Ina iti iho i te 0°C te pāmahana mimiti o te pūnaha whakamatao rokiroki makariri, ka puta he paparanga hukapapa ki te mata o te mīhini mimiti, ka pā ki te pai o te whakawhiti wera. Nō reira, he mea nui anō hoki te whakarewa hukapapa auau i roto i te tiaki rokiroki makariri. He maha ngā huarahi hei whakarewa. I tēnei wā, e rima ngā tikanga matua e whakamahia ana e ngā kaihanga hanga rokiroki makariri: te whakarewa hukapapa horihori, te whakarewa hiko, te whakarewa hau wera, te whakarewa wai, te whakarewa wai hau wera.
1. Ko te whakarewa ā-ringa he tango ā-ringa i te paparanga hukapapa i runga i te mata o te ngongo tukunga whakapūhau. Ka taea te whakahaere i tēnei tikanga me te kore e whakamutu i te taputapu whakamatao. He roa te wā, he uaua hoki tēnei tikanga, ā, he ngoikore te pānga whakarewa.
2. Ko te whakarewa hiko he tāuta i tētahi whakamahana hiko ki runga i te mīhini whakamahana hei whakarewa mā te whakamahana hiko. I te wā e whakarewa ana, katihia te pūwero, kati rānei te whāngai wai ki te mīhini whakamahana. He iti te utu me te ngāwari o te whakahaere i ngā painga o te whakarewa hiko, engari he nui te utu whakahaere. Ko te tikanga he whakarewa i ngā taputapu rokiroki makariri, ehara i te whakarewa i ngā taputapu pouaka whakamātao. Mō ngā pāmahana rerekē, me rerekē ngā whakaritenga mō ngā pūkenga whakamahana, me rerekē hoki te kaha whakamatao e hiahiatia ana. Me whakarite te whakatūnga o te rokiroki makariri kia rite ki te taiao tono me te tono tūturu a te kiritaki, ki te kore he take motuhake ki te tango i te ara o te paerewa.
3. Ko te whakarewa hau wera ko te whakamahinga o te mamaoa hau whakamatao wera rawa e tukuna ana e te pūwero hei tuku i te wera i roto i te pūwero me te whakarewa i te paparanga hukapapa i runga i te mata o te pūwero. He uaua te pūnaha whakarewa hau wera, ā, he nui te utu. Engari he pai ake te pānga whakarewa. Ina whakamahia i roto i te pūnaha haukini, ka taea hoki te tuku i te hinu kua kohia i roto i te pūwero ki roto i te waikeri, ki te puna tohanga pēhanga iti rānei. I roto i te tukanga whakarewa hau wera, ka whakahaerehia te pēhanga i te 0.6MPa. Whakamātauria te whakamahi i te hau pēhanga teitei e tukuna ana mai i te pūwero kotahi-wāhanga hei whakarewa. He pai pea i te takurua te whakaiti i te wai whakamatao, te whakaiti rānei i te maha o ngā pūwero, te whakanui ake i te pāmahana putanga, te whakapoto i te wā whakarewa. Mō ngā pūnaha haukini, me hono te haukini wera hei whakarewa ki te paipa putanga o te wehewehe hinu.
4. Ko te whakarewa wai he rehu wai ki runga i te mata o te mīhini whakapūkara mā te whakamahi i te taputapu pupuhi hei whakarewa i te paparanga hukapapa. He uaua te hanganga o te pūnaha whakarewa wai, he nui te utu, engari he pai te pānga, he iti hoki te utu. Ka taea anake e te whakarewa wai te tango i te paparanga hukapapa i te mata o waho o te mīhini whakapūkara, ā, kāore e taea te whakaoti i te pānga kino o te kohikohi hinu i roto i te mīhini whakapūkara ki te whakawhiti wera. Ko te mea nui ko te papa rokiroki makariri, e hangaia ana i mua e te kaihanga papa rokiroki makariri, ā, he roa, he whānui me te matotoru pumau. Ko te papa rokiroki makariri 100mm te matotoru e whakamahia ana mō te rokiroki makariri pāmahana teitei me te pāmahana waenga, ko te papa rokiroki makariri 120mm, 150mm rānei te matotoru e whakamahia ana mō te rokiroki pāmahana iti me te rokiroki tio.
5. Ko te whakarewa wai hau wera he tikanga e rua o te whakarewa wera me te whakarewa wai e whakamahia ana i te wā kotahi, e arotahi ana i ngā painga o ngā mea e rua, ā, ka taea te tango tere me te whai hua i te paparanga hukapapa i runga i te mata o te mīhini whakapūngao me te whakakore i te kohikohinga hinu i roto i te mīhini whakapūngao. I te wā e whakarewa ana, ka tukuna tuatahitia te hau wera ki roto i te mīhini whakapūngao hei wehe i te paparanga hukapapa mai i te mata o te mīhini whakapūngao, kātahi ka rehuhia te wai kia tere te horoi i te paparanga hukapapa. I muri i te tapahi i te puna wai, ka "whakamaroke" te mata o te mīhini whakapūngao e te hau wera hei ārai i te kiriata wai mata mai i te huka me te pā ki te whakawhiti wera. I mua, ko te polyethylene me te polystyrene te nuinga o ngā kaihanga papa rokiroki makariri hei rauemi. Ināianei he pai ake te mahi o te papa hanawiti polyurethane. He iti te matotoru o te rauemi whakamahana pahuka polystyrene, kāore e taea te whakamahana. He maha ngā wā ka whakamahia i roto i ngā taputapu motuhake. He rauemi mata pai te polyethylene. Mā te ōwehenga motuhake, ka taea te pahuka i te matotoru tika, he pai te pānga whakamahana, he kaha te kaha o te rauemi whakamahana. He pai ake te pereti polyurethane, he pai ake te mahi whakamarumaru, ā, kāore e mimiti i te makuku, engari he paku teitei ake te utu mō te rokiroki matao.
Wā tuku: Hakihea-08-2023