![\"foto_bloc\"](\"http:\/\/blocs.xtec.cat\/cdacansantoi\/files\/2015\/10\/foto_bloc-300x225.jpg\")
<\/p>\nEls dies 19, 20 i 21 d’octubre els\u00a0alumnes d’aquesta escola de Martorell han realitzat \u00a0experiments relacionats amb l’energia solar.<\/p>\n
Primer han fet una petita introducci\u00f3 sobre els diferents raigs que emet el Sol i la seva utilitat. Despr\u00e9s, dividits en petits grups, han dut a terme tres tallers: el taller fotovoltaic, el taller amb col\u00b7lectors solars i el de la cuina solar.<\/p>\n
En el taller fotovoltaic han generat electricitat mitjan\u00e7ant una placa fotovoltaica tot utilitzant la llum del Sol. Amb l’electricitat obtinguda aconseguien moure\u00a0les aspes que estaven connectades a un motoret. En els dos primers dies que hi havia poc Sol ho van fer amb l’ajut de la llum provinent d’una bombeta.<\/p>\n
En el taller dels col\u00b7lectors solars han posat aigua dins unes m\u00e0negues negres que\u00a0deixaven exposades al sol durant una hora i mitja dins d’unes caixes de fusta per despr\u00e9s valorar l’augment de temperatura de l’aigua causat per la calor del Sol. A m\u00e9s, “les caixes-col\u00b7lectors” de cada grup presentaven variacions en el seu disseny: una tenia dos vidres, una altra un sol vidre i la tercera no en tenia cap. La finalitat d’aquestes difer\u00e8ncies era comprovar la capacitat de “trampa de calor” que genera el vidre quan rep radiaci\u00f3 calor\u00edfica (efecte hivernacle). Pr\u00e8viament, els alumnes s’han preguntat quina “caixa-col\u00b7lector” tindria la m\u00e0nega amb l’aigua m\u00e9s calenta i perqu\u00e8.\u00a0Ha resultar ser un experiment molt interessant.<\/p>\n
En el taller de la cuina solar han comprovat que la forma\u00a0parab\u00f2lica de la cuina\u00a0fa que la radiaci\u00f3 calor\u00edfica del Sol es concentri en el seu centre (on hi situem una olla negra) i permeti obtenir unes temperatures elevades. Tamb\u00e9 han apr\u00e8s com s’ha d’orientar per a que el seu funcionament sigui m\u00e9s eficient i per tal que les pomes amb sucre que han preparat es fessin el m\u00e9s r\u00e0pid possible.<\/p>\n
Per acabar, els grups que havien fet el taller de cuina solar i el del col\u00b7lectors se’ls han explicat entre ells i entre tots hem acabat de fer la mesura de la temperatura de l’aigua dels col\u00b7lectors solars.\u00a0Despr\u00e9s hem anat tots al laboratori per a fer una valoraci\u00f3 dels resultats obtinguts.<\/p>\n
Malgrat que no sempre ens ha acompanyat el nostre amic el Sol., esperem que h\u00e0giu gaudit i apr\u00e8s molt en tots els tallers.<\/p>\n
Podeu trobar m\u00e9s informaci\u00f3 d’aquests tallers al descriptiu de l’activitat<\/a>\u00a0i a l’article sobre la cuina solar<\/a><\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Els dies 19, 20 i 21 d’octubre els\u00a0alumnes d’aquesta escola de Martorell han realitzat \u00a0experiments relacionats amb l’energia solar. Primer han fet una petita introducci\u00f3 sobre els diferents raigs que emet el Sol i la seva utilitat. Despr\u00e9s, dividits en petits grups, han dut a terme tres tallers: el taller fotovoltaic, el taller amb col\u00b7lectors […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[262,289,265],"tags":[],"class_list":["post-3223","post","type-post","status-publish","format-standard","hentry","category-activitats","category-energia-solar","category-visites"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/posts\/3223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/comments?post=3223"}],"version-history":[{"count":1,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/posts\/3223\/revisions"}],"predecessor-version":[{"id":8838,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/posts\/3223\/revisions\/8838"}],"wp:attachment":[{"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/media?parent=3223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/categories?post=3223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-json\/wp\/v2\/tags?post=3223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}