{"id":22247,"date":"2025-02-19T15:47:09","date_gmt":"2025-02-19T14:47:09","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=22247"},"modified":"2025-02-20T15:16:10","modified_gmt":"2025-02-20T14:16:10","slug":"com-treballar-lenergia-solar-sense-sol","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/com-treballar-lenergia-solar-sense-sol\/","title":{"rendered":"Com treballar l&#8217;energia solar sense sol?"},"content":{"rendered":"<p style=\"font-weight: 400; text-align: justify;\">Dimarts 18 de febrer de 2025 l\u2019alumnat de 6\u00e8 de prim\u00e0ria de <a href=\"https:\/\/escolanova.cat\/\" target=\"_blank\" rel=\"noopener\">l\u2019Escola P\u00fablica Escola Nova <\/a>de Cervell\u00f3 ha vingut a realitzar el projecte <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/recursos-del-medi-i-sostenibilitat\/el-nostre-amic-el-sol\/\" target=\"_blank\" rel=\"noopener\">El nostre amic el Sol.<\/a><\/p>\n<p style=\"font-weight: 400; text-align: justify;\">Nom\u00e9s arribar al <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\" target=\"_blank\" rel=\"noopener\">Camp d\u2019aprenentatge Can Santoi,<\/a> ens han demostrat tenir un munt de coneixements previs sobre els diferents tipus de radiaci\u00f3 que ens envia el Sol i quines utilitats poden tenir. Han reflexionat sobre l\u2019efecte dels colors foscos i l\u2019efecte hivernacle en relaci\u00f3 a l\u2019absorci\u00f3 de la calor i <span style=\"font-family: inherit; font-size: 1em;\">els possibles perills de les radiacions m\u00e9s energ\u00e8tiques com els raigs X o els UV.\u00a0<\/span><\/p>\n<p style=\"font-weight: 400; text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-22290 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218124037-225x300.jpg\" alt=\"\" width=\"231\" height=\"308\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218124037-225x300.jpg 225w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218124037.jpg 600w\" sizes=\"auto, (max-width: 231px) 100vw, 231px\" \/>Despr\u00e9s d&#8217;una pausa per esmorzar, s\u2019han dividit en 6 grups per tal de participar en els seg\u00fcents tallers: la cuina solar, els col\u00b7lectors solars i la producci\u00f3 d\u2019electricitat amb les plaques fotovoltaiques.<\/p>\n<p style=\"font-weight: 400; text-align: justify;\">Tres dels grups s\u2019han convertit en cuiners solars per comprovar que la forma parab\u00f2lica \u00e9s la que permet concentrar els raigs del Sol en un \u00fanic punt central, on han col\u00b7locat una olla amb una mica d&#8217;aigua i un suport amb 4 pomes condimentades amb sucre i canyella. Com que el cel estava molt cobert de n\u00favols, han utilitzat una olla negra per intentar captar el m\u00e0xim de radiaci\u00f3 solar. Cada 10 minuts han mesurat la temperatura de l\u2019aigua amb el term\u00f2metre i han vist que, malgrat els esfor\u00e7os, la temperatura nom\u00e9s ha augmentat de 16 a 18\u00baC. Tot i prendre\u00a0 consci\u00e8ncia del potencial d\u2019aquestes cuines tant senzilles per cuinar en llocs amb pocs recursos energ\u00e8tics, han pogut valorar les seves limitacions quan la meteorologia no \u00e9s del tot favorable.<\/p>\n<p style=\"font-weight: 400; text-align: justify;\">Els tres grups restants han fet d\u2019escalfadors d\u2019aigua i, amb uns col\u00b7lectors solars (unes caixes de fusta\u00a0ja\u00a0preparades amb uns a\u00efllants a l\u2019interior i una m\u00e0nega negra amb aigua a dins), han muntat tres prototips amb diferent nombre de vidres de cobertora: un sense vidre, un altre amb un vidre i un tercer amb dos vidres. Per compensar la manca de sol, s&#8217;han ajudat de bombetes de llum vermella o infraroja. En poc m\u00e9s d&#8217;una hora, la temperatura de l&#8217;aigua ha assolit els 31\u00baC! <span style=\"font-family: inherit; font-size: 1em;\">Aquest experiment els ha servit per comprendre que podem aprofitar la calor del Sol per escalfar aigua i que els vidres s\u00f3n imprescindibles per recrear un efecte hivernacle als col\u00b7lectors.<\/span><\/p>\n<p style=\"font-weight: 400; text-align: justify;\"><span style=\"font-family: inherit; font-size: 1em;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-22302\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218133913-3-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218133913-3-300x225.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218133913-3-768x576.jpg 768w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218133913-3-200x150.jpg 200w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG20250218133913-3.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/span><\/p>\n<p style=\"font-weight: 400; text-align: justify;\">Finalment, tots han participat al taller de producci\u00f3 d\u2019electricitat amb les plaques fotovoltaiques. Han apr\u00e8s que representen una bona oportunitat per canviar els sistemes d\u2019obtenci\u00f3 d\u2019energia neta, dels recursos f\u00f2ssils a les renovables i menys contaminants. En el taller han constru\u00eft un petit circuit per veure com la llum del Sol es transforma en un corrent el\u00e8ctric capa\u00e7 de moure un petit molinet. S&#8217;han sorpr\u00e8s en veure que, tot i que hem hagut d&#8217;utilitzar llum artificial, ha sigut suficient per generar electricitat amb una petita placa fotovoltaica!<\/p>\n<p style=\"font-weight: 400; text-align: justify;\">Moltes gr\u00e0cies pel vostre entusiasme i per recordar-nos a tots que: &#8220;Al mal temps, bona cara!&#8221; Fins aviat!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dimarts 18 de febrer de 2025 l\u2019alumnat de 6\u00e8 de prim\u00e0ria de l\u2019Escola P\u00fablica Escola Nova de Cervell\u00f3 ha vingut a realitzar el projecte El nostre amic el Sol. Nom\u00e9s arribar al Camp d\u2019aprenentatge Can Santoi, ens han demostrat tenir un munt de coneixements previs sobre els diferents tipus de radiaci\u00f3 que ens envia el [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":22288,"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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