ngā purongo

muka āteteI roto i te āhua o te whakawhiti wera, ka taea te wehewehe kia maha ngā wāhanga, arā, te whakawhiti wera irahiko o te silo porous, te hau i roto i te silo porous te kawe wera me te kawe wera o te muka totoka, ka kore e arohia te whakawhiti wera convective o te hau. He whanaungatanga te mātotoru papatipu me te pāmahana, ka teitei ake te pāmahana, ka iti ake te mātotoru papatipu o te pouaka, ka piki ake te ōwehenga o te whakawhiti wera irahiko. Mō ngā hua muka ātete, ko te mātotoru papatipu kei raro iho i te 0.25g/cm', kei runga ake i te 90% te porosity, ka kitea te āhua hau hei tonu, ka kitea te āhua totoka hei motumotu, nō reira he iti noa te kawe wera totoka o te muka.
Mena he iti noa te kiato papatipu, he nui te kawe wera, he iti hoki te kawe wera; kāore hoki tēnei e rite ki te āhuatanga tūturu, pērā i te rerekētanga o te ihirangi pōro para, ahakoa he rite te kiato papatipu, he rerekē te maha o ngā muka i ia rōrahi, nō reira kāore te porosity i ia rōrahi i te ōrite, nō reira ka rerekē te kawe wera. Heoi, ka taea te whakarāpopoto i ngā whakatau kounga penei.
1. Te kawe wera ongā muka āteteKa heke haere i te pikinga o te mātotoru, ā, ka heke haere te hekenga, engari ina tae te mātotoru ki tētahi awhe, kāore te kawe wera e heke, ā, he āhua tonu ki te piki haere.
2. I ngā pāmahana rerekē, he iti rawa te kawe wera me te mātotoru iti e rite ana. Ka piki ake te mātotoru e rite ana ki te kawe wera iti i te pikinga o te pāmahana.
3. Mō te mātotoru ōrite, ka rerekē te kawe wera i runga i te rahi o ngā pūwero.
(1) Rahi o ngā pūwero 0.1mm.
0C ki roto = 0.0244W/(m . K) 100C ina λ = 0.0314W / (m. K)
(2) Te whānui o te pūaha 2mm.
I roto i te 0C = 0.0314W/(m, K) λ = 0. 0512W/(m . K) i te 100C. K)
Ko te whānui o ngā pore he 1mm, ka piki te pāmahana mai i te 0C ki te 500C, ka piki ake te uara kawe wera mā te 5.3 ngā wā; ko te whānui o ngā pore he 5mm, ka piki ake te uara kawe wera mā te 11.7 ngā wā. Nō reira, ko te nui ake o ngā pore i roto i te muka ātete, ko te iti ake o te kiato papatipu e rite ana, ā, ka piki ake te kawe wera.