{"id":5459,"date":"2018-02-16T18:54:02","date_gmt":"2018-02-16T16:54:02","guid":{"rendered":"https:\/\/www.factorenergia.com\/ca\/?post_type=blog&#038;p=5459"},"modified":"2025-07-29T18:29:07","modified_gmt":"2025-07-29T16:29:07","slug":"que-es-energia-blava","status":"publish","type":"post","link":"https:\/\/www.factorenergia.com\/ca\/blog\/eficiencia-energetica\/que-es-energia-blava\/","title":{"rendered":"Qu\u00e8 \u00e9s l\u2019energia blava?"},"content":{"rendered":"\n<script type=\"text\/javascript\" id=\"auto-index\" async defer>\n\n      function indexContent(context){\n\n      var container = document.querySelector(context);\n\n      element = document.getElementById(\"accordion-index\");\n      var titles = Array.from(container.querySelectorAll(\"h2\"));\n\n      for (var i = 0, l = titles.length; i < l; i++) {\n\n\t\tjQuery('#accordionIndex').show();\n\n        var tit = titles[i];\n\t\tvar newTitle = tit.textContent.toLowerCase().replace(\/[^a-zA-Z ]\/g, \"\").replace(\/\\s\/g, '-');\n\t\tvar numTag = Number(tit.tagName.replace(\/[^1-9]\/g, \"\"));\n\t\tvar tagWidth = (numTag*20);\n\n\t\tvar preText = '<span style=\"margin-left:' + tagWidth + 'px\"><\/span>';\n\n        tit.setAttribute(\"id\", newTitle);\n\t\tjQuery(tit).addClass('h-inline');\n\t\t\n\t\tvar toIndex = '<p class=\"h-inline\"><a class=\"blog-toindex\" href=\"#accordionIndex\"><span class=\"glyphicon glyphicon-chevron-up\" aria-hidden=\"true\"><\/span><\/a><\/p>';\n\n\t\tjQuery(toIndex).insertAfter(tit);\n\n        var node = document.createElement(\"LI\");                 \n        var link = document.createElement(\"A\");\n        var textnode = document.createTextNode(tit.textContent);\n\n        link.appendChild(textnode);\n        link.setAttribute(\"href\", '#' + newTitle);\n\t\t\/\/link.setAttribute(\"style\", \"margin-left:\" + tagWidth + \"px\");\n\t\tlink.setAttribute(\"class\", \"acc-h\" + numTag);\n        node.appendChild(link);\n\n        element.appendChild(node);\n\n      }\n    }\n\n    jQuery(document).ready(function(){\t\t\n\t\tindexContent(\".single-post-content\");\n\n\t\tjQuery(\".accordion-toggle\").click(function() {\n\t\t\tjQuery(this).toggleClass(\"open\");\n\t\t\tjQuery(\"#collapseIndex\").slideToggle(\"in\");\n\t\t});\n\t});\n\n\n<\/script>\n\n<style>\n\t.accordion-toggle{\n\t\tcursor:pointer;\n\t}\n\n\t#accordionIndex .panel-heading{\n\t\tmargin-bottom:0px;\n\t}\n\n\t.articulo ul, .articulo ol{\n\t\tmargin-bottom:auto;\n\t}\n\n\t.h-inline{\n\t\tdisplay: inline-flex;\n\t\tflex-wrap: wrap\n\t}\n\t#accordion-index{\n\t\tpadding-left:0px;\n\t}\n\t#accordion-index li a{\n\t\tdisplay:block;\n\t\tpadding-top:5px;\n\t}\n\n\t.acc-h2{\n\t\tmargin-left:0px;\n\t\tposition: relative;\n\t}\n\n\t.acc-h3{\n\t\tmargin-left:25px;\n\t}\n\n\t.acc-h3::before{\n\t\tcontent: \"\";\n\t\tbackground-color:var(--blue-light);\n\t\tmargin-left:-10px;\n\t\twidth: 7px;\n\t\theight: 7px;\n\t\tdisplay: inline-block;\n\t\ttext-align: center;\n\t\tborder-radius: 1000px;\n\t\tmargin-right: 10px;\n    \tmargin-bottom: 2px;\n\t}\n\n\t.acc-h4{\n\t\tmargin-left:40px;\n\t}\n\n\t.acc-h4::before{\n\t\tcontent: \"\";\n\t\tborder: 1px solid