{"id":88479,"date":"2026-08-31T18:53:59","date_gmt":"2026-08-31T16:53:59","guid":{"rendered":"https:\/\/energyear.com\/?p=88479"},"modified":"2026-09-01T10:37:35","modified_gmt":"2026-09-01T08:37:35","slug":"albedo-sector-fotovoltaico-que-es","status":"publish","type":"post","link":"https:\/\/energyear.com\/pt\/diccionario-energetico\/albedo-sector-fotovoltaico-que-es\/","title":{"rendered":"Albedo no setor fotovoltaico: o que \u00e9 e como afeta o rendimento"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"88479\" class=\"elementor elementor-88479\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cd7ed7e e-con-full e-flex e-con e-parent\" data-id=\"cd7ed7e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t<div class=\"elementor-element elementor-element-5022b9f e-con-full e-flex e-con e-child\" data-id=\"5022b9f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a80ec7d elementor-widget elementor-widget-heading\" data-id=\"a80ec7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Albedo no setor fotovoltaico: o que \u00e9 e como afeta o rendimento<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ebe8bf9 elementor-widget elementor-widget-text-editor\" data-id=\"ebe8bf9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>O albedo \u00e9 a fra\u00e7\u00e3o da radia\u00e7\u00e3o solar que uma superf\u00edcie reflete para o ambiente, em rela\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o que recebe. No setor fotovoltaico, o albedo \u00e9 um par\u00e2metro especialmente relevante em instala\u00e7\u00f5es que utilizam m\u00f3dulos bifaciais, uma vez que a radia\u00e7\u00e3o refletida pelo solo pode atingir a parte posterior dos m\u00f3dulos e contribuir para aumentar a produ\u00e7\u00e3o de eletricidade.<\/p><p>O valor do albedo \u00e9 normalmente expresso por um n\u00famero entre 0 e 1. Um valor baixo indica que a superf\u00edcie absorve uma maior propor\u00e7\u00e3o da radia\u00e7\u00e3o incidente, enquanto um valor elevado indica uma maior capacidade de reflex\u00e3o. Por exemplo, as superf\u00edcies escuras apresentam geralmente valores de albedo inferiores aos das superf\u00edcies claras.<\/p><p>Numa instala\u00e7\u00e3o fotovoltaica, o albedo n\u00e3o \u00e9 uma caracter\u00edstica do m\u00f3dulo, mas sim uma propriedade do ambiente e, principalmente, da superf\u00edcie situada por baixo e \u00e0 volta dos pain\u00e9is.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8e887f1 e-con-full e-flex e-con e-child\" data-id=\"8e887f1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-47a1915 e-con-full e-flex e-con e-parent\" data-id=\"47a1915\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ce8f8da elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"ce8f8da\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Por que raz\u00e3o o albedo \u00e9 importante numa central fotovoltaica?<\/h2><p>A import\u00e2ncia do albedo aumenta especialmente nas centrais fotovoltaicas equipadas com m\u00f3dulos bifaciais. Estes m\u00f3dulos podem aproveitar tanto a irradi\u00e2ncia que incide na sua face frontal como parte da radia\u00e7\u00e3o que atinge a sua face posterior.<\/p><p>Quando a superf\u00edcie do terreno apresenta um albedo elevado, uma maior quantidade de radia\u00e7\u00e3o solar pode ser refletida para a parte traseira do m\u00f3dulo. Esta irradi\u00e2ncia adicional pode aumentar a produ\u00e7\u00e3o de energia em compara\u00e7\u00e3o com uma instala\u00e7\u00e3o equivalente situada numa superf\u00edcie com menor capacidade refletora. O efeito final depende de diferentes vari\u00e1veis de conce\u00e7\u00e3o e das condi\u00e7\u00f5es do local:<\/p><ul><li>Valor do albedo: determina a propor\u00e7\u00e3o da radia\u00e7\u00e3o incidente que pode ser refletida pela superf\u00edcie.<\/li><li>Tecnologia bifacial: o aproveitamento da radia\u00e7\u00e3o refletida depende da capacidade do m\u00f3dulo de gerar eletricidade atrav\u00e9s da sua face posterior.<\/li><li>Altura dos m\u00f3dulos: altera a \u00e1rea vis\u00edvel a partir da parte traseira do m\u00f3dulo.<\/li><li>Dist\u00e2ncia entre fileiras: o pitch determina a \u00e1rea iluminada e a distribui\u00e7\u00e3o das sombras no terreno.<\/li><li>Inclina\u00e7\u00e3o dos m\u00f3dulos: afeta a geometria com que a radia\u00e7\u00e3o refletida atinge a parte traseira.<\/li><li>Sombreamento: as pr\u00f3prias filas de m\u00f3dulos podem reduzir a radia\u00e7\u00e3o que chega ao solo e alterar o efeito do albedo.<\/li><\/ul><p>O <span style=\"text-decoration: underline;\"><span style=\"color: #000080;\"><a style=\"color: #000080; text-decoration: underline;\" href=\"https:\/\/www.energy.gov\/ea\/national-renewable-energy-laboratory\" target=\"_blank\" rel=\"noopener noreferrer\">National Renewable Energy Laboratory (NREL)<\/a><\/span><\/span> considera o albedo um dos fatores que influenciam o fator de capacidade das centrais fotovoltaicas, a par da bifacialidade, do sombreamento, do tipo de seguimento e das perdas do sistema.