Ijenereyitha nenjini zaziwa njengezinhlobo ezimbili ezahlukene zemishini yomshini. Enye iwukuguqula amanye amandla abe amandla kagesi ukuze kukhiqizwe ugesi, kuyilapho injini iguqula amandla kagesi abe amandla omshini ukuze kudonswe ezinye izinto. Kodwa-ke, lokhu okubili akukwazi ukufakwa nokushintshwa. Ezinye izinhlobo zamajenereyitha nama-motor zingashintshwa ngemva kokuklama nokuguqulwa. Kodwa-ke, uma kwenzeka iphutha, ijenereyitha nayo iguqulwa ibe ukusebenza kwenjini, okuyisivikelo esibuyela emuva ngaphansi kwamandla abuyela emuva ejenereyitha esifuna ukukhuluma ngawo namuhla.
Kuyini amandla abuyela emuva?
Njengoba sonke sazi, indlela yamandla kagesi kufanele igeleze isuka endleleni yejenereyitha iye endleleni yesistimu. Kodwa-ke, ngesizathu esithile, lapho i-turbine ilahlekelwa amandla okunyakaza futhi iswishi yokukhipha amandla kagesi yehluleka ukukhubeka, indlela yamandla iyashintsha isuka ohlelweni iye kujenereyitha, okungukuthi, ijenereyitha ishintshela kumotha osebenzayo. Ngalesi sikhathi, ijenereyitha imunca amandla asebenzayo ohlelweni, okubizwa ngokuthi amandla abuyela emuva.
Ukulimala kwamandla abuyela emuva
Ukuvikelwa kwamandla okubuyela emuva kwejeneretha ukuthi lapho i-valve eyinhloko ye-throttle ye-turbine yomusi ivaliwe ngenxa yesizathu esithile futhi amandla okuqala elahlekile, ijeneretha iphenduka ibe yinjini yokushayela i-turbine yomusi ukuze ijikeleze. Ukujikeleza okusheshayo kwe-blade ye-turbine yomusi ngaphandle komusi kuzobangela ukungqubuzana kokuqhuma, ikakhulukazi e-blade yesigaba sokugcina, kungabangela ukushisa ngokweqile futhi kuholele engozini yomonakalo we-blade ye-rotor.
Ngakho-ke, ukuvikelwa kwamandla angemuva empeleni kuwukuvikelwa kwe-turbine yomusi ngaphandle kokusebenza komusi.
Ukuvikelwa kwamandla okubuyela emuva okuhleliwe kwejeneretha
Uhlelo lwejeneretha lokuvikela amandla abuyela emuva luhloselwe ukuvimbela ijeneretha ukuthi ingakhubeki ngokuzumayo iswishi yokukhipha ijeneretha ngaphansi komthwalo othile futhi ivalvu eyinhloko ye-throttle ye-turbine yomusi ayivaliwe ngokuphelele. Kulesi simo, iyunithi yejeneretha ye-turbine yomusi ithambekele ekusheshiseni ngokweqile ngisho nasekusheshiseni. Ukuze kugwenywe lesi simo, kwezinye izivikelo ngaphandle kwephutha le-short-circuit, ngemva kokuthunyelwa kwesignali yesenzo, izoqala isebenze ekuvaleni ivalvu eyinhloko ye-turbine yomusi. Ngemva kokusebenza kwamandla abuyela emuva * * * ejeneretha, izokwakheka futhi ivalvu enesignali evala ivalvu eyinhloko ye-steam, yakhe uhlelo lokuvikela amandla abuyela emuva ngemva kwesikhathi esifushane, futhi isenzo sizosebenza ngokuma okuphelele.
Umehluko phakathi kokuvikelwa kwamandla abuyela emuva kanye nokuvikelwa kwamandla abuyela emuva kohlelo
Ukuvikelwa kwamandla abuyela emuva kuwukuvimbela ijeneretha ukuthi ingaguquki ibe yinjini ngemuva kwamandla abuyela emuva, iqhube i-turbine yomusi ukuze ijikeleze futhi ibangele umonakalo ku-turbine yomusi. Ekugcineni, ngiyesaba ukuthi i-prime mover izoqhutshwa uhlelo uma ingenawo amandla!
Uhlelo lokuvikela amandla abuyela emuva luwukuvimbela isivinini esikhulu se-turbine esibangelwa yi-valve ye-throttle eyinhloko engavaliwe ngokuphelele ngemva kokuba iyunithi yejeneretha inqanyuliwe ngokuzumayo, ngakho-ke amandla abuyela emuva asetshenziselwa ukugwema. Ekuhlaziyeni kokugcina, ngiyesaba ukuthi amandla amaningi kakhulu e-prime mover azoholela esivinini esikhulu seyunithi.
Ngakho-ke, uma sikhuluma iqiniso, ukuvikelwa kwamandla angemuva kuwuhlobo lokuvikelwa kokudluliselwa kwejenereyitha, kodwa ikakhulukazi kuvikela i-turbine yomusi. Ukuvikelwa kwamandla angemuva kohlelo akusivikelo, kodwa inqubo yesenzo esethelwe ukukhubeka kohlelo, okwaziwa nangokuthi ukukhubeka kohlelo, okusetshenziswa kakhulu kwimodi yokuvala.
Isihluthulelo ukuthi uma nje amandla abuyela emuva efika enanini elibekiwe, azokhubeka. Ngaphezu kokufinyelela enanini elibekiwe, amandla abuyela emuva ohlelo adinga futhi ivalvu enkulu ye-throttle ye-turbine yesitimu ukuthi ivalwe. Ngakho-ke, isenzo samandla abuyela emuva kumele sigwenywe ngesikhathi sokuxhumeka kwegridi ngesikhathi sokuqalisa kweyunithi.
Lena imisebenzi yokuvikela ijenereyitha emuva kanye nencazelo yamandla okuguqula ijenereyitha. Kujenereyitha ye-turbine yomusi ekusebenzeni okuxhunywe kugridi, izosebenza njengemoto ehambisanayo ngemva kokuba i-valve enkulu ye-throttle ye-turbine yomusi ivaliwe: imunce amandla asebenzayo bese ihudula i-turbine yomusi ukuze ijikeleze, okungathumela amandla asebenzayo ohlelweni. Njengoba i-valve enkulu ye-throttle ye-turbine yomusi ivaliwe, i-blade yomsila ye-turbine yomusi inomshudulwano ne-residual steam ukuze kwakheke ukulahlekelwa ukuqhuma, okulinyazwa ukushisa ngokweqile ngesikhathi sokusebenza isikhathi eside. Ngalesi sikhathi, ukuvikelwa okuphambene kungavikela i-turbine yomusi ekulimaleni.
Isikhathi sokuthunyelwe: Jan-10-2022