var(--blue-light);\n\t\tmargin-left:-5px;\n\t\twidth: 7px;\n\t\theight: 7px;\n\t\tdisplay: inline-block;\n\t\ttext-align: center;\n\t\tborder-radius: 100%;\n\t\tmargin-right: 10px;\n    \tmargin-bottom: 2px;\n\t}\n\n\t.acc-h3:hover::before{\n\t\tbackground-color: var(--blue-darkest);\n\t}\n\n\t.acc-h4:hover::before{\n\t\tborder-color: var(--blue-darkest);\n\t}\n\n\t@media (max-width: 992px){\n\t\t.acc-h2{\n\t\t\tmargin-left:0px;\n\t\t}\n\t\t.acc-h3{\n\t\t\tmargin-left:20px;\n\t\t}\n\t\t.acc-h4{\n\t\t\tmargin-left:40px;\n\t\t}\n\t}\n\n\t\/*\n\th2.h-inline:after,\n\th3.h-inline:after{\n\t\theight: 24px;\n\t\tcontent: \"\";\n\t\tdisplay: table-row;\n\t}*\/\n<\/style>\n\n<div id=\"table-accordion-index\">\n\t<div class=\"panel-group\" id=\"accordionIndex\">\n\t\t<div class=\"panel panel-default\">\n\t\t\t<div class=\"panel-heading\">\n\t\t\t\t<div class=\"panel-title open\"><div class=\"accordion-toggle\" data-toggle=\"collapse\" data-parent=\"#accordion\" aria-expanded=\"true\">\u00edndex<\/div><\/div>\n\t\t\t<\/div>\n\t\t\t<div id=\"collapseIndex\" class=\"panel-collapse collapse in\" aria-expanded=\"true\">\n\t\t\t\t<div class=\"panel-body\">\n\t\t\t\t\t<ul id=\"accordion-index\">\n\t\t\t\t\t<\/ul>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<p>La humanitat afronta l\u2019abastiment d\u2019energia mitjan\u00e7ant recursos renovables, que no s\u2019estan desenvolupant al ritme que es voldria. Mentrestant, <strong>les energies no renovables es consumiran m\u00e9s aviat que tard<\/strong> i, en aquesta carrera a contrarellotge, parlarem de l\u2019anomenada \u201c energia blava \u201d; una t\u00e8cnica per a l\u2019obtenci\u00f3 d\u2019energia que va n\u00e9ixer als anys setanta i no es va desenvolupar degut als requeriments tecnol\u00f2gics i al cost de la mateixa.<\/p>\n<h2>Qu\u00e8 \u00e9s l\u2019 energia blava?<\/h2>\n<p>L\u2019 <strong>energia blava o osm\u00f2tica<\/strong> sorgeix, igual la hidroel\u00e8ctrica o la mareomotriu, de mars i rius. En concret, fa \u00fas de l\u2019energia alliberada al <strong>posar en contacte aigua dol\u00e7a i salada<\/strong>; quan el riu mor al mar, la difer\u00e8ncia de salinitat entre dos tipus d\u2019aigua es pot aprofitar com a energia renovable. Aquesta energia, incl\u00fas produ\u00efda de forma \u201cprovocada\u201d, t\u00e9 com a \u00fanic residu aigua salada.<\/p>\n<p>A m\u00e9s a m\u00e9s, i en favor de l\u2019 energia blava, un dels grans avantatges d\u2019aquesta renovable \u00e9s que <strong>no necessita condicions extraordin\u00e0ries per funcionar<\/strong>, de manera que estaria operativa les 24 hores del dia sempre que hi hagi un riu desembocant al mar.<\/p>\n<h2>Com es genera l\u2019energia blava?<\/h2>\n<p>Per a produir energia blava es necessiten dos tancs: un d\u2019aigua dol\u00e7a i un altre amb aigua salada, i enmig, es col\u00b7loca una membrana semi-permeable que permeti el pas de l\u2019aigua dol\u00e7a encara que retenint els ions de sal. A major pressi\u00f3 tingui el tanc d\u2019aigua salada, millor.