I-hydrogen engamanzi ineengenelo ezithile ekugcinweni nasekuthuthweni. Xa ithelekiswa ne-hydrogen, i-hydrogen engamanzi (LH2) inoxinano olukhulu kwaye ifuna uxinzelelo oluphantsi lokugcina. Nangona kunjalo, i-hydrogen kufuneka ibe yi--253°C ukuze ibe lulwelo, nto leyo ethetha ukuba kunzima kakhulu. Amaqondo obushushu aphantsi kakhulu kunye neengozi zokutsha kwenza i-hydrogen engamanzi ibe yindawo eyingozi. Ngenxa yesi sizathu, amanyathelo okhuseleko angqongqo kunye nokuthembeka okuphezulu ziimfuno ezingagungqiyo xa kuyilwa iivalvu zezicelo ezifanelekileyo.
NguFadila Khelfaoui, uFrédéric Blanquet
Ivalvu yeVelan (iVelan)
Ukusetyenziswa kwe-hydrogen engamanzi (LH2).
Okwangoku, i-hydrogen engamanzi isetyenziswa kwaye izanywa ukusetyenziswa kwiimeko ezahlukeneyo ezikhethekileyo. Kwi-aerospace, ingasetyenziswa njenge-rocket launch fuel kwaye inokwenza amaza okwethutyana kwii-transonic wind tunnels. Ixhaswa yi-"big science," i-hydrogen engamanzi ibe yinto ephambili kwiinkqubo ze-superconducting, i-particle accelerators, kunye nezixhobo ze-nuclear fusion. Njengoko umnqweno wabantu wophuhliso oluzinzileyo ukhula, i-hydrogen engamanzi isetyenziswa njenge-fuel ziilori ezininzi kunye neenqanawa kwiminyaka yakutshanje. Kwiimeko zesicelo ezingentla, ukubaluleka kwee-valve kucacile kakhulu. Ukusebenza ngokukhuselekileyo nangokuthembekileyo kwee-valve yinxalenye ebalulekileyo ye-liquid hydrogen supply chain ecosystem (imveliso, uthutho, ukugcinwa kunye nokusasazwa). Imisebenzi enxulumene ne-liquid hydrogen iyimingeni. Ngaphezulu kweminyaka engama-30 yamava asebenzayo kunye nobuchule kwicandelo lee-valve ezisebenzayo ukuya kuthi ga kwi--272°C, iVelan ibisoloko ibandakanyeka kwiiprojekthi ezahlukeneyo ezintsha ixesha elide, kwaye kuyacaca ukuba iphumelele imingeni yobugcisa yenkonzo ye-hydrogen engamanzi ngamandla ayo.
Imingeni kwisigaba soyilo
Uxinzelelo, ubushushu kunye noxinzelelo lwe-hydrogen zonke zizinto eziphambili ezihlolwayo kuvavanyo lomngcipheko woyilo lweevalvu. Ukuze kuphuculwe ukusebenza kweevalvu, uyilo kunye nokukhetha izinto zidlala indima ebalulekileyo. Iivalvu ezisetyenziswa kwizicelo ze-hydrogen ezingamanzi zijongene nemingeni eyongezelelweyo, kubandakanya nemiphumo emibi ye-hydrogen kwisinyithi. Kumaqondo obushushu aphantsi kakhulu, izixhobo zevalvu akufuneki zimelane nohlaselo lweemolekyuli ze-hydrogen kuphela (ezinye zeendlela zokuwohloka ezinxulumene nazo zisaxoxwa kwi-academia), kodwa kufuneka zigcine ukusebenza okuqhelekileyo ixesha elide kumjikelo wazo wobomi. Ngokwenqanaba langoku lophuhliso lobuchwepheshe, eli shishini linolwazi oluncinci malunga