Udindo wa Njira Zosinthira Zinthu Powonjezera Kugwira Ntchito kwa Ma Turbine a Madzi
Malo opangira magetsi pogwiritsa ntchito madzi (PLTA) ndi amodzi mwa magwero odalirika kwambiri a mphamvu zongowonjezwdwanso chifukwa amagwiritsa ntchito mphamvu yamadzi komanso mphamvu ya kayendedwe ka madzi popanga magetsi. Kumbuyo kwa ntchito ya malo opangira magetsi pogwiritsa ntchito madzi pali zinthu zingapo zomwe zimagwiritsidwa ntchito popanga magetsi: damu kapena dziwe losungira madzi, njira yolowera madzi, njira yotumizira madzi, penstock, turbine, jenereta, ndi makina oyendera magetsi. Chinthu chimodzi chomwe nthawi zambiri anthu sachidziwa—komabe chofunikira kwambiri pakugwira ntchito bwino komanso kupitiriza—ndi njira yosinthira madzi. Njirayi imagwira ntchito yofunika kwambiri pakulamulira kayendedwe ka madzi, kuteteza kuyika kwake, ndikusunga turbine ikugwira ntchito bwino kwambiri.
Kumvetsetsa Njira Zosinthira mu Machitidwe a Mphamvu ya Madzi
Kawirikawiri, njira yosinthira madzi ndi njira ina yoperekera madzi kuti ichotse madzi ena kapena onse otuluka mu ngalande yaikulu. Pankhani ya malo opangira magetsi, njira zosinthira madzi zingagwiritsidwe ntchito panthawi yomanga, kukonza, kapena panthawi yamavuto oopsa a madzi monga kusefukira kwa madzi. Ngakhale m'mapangidwe ena njirazi zimakhala zakanthawi kochepa (makamaka panthawi yomanga madamu), m'malo ambiri opangira magetsi amakono, njira zosinthira madzi zimasungidwanso ngati gawo la njira yotetezera yogwirira ntchito.
Njira zosinthira nthawi zambiri zimakhala ndi zida zowongolera monga zipata zotulutsira zinyalala, malo otayira zinyalala, njira zotayira madzi, malo oti anthu azimitse, ndi zida zonyamula mphamvu kuti zitsimikizire kuti njira yosinthira ndi yotetezeka komanso kuti isawononge pansi pa madzi. Mwanjira ina, njira zosinthira zimagwira ntchito ngati "ma valve" akuluakulu pa sikelo ya mtsinje omwe angasinthe kugawa kwa madzi kuti asunge kukhazikika kwa malo akuluakulu.
Kugwira Ntchito Bwino kwa Turbine ndi Kukhudza Zinthu za Hydraulic
Kugwira ntchito bwino kwa turbine yamagetsi yamadzi kumakhudzidwa kwambiri ndi momwe madzi amagwirira ntchito m'turbine. Ma turbine—kaya Francis, Kaplan, kapena Pelton—amapangidwira kuti azigwira ntchito bwino mkati mwa mutu winawake (kutalika kwa madzi) ndi kuchuluka kwa kayendedwe ka madzi. Pakakhala kusinthasintha kwakukulu kwa kayendedwe ka madzi, kulowa kwa zinyalala ndi dothi, kapena kupanga ma vortice ndi kugwedezeka kwa madzi m'malo olowera, kugwira ntchito bwino kwa turbine kumatha kuchepa. Kuchepa kwa magwiridwe antchito kumeneku sikungotanthauza kuchepa kwa mphamvu zamagetsi komanso kuwonongeka kwa zigawo (ma runners, guide vanes, seals), kuonjezera ndalama zosamalira.
Apa ndi pomwe njira zosinthira madzi zimagwira ntchito: sizimangoyendetsa madzi okha, koma zimathandiza kuonetsetsa kuti madzi olowa mu turbine ndi okhazikika, oyera, komanso monga momwe adapangidwira.
1. Kukhazikitsa Kutuluka kwa Madzi ndi Kuchepetsa Kusinthasintha kwa Kutuluka kwa Madzi
Njira zosinthira magetsi zimathandiza ogwiritsa ntchito magetsi amadzi kusintha kayendedwe ka madzi kulowa mu makina a turbine. Pamene madzi akuyenda mumtsinje akuwonjezeka kwambiri nthawi yamvula, si madzi onse omwe amafunika kukakamizidwa kudzera mu intake ndi turbine. Ngati madzi akuyenda apitirira mphamvu ya kapangidwe ka njira yotumizira kapena penstock, kutayika kwa mphamvu chifukwa cha kugwedezeka, kutayika kwa mutu, komanso ngakhale chiopsezo cha nyundo yamadzi mu makina a mapaipi kungachitike.
