Re[4]: lowcost klima :: Something smarter than us is going to emerge


node:	Re[4]: lowcost klima
template:	4
parent:	Re[3]: lowcost klima
owner:	repelent
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created:	07.06.2016 - 15:15:48
updated:	07.06.2016 - 15:16:39

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ze fukanie z ust nie je studensie preto, ze by sa stlacal vzduch pri vyfukovani
to je kokotina prva a snad najjednoznacnejsia
hned dalsia je, ze flasa stlaci a schladi vzduch (vzhladom na ostatne hluposti velmi pochybujem, ze ta flasa nieco robi ale kazdopadne vzduch sa pri stlacani zohrieva)

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inak, toto je super comment pod tym videom

From 00:45 to 00:54, the explanation experiment is WRONG. The proclaimed difference between "blowing with mouth wide open" and "blowing with lips pursed", according to this film, is only an interesting trick of body heat dissipation and heat gain. You never "FEEL" temperature. Temperature can only be measured by a thermometer. You feel WARM because you are gaining heat, and you feel COOL or COLD because your body heat is dissipating at the rate higher than heat gain.

Two reasons explain why people feel better: (1)the Eco Cooler changes temperature distribution inside the building, lower space becomes cooler because of the nature of air JET; (2)there are many gaps and tiny openings all over the surface of such a building, and since the windows is sealed with an Eco Cooler, the building is charged with positive pressure, so the hot air in upper space inside the building has to find its way to FLEE off the building.

The Eco Cooler is NICE, and the explanation about working principle is STUPID.

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mno, ono problem co vidim ja ze to nazyvaju kompresia.

ona tam sice nastava, ale, asi nie ta pri ktorej nastava zahrievanie plynu.

zjedodusme podmienky na to ze ten isty objem vzduchu co "vtecie" do sirsej casti flasky musi cez to hrdlo za rovnaky cas vytiect von. cize prud v hrdle musi ist mnohonasobne rychlejsie, a pokial viem vnutorny tlak prudiaceho plynu/tekutiny je nepriamo umerny rychlosti prudenia (cim vyssia rychlost, tym nizsi vnutorny tlak), a zas na konci hrdla nastava expanzia toho plynu.

aj ked imho viac funguje to co pri fukani na ruku - tj rychlejsim prudenim vzduchu rychlejsie odvedies teplo.

cize z moho pohladu, fyzika tam funguje, len maju uplne kokotne popisane ze aka fyzika ;)

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Pri fukani nejde o to, ze rychlejsie odvadzas teplo ale o to, ze si na ruku fukanim privadzas chladnejsi okolity vzduch (orpoti tomu ked si na nu dychnes vzduch zohriaty z pluc).. a vlastne hej, nim odvadzas teplo :) Toto ale netusim ako by malo pomoct v tej chatke.

Ak to teda nebude tou exapnziou za hrdlom, tak cim vznika ten ochladzovaci efekt? To som nie uplne pochopil ten dlhsi odstavec.

(a stale to predpoklada, ze bude do tych flasiek magicky fukat)

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ono super na tom je ze ten experiment sa da lacno zreplikovat ;) imho taky dobso by sa mohol podujat si to zriesit na zahradnej bude ;) (ja to nemam moc kde realizovat)

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buda je ti k dispozicii, ozvi sa mi doriesime kopiu kluca od branky..

00000101000635390487989308162802081629650816299308163022081630440816307708163083

ono - ak zabezpecis dostatocny positive pressure z jednej strany flasky [sirsia cast] tak potom to nejak fungovat bude [ventilator, pripadne vietor].

ale imho v stojacom horucom vzduchu bude vysledny rozdiel teplot zanedbatelny, ak uvazime ze vo vnutri
bude teplota +/- rovnaka ako vonku [video ukazuje rozdiel 10 stupnov C, co mi pride nerealne]

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akoze v stojacom vzduchu moze fungovat bezna termodynamika, ktora vyvola prudenie. aj ked ten efekt bude mat imho iba ked budes stat pri tom "okne", hlavne kvoli tomu vyvolanemu prudeniu, a hej ten teplotny rozdiel co ukazuju mi pride tiez trochu uleteny od reality