nokusetyenziswa kwezinto ezingezizo zesinyithi kwizicelo ze-hydrogen. Xa ukhetha izinto zokuvala, kuyimfuneko ukuqwalasela le nto. Ukuvala okusebenzayo kukwayindlela ebalulekileyo yokusebenza koyilo. Kukho umahluko wobushushu ophantse ube yi-300°C phakathi kwe-hydrogen engamanzi kunye nobushushu obuphakathi (ubushushu begumbi), okubangela i-gradient yobushushu. Icandelo ngalinye levalvu liya kudlula kumanqanaba ahlukeneyo okwandiswa kobushushu kunye nokucutheka. Oku kungangqinelani kunokukhokelela ekuvuzeni okuyingozi kwiindawo zokuvala ezibalulekileyo. Ukuqina kokuvala kwesiqu sevalvu kukwayinto ephambili yoyilo. Ukutshintsha ukusuka ebanda ukuya kushushu kudala ukuhamba kobushushu. Iindawo ezishushu zommandla we-bonnet cavity zinokubanda, nto leyo enokuphazamisa ukusebenza kwe-stem sealing kwaye ichaphazele ukusebenza kwevalvu. Ukongeza, ubushushu obuphantsi kakhulu be--253°C buthetha ukuba iteknoloji yokukhusela iyadingeka ukuqinisekisa ukuba ivalvu inokugcina i-hydrogen engamanzi kolu bushushu ngelixa inciphisa ilahleko ezibangelwa kukubila. Logama nje kukho ubushushu obudluliselwa kwi-hydrogen engamanzi, iya kuphuma kwaye ivuze. Ayipheleli apho, ukufuma kwe-oksijini kwenzeka kwindawo yokuqhekeka kwe-insulation. Nje ukuba ioksijini idibane ne-hydrogen okanye ezinye izinto ezivuthayo, umngcipheko womlilo uyanda. Ke ngoko, xa kujongwa umngcipheko womlilo iivalvu ezinokujongana nawo, iivalvu kufuneka zenziwe ngezinto ezingaqhumiyo engqondweni, kunye nee-actuators ezingatshiyo, izixhobo kunye neentambo, konke oku kuqinisekiswe ngokufanelekileyo. Oku kuqinisekisa ukuba ivalvu isebenza ngokufanelekileyo xa kutsha. Uxinzelelo olongezelelweyo lukwangumngcipheko onokubangela ukuba iivalvu zingasebenzi. Ukuba i-hydrogen engamanzi ibanjwe kwi-cavity yomzimba wevalvu kwaye ukudluliselwa kobushushu kunye nokuphuma kolwelo kwi-hydrogen kwenzeka ngaxeshanye, kuya kubangela ukwanda koxinzelelo. Ukuba kukho umahluko omkhulu kuxinzelelo, i-cavitation (cavitation)/ingxolo iyenzeka. Ezi zinto zinokukhokelela ekupheleni kwexesha lomsebenzi wevalvu, kwaye zide zilahlekelwe kakhulu ngenxa yeziphene zenkqubo. Nokuba zeziphi na iimeko zokusebenza, ukuba ezi zinto zingasentla zinokuqwalaselwa ngokupheleleyo kwaye amanyathelo okuchasana ahambelanayo anokuthathwa kwinkqubo yoyilo, inokuqinisekisa ukusebenza okukhuselekileyo nokuthembekileyo kwevalvu. Ukongeza, kukho imingeni yoyilo enxulumene nemiba yokusingqongileyo, njengokuvuza okubalekayo. I-hydrogen yahlukile: iimolekyuli ezincinci, azinambala, azinavumba, kwaye ziyaqhuma. Ezi mpawu zimisela imfuneko epheleleyo yokuba kungabikho kuvuza.