Mwa kutsegula njira yosinthira, kutulutsa kochulukirapo kumatha kusinthidwa, zomwe zimapangitsa kuti kuyenda kwa turbine kukhale mkati mwa malo oyenera ogwirira ntchito. Kukhazikika kwa kutulutsa kumeneku ndikofunikira chifukwa ma turbine nthawi zambiri amakhala ndi magwiridwe antchito ochepa akamagwira ntchito kutali ndi komwe adapangidwira. Mwachitsanzo, mu turbine ya Francis, kugwira ntchito motsika kwambiri kapena mokwera kwambiri kutulutsa kumatha kuyambitsa kugwedezeka ndi kugwedezeka, zomwe zimapangitsa kuti magwiridwe antchito achepe komanso kuwonongeka kwa zinthu.
2. Chepetsani Kulowa kwa Zinyalala ndi Zinthu Zolimba
Chimodzi mwa adani akuluakulu a mphamvu ya turbine ndi matope, makamaka mchenga ndi tinthu tating'onoting'ono tomwe timayamwa. Madzi oundana kwambiri akalowa mu turbine, malo othamanga ndi zinthu zomwe zimatsogolera kuyenda kwa madzi zimatha kuwonongeka. Izi zimapangitsa kuti mawonekedwe a hydraulic asinthe, kukwera kwa kukangana, komanso kuchepa pang'onopang'ono kwa mphamvu.
Njira zosinthira madzi zimakhala ngati njira yotulutsira madzi pang'ono kuti madzi azinyamula zinthu zambiri zamatope—monga, nthawi ya kusefukira kwa madzi komwe kuli matope ambiri. Mwa kusuntha madzi oundana kupita ku njira yosinthira madzi ndikuyika patsogolo madzi olamulidwa bwino kupita ku njira yolowera madzi (nthawi zambiri kuphatikiza ndi beseni lokhazikika kapena msampha wa mchenga), ubwino wa madzi omwe amabweretsa turbine umakula. Pakapita nthawi, izi zimachepetsa kuchuluka kwa kusweka kwa madzi, zimachepetsa kuchuluka kwa kusinthidwa kwa madzi, komanso zimasunga magwiridwe antchito apamwamba a turbine.
3. Kuchepetsa Chiwopsezo cha Zinyalala ndi Kutsekeka kwa Madzi
Kuwonjezera pa dothi, zinyalala zoyandama monga nthambi, masamba, pulasitiki, komanso matabwa zimatha kutsekereza zinyalala ndi malo olowera. Kutsekeka kumayambitsa kutayika kwina kwa mutu chifukwa cha kutsekeka kwa madzi, zomwe zimachepetsa mphamvu yogwira ntchito ya turbine. Ngati ikakula kwambiri, ikhoza kusokoneza madzi ndikupangitsa kuti turbine igwe, zomwe zingakhudze chitetezo cha chipangizocho.
Njira zosinthira madzi zingagwiritsidwe ntchito kutaya zinyalala zambiri, makamaka mvula yamphamvu komanso mafunde onyamula zinthu kuchokera kumtunda. Mwa kuchepetsa zinyalala zomwe zikupita kumalo olowera madzi, njira yosefera imagwira ntchito molimbika pang'ono ndipo kutayika kwa mutu kumachepa. Izi zikutanthauza kuti mphamvu zambiri zomwe madzi amatha kugwiritsa ntchito zimasanduka mphamvu yamakina ndi turbine—m'malo motayika ngati kukangana.
4. Sungani Mutu Wabwino Ndipo Chepetsani Kutayika kwa Mphamvu
Kugwira ntchito bwino kwa turbine sikungodalira momwe turbine ilili komanso momwe turbine ilili. Kugwira ntchito bwino kwa turbine ndi kusiyana kwa mphamvu pakati pa madzi akumtunda ndi akumunsi pambuyo pochotsa zotayika panjira. Pamene njiwa yayikulu ikakakamizika kulola kutulutsa mphamvu mopitirira muyeso, kutayika kwa mphamvu chifukwa cha kukangana ndi kugwedezeka kumawonjezeka. Mwa kupititsa zina mwa zotayikazo kudzera m'njira zosinthira, kuyenda kwa madzi mu njiwa yayikulu kumawongoleredwa bwino ndipo zotayika zimatha kuchepetsedwa.
Kuphatikiza apo, njira zosinthira madzi zimathandiza kuyang'anira kuchuluka kwa madzi m'madzi. Pazifukwa zina, kusunga kuchuluka kwa madzi pamlingo woyenera kumapereka mutu wokhazikika. Kukhazikika kwa mutu ndikofunikira chifukwa ngakhale kusintha pang'ono kumatha kukhudza mwachindunji kutulutsa kwa turbine (P ∝ Q × H). Mwa kuwongolera bwino kayendedwe ka madzi kudzera mu dongosolo losinthira madzi, chomera chamagetsi chamadzi chimatha kusunga kuphatikiza kwa kutulutsa madzi ndi mutu pafupi ndi malo ake ogwirira ntchito bwino kwambiri.
