I ngā tau 30, ko ngātakirere pūrerehuai hangaia i Te Hononga o Amerika, i whakaurua ki Hapani i ngā tau 1950, ā, i whakamahia whānuitia i Hapani i ngā tau 1960, ā, i whakatairangahia i Haina i muri i ngā tau 1970. I tēnei wā, kua whakakapia haeretia ngā takirere kuaha e ngā takirere pūrerehua neke atu i te DN300 mm i te ao. Ki te whakatauritea kingā takirere kuaha, he poto te wā whakatuwheratanga me te wā kati o ngā takirere pūrerehua, he iti te taipana whakahaere, he iti te wāhi tāutanga, ā, he mama te taumaha. Hei tauira, ko te DN1000 te rahi, tata ki te 2T te rahi o te takirere pūrerehua, ā, tata ki te 3.5T te rahi o te takirere kuaha, ā, he ngāwari te whakakotahi i te takirere pūrerehua me ngā momo taputapu taraiwa, he roa te mau me te pono.
Te ngoikoretanga o te hiri rapatakirere pūrerehuaKo te take, ina whakamahia mō te whakawhāiti i te hau, ka puta te cavitation nā te whakamahinga hē, ka pakaru te nohoanga rapa. I ngā tau tata nei, kua whakawhanakehia hoki e Haina ngā takirere pūrerehua hiri-whakarewa, ā, i ngā tau tata nei, kua whakawhanakehia hoki e Hapani ngā takirere pūrerehua āhua-heru me te ātete cavitation, te wiri iti me te haruru iti.
Ko te roanga o te ora o te nohoanga hiri whānui he 15-20 tau mō te rapa, ā, 80-90 tau mō te konganuku i raro i ngā āhuatanga noa. Heoi, ko te whiriwhiri tika ka whakawhirinaki ki ngā whakaritenga o ngā āhuatanga mahi.
Ko te whanaungatanga i waenganui i te whakatuwheratanga o tētahitakirere pūrerehuaā, ko te tere rere he mea rārangi, he mea taurite hoki. Mēnā ka whakamahia hei whakahaere i te tere rere, he hononga tata hoki ōna āhuatanga rere ki te ātete rere o ngā paipa, pērā i te diameter me te āhua o ngā takirere kua tāutahia ki ngā paipa e rua, ā, he rerekē te tauwehenga mate o te paipa, ā, ka tino rerekē te tere rere o te takirere.
Mena kei roto te takirere i te āhua o te whakawhāiti nui, ka ngāwari te tuara o te pereti takirere ki te cavitation, ā, tera pea ka pakaru te takirere, nō reira ka whakamahia whānuitia i waho o te 15°.
Ina kei waenganui te takirere pūrerehua, ko te āhua o te whakatuwheratanga i hangaia e tetakirereKo te tinana me te pito o mua o te pereti pūrerehua kei waenganui i te kakau takirere, ā, he rerekē ngā āhua o ngā taha e rua, ko te pito o mua o te pereti pūrerehua i tetahi taha e neke ana i te ahunga o te wai e rere ana, ā, ko tetahi taha e neke ana ki te ahunga o te wai e rere ana, nō reira, ko te tinana takirere i tetahi taha me te pereti takirere e hanga ana i tētahi whakatuwheratanga āhua-pūwero, ā, ko tetahi taha he rite ki te whakatuwheratanga āhua-kōhao o te pūwero, he tere ake te taha o te pūwero i te taha o te pūwero, ā, ka puta te pēhanga kino i raro i te takirere taha o te pūwero, ā, he maha ngā wā ka taka te hiri rapa.
He rerekē te uara o te taipana whakahaere o te takirere pūrerehua nā te rerekētanga o te whakatuwheratanga me te ahunga whakatuwheratanga o te takirere, ā, mō te takirere pūrerehua whakapae, inā koa te takirere whānui, nā te hohonutanga o te wai, kāore e taea te wareware i te taipana i hangaia e te rerekētanga i waenga i te pane o runga me raro o te pou takirere. Hei tāpiri, ina tāutahia he tuke ki te taha tomokanga o te takirere, ka puta he rere whakapē, ā, ka piki ake te taipana. Ina kei waenganui te takirere, me raka-ake te pūnaha whakahaere nā te mahi a te taipana rere wai.
Wā tuku: 22 o Ākuhata-2024
