{"id":15150,"date":"2022-06-10T07:04:57","date_gmt":"2022-06-10T05:04:57","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=15150"},"modified":"2022-06-10T09:18:52","modified_gmt":"2022-06-10T07:18:52","slug":"experimentem-lenergia-solar","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/experimentem-lenergia-solar\/","title":{"rendered":"Experimentem l&#8217;energia solar"},"content":{"rendered":"<p>L&#8217;<a href=\"https:\/\/agora.xtec.cat\/escolamercerodoredamartorell\/\">Escola Merc\u00e8 Rodoreda<\/a> de Martorell ha vingut aquest dijous 9 de juny de 2022 a experimentar amb les <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/recursos-del-medi-i-sostenibilitat\/el-nostre-amic-el-sol\/\">energies del Sol<\/a> al <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\">Camp d\u2019Aprenentatge de Can Santoi\u00a0<\/a> a Molins de Rei.<\/p>\n<p>Els experiments que han fet han consistit en dos tallers per con\u00e8ixer com es pot cuinar i escalfar aigua amb la <strong>calor<\/strong> que rebem del Sol i un tercer per veure com obtenir electricitat amb la <strong>llum<\/strong> solar.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-15155\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-300x300.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-1024x1024.jpg 1024w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-150x150.jpg 150w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-768x768.jpg 768w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730-1536x1536.jpg 1536w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_145404_730.jpg 1564w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>El taller de cuina ha consistit en fer funcionar la <strong>cuina solar parab\u00f2lica<\/strong>, que gr\u00e0cies a la seva forma concentra la calor en el seu focus. Ajustant de forma curosa l&#8217;orientaci\u00f3 de la cuina\u00a0 parab\u00f2lica perpendicular a la radiaci\u00f3 solar s&#8217;ha arribat a una temperatura r\u00e8cord de 102,5\u00baC. <span style=\"font-family: inherit; font-size: 1em;\">Hem cuit unes bones pomes al forn.<\/span><\/p>\n<p>En el segon taller hem muntat uns <strong>col\u00b7lectors solars<\/strong> <strong>per a escalfar l&#8217;aigua<\/strong>. S\u00f3n de fusta, amb un a\u00efllant sint\u00e8tic suplementari de poliestir\u00e8 expandit al fons de la capsa i al seu interior, una m\u00e0nega negre que pr\u00e8viament hem emplenat amb aigua. <span style=\"font-family: inherit; font-size: 1em;\">Hem experimentat amb tres col\u00b7lectors iguals, per\u00f2 un d\u2019ells l\u2019hem deixat sense coberta de vidre, l\u2019altre amb un vidre i el tercer amb dos. Per qu\u00e8 ho hem provat? Per veure l\u2019efici\u00e8ncia de l&#8217;escalfor obtinguda al cobrir o no cobrir les m\u00e0negues negres del seu interior. Hem mesurat les temperatures inicials i finals dels tres col\u00b7lectors i hem comprovat que ha funcionat millor el col\u00b7lector cobert amb dos vidres. Altres dies m\u00e9s lluny de l&#8217;estiu ens funciona millor el d&#8217;un vidre. Ja en el mes de juny i amb un dia calor\u00f3s com el d&#8217;avui, ens ha escalfat millor el seu interior <\/span>el de dos vidres. Sobre l&#8217;efecte hivernacle que fan les cobertes de vidre, hem valorat que amb m\u00e9s cobertes arribar\u00e0 un moment que dificultaran l&#8217;entrada de la radiaci\u00f3.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-15161\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2022\/06\/IMG_20220609_121523_p-rotated-e1654845392956.jpg\" alt=\"\" width=\"300\" height=\"197\" \/>En el tercer taller hem provat com la <strong>placa fotovoltaica<\/strong> <strong>transforma la llum solar amb corrent el\u00e8ctric<\/strong> i hem fet funcionar un <strong>ventilador solar.<\/strong> Durant el muntatge hem comprovat que el corrent el\u00e8ctric necessita circular pels cables conductors, i posant un interruptor en mode \u201ccircuit obert\u201d, el ventilador no funciona perqu\u00e8 els cables deixen d\u2019estar en contacte. Tamb\u00e9 han pogut \u201ccanviar el sentit de gir\u201d del ventilador solar canviant els cables del lloc a on s\u2019alimenta el motor.<\/p>\n<p>Han descobert tamb\u00e9 la import\u00e0ncia de l&#8217;orientaci\u00f3 dels estris solars en relaci\u00f3 al recorregut que fa a l&#8217;espai, tant a l&#8217;hemisferi nord com al sud. Aqu\u00ed a on vivim l&#8217;orientaci\u00f3 inclinada i cap el sud permet una major obtenci\u00f3 d&#8217;energia del Sol i, al seu torn, les energies solars ens faciliten l&#8217;estalvi energ\u00e8tic i eviten l&#8217;emissi\u00f3 de contaminants.<\/p>\n<p>Aix\u00ed, l&#8217;escola consolida el projecte d&#8217;energies renovables i tallers que pr\u00e8viament han fet els grups de 5\u00e8. I avui, un grup molt motivat!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#8217;Escola Merc\u00e8 Rodoreda de Martorell ha vingut aquest dijous 9 de juny de 2022 a experimentar amb les energies del Sol al Camp d\u2019Aprenentatge de Can Santoi\u00a0 a Molins de Rei. Els experiments que han fet han consistit en dos tallers per con\u00e8ixer com es pot cuinar i escalfar aigua amb la calor que rebem [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15155,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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