira madzi.
2. Turbine Yamadzi (Hydraulic Turbine)
Mu malo opangira magetsi (PLTA), mphamvu zomwe madzi angagwiritse ntchito chifukwa cha kusiyana kwa kutalika (mutu) ndi mphamvu ya kayendedwe ka madzi zimagwiritsidwa ntchito potembenuza turbine. Mitundu yodziwika bwino ya ma turbine amadzi ndi awa:
– Pelton Turbine: Yoyenera kugwiritsa ntchito mutu wautali komanso kuthamanga pang'ono kwa madzi. Imagwiritsa ntchito mfundo ya impulse, kutumiza madzi amphamvu kudzera mu nozzle kupita ku tsamba looneka ngati mbale.
– Francis turbine: Yoyenera kugwiritsa ntchito ma turbine apakatikati komanso ma turbine apakatikati. Mtundu uwu wa turbine ndi turbine yochitapo kanthu ndipo imagwiritsidwa ntchito kwambiri m'mafakitale akuluakulu opangira magetsi.
– Kaplan/Propeller Turbine: Yoyenera kugwiritsidwa ntchito pa injini yotsika komanso yothamanga kwambiri. Masamba ake amafanana ndi ma propeller ndipo nthawi zambiri amagwiritsidwa ntchito pa mitsinje ikuluikulu kapena madamu otsika.
Ma turbine amagetsi nthawi zambiri amakhala ndi mphamvu zambiri komanso ndalama zochepa zogwirira ntchito chifukwa safuna mafuta. Komabe, malo opangira magetsi amagetsi amafunika ndalama zambiri, malo oyenera, komanso kuganizira za zotsatira za chilengedwe ndi chikhalidwe cha anthu.
3. Chotenthetsera cha Gasi
Ma turbine a gasi amagwiritsidwa ntchito m'mafakitale opanga magetsi oyendetsedwa ndi gasi (PLTG) ndi m'mafakitale opanga magetsi ozungulira (PLTGU). Mfundo yake ndikugwiritsa ntchito mpweya wotentha kwambiri wochokera ku mafuta oyaka (monga gasi wachilengedwe) womwe umadutsa mu turbine ndikutembenuza shaft.
Turbine ya gasi imakhala ndi compressor yomwe imakanikiza mpweya, chipinda choyaka chomwe chimasakaniza mpweya ndi mafuta, ndi turbine yomwe imasintha mphamvu ya mpweya wotentha kukhala wozungulira. Ubwino wa turbine ya gasi ndi kuthekera kwake koyambitsa mwachangu, zomwe zimapangitsa kuti ikhale yoyenera kuwongolera katundu kapena zosowa za makina. Choyipa chake ndichakuti magwiridwe antchito a turbine ya gasi si okwera kwambiri ngati makina a nthunzi, koma izi zitha kukonzedwa bwino mu chomera chamagetsi chophatikizana (CCPP) pogwiritsa ntchito kutentha kotayira kuti apange nthunzi, zomwe zimayendetsa turbine yowonjezera ya nthunzi.
4. Chozungulira cha Mphepo
Ma turbine a mphepo ndi mtima wa zomera zamagetsi za mphepo (PLTB). Masamba ake amagwira mphamvu ya mphepo ndikutembenuza rotor yolumikizidwa ku jenereta kudzera mu gearbox kapena direct-drive system. Ma turbine amakono a mphepo ali ndi njira zowongolera pitch (blade angle) ndi yaw (blade orientation) kuti agwire mphamvu kwambiri ndikuteteza turbine mu mphepo yamphamvu.
Ubwino waukulu wa ma turbine amphepo ndi gwero lawo la mphamvu zongowonjezwdwa ndipo palibe mpweya woipa womwe umachokera pamene ukugwira ntchito. Vuto ndilakuti mphepo siikhazikika, kotero kuphatikiza mu gridi yamagetsi kumafuna kuyang'anira makina ndi mphamvu yochokera kuzinthu zina kapena kusungira mphamvu.
Zigawo Zazikulu za Ma Turbine mu Zomera Zamagetsi
Ngakhale mapangidwe a turbine amasiyana, zina mwa zigawo zazikulu nthawi zambiri zimaphatikizapo:
– Rotor ndi masamba: Zigawo zozungulira zomwe zimalandira mphamvu yamadzimadzi.
– Stator kapena nozzle/guide vane: Imatsogolera kuyenda kwa madzi kuti ngodya yolowera ikhale yoyenera.
