Umklamo Nokuthuthukiswa Kwe-Turbine Yezitshalo Zamandla Ezisebenzisa Ukushisa Komhlaba
Izitshalo zamandla ezisebenzisa i-geothermal ziyinsika ebalulekile yokuguquka kwamandla ngoba zingahlinzeka ngogesi ozinzile (umthwalo wesisekelo) ngokukhishwa okuphansi. Ngemuva kokuthembeka kwezitshalo zamandla ezisebenzisa i-geothermal kunendawo ebalulekile enquma ukuthi angakanani amandla e-geothermal angaguqulwa ngempumelelo abe ugesi: i-turbine. Ngokungafani nama-turbine omusi ezitshalweni zamandla ezisebenzisa i-thermal evamile, ama-turbine asebenzisa i-geothermal ahlangana noketshezi olusebenzayo oluhlukile: luvame ukuqukatha ingxube ye-steam namanzi, luqukethe amagesi angavundi, futhi luthwala izinto ezincibilikisiwe ezingabangela ukugqwala, ukuguguleka, kanye nokufakwa (ukukhula). Ngakho-ke, ukwakheka nokuthuthukiswa kwama-turbine asebenzisa i-geothermal kudinga indlela ehlukahlukene ehlanganisa i-thermodynamics, i-fluid dynamics, izinto zokwakha, ukukhiqiza, kanye namasu okusebenza.
Izici Zezinsizakusebenza Zokushisa Komhlaba kanye Nomthelela Wazo Kuma-Turbine
Izinsizakusebenza ze-Geothermal ziyahlukahluka ngokwezinga lokushisa kanye nezimo zamachibi. Ama-reservoir ashisa kakhulu (>200°C) avame ukukhiqiza umusi owomile noma uketshezi olugcwele umhwamuko ngemva kokuhlukaniswa, kuyilapho amazinga okushisa aphakathi nendawo (150–200°C) evame ukukhiqiza ingxube yezigaba ezimbili (umhwamuko-amanzi). Ukuba khona kwamanzi aketshezi, amaconsi, kanye nezinhlayiya eziqinile kwandisa ingozi yokuguguleka kwama-blade e-turbine. Ngaphezu kwalokho, uketshezi lwe-geothermal lungaqukatha i-H₂S, i-CO₂, i-chloride, i-silica, ne-boron, okungabangela ukugqwala kanye nokukhula kwezingxenye ze-turbine kanye nezinhlelo zazo ezisekelayo.
Ukwehluka kokwakheka koketshezi kanye nezimo nakho kuthinta ukukhethwa kokucushwa kwesitshalo: umusi owomile, umusi okhanyayo (ukukhanya okukodwa/okuphindwe kabili), noma umjikelezo we-binary (i-ORC/i-Kalina). Ukucushwa ngakunye kudinga uhlobo oluhlukile lwe-turbine kanye namasu athile okuklama okucindezela kokungena, ikhwalithi yomusi, izinga lokugeleza kwesisindo, kanye nezinhloso zokusebenza kahle.
Izinhlobo ze-Turbine Ezitshalweni Zamandla Ezisebenzisa Ugesi
1. I-turbine yomusi yomusi owomile
Isetshenziswa lapho umthombo ukhiqiza umusi owomile. Izinzuzo zawo zifaka phakathi uhlelo olulula kanye nokusebenza kahle okuphezulu. Izinselele ezinkulu ukulawula ukugqwala (isb., ngenxa ye-H₂S) kanye nokuphathwa kwegesi engavundi.
2. I-turbine yomusi yomusi we-flash
Okuvame kakhulu emasimini e-geothermal. Uketshezi lwe-geothermal luhlukaniswa kusihlukanisi; umusi ushayela i-turbine. Ngokuphazima kabili, umusi ovela kokubili ekucindezelekeni okuphezulu nokuphansi ungasetshenziswa ukwandisa umkhiqizo. Izinselele zokuklama ziyanda ngenxa yokwehluka komthwalo, ikhwalithi yomusi engaphansi kwefanele, kanye nethuba lokudlula kwamaconsi avela kusihlukanisi.
3. I-Turbine kumjikelezo we-binary (ORC/Kalina)
Kumazinga okushisa aphakathi nendawo noma lapho ukuhwamuka okuqondile kwe-brine kungenzeki. I-turbine isebenza ngoketshezi lwezinto eziphilayo (isb., i-isobutane, i-pentane) noma izingxube zamanzi e-ammonia. Umklamo ufana kakhulu ne-turbine yomjikelezo we-Rankine wezinto eziphilayo, kodwa usadinga ukunakwa ekuphepheni, ekuvaleni, nasekuhambisaneni kwezinto.
