{"id":22323,"date":"2025-02-21T14:28:50","date_gmt":"2025-02-21T13:28:50","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=22323"},"modified":"2025-02-24T11:30:15","modified_gmt":"2025-02-24T10:30:15","slug":"el-sol-es-irremplacable","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/el-sol-es-irremplacable\/","title":{"rendered":"El Sol \u00e9s irrempla\u00e7able"},"content":{"rendered":"<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-22330 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/2-11-169x300.jpg\" alt=\"\" width=\"198\" height=\"351\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/2-11-169x300.jpg 169w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/2-11.jpg 450w\" sizes=\"auto, (max-width: 198px) 100vw, 198px\" \/>Dijous 20 de de febrer de 2025 l\u2019alumnat de 6\u00e8 de prim\u00e0ria de <a href=\"https:\/\/agora.xtec.cat\/escolaisidremarti\/\" target=\"_blank\" rel=\"noopener\">l\u2019Escola Isidre Mart\u00ed <\/a>d&#8217;Esplugues de Llobregat 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=\"text-align: justify;\">Nom\u00e9s arribar al\u00a0<a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/\" target=\"_blank\" rel=\"noopener\">Camp d\u2019aprenentatge Can Santoi,<\/a>\u00a0ens 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\u00a0els possibles perills de les radiacions m\u00e9s energ\u00e8tiques com els raigs X o els UV.<\/p>\n<p style=\"text-align: justify;\">Despr\u00e9s d\u2019una pausa per esmorzar, s\u2019han dividit en 9 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=\"text-align: justify;\">Sis 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\u2019aigua i un suport amb 4 pomes condimentades amb sucre i canyella. Tot i que el cel estava molt cobert de n\u00favols, han volgut replicar aquest\u00a0 proc\u00e9s dues vegades, de manera que tres grups han utilitzat una\u00a0olla negra i els altres tres una olla blanca. Cada 10 minuts han mesurat la temperatura de l\u2019aigua amb el<img loading=\"lazy\" decoding=\"async\" class=\"alignright  wp-image-22332\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG_6589-300x224.jpg\" alt=\"\" width=\"308\" height=\"230\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG_6589-300x224.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG_6589-200x150.jpg 200w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/IMG_6589.jpg 640w\" sizes=\"auto, (max-width: 308px) 100vw, 308px\" \/> term\u00f2metre i han vist que, malgrat els esfor\u00e7os, nom\u00e9s ha augmentat 4\u00baC en els dos casos en una hora. Tot i prendre\u00a0 consci\u00e8ncia del potencial d\u2019aquestes cuines tant senzilles per cuinar en llocs amb pocs recursos energ\u00e8tics, han pogut experimentar de primera m\u00e0 les seves limitacions quan la meteorologia no \u00e9s del tot favorable.<\/p>\n<p style=\"text-align: justify;\">Els tres grups restants han fet d\u2019escalfadors d\u2019aigua i, amb uns col\u00b7lectors solars (unes caixes de fusta ja preparades 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\u2019han ajudat de bombetes de llum <img loading=\"lazy\" decoding=\"async\" class=\" wp-image-22336 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/3-6-225x300.jpg\" alt=\"\" width=\"224\" height=\"298\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/3-6-225x300.jpg 225w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/02\/3-6.jpg 600w\" sizes=\"auto, (max-width: 224px) 100vw, 224px\" \/>vermella o infraroja. Al cap d&#8217;una hora, la temperatura de l\u2019aigua de les m\u00e0negues ha pujat uns 18\u00baC, assolint en els tres casos uns 30\u00baC! Sembla que aquest cop no hem pogut replicar l&#8217;efecte hivernacle amb l&#8217;\u00fas de les cobertes de vidre.\u00a0 Malgrat tot, aquest experiment els ha servit per comprendre que podem aprofitar la calor del Sol per escalfar aigua en dies assolellats.<\/p>\n<p style=\"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\u2019han sorpr\u00e8s en veure que, tot i que hem hagut d\u2019utilitzar llum artificial, ha sigut suficient per generar electricitat amb una petita placa fotovoltaica!<\/p>\n<p style=\"text-align: justify;\">Moltes gr\u00e0cies per la feina feta i el vostre entusiasme! Ens veiem aviat!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dijous 20 de de febrer de 2025 l\u2019alumnat de 6\u00e8 de prim\u00e0ria de l\u2019Escola Isidre Mart\u00ed d&#8217;Esplugues de Llobregat ha vingut a realitzar el projecte El nostre amic el Sol. Nom\u00e9s arribar al\u00a0Camp d\u2019aprenentatge Can Santoi,\u00a0ens han demostrat tenir un munt de coneixements previs sobre els diferents tipus de radiaci\u00f3 que ens envia el Sol [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":22326,"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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