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0191138 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"0191138\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"856\" src=\"https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant.png\" class=\"attachment-full size-full wp-image-88484\" alt=\"Por que raz\u00e3o o albedo \u00e9 importante numa central fotovoltaica?\" srcset=\"https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant.png 1536w, https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant-300x168.png 300w, https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant-1024x573.png 1024w, https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant-768x430.png 768w, https:\/\/energyear.com\/wp-content\/uploads\/2026\/08\/Why-is-albedo-important-in-a-photovoltaic-plant-600x336.png 600w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Por que raz\u00e3o o albedo \u00e9 importante numa central fotovoltaica?<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78f9a37 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"78f9a37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Albedo e m\u00f3dulos fotovoltaicos bifaciais<\/h2><p>A rela\u00e7\u00e3o entre o albedo e os m\u00f3dulos bifaciais \u00e9 especialmente importante durante a conce\u00e7\u00e3o e a estimativa da produ\u00e7\u00e3o de uma central solar. Num m\u00f3dulo monofacial, a radia\u00e7\u00e3o refletida pelo solo tem uma influ\u00eancia relativamente limitada na produ\u00e7\u00e3o de energia. Em contrapartida, num m\u00f3dulo bifacial, a face posterior foi concebida para aproveitar parte dessa irradia\u00e7\u00e3o. Por este motivo, conhecer corretamente o albedo do local \u00e9 fundamental para realizar uma estimativa energ\u00e9tica fi\u00e1vel.<\/p><p>De acordo com dados publicados pelo <a href=\"https:\/\/www.energy.gov\/ea\/national-renewable-energy-laboratory\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\"><span style=\"color: #000080;\">National Renewable Energy Laboratory (NREL)<\/span><\/span><\/a>\u00a0dos EUA, a radia\u00e7\u00e3o refletida pelo solo representa uma propor\u00e7\u00e3o muito mais significativa para os m\u00f3dulos bifaciais do que para os m\u00f3dulos monofaciais, uma vez que o rendimento adicional da tecnologia bifacial depende da irradi\u00e2ncia que atinge a sua face posterior. O albedo pode variar consideravelmente consoante a superf\u00edcie. O solo natural, a vegeta\u00e7\u00e3o, o cascalho, o bet\u00e3o e a neve apresentam comportamentos reflexivos diferentes. Al\u00e9m disso, o valor n\u00e3o tem necessariamente de permanecer constante ao longo de todo o ano.<\/p><p>As precipita\u00e7\u00f5es, a humidade do solo, o crescimento da vegeta\u00e7\u00e3o, a presen\u00e7a de neve ou determinadas altera\u00e7\u00f5es nas condi\u00e7\u00f5es da superf\u00edcie podem alterar a refletividade e, consequentemente, o albedo utilizado nos modelos de produ\u00e7\u00e3o.<\/p><h2>Como \u00e9 que se mede e se tem em conta o albedo numa instala\u00e7\u00e3o fotovoltaica?<\/h2><p>Para estimar corretamente o albedo de um projeto fotovoltaico, \u00e9 necess\u00e1rio caracterizar a superf\u00edcie real do local e ter em conta a sua poss\u00edvel variabilidade temporal. Nem sempre \u00e9 adequado utilizar um \u00fanico valor fixo ao longo de toda a vida \u00fatil de uma central. O albedo pode ser calculado a partir da rela\u00e7\u00e3o entre a irradi\u00e2ncia refletida por uma superf\u00edcie e a irradi\u00e2ncia incidente. Em campanhas de medi\u00e7\u00e3o espec\u00edficas, podem ser utilizados instrumentos como pirheli\u00f3metros e piran\u00f3metros orientados para registar a radia\u00e7\u00e3o incidente e refletida. Nos projetos fotovoltaicos bifaciais, o albedo \u00e9 incorporado nos modelos de simula\u00e7\u00e3o energ\u00e9tica juntamente com par\u00e2metros como a geometria das filas, a altura dos m\u00f3dulos, o pitch, a inclina\u00e7\u00e3o, o sombreamento e as caracter\u00edsticas bifaciais do m\u00f3dulo.<\/p><p>O NREL desenvolveu conjuntos de dados espec\u00edficos sobre o albedo para facilitar o planeamento e a modela\u00e7\u00e3o de sistemas fotovoltaicos bifaciais. Estes conjuntos incluem dados temporais e valores agregados de diferentes locais e tipos de superf\u00edcie. Al\u00e9m disso, ferramentas de modela\u00e7\u00e3o como <a href=\"https:\/\/bifacial-radiance.readthedocs.io\/en\/latest\/\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline; color: #000080;\">bifacial_radiance<\/span><\/a>, desenvolvida pelo NREL, permite analisar a irradi\u00e2ncia posterior dos m\u00f3dulos, tendo em conta vari\u00e1veis como o albedo, a inclina\u00e7\u00e3o, a dist\u00e2ncia entre filas, a altura dos m\u00f3dulos e o sombreamento.