Izimiso Zokuklama ze-Aerodynamic kanye Nezigaba Ze-Turbine
Ukwakheka kwe-turbine kuqala ngokukhethwa kohlelo: i-impulse, i-reaction, noma ihlanganisiwe. Ama-geothermal turbine avame ukusebenzisa ukucushwa kwezigaba eziningi ukukhipha kancane kancane amandla kusuka kumusi ocindezelwe kakhulu aye ku-condenser pressure. Amapharamitha abalulekile acatshangelwe afaka:
– Isilinganiso sokucindezela kanye nokwehla kwe-enthalpy: kunquma inani lezigaba kanye nosayizi wama-blades.
– Isivinini esithile: siqondisa ukukhethwa kohlobo lwe-turbine (i-axial vs i-radial) kanye ne-geometry yesiteji.
– Ikhwalithi yomusi kanye nengxenye yobumanzi: lapho umusi umanzi kakhulu esigabeni sokugcina, kulapho ingozi yokuguguleka komhlabathi iba nkulu khona kanye nokusebenza kahle okuncishisiwe ngenxa yokulahlekelwa.
Intuthuko yanamuhla ithembele kakhulu ekulingiseni kwe-CFD (Computational Fluid Dynamics) ukuze kuthuthukiswe amaphrofayili ama-blade, ama-engeli okungena/okuphuma, futhi kuncishiswe ukulahlekelwa okubangelwa ukuhlukaniswa kokugeleza kanye nokuxokozela. Ngaphezu kwalokho, ukuhlaziywa kwe-3D kuvumela abaklami ukunciphisa ukulahlekelwa kokugeleza kwesibili eziqongweni zama-blade nasezindaweni ze-hub, okuvame ukuba yinto ebalulekile kuma-turbine amakhulu.
Izinselele Ezikhethekile: Ukuguguleka Kwenhlabathi, Ukugqwala, kanye Nokukhula Komhlabathi
Ama-turbine e-geothermal abhekene “nezitha” ezintathu eziyinhloko ezihlobene:
1. Ukuguguleka komhlabathi okubangelwa amaconsi nezinhlayiya
Uma umfutho uphansi, umusi uvame ukujiya ube amaconsi amanzi. Amaconsi anejubane eliphezulu angaguguda unqenqema oluphambili lwama-blade. Umklamo wokunciphisa umthelela uhlanganisa ukusetshenziswa kwemisele yokukhipha amanzi, ukulawula izinga lokushisa le-condenser, kanye nokukhethwa kwezinto nezinto zokumboza ezingaguguleki.
2. Ukugqwala kwamakhemikhali
I-H₂S, i-CO₂, kanye ne-chloride kungabangela ukugqwala kwemigodi kanye nokuqhekeka kokugqwala okucindezelekile. Ngakho-ke, ukukhetha izinto (isb., izinsimbi ezithile ze-alloy, izinsimbi ezingagqwali, noma izinto ezivikela ubuso) kubalulekile. Umklamo kumele futhi ucabangele izindawo ezisengozini njengempande ye-disc-blade, amabhawodi, kanye nokuvalwa.
3. Ukukhulisa/ukusika inhlabathi
I-Silica kanye namanye amaminerali angafakwa kuma-nozzles, ama-blades, noma izindlela zokugeleza, okushintsha i-geometry nokunciphisa ukusebenza kahle. Amasu okulawula ngokuvamile ahilela ukulungiswa kwamanzi ahlanzekile, ukulawulwa kwamakhemikhali, ukwakheka okufanele kokuhlukanisa, kanye nezinqubo zokuhlanza njalo.
Izinto Zokusebenza, Ukukhiqiza, kanye Nobuchwepheshe Bokumboza
Ukukhethwa kwezinto ze-geothermal turbine akugxili nje kuphela emandleni omshini kodwa futhi nasekumelaneni namakhemikhali. Kuma-rotor nama-blade, inhlanganisela yokuqina, ukumelana nokukhathala, kanye nokumelana nokugqwala kubalulekile. Empeleni, abakhiqizi bangenza lokhu:
– Insimbi engagqwali noma insimbi exubile enokwelashwa okukhethekile kwezingxenye ezithintana ngqo nomusi.
– Ukwemboza okulwa nokuguguleka/ukugqwala esigabeni sokugcina se-blade.
– Ukuqina komphezulu ezindaweni ezibhekene nokuvinjwa kwamaconsi.
Ngokombono wokukhiqiza, ukunemba kwe-geometry yama-blade kunquma ukusebenza kahle. Ukushintshwa kwe-CNC okune-axis engu-5, ukuhlolwa kwe-CMM, kanye nokulinganisa kwe-rotor ngesivinini esikhulu kuyizinto ezijwayelekile. Kwezinye intuthuko, ukukhiqizwa kwezengezo kuyahlolwa ngezingxenye eziyinkimbinkimbi, yize ukusetshenziswa kwayo ezingxenyeni ezijikelezayo ezibalulekile kusadinga ukuqinisekiswa okuqinile.
