Liquid hydrogen hian dahkhawmna leh phurh chhuahna kawngah hlawkna engemaw zat a nei a. Hydrogen nena khaikhin chuan liquid hydrogen (LH2) hian density a nei sang zawk a, dahkhawmna atan pressure hniam zawk a mamawh a ni. Mahse, hydrogen hi liquid a nih theih nan -253°C a nih a ngai a, chu chu a harsa khawp mai tihna a ni. Temperature hniam lutuk leh kang thei hlauhawmna hian liquid hydrogen chu medium hlauhawm takah a siam a ni. Hemi avang hian, a kaihhnawih atana valve design-naah hian himna dan khauh tak leh rintlakna sang tak neih hi thil tih tur awm lo a ni.
Fadila Khelfaoui, Frédéric Blanquet-a ziah a ni
Velan valve (Velan) a ni.
Liquid hydrogen (LH2) hman dan.
Tunah hian liquid hydrogen hi hman a ni a, hun bik hrang hrangah hman tum a ni. Aerospace-ah chuan rocket launch fuel atan hman theih a ni a, transonic wind tunnel-ah pawh shock wave a siam thei bawk. “Science lian tak”-in a thlawp a, liquid hydrogen chu superconducting system, particle accelerator, leh nuclear fusion device-a thil pawimawh tak a lo ni ta a ni. Mite’n hmasawnna nghet neih an duhna a pun zel avangin tun hnaiah truck leh lawng tam zawkin liquid hydrogen chu fuel atan an hmang ta a ni. A chunga kan sawi tak application scenario-ah hian valve pawimawhzia a lang chiang hle. Valve him leh rintlak taka hnathawh hi liquid hydrogen supply chain ecosystem (production, transportation, storage and distribution)-a thil pawimawh tak a ni. Liquid hydrogen nena inzawm hnathawh hi a harsa hle. Kum 30 chuang zet -272°C thlenga high-performance valve siamna lama practical experience leh expertise nei tawh Velan hian hun rei tak chhung chu project thar hrang hrangah a inrawlh tawh a, liquid hydrogen service-a technical challenges te chu a chakna hmangin a hneh tih a chiang hle.
Design phase-a harsatna awmte
Valve design risk assessment-ah hian pressure, temperature leh hydrogen concentration te hi thil pawimawh tak tak an zirchiang vek a ni. Valve performance tihchangtlun nan design leh material thlan hian thutlukna pawimawh tak a chang a ni. Liquid hydrogen hmanna atana hman valve te hian harsatna dang an tawk a, chung zingah chuan hydrogen hian metal-a nghawng tha lo a neih dan pawh a tel. Temperature hniam takah chuan valve material-te hian hydrogen molecule-te beihna chu a tuar mai bakah (a kaihhnawih chhiatna mechanism thenkhat chu zirna lamah pawh sawisel a la ni reng a), an dam chhungin hun rei tak chhung chu hnathawh dan pangngaia an awm reng a ngai bawk. Tuna technology lama hmasawnna level thlir chuan industry hian hydrogen hmanna atana non-metallic material hman theih dan tur hriatna a nei tlem hle. Sealing material thlan dawnin he thil hi ngaihtuah tel a ngai a ni. Sealing tha tak hi design performance criterion pawimawh tak a ni bawk. Liquid hydrogen leh ambient temperature (room temperature) inkarah hian temperature danglamna 300°C vel a awm a, chu chuan temperature gradient a siam a ni. Valve component tin hian thermal expansion leh contraction degree hrang hrang an tawk ang. Hetianga inthlauhna hian critical sealing surface-a leakage hlauhawm tak a thlen thei a ni. Valve stem sealing tightness pawh hi design-ah hian a langsar ber a ni. Khaw lum atanga lum a inthlak hian heat flow a siam thin. Bonnet cavity area-a hmun lum tak takte chu a freeze thei a, hei hian stem sealing performance a tibuai thei a, valve operability a nghawng thei bawk. Chu bakah, temperature hniam tak tak -253°C a nih avangin valve hian he temperature-ah hian liquid hydrogen a vawng reng thei a, chutih rualin boiling avanga hloh tur a tlem thei ang bera a awm theih nan insulation technology tha ber a mamawh tihna a ni. Liquid hydrogen-a lumna transfer a awm chhung chuan a vawt ang a, a leak ang. Chu mai pawh ni lovin insulation breaking point-ah oxygen condensation a awm thin. Oxygen chu hydrogen emaw, kang thei thil dang emaw nena a inzawm chuan kangmei chhuah theihna a sang chho zel a ni. Chuvangin, valve-te’n kangmei hlauhawm an tawh theih dan ngaihtuah chuan, valve-te chu puak thei lo thil ngaihtuah chungin design a ngai a, chubakah kangmei laka inven thei actuator, instrumentation leh cable te pawh ngaihtuah tel a ngai a, chung zawng zawng chu certification khauh ber nen a ni. Hei hian kangmei a chhuah chuan valve chu a thawk tha thei tih a tichiang a ni. Pressure sang pawh hi valve te hnathawh theih lohna tur hlauhawm tak a ni bawk. Liquid hydrogen chu valve body cavity-ah a tang a, heat transfer leh liquid hydrogen evaporation a ruala a awm chuan pressure a tisang ang. Pressure danglamna lian tak a awm chuan cavitation (cavitation)/noise a awm thin. Heng thil thlengte hian valve service life a tawp hma thei a, process defect vang pawhin hlohna nasa tak a tawk thei bawk. Operating condition bik eng pawh ni se, a chunga thil awmte hi a taka ngaihtuah theih a nih a, design process-ah a kaihhnawih countermeasures lak theih a nih chuan valve chu him leh rintlak taka hnathawh theihna tur a ni. Hei bakah hian environment chungchangah design lama harsatna a awm a, chu chu fugitive leakage te pawh a ni. Hydrogen hi a danglam bik a: molecule te tak te, rawng nei lo, rim nei lo leh puak thei a ni. Heng characteristics te hian zero leakage a tulna tak tak chu a hril a ni.
