Te whakamahinga o te ārai hau mō te whare heihei!

He mahi noa te whakamahi i te hauhautanga poutū hei whakamatao i ngā heihei i te raumati wera. Mō te mahi pāmu hua manu kiato nui, ko te tere o te hau i roto i tewhare heiheime eke te tere o te hau ki te 3m/s, ā, me eke te tere o te hau i roto i te whare heihei i ngā wāhi pāmahana teitei me te makuku nui ki te neke atu i te 4m/s kia pai ake ai te "pānga whakamatao hau".

 Ko te "pānga whakamatao hau" e pā ana ki te tere o te hau hei whakaiti i te pāmahana tinana o ngā heihei.

 He aha te pānga o te tere o te hau ki te pāmahana tinana o ngā heihei?

"E ai ki tētahi rangahau a Te Whare Wānanga o Georgia, i piki ake te tere o te hau mai i te 0m/s ki te 2.54m/s. Ka heke te pāmahana tinana o ngā heihei mā te neke atu i te 6"°"C."

Hei whakapiki i te tere o te hau, ko tāku mahi noa ko te hanga i tewhare heiheituanui, whakaitihia te teitei o te whare heihei, mai i te tihi o te whare heihei i te tuanui tapatoru ki raro poutū i ia tawhiti hei tāuta i tētahi ārai hau, i tētahi ārai rānei hei whakaiti i te horahanga whakawhiti o te whare heihei hei whakapai ake i te tere o te hau i roto i te whare heihei.

He aha ai tēnei, nā te mea he hononga tata te tere o te hau ki te horahanga whakawhiti o tewhare heihei.

Te tatau i te tere o te hau i roto i te whare heihei whai hau roa: tere o te hau = te rōrahi hau / horahanga whakawhiti-wāhanga o te whare heihei

E mārama ana i tēnei tauira, hei whakanui ake i te tere o te hau o te whare manu, me whakanui ake te hauhautanga o te whare manu, arā, me whakanui ake te maha o ngā pā hau ātete pēhanga kino, me whakaiti rānei te horahanga whakawhiti o te whare manu.

Ko te whakapiki i ngā pā hau he tikanga mō te whakapiki i ngā utu, te whakapiki i te whakapaunga hiko, te whakapiki i ngā utu tiaki, ā, i te wā roa ka nui ake ngā utu whakahaere mō te hinonga.

Kātahi ka whakaarohia te whakanui ake i te tere o te hau mā te whakaiti i te horahanga whakawhiti-wāhanga o tewhare heiheiKei raro nei ka mārama tātou ki ngā huringa o te whare heihei i mua atu, ā, i muri hoki i te whakanui ake i te ārai ārai-hau mā roto i ngā tātaitanga motuhake.

Hei tauira: he whare heihei 12m te whānui, 100m te roa, ko ngā pakitara taha o te whare heihei he 2.4m te teitei, ko waenganui o te whare heihei (te mea teitei rawa) he 4.8m, kua tāutahia te whare heihei ki ngā pā hau 10 50 inihi, ko te kaha hau o ia pā hau i te -50 Pa he 31000m³/h.

Ko te tere o te hau o te whare heihei me penei: tere o te hau = rōrahi hauhautanga / horahanga whakawhiti = 31000 / 3600× 10 / [12× (4.8 + 2.4) / 2] = 86.1/43.2 = 1.99m / s

Ki te tāutahia te tuanui, te ārai hau rānei ki roto i te whare heihei, kia 3.6m te teitei o te tihi o te whare heihei, o te taha raro rānei o te ārai mai i te whenua, ā, kia kore e rerekē te teitei o ngā taha e rua o te whare heihei, ko te tere o te hau he = 31000/3600×10/[12]×(3.6+2.4)/2]=86.1/36=2.39m/s

Nō reira, i roto i te take o te maha o ngā pā, mā te whakaiti i te horahanga whakawhiti-wāhanga o te whare heihei ka taea te whakanui ake i te tere o te hau i runga i te kaupapa o te 0.4m/s taketake, arā, ka piki ake te whai huatanga mā te 20%, he rerekē anō hoki ngā huringa tere o te hau i puta mai i te pānga whakamatao hau, ko te rerekētanga i waenga i ngā pānga whakamatao hau e rua e rite ana ki te pāmahana o te 2.℃, i roto i te take o te pāmahana tino tiketike, ko te rerekētanga pāmahana o te 2℃he nui hei whakararu nui i ngā heihei.