Ukuhlanganiswa Kwesistimu: I-Condenser, i-NCG, kanye Nokulawula Ukusebenza
Ama-turbine awazona izingxenye ezizimele. Ukusebenza kahle kwe-turbine kuthonywa kakhulu yingcindezi yokukhipha umoya ekhishwa yi-condenser. Ezitshalweni zamandla ezisebenzisa i-geothermal, amagesi angavundisi umoya (ama-NCG) njenge-CO₂ angandisa ingcindezi ye-condenser uma uhlelo lokukhipha igesi lunganele—umphumela oqondile onciphisa amandla e-turbine. Ngakho-ke, ukwakheka kwe-turbine kumele kuhlanganiswe nalokhu:
– Uhlelo lwe-Condenser (ukuthintana ngqo noma i-condenser engaphezulu)
– Uhlelo lokususa i-vacuum kanye negesi (i-ejector yomusi, iphampu ye-vacuum yendandatho yoketshezi, noma inhlanganisela)
- Ukulawulwa kwevalvu eyinhloko kanye nomphathi wokuqina kwemvamisa kanye nokulawulwa komthwalo
– Ukuvikelwa ekungenisweni kwamanzi ukuze uketshezi lungangeni ku-turbine ngesikhathi sokuguquguquka
Intuthuko yakamuva igcizelela futhi ukusetshenziswa kwezinsimbi zedijithali zokuqapha ukudlidliza, izinga lokushisa lamabhere, ingcindezi, kanye nokusebenza kahle. Ngemininingwane yomlando, opharetha bangafaka ukulungiswa kokubikezela ukuze banciphise isikhathi sokungasebenzi.
Umklamo Wokuthembeka: Ukudlidliza, Amabheringi, kanye Nokuvala
Ama-turbine asebenza ngesivinini esikhulu sokujikeleza futhi ahlangabezana nemithwalo yokushisa neyemishini ejikelezayo. Ukuhlaziywa kwe-rotordynamic kuyadingeka ukuqinisekisa ukuthi ama-resonance ayingozi awenzeki ngaphakathi kwebanga lokusebenza. Ama-bearings (ama-journal nama-thrust bearings) kumele akwazi ukusingatha imithwalo ye-axial ngenxa yokwehluka kwengcindezi ngenkathi egcina ukuzinza kwe-rotor.
Ukuvala kubalulekile futhi ngoba ukuvuza komusi kunciphisa ukusebenza kahle futhi kungangenisa ukungcola. Izivalo ze-Labyrinth zisetshenziswa kabanzi, kodwa ukwakheka kwazo kudinga ukulungiswa ukuqinisekisa ukuthi azinawo ama-deposit futhi azigugi.
Isiqondiso Sokuthuthukiswa Kwe-Geothermal Turbine
Ukusungulwa kwe-geothermal turbine kuhamba ngemigqa eminingana ebalulekile. Okokuqala, ukuthuthukiswa kokusebenza kahle ngokusebenzisa ukulungiswa kwe-aerodynamic kwe-3D, ukuthuthukiswa kwesigaba sokugcina, kanye nokunciphisa ukulahlekelwa kwangaphakathi. Okwesibili, ukuthuthukiswa kokuqina kwezinto ezintsha, izembozo eziqinile, kanye nemiklamo ebekezelela kakhulu umusi omanzi. Okwesithathu, ukwenziwa kwedijithali kokusebenza ngezinzwa zesikhathi sangempela, ukuhlaziywa kokusebenza, kanye nezinhlelo zokulawula ezivumelana nezimo zemithombo ehlukahlukene.
Ngaphezu kwalokho, ukuthambekela kokusebenzisa imithombo yokushisa okuphakathi kuqhuba ukuthuthukiswa kwama-turbine e-ORC amancane futhi asebenza kahle. Ngakolunye uhlangothi, imiqondo ye-geothermal ehlanganisiwe—isibonelo, ukuhlanganiswa nezinhlelo zokushisa kwemfucuza yezimboni noma zokugcina ukushisa—kuvula isidingo sama-turbine aguquguqukayo ukulayisha ukushintshashintsha.
I-Penutup
Ukwakhiwa nokuthuthukiswa kwama-turbine ezitshalweni zamandla ezisebenzisa i-geothermal kuyinqubo eyinkimbinkimbi, elinganisela ukusebenza kahle kwamandla, ukumelana nezimo zoketshezi ezigqwalayo nezigugulekayo, kanye nokuthembeka kokusebenza kwesikhathi eside. Impumelelo ye-geothermal turbine ayinqunywa nje kuphela ngesimo se-blade noma inani lezigaba, kodwa futhi nokuhlanganiswa kohlelo lokuhlukanisa, i-condenser, ukulawulwa kwe-NCG, isu lezinto zokwakha, kanye nokuphathwa kokusebenza. Ngokuthuthuka kwe-CFD, ubuchwepheshe bezinto zokwakha, kanye nokuqapha kwedijithali, ama-geothermal turbine ayaqhubeka nokuguquka abe ngcono, aqine, futhi angabizi kakhulu—okusekela indima ye-geothermal njengomthombo kagesi othembekile nohlanzekile esikhathini esizayo.