Kwisikhululo se-North Las Vegas West Coast Hydrogen Liquefaction,
Iinjineli zeWieland Valve zibonelela ngeenkonzo zobugcisa
Izisombululo zeValve
Nokuba yeyiphi na imisebenzi kunye nohlobo oluthile, iivalvu zazo zonke izicelo ze-hydrogen engamanzi kufuneka zihlangabezane neemfuno ezifanayo. Ezi mfuno ziquka: izinto zenxalenye yesakhiwo kufuneka ziqinisekise ukuba ukuqina kwesakhiwo kugcinwa kumaqondo obushushu aphantsi kakhulu; Zonke izinto kufuneka zibe neempawu zemvelo zokhuseleko lomlilo. Ngesizathu esifanayo, izinto zokutywina kunye nokupakishwa kweevalvu ze-hydrogen ezingamanzi kufuneka zihlangabezane neemfuno ezisisiseko ezikhankanyiweyo apha ngasentla. Intsimbi engagqwaliyo ye-Austenitic sisixhobo esifanelekileyo kwiivalvu ze-hydrogen ezingamanzi. Inamandla angcono kakhulu okuchaphazeleka, ilahleko encinci yobushushu, kwaye inokumelana nobushushu obukhulu. Kukho ezinye izinto ezifanelekileyo nakwiimeko ze-hydrogen ezingamanzi, kodwa zilinganiselwe kwiimeko ezithile zenkqubo. Ukongeza ekukhetheni izixhobo, ezinye iinkcukacha zoyilo akufuneki zijongwe, ezinje ngokwandisa isiqu sevalvu kunye nokusebenzisa ikholamu yomoya ukukhusela ukupakisha kokuvala kumaqondo obushushu aphantsi kakhulu. Ukongeza, ukwandiswa kwesiqu sevalvu kunokuxhotyiswa ngendandatho yokuthintela ukufuma ukuze kuthintelwe ukufuma. Ukuyila iivalvu ngokweemeko ezithile zesicelo kunceda ukunika izisombululo ezifanelekileyo ngakumbi kwimingeni eyahlukeneyo yobugcisa. I-Vellan inikezela ngeevalvu zebhabhathane kwiindlela ezimbini ezahlukeneyo: iivalvu zebhabhathane zesihlalo sesinyithi ezingaqhelekanga neziphindwe kathathu. Zombini ezi zakhiwo zinamandla okuhamba kabini. Ngokuyila imo yediski kunye nendlela yokujikeleza, kunokufumaneka isitywina esiqinileyo. Akukho mgodi emzimbeni wevalvu apho kungekho ndawo iseleyo. Kwimeko yevalvu yebhabhathane ephindwe kabini yeVelan, isebenzisa uyilo lokujikeleza olungaqhelekanga lwediski, kunye nenkqubo yokuvala iVELFLEX eyahlukileyo, ukuze kufezekiswe ukusebenza kakuhle kokuvala ivalvu. Olu yilo olunelungelo lobunikazi lunokumelana nokuguquguquka okukhulu kobushushu kwivalvu. Idiski ye-TORQSEAL ephindwe kathathu engaqhelekanga ikwanayo nendlela yokujikeleza eyenzelwe ngokukodwa enceda ukuqinisekisa ukuba umphezulu wokuvala idiski uchukumisa kuphela isihlalo ngexesha lokufikelela kwindawo yevalvu evaliweyo kwaye ayikrweli. Ke ngoko, i-torque yokuvala yevalvu ingaqhuba idiski ukuze ifikelele kwizihlalo ezihambelanayo, kwaye ivelise isiphumo esaneleyo se-wedge kwindawo yevalvu evaliweyo, ngelixa isenza idiski iqhagamshelane ngokulinganayo nomjikelezo wonke womphezulu wokuvala isihlalo. Ukuhambelana kwesihlalo sevalvu kuvumela umzimba wevalvu kunye nediski ukuba nomsebenzi "wokuzilungisa", ngaloo ndlela kuthintelwe ukubanjwa kwediski ngexesha lokutshintsha kobushushu. Ishaft yevalvu yentsimbi engagqwaliyo eqinisiweyo iyakwazi ukusebenza ngemijikelo ephezulu kwaye isebenza kakuhle kumaqondo obushushu aphantsi kakhulu. Uyilo lwe-VELFLEX oluphindwe kabini oluyi-eccentric luvumela ivalvu ukuba isetyenzwe kwi-intanethi ngokukhawuleza nangokulula. Ngenxa yendlu esecaleni, isihlalo kunye nediski zinokuhlolwa okanye zilungiswe ngokuthe ngqo, ngaphandle kwemfuneko yokuqhaqha i-actuator okanye izixhobo ezikhethekileyo.
Tianjin Tanggu Water-Seal Valve Co.,ltdzixhasa iivalvu zokuhlala eziqinileyo zobuchwepheshe obuphezulu, kuquka nezihlalo eziqinileyoivalvu yebhabhathane ye-wafer, Ivalvu yebhabhathane yeLug, Ivalvu yebhabhathane ejikelezileyo ephindwe kabini, Ivalvu yebhabhathane engaqhelekanga ephindwe kabini,Isihluzo se-Y, ivalvu yokulinganisela,Ivalvu yokujonga ipleyiti ezimbini yesonka esisicaba, njl. njl.
Ixesha lokuthumela: Agasti-11-2023
