25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

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Poatecnautobuzul331(sauoricarealtul),nghesuiiprecumsardinelenconservesaucapinguiniipebanchiz,antiiaduldeafarnuvisepareattdenfiortorderecepectestedeadevratelea.Poatecinjuraidezorpesusintoriipovetiicunclzireaglobal,cndrcirealocaladattotulpestecap(despreastamaivorbimcndofimaicldu).

Sau,poate,cndieiidinautobuzul331(sauoricarealtul),vlovetebruscaaungercnicinumaiaveiputereasvntrebaiDecenaibamieattdefrig?.Ei,delaclduric,eumamntrebatiamiaflatrspunsul.Aredeafacecufelulncarepercepemnoifrigulicldura.Corpulnostrureacioneazlatemperaturiexcesive(preamarisaupreamici)prinreglareaniveluluidetranspiraieiatemperaturiisuperficiale(unsistemfrigorificabsolut

25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

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genialcreatdectrenatur).Cndceledousntreglate,nfunciedetemperaturamediului,percepianoastrestefiecepreacald(vara,cndeumiditatemare)fieprearece(iarna,cndmaibateicrivul).Despreheatindexospovestimlavar,cndoficazul.Acumvorbimdewindchillfactor,saufactorulderciredinparteavntului.

Sigurtiidespreefectulvntului/curentuluiasupraevaporrii.Sautiifrstii.Deaiafolosimusctoaredepr,sauturbinelealeadeuscatminileprintoaletelebarurilor:cuctvitezaunuicurentdeaerpedeasuprauneisuprafeeemaimare,cuattevaporareaemairapid.ideaiavuscai,lamare,chiardacsoareleeascunsnnori,nsbatebriza.Totodat,organismulpierdecldurprinprocesulevaporriidepesuprafaapielii.ideaiaviatremuriciulcndvuscainbriz.

Eibine,cndefoartefrigcorpulncearcsipstrezetemperaturasuperficialsuficientderidicatnctsnuaparefectenasoaleasupraorganismului(degerturi,paregzamplu).Iarmeninereatemperaturiipieliimainaltdecttemperaturadinexterior,plusevaporareamairapiddincauzavntului(decipierdereamairapiddecldur)vcreeazsenzaiacemaifrigdectarindicaotemperaturadinexterior.

Aiciintervineaazisulwindchillfactor.Existioformuldeconversie,pecareamdescoperitopewikipedia:

TWC=13,12+0,6215xTa11,37xV0,16+0,3965xTaxV0,16,

undeTaestetemperaturaaerului,iarVestevitezavntuluila10metrinlime(acoloseplaseazanemometrele).Iaca,deexempludacafarsnt10oCiunvntdenuma50dekm/h,senzaiavoastrvaficsnt22oC.Camaspru,nu?

Pentrualtetemperaturiivitezealevntuluiputeiaflatemperaturaaparentdintabelulsta,csntsigurcnuvveiapucasfaceicalculecuecuaiademaisus.

25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

http://www.sciencefriction.ro/2012/02/09/emaifrigcindbatevintul/ 3/9

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Peminemiacutremuricinumacndmuitlatabelulsta,darmitesmaiiiesnteroareadeafar!Voicumrezistai?

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Tags:evaporare,frig,heatindex,piele,temperatura,vnt,windchillfactor

10comments

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1.

Mimanu

February9,2012at16:11(UTC3)

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25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

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Nutiseparecevaciudatinformulaasta?DacainlocuiestiTasiVcu0itidaunrezultatde13.12C.

1.

Mimanu

February9,2012at16:28(UTC3)

Reply

Gasitexplicatia.Formulaseaplicapentruunintervaldetemperaturide(inf,10)(intervalinchisla10,daramtastaturainromanasinugasescparantezadreapta )sipentruunintervaldetemperaturide(4,8km/h,inf)

1.

TataUraniu

February9,2012at21:07(UTC3)

Acumamajunsiioacasitocmaimpregteamsirspundcuexactcezicitumaisus.

2.

Mimanu

February9,2012at16:23(UTC3)

Reply

Inlocsafactreabamatindeprostii.MiamadusamintecainapropierearevelionuluiamvazutostirecalaVf.Omusaresimtitotemperaturade88grade.Amfacutunexcelacumcuformuladatadetine,iarpentruovitezaavantuluide144km/h(conformarticolului)temperaturaaeruluiarfifostde50C.MisepareamiecusutacuataalbatreabaastaConcluziaestecaavemredactoridetoatajena.Aiciarticolulverificat:http://www.a1.ro/news/social/88clavarfulomurecorddetemperaturascazutadincauzavantului190056.html

1.

25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

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TataUraniu

February9,2012at21:11(UTC3)

Reply

Defapt,conformtabeluluiasociat(stademaisus)88degradenegativnseamncam55ivntde80km/h.Vntularfiok,plauzibil,da55lambagndubii.Armaiputeafi35iovitezcolosal,pecaremielenesocalculez.

3.

belami

February9,2012at20:14(UTC3)

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ecuatiaaiaare,defapt,doardouarezultate:efrigdetecacipetinesaube)nu

1.

TataUraniu

February9,2012at21:12(UTC3)

Reply

Efrigdetecacipetinesaube)eattdefrig,cnicistecacipetinenuetinstare.

1.

belami

February10,2012at14:48(UTC3)

tresamainclin!cinesepricepesepricepe!stiintanuipentruoricine

4.

Mostrofontz

February10,2012at19:46(UTC3)

25.06.2015 Deceemaifrigcndbatevntul?ScienceFriction

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Da,mistorelatia!Melikeit!DaioprefersafiecaldRelatiaastaimiaduceamintedeNansensiexpeditiaFram,candneneaNansencuamicului(Johansenparca)aupetrecutmaibinede1anpecalotaglaciaranordica.Cumorfisupravietuit,eistiuUiteaiciunlinkpentrucinenaretreabazileleastea:http://vplay.ro/watch/nmmbyubd/EuimiamintesccumausarbatoritCraciunul:Nansensiaschimbatchilotiiprimaoaradupaunandezile(introexpeditiepolaraprobabilcaieipapicasicombustibilsatopestigheata,nuchiloti)iaramicullui,sielcredcatotnespalatdevreunansiaintorscamasapeparteaailaltaUau!Orelatiedechillfactorcandtebagisafacibaielacopcanai?Candsunt55degradeinaeruldinjur,cumteoisimticandtebagiinapa?!

1.

TataUraniu

February10,2012at23:26(UTC3)

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haha,iocrecapaeramaicald,nu?ceeaceenasol,cieiitetaiefrigu.Nicinuvreauscomentezpeaiacuchiloi/tricountors.Decipentrudinstea,namnicirelaii,nicicomentarii.Dectcnusemaifabricoamenidintia.

1. Deceemaicaldcndumiditateaimare?|ScienceFriction

July10,2012at09:02(UTC3)Linktothiscomment

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[]textmaivechi.Areaproapeaseani,dasituaiaefixaceeai.Pentrucvaranuicaiarna(duh!),darnicicavaratrecut.Emai[]

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