{"id":11090,"date":"2019-04-23T13:11:45","date_gmt":"2019-04-23T11:11:45","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=11090"},"modified":"2019-04-24T11:26:11","modified_gmt":"2019-04-24T09:26:11","slug":"cotxes-dhidrogen","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/general\/cotxes-dhidrogen\/","title":{"rendered":"Cotxes d&#8217;hidrogen"},"content":{"rendered":"<p><a href=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/hidrogenera.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11092\" src=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/hidrogenera.jpg\" alt=\"\" width=\"600\" height=\"403\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/hidrogenera.jpg 600w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/hidrogenera-300x202.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<p><strong>Per D. Rodr\u00edguez, 1r ESO<\/strong><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Els cotxes amb motor d&#8217;hidrogen podrien ser els cotxes del futur ja que tenen moltes avantatges. La m\u00e9s important \u00e9s que no contaminen.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Actualment s\u2019est\u00e0 experimentant amb motors d\u2019hidrogen amb pila de combustible. Fins l\u2019aparici\u00f3 dels cotxes el\u00e8ctrics, els motors el que fan \u00e9s cremar la benzina i aprofitar l\u2019energia en forma de calor que es genera per moure els pistons. En el cas de les piles de combustible, en canvi, l\u2019energia que es produeix quan l\u2019hidrogen es barreja amb l\u2019oxigen atmosf\u00e8ric es transforma directament en electricitat. En lloc dels fums contaminants, com el CO<sub>2<\/sub>\u00a0dels motors de benzina, l\u2019\u00fanica subst\u00e0ncia que s\u2019emet \u00e9s aigua.<\/span><!--more--><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\"><a href=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/esquema-motor.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-11096 alignright\" src=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/esquema-motor.jpg\" alt=\"\" width=\"403\" height=\"247\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/esquema-motor.jpg 600w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/esquema-motor-300x184.jpg 300w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><\/a>Una altra avantatge respecte als cotxes amb motor el\u00e8ctric \u00e9s que el temps de rec\u00e0rrega \u00e9s similar al que estem acostumats quan posem benzina. Els cotxes el\u00e8ctrics requereixen molta m\u00e9s estona.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Finalment, tamb\u00e9 cal destacar que poden tenir un nivell d\u2019autonomia similar als de benzina.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">I quins s\u00f3n els inconvenients? <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">En aquests moments hi ha molt poques estacions de servei que ofereixin la possibilitat de rec\u00e0rrega d\u2019hidrogen. Fa un any al pa\u00eds hi havia nom\u00e9s sis hidrogeneres i l\u2019objectiu \u00e9s que al 2020 n\u2019hi hagi vint. Cal dir que, a banda que la construcci\u00f3 d\u2019una hidrogenera surt cara perqu\u00e8 el sistema d\u2019emmagatzematge \u00e9s cost\u00f3s i est\u00e0 poc desenvolupat, l\u2019hidrogen no es troba lliure per agafar i utilitzar, sin\u00f3 que la seva obtenci\u00f3 ni \u00e9s barata, ni est\u00e0 exempta de contaminaci\u00f3.<a href=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/tanc-fuel-h.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-11094 alignleft\" src=\"https:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2019\/04\/tanc-fuel-h.jpg\" alt=\"\" width=\"301\" height=\"173\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/tanc-fuel-h.jpg 400w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2019\/04\/tanc-fuel-h-300x173.jpg 300w\" sizes=\"auto, (max-width: 301px) 100vw, 301px\" \/><\/a> <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">L\u2019hidrogen \u00e9s un material molt inflamable i la manca de materials adequats per operar amb seguretat i, a la vegada, capa\u00e7os de resistir les altes pressions necess\u00e0ries, tamb\u00e9 dificulten la viabilitat d\u2019aquest tipus de motors per cotxe en l\u2019actualitat. <\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Un altre q\u00fcesti\u00f3 a tenir en compte \u00e9s el preu. Per un cant\u00f3 entre els components de la pila de combustible hi ha metalls que s\u00f3n molt cars. Per l\u2019altre, com que la producci\u00f3 de cotxes amb motor d\u2019hidrogen \u00e9s baixa, encara surten molt cars, poden anar dels 40.000 als 60.000 \u20ac aproximadament.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tot i aix\u00ed, si els fabricants segueixen millorant l\u2019efici\u00e8ncia dels motors i resolent les desavantatges esmentades, qui sap si els cotxes d\u2019hidrogen es convertiran en el cotxe del futur.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Aqu\u00ed teniu un <a href=\"http:\/\/blog.racc.cat\/cotxe\/hidrogen-el-combustible-net\/\">enlla\u00e7<\/a> amb informaci\u00f3 for\u00e7a exhaustiva.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Per D. Rodr\u00edguez, 1r ESO Els cotxes amb motor d&#8217;hidrogen podrien ser els cotxes del futur ja que tenen moltes avantatges. La m\u00e9s important \u00e9s que no contaminen. Actualment s\u2019est\u00e0 experimentant amb motors d\u2019hidrogen amb pila de combustible. Fins l\u2019aparici\u00f3 dels cotxes el\u00e8ctrics, els motors el que fan \u00e9s cremar la benzina i aprofitar l\u2019energia [&hellip;]<\/p>\n","protected":false},"author":193,"featured_media":0,"comment_status":"closed","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 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":[286,1,438],"tags":[248,261],"class_list":["post-11090","post","type-post","status-publish","format-standard","hentry","category-caterina-news","category-general","category-nothoperdis","tag-revista","tag-zafra-news"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/11090","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/users\/193"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/comments?post=11090"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/11090\/revisions"}],"predecessor-version":[{"id":11098,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/11090\/revisions\/11098"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/media?parent=11090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/categories?post=11090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/tags?post=11090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}