North Las Vegas chhim lam tuipui kama Hydrogen Liquefaction station-ah chuan,
Wieland Valve engineer te hian technical service an pe mek a ni
Valve solutions te pawh a awm
Hnathawh leh chi bik eng pawh ni se, liquid hydrogen hmanna zawng zawng atana valve te hian thil tul tlangpui thenkhat an tlin a ngai a ni. Heng thil mamawh te hi: structural part-a material chuan structural integrity chu temperature hniam tak takah a awm reng theih nan a enkawl tur a ni Material zawng zawng hian natural fire safety property a nei vek tur a ni. Chutiang bawkin liquid hydrogen valve-te sealing element leh packing pawh hian a chunga kan sawi tak thil tul bulpui te hi a tlin a ngai a ni. Austenitic stainless steel hi liquid hydrogen valve siamna atana hmanraw tha tak a ni. Impact strength tha tak a nei a, heat loss a nei tlem hle a, temperature gradient lian tak tak pawh a tuar thei bawk. Material dang pawh liquid hydrogen condition atana tha tak tak, mahse specific process condition-a tihkhawtlai te pawh a awm bawk. Material thlan bakah hian design details thenkhat chu ngaihthah tur a ni lo, chu chu valve stem tihzauh leh air column hmanga sealing packing chu temperature hniam lutuk atanga venhimna te hi a ni. Tin, valve stem extension-ah hian condensation awm loh nan insulation ring dah theih a ni bawk. Application condition bik anga valve design hian technical challenge hrang hrangah solution dik zawk pek a pui thin. Vellan hian butterfly valve hi design hrang hrang pahnih a pe a, chungte chu double eccentric leh triple eccentric metal seat butterfly valve te an ni. Design pahnih hian bidirectional flow capability an nei vek a ni. Disc shape leh rotation trajectory design hian tight seal a siam thei a ni. Valve body ah hian residual medium awm lohna hmunah cavity a awm lo. Velan double eccentric butterfly valve chungchangah chuan disc eccentric rotation design a hmang a, VELFLEX sealing system danglam tak nen a inzawm a, valve sealing performance tha tak a nei thei a ni. He patented design hian valve chhunga temperature inthlak danglamna lian tak pawh a tuar thei a ni. TORQSEAL triple eccentric disc hian a bik taka siam rotation trajectory a nei bawk a, hei hian disc sealing surface hian closed valve position a thlen veleh seat chauh a khawih a, a scratch loh nan a pui a ni. Chuvangin, valve closing torque chuan disc chu compliant seating neih theih nan a khalh thei a, closed valve position-ah wedge effect tling tak a siam thei a, chutih rualin disc chu seat sealing surface circumference zawng zawng nen inang tlangin a inzawm tir thei bawk. Valve seat zawm dan hian valve body leh disc te chu “self-adjusting” function an nei thei a, chu chuan temperature inthlak danglam laiin disc chu seizure a veng thei a ni. Reinforced stainless steel valve shaft hian operating cycle sang tak a nei thei a, temperature hniam takah pawh a thawk tha hle. VELFLEX double eccentric design hmang hian valve hi online-ah rang tak leh awlsam takin service theih a ni. Side housing vang hian seat leh disc chu direct-a enfiah emaw service emaw theih a ni a, actuator emaw, hmanraw bik emaw pawh tihchhiat a ngai lo.
Tianjin Tanggu Tui-Seal Valve Co.,ltdtechnology hmasawn tak tak resilient seated valve te an thlawp a, resilient seated te pawh an thlawp bawkwafer hnim hring valve a ni, Lug butterfly valve a ni, A rilru a buai em em a, a rilru a hah em em bawk a, A rilru a buai em em a, a rilru a hah em em bawk a. , Double flange eccentric butterfly valve, .Y-strainer hmanga siam a ni, balancing valve, .Wafer dual plate check valve a awm bawk, adangte.
Post hun chhung: Aug-11-2023