<\/p>\n<h3><strong>Provant, provant<\/strong><\/h3>\n<p>A m\u00e9s de la metodologia anterior, <strong>existeixen dues maneres m\u00e9s d\u2019aconseguir aquest tipus d\u2019energia<\/strong>: per una banda, l\u2019electrodi\u00e0lisi inversa, a on una membrana mou ions d\u2019un \u00fanic signe generant voltatge. D\u2019altre costat, la denominada \u201c<em>capacitive mixing<\/em>\u201d, basada en exposar dos el\u00e8ctrodes iguals als diferents tipus d\u2019aigua.<\/p>\n<p>L\u2019exist\u00e8ncia d\u2019aquestes altres metodologies resideix en la forma d\u2019obtenci\u00f3 cl\u00e0ssica d\u2019 energia blava, la primera, t\u00e9 un inconvenient: <strong>la membrana s\u2019obstrueix amb qualsevol impuresa<\/strong>. Per aquest motiu la Universitat de Pensilvania ha desenvolupat una combinaci\u00f3 dels altres dos m\u00e8todes, creant una cel\u00b7la recarregable que pugui generar un voltatge superior. Encara que de moment es tracta d\u2019una prova, podria resultar una font d\u2019energia efica\u00e7 i neta en el futur ja que, al cap i a la fi, els rius desemboquen al mar arreu del m\u00f3n; s\u00f3n recursos naturals aprofitables.<\/p>\n<h2>Altres intents<\/h2>\n<p>L\u2019 energia blava no \u00e9s nova, tot i que tampoc \u00e9s habitual. A Noruega es va inaugurar una planta pilot l\u2019any 2009. Al 2014 Holanda va posar en marxa la que va ser la primera planta comercial d\u2019 energia blava, encara que el seu prop\u00f2sit era m\u00e9s el <strong>d\u2019esbrinar la capacitat real d\u2019aquest m\u00e8tode<\/strong>. Els responsables de la planta holandesa consideren que en un futur proper aquesta mena d\u2019energia renovable podria abastir fins a la meitat de l\u2019energia que necessita el pa\u00eds sense afectar ni al caudal dels rius ni a la vida dels peixos.<\/p>\n<p>&nbsp;<\/p>\n<p>Molts ho han intentat i, pel seu potencial, segueixen insistint en aquesta energia. I com que encara no sabem fins a on arribar\u00e0, a <strong>Factorenergia<\/strong> volem explicar-te tots els <a href=\"https:\/\/www.factorenergia.com\/ca\/blog\/eficiencia-energetica\/que-son-energies-alternatives\/\">tipus d\u2019energies alternatives<\/a>, comen\u00e7ant per la solar fotovoltaica, que \u00e9s la que podem ajudar-te a gestionar: si vols <a href=\"https:\/\/www.factorenergia.com\/ca\/llars\/plaques-solars\/\" target=\"_blank\" rel=\"noopener\"><span>instal\u00b7laci\u00f3 solar per a l&#8217;autoconsum<\/span><\/a>, consulta\u2019ns sense comprom\u00eds.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L\u2019 energia blava sorgeix de mars i rius. En concret, de posar en contacte aigua dol\u00e7a i salada. Una energia renovable aprofitable les 24h.<\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[56],"tags":[],"acf":{"fecha_de_la_entrada":"20180216","imagen_portada":5674,"categoria_blog":null,"tipo_de_distribuidora":null,"tiempo_lectura":"","banner_bool":false,"titulo_banner":"","texto_banner":"","texto_boton_banner":"","url_boton_banner":"","post_relacionados":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu\u00e8 \u00e9s l\u2019energia blava? | factorenergia<\/title>\n<meta name=\"description\" content=\"L\u2019 energia blava sorgeix de mars i rius. En concret, de posar en contacte aigua dol\u00e7a i salada. 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