Ko ngā kaupapa matua o te hoahoa RMS ko ngā mea e whai ake nei:
- Te tātaitanga me te hoahoa o te rahi o te raina paipa
- Te tatau me te hoahoa i te Pahu Whakakore/Te Wehewehe Tātari/Te Wehewehe Wai
- Te tātaitanga me te hoahoa i te rahi o te tātari hau maroke
- Te tātaitanga rahi WBH
- Te tātaitanga rahi o te Kaiwhakahaere, ngā Takirere Whakaora me te SSV
Ngā kupu taketake
I mua i te kōrero mō te hoahoa o te RMS, me kōrero tātou mō ngā kupu e whai ake nei:
- Te Pēhanga Ine me te Pēhanga Tino
- Rōrahi Paerewa me te Rōrahi Tūturu
Ka inehia te pēhanga tino tika e pā ana ki te kore tino tika. Ko ngā tataunga katoa e pā ana ki ngā ture hau me whakamahi te pēhanga (me te pāmahana) i roto i ngā wae tino tika.
Ko te pēhanga hauātea he pēhanga i roto i te hau e karapoti ana i te mata o te whenua – i te tata rānei ki – te mata o te whenua. Ko te pēhanga hauātea e whakawhirinaki ana ki te pāmahana me te teitei i runga ake i te taumata o te moana. Ko te Pēhanga Hauātea Paerewa he 14.696 Psi (1.01325 pae).
He maha ngā wā ka whakamahia he ine hei ine i te rerekētanga pēhanga i waenga i tētahi pūnaha me te āhuarangi e karapoti ana. E kiia ana tēnei pēhanga ko te pēhanga ine, ā, ka taea te whakaatu penei:
Pg = Pa – Po
Kei hea:
Pg = Pēhanga Ine Pa = Pēhanga Tino
Po = Pēhanga Āhuarangi
Rōrahi Paerewa e tohu ana i te rōrahi hau i roto i te Āhua Paerewa (pāmahana paerewa me te āhua pāmahana), ko te Rōrahi Tuturu e tohu ana i te rōrahi i roto i tētahi Āhuatanga Whakahaere.
I roto i te ahumahi me te tauhokohoko, he mea nui ngā tikanga paerewa mō te pāmahana me te pēhanga hei tautuhi i ngā tikanga tohutoro paerewa hei whakaatu i ngā rahinga o ngā hau me ngā wai me ngā rahinga e pā ana pēnei i te tere o te rere o te rōrahi. I roto i ngā tekau tau e rima ki te ono kua pahure ake nei, i tautuhia e ngā tohunga me ngā kaipūtaiao e whakamahi ana i te pūnaha ine o ngā waeine ngā tikanga tohutoro paerewa o te pāmahana me te pēhanga hei whakaatu i ngā rahinga hau ko te 0 °C (273.15 K; 32.00 °F) me te 101.325 kPa (1 atm). I aua tau anō, ko ngā tikanga tohutoro paerewa i whakamahia whānuitia mō te hunga e whakamahi ana i ngā pūnaha emepaea, ngā pūnaha tikanga rānei o Amerika ko te 60 °F (15.56 °C; 288.71 K) me te 14.696 psi (1 atm). I whakamahia whānuitia tēnei whakamāramatanga o te Āhua Paerewa e ngā ahumahi hinu me te hau puta noa i te ao. Heoi, he maha ngā tuhinga hangarau e kī noa ana i ngā "tikanga paerewa" me te kore e tohua, ka arahi pinepine ki te whakapoauau me ngā hapa.
Ko te tātai e whai ake nei (F-2) e whakaatu ana i te whanaungatanga i waenga i te Rōrahi Paerewa me te Rōrahi Tūturu:
(F – 2)
Kei hea:
Vb = Rōrahi i te āhua paerewa, Rōrahi Paerewa rānei Vm = Rōrahi i te āhua mahi, Rōrahi Tūturu rānei Pb = Pēhanga tino i te āhua paerewa
P = Te pēhanga tino i te āhua rere
Tb = Te pāmahana tino i te āhua paerewa, KT = Te pāmahana tino i te āhua rere, K
Zb = Tauwehenga pēhitanga i te āhua paerewa Z = Tauwehenga pēhitanga i te āhua rere
I roto i te hoahoa RMS, ko te tikanga ka whakamahia e mātou te tere rere hei utu mō te rōrahi. I taua wā, ka taea te whakakapi i te rōrahi Vm me Vb e te tere rere Qm me Qb.
Kei hea:
Qm = Te Tere Rere Tuturu. Qb = Te Tere Rere Tū.
Mō te whakatau tata i te rahi o ngā paipa, ka taea te whakaaro ko Z me Zb he 1.0.
Wā tuku: Oketopa-22-2021