5. Imathandizira Kukonza Popanda Kuwononga Magwiridwe Antchito a Dongosolo
Kuchita bwino sikuti nthawi zonse kumatanthauza "mphamvu yambiri yomwe ilipo masiku ano," komanso kumaphatikizapo kupezeka ndi kudalirika kwa nthawi yayitali. Mizere yopingasa imalola kuti magawo a dongosololi asinthidwe panthawi yowunikira ndi kukonza, monga kuyeretsa malo olowera, kukonza zipata zotseguka, kapena kuchotsa mchenga. Popanda mizere yopingasa, kukonza kungafunike nthawi yayitali yogwira ntchito kapena kuchitidwa pansi pa zinthu zoopsa.
Pogwiritsa ntchito ntchito zina kunja, wogwiritsa ntchitoyo amatha kuchita ntchito yokonzedwa bwino yamadzimadzi, kusunga chipangizo cha turbine chikugwira ntchito (osachepera pang'ono), ndikuchepetsa nthawi yogwira ntchito. Nthawi yochepa yogwira ntchito imatanthauza kuchuluka kwa mphamvu, kupanga mphamvu zambiri pachaka, komanso ndalama zogwirira ntchito bwino pa kWh.
6. Chitetezo cha Turbine ku Zochitika Zazikulu ndi Ntchito Zosazolowereka
Pa nthawi ya kusefukira kwa madzi kwakukulu, katundu wa hydraulic pa nyumba zolowera ndi zolumikizira madzi amatha kuwonjezeka. Ngati madzi ambiri akuyenda movutikira kudzera munjira ya turbine, chiopsezo cha kuwonongeka chimawonjezeka: kupanikizika kwambiri, kugwedezeka, kukokoloka kwa nthaka, ndi kulowa kwa zinthu zazikulu zomwe zingaike pachiwopsezo wothamanga. Njira zosinthira mpweya zimagwira ntchito ngati njira yotetezera kuti zinthu zisamagwire ntchito mopitirira malire a kapangidwe kake.
Ma turbine otetezedwa ku zochitika zoopsa adzapitiriza kugwira ntchito yawo kwa nthawi yayitali. Izi mwanjira ina zimathandiza kuti chomera chamagetsi chizigwira ntchito bwino chifukwa mayunitsi athanzi amagwira ntchito mogwirizana ndi kapangidwe kawo ndipo sawonongeka msanga.
Kuphatikiza Mapangidwe: Chinsinsi cha Njira Zothandiza Zosinthira
Kuti zithandizire kugwira ntchito bwino kwa turbine, njira zosinthira ziyenera kupangidwa poganizira za hydrology ya m'deralo, mapangidwe a matope, ndi zofunikira pakugwira ntchito. Kuchuluka kwa njira zosinthira kuyenera kukhala kokwanira kuti zigwirizane ndi kutulutsa madzi kwapadera, ndipo zomangamanga zowongolera ziyenera kulola kuti zichitike mwachangu. Kuphatikiza apo, zotsatira za kutsika kwa madzi ziyenera kuganiziridwa: kusuntha kutuluka kwa madzi kwakukulu popanda kuletsa mphamvu kungayambitse kukokoloka kwa mitsinje ndi mavuto azachilengedwe.
Kuphatikiza ndi machitidwe owunikira monga zoyezera madzi, zoyezera madzi, ndi zowongolera zodziyimira pawokha za chipata ndikofunikira kwambiri. Ndi deta yeniyeni, kusintha kumatha kuchitika molondola: kusuntha nthawi yamadzi ambiri, kuchepetsa zinyalala, kapena kusunga madzi okwanira.
Mapeto
Njira zosinthira magetsi sizimangowonjezera mphamvu zokha, koma ndi gawo lofunika kwambiri pa njira yosungira mphamvu zamagetsi zamagetsi. Kudzera mu kuthekera kwawo kokhazikitsa mphamvu zotulutsa madzi, kuchepetsa zinyalala ndi zinyalala, kusunga mutu wogwira ntchito bwino, kuthandizira kukonza, ndikuteteza magetsi zamagetsi ku zinthu zoopsa kwambiri, njira zosinthira magetsi zimathandiza mwachindunji komanso mwanjira ina kukulitsa mphamvu ndi kudalirika kwa magetsi opangira magetsi. Mu kayendetsedwe ka magetsi amakono amagetsi, komwe kumafuna kupanga mphamvu zambiri, ndalama zochepa zosamalira, komanso kugwira ntchito motetezeka, njira zosinthira magetsi ndi ndalama zomwe zimayikidwa mu zomangamanga zomwe zimakhudza kwambiri—ponse pa magwiridwe antchito a makina amakono komanso mtsogolo mwa chomeracho.