– Shaft: Imatumiza kuzungulira kwa jenereta.
- Kunyamula: Kumathandizira shaft kuti ikhale yokhazikika komanso kuchepetsa kukangana.
– Chophimba/nyumba ya turbine: Chimateteza zigawo ndikuwongolera kayendedwe ka madzi.
- Njira yowongolera ndi kuteteza: Imawongolera liwiro, katundu, ndi chitetezo cha ntchito.
Mu ma turbine a nthunzi ndi gasi, palinso machitidwe ena monga ma governors, seals, ma greasing systems, ndi kugwedezeka ndi kuwunika kutentha kuti apewe kuwonongeka.
Kuchita Bwino, Kudalirika, ndi Kukonza
Kugwira ntchito bwino kwa turbine kumakhudzidwa kwambiri ndi kapangidwe ka tsamba, momwe madzi amayendera (kupanikizika, kutentha, kuchuluka kwa madzi), komanso ubwino wosamalira. Mu ma turbine a nthunzi, ubwino wa madzi ndi wofunika kwambiri chifukwa dothi ndi dzimbiri zimatha kuwononga masamba ndi mapaipi. Mu ma turbine a gasi, kutentha kwambiri kumatha kufulumizitsa kuwonongeka, zomwe zimafuna zipangizo zapadera komanso makina oziziritsira masamba.
Kukonza ma turbine nthawi zambiri kumaphatikizapo kuwunika pafupipafupi, kuyeza kugwedezeka, kusanthula mafuta, kuyang'ana masamba kuti awone ngati akukokoloka kapena ming'alu, komanso kukonzanso nthawi ndi nthawi. Kudalirika kwa ma turbine ndikofunikira kwambiri, chifukwa kuzimitsa mwadzidzidzi kumatha kusokoneza kwambiri makina amagetsi komanso kutayika kwachuma.
Udindo wa Ma Turbines mu Kusintha kwa Mphamvu
Pankhani ya kusintha kwa mphamvu, ma turbine akupitilizabe kugwira ntchito yofunika kwambiri. Malo opangira magetsi ndi mphepo amagwiritsa ntchito ma turbine kupanga magetsi kuchokera kuzinthu zongowonjezwdwanso. Ngakhale malo opangira magetsi amakono amadalira ma turbine ogwira ntchito bwino kwambiri kuti achepetse mpweya woipa pa kWh. Machitidwe ophatikizana, omwe amaphatikiza ma turbine a gasi ndi nthunzi, nawonso ndi mlatho wofunikira kwambiri ku mphamvu yoyera chifukwa amagwira ntchito bwino kuposa malo opangira magetsi achikhalidwe omwe amagwiritsa ntchito mafuta oyambira.
Kuphatikiza apo, ukadaulo wa ma turbine ukupitilira patsogolo: mapangidwe a masamba ozungulira mpweya, zipangizo zoteteza kutentha kwambiri, njira zowongolera zamagetsi zolondola kwambiri, komanso kuphatikiza kwakukulu ndi malo osungira mphamvu. Izi zimapangitsa ma turbine kukhala ogwira ntchito bwino, osinthasintha, komanso odalirika kuti akwaniritse zosowa zamagetsi zomwe zikukula komanso zosiyanasiyana.
Mapeto
Ma turbine ndi mtima wa mafakitale ambiri amphamvu, omwe amagwira ntchito ngati cholumikizira chachikulu pakusintha mphamvu yamadzimadzi kukhala mphamvu yamakina, kenako kukhala magetsi kudzera mu jenereta. Kaya mu fakitale yamagetsi yoyendetsedwa ndi malasha (PLTU), fakitale yamagetsi yamadzi (PLTA), fakitale yamagetsi yoyendetsedwa ndi gasi (PLTG/PLTGU), fakitale yamagetsi ya geothermal (PLTP), kapena fakitale yamagetsi yoyendetsedwa ndi mphepo (PLTB), ma turbine amatsimikiza magwiridwe antchito, kudalirika, ndi magwiridwe antchito a fakitale yamagetsi. Ndi kupita patsogolo kwaukadaulo komanso kufunikira kwa mphamvu yoyera, ntchito ya ma turbine ikukhala yofunika kwambiri. Kumvetsetsa momwe ma turbine amagwirira ntchito, mitundu yawo, ndi makhalidwe awo kumatithandiza kumvetsetsa momwe magetsi amapangira bwino komanso momwe machitidwe opangira magetsi angasinthidwire kuti akhale ndi tsogolo lokhazikika.
