Pehea e nānā ai i ka nui o ka antifreeze?
Nā mea
ʻO ka nui o ka antifreeze e pili ana i ka neʻe ʻana o ka ethylene glycol
ʻO Antifreeze, ma kahi pōkole, he antifreeze home. ʻO ia hoʻi, he wai me kahi haʻahaʻa haʻahaʻa haʻahaʻa no ka ʻōnaehana hoʻomehana engine.
ʻO ka Antifreeze he ʻelua mau mea nui: ka wai a me ka ethylene glycol. ʻOi aku ma mua o 90% o ka nui o ka nui o kēia mau wai. ʻO ke koena he antioxidant, antifoam, pale a me nā mea hoʻohui ʻē aʻe. Hoʻohui pū ʻia kahi dye i ka antifreeze. ʻO kāna kumu, ʻo ia ke kuhikuhi i ka pae maloʻo o kahi wai a hōʻike i ka ʻaʻahu.
ʻO ka mānoanoa o ka ethylene glycol he 1,113 g/cm³. ʻO ka nui o ka wai he 1,000 g/cm³. ʻO ka hoʻohui ʻana i kēia mau wai e hāʻawi i kahi haku mele ʻana ma waena o kēia mau hōʻailona ʻelua. Eia naʻe, ʻaʻole laina laina kēia hilinaʻi. ʻO ia hoʻi, inā hoʻohui ʻoe i ka ethylene glycol me ka wai ma kahi ratio 50/50, a laila ʻaʻole like ka mānoanoa o ka hui ʻana me ka waiwai awelika ma waena o nā density ʻelua o kēia mau wai. ʻO kēia ma muli o ka ʻokoʻa o ka nui a me ka hoʻolālā spatial o nā molekole o ka wai a me ka ethylene glycol. ʻOi aku ka liʻiliʻi o nā molekala wai a lawe lākou i ka manawa ma waena o nā molekole ethylene glycol.
No ka antifreeze A-40, ʻo ka awelika ka nui ma ka lumi wela ma kahi o 1,072 g / cm³. I ka A-65 antifreeze, ʻoi aku ke kiʻekiʻe o kēia helu, ma kahi o 1,090 g / cm³. Aia nā papa e papa inoa i nā waiwai nui no ka antifreeze o nā ʻokoʻa like ʻole e pili ana i ka mahana.
Ma kona ʻano maʻemaʻe, hoʻomaka ka ethylene glycol e crystallize ma kahi o -12 °C. Mai ka 100% a hiki i ka 67% ethylene glycol i loko o ka hui ʻana, neʻe ka wahi ninini i kahi liʻiliʻi a hiki i kahi piko ma -75 °C. Eia kekahi, me ka hoʻonui ʻana i ka nui o ka wai, hoʻomaka ka piʻi ʻana o ka hau hau i nā waiwai maikaʻi. No laila, emi pū ka density.
ʻO ka hilinaʻi o ka nui o ka antifreeze i ka mahana
Ke hana nei kahi lula maʻalahi ma aneʻi: me ka emi ʻana o ka mahana, piʻi ka nui o ka antifreeze. E nānā pōkole kākou i ke ʻano o ka antifreeze A-60.
Ma nā mahana kokoke i ka hau hau (-60 °C), e loli ka mānoanoa ma kahi o 1,140 g/cm³. Ke hoʻomehana ʻia i +120 ° C, e hoʻokokoke ka nui o ka antifreeze i ka hōʻailona o 1,010 g / cm³. Ua like kēlā me ka wai maʻemaʻe.
ʻO ka helu Prandtl i kapa ʻia ma muli o ka nui o ka antifreeze. Hoʻoholo ia i ka hiki o ka mea hoʻomaʻamaʻa e wehe i ka wela mai ke kumu o ka hoʻomehana. A ʻoi aku ka nui o ka density, ʻoi aku ka maikaʻi o kēia hiki.
Pehea e nānā ai i ka nui o ka antifreeze?
No ka loiloi ʻana i ka nui o ka antifreeze, a me ka nānā ʻana i ka density o kekahi wai ʻē aʻe, hoʻohana ʻia kahi hydrometer. Manaʻo ʻia e hoʻohana i kahi hydrometer i hoʻolālā ʻia no ke ana ʻana i ka nui o ka antifreeze a me ka antifreeze. He ma'alahi loa ke ka'ina ana.
- E lawe i kahi ʻāpana o ka hui hoʻāʻo i loko o kahi pahu hohonu haiki, lawa no ka hoʻoinu manuahi ʻana o ka hydrometer (ua hoʻolako ʻia ka hapa nui o nā mea hana me kahi ipu ana maʻamau). E ʻike i ka mahana o ka wai. ʻOi aku ka maikaʻi e ana ma ka lumi wela. No ka hana ʻana i kēia, pono ʻoe e ʻae i ka antifreeze e kū i loko o ka lumi no ka liʻiliʻi o 2 mau hola a hiki i ka mahana wela.
- E hoʻohaʻahaʻa i ka hydrometer i loko o kahi pahu me ka antifreeze. E ana i ka mānoanoa ma ka pālākiō.
- E ʻimi i kāu mau waiwai ma ka papa me ka hilinaʻi o ka nui o ka antifreeze i ka mahana. Ma kahi mānoanoa a me ka wela ambient, hiki ke loaʻa ʻelua ratio o ka wai a me ka ethylene glycol.
Ma 99% o nā hihia, ʻo ka ratio pololei ka mea i nui ka wai. No ka mea ʻaʻole hiki ke hana i ka antifreeze ma muli o ka ethylene glycol.
ʻAʻole ʻokoʻa ka ʻenehana no ke ana ʻana i ka density o ka antifreeze ma ke ʻano o ke kaʻina hana. Eia nō naʻe, pono e hoʻopili i ka ʻikepili i loaʻa ma ke ʻano o ka loiloi ʻana i ka neʻe o ka mea hana no nā ʻano antifreezes i nā ʻano like ʻole. ʻO kēia ma muli o ke ʻano ʻokoʻa o kēia mau mea hoʻoheheʻe.