<\/p><h2>De que forma o albedo influencia o rendimento fotovoltaico?<\/h2><p>Um albedo mais elevado pode aumentar a irradi\u00e2ncia recebida pela face posterior de um m\u00f3dulo bifacial e, em determinadas condi\u00e7\u00f5es, melhorar a produ\u00e7\u00e3o de energia da instala\u00e7\u00e3o. No entanto, o aumento da produ\u00e7\u00e3o n\u00e3o depende exclusivamente do valor do albedo.<\/p><p>O rendimento bifacial \u00e9 determinado pela combina\u00e7\u00e3o entre as caracter\u00edsticas do m\u00f3dulo, a geometria da instala\u00e7\u00e3o e as condi\u00e7\u00f5es da superf\u00edcie. A altura dos m\u00f3dulos, a dist\u00e2ncia entre as filas, o \u00e2ngulo de inclina\u00e7\u00e3o, o seguimento solar e as sombras determinam a quantidade de radia\u00e7\u00e3o refletida que pode efetivamente chegar \u00e0 face posterior. Por este motivo, aumentar o albedo de uma superf\u00edcie n\u00e3o significa automaticamente que a produ\u00e7\u00e3o aumente na mesma propor\u00e7\u00e3o. O efeito deve ser analisado atrav\u00e9s de modelos de irradi\u00e2ncia e produ\u00e7\u00e3o que representem as caracter\u00edsticas espec\u00edficas do projeto.<\/p><p>Nos seus cen\u00e1rios tecnol\u00f3gicos para centrais fotovoltaicas de grande escala, as melhorias no albedo s\u00e3o precisamente consideradas como um dos fatores que podem contribuir para aumentar o fator de capacidade de uma instala\u00e7\u00e3o, especialmente quando combinadas com uma maior utiliza\u00e7\u00e3o de m\u00f3dulos bifaciais. A import\u00e2ncia do albedo na conce\u00e7\u00e3o de sistemas bifaciais tamb\u00e9m se reflete na normativa t\u00e9cnica. A <span style=\"text-decoration: underline; color: #000080;\"><a style=\"color: #000080; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" href=\"https:\/\/webstore.iec.ch\/en\/publication\/110893\" target=\"_blank\" rel=\"noopener noreferrer\" data-wplink-edit=\"true\">IEC 62548-1:2023+AMD1:2025<\/a><\/span> inclui requisitos relacionados com a conce\u00e7\u00e3o de pain\u00e9is fotovoltaicos e aborda aspetos espec\u00edficos dos sistemas que utilizam m\u00f3dulos bifaciais.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36892e9 elementor-widget__width-initial elementor-widget elementor-widget-post-info\" data-id=\"36892e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-5e5f915 elementor-inline-item\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-tags\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t<span class=\"elementor-post-info__item-prefix\">Tags:<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/energyear.com\/pt\/tag\/albedo\/\" class=\"elementor-post-info__terms-list-item\">Albedo<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/energia-fotovoltaica\/\" class=\"elementor-post-info__terms-list-item\">energia fotovoltaica<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/energia-solar\/\" class=\"elementor-post-info__terms-list-item\">energia solar<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/irradiancia\/\" class=\"elementor-post-info__terms-list-item\">irradia\u00e7\u00e3o<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/modulos-bifaciales\/\" class=\"elementor-post-info__terms-list-item\">m\u00f3dulos bifaciais<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/plantas-solares\/\" class=\"elementor-post-info__terms-list-item\">centrais solares<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/radiacion-solar\/\" class=\"elementor-post-info__terms-list-item\">radia\u00e7\u00e3o solar<\/a>, <a href=\"https:\/\/energyear.com\/pt\/tag\/rendimiento-fotovoltaico\/\" class=\"elementor-post-info__terms-list-item\">rendimento fotovoltaico<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>O albedo \u00e9 a capacidade de uma superf\u00edcie refletir a radia\u00e7\u00e3o solar. No setor fotovoltaico, este par\u00e2metro \u00e9 especialmente relevante para os m\u00f3dulos bifaciais, uma vez que a radia\u00e7\u00e3o refletida pelo solo pode aumentar a irradi\u00e2ncia que atinge a sua face posterior.<\/p>","protected":false},"author":2,"featured_media":88480,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[178],"tags":[247,231,237,250,248,252,249,251],"class_list":["post-88479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-diccionario-energetico","tag-albedo","tag-energia-fotovoltaica","tag-energia-solar","tag-irradiancia","tag-modulos-bifaciales","tag-plantas-solares","tag-radiacion-solar","tag-rendimiento-fotovoltaico"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Albedo: qu\u00e9 es y c\u00f3mo influye en el sector fotovoltaico - 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