{"id":6279,"date":"2021-11-18T13:12:04","date_gmt":"2021-11-18T12:12:04","guid":{"rendered":"https:\/\/sonnenallee.sma.de\/viele-wege-fuehren-zur-energiewende\/"},"modified":"2022-09-07T14:54:38","modified_gmt":"2022-09-07T12:54:38","slug":"all-roads-lead-to-the-energy-transition","status":"publish","type":"post","link":"https:\/\/sonnenallee.sma.de\/en\/solar-energy\/all-roads-lead-to-the-energy-transition\/","title":{"rendered":"All roads lead to the energy transition"},"content":{"rendered":"<header class=\"swe-post-header swe-post-header-image-right\"><div class=\"info\"><h1 itemprop=\"headline\">All roads lead to the energy transition<\/h1><div class=\"subtitle\">How roads and noise barriers can be used for solar energy.<\/div><div class=\"blog-tags\"><a href=\"https:\/\/sonnenallee.sma.de\/en\/tag\/solar-energy\/\" rel=\"tag\" class=\"tag\">#Solar energy<\/a><\/div><div class=\"boxes\"><div class=\"wpulike sonnenallee-display wp_ulike_general_class\"><div class=\"grid\"><div class=\"count-box\"><span class=\"count-box\">3<\/span><\/div><div class=\"symbol\"><\/div><\/div><\/div><div class=\"time\">3 Min.<\/div><\/div><\/div><div class=\"preview\"><img decoding=\"async\" src=\"https:\/\/sonnenallee.sma.de\/wp-content\/uploads\/2021\/11\/Verkehrswege_Header_1205x636.jpg\"\/><small class=\"copyright avia-copyright\">\u00a9 R. Kohlhauer GmbH | Gaggenau<\/small><div class=\"boxes callout\"><button class=\"share\">Share<\/button>    <div class=\"wpulike  sonnenallee-interactive\"><div class=\"wp_ulike_general_class wp_ulike_is_not_liked\"><button type=\"button\"\n                    data-ulike-id=\"6279\"\n                    data-ulike-nonce=\"676301cfbd\"\n                    data-ulike-type=\"post\"\n                    data-ulike-template=\"sonnenallee-interactive\"\n                    data-ulike-display-likers=\"0\"\n                    data-ulike-likers-style=\"popover\"\n                    class=\"wp_ulike_btn wp_ulike_put_text wp_post_btn_6279\"><span>Like<\/span>            <\/button><\/div><\/div>\n\t<\/div><div class=\"av-share-box hidden callout\"><div class=\"share-content\"><span class=\"close\"><img decoding=\"async\" src=\"\/wp-content\/themes\/enfold-child_sonnenallee\/images\/icons\/kreuz-dunkel.svg\"\/><\/span><h1>Share article<\/h1><h2>How do you want to share the article?<\/h2><ul class=\"av-share-box-list noLightbox\"><li class=\"av-share-link av-social-link-mail\"><a aria-label=\"mail\" href=\"mailto:?body=https%3A%2F%2Fsonnenallee.sma.de%2Fen%2Fsolar-energy%2Fall-roads-lead-to-the-energy-transition%2F&amp;subject=All%20roads%20lead%20to%20the%20energy%20transition\" title target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/sonnenallee.sma.de\/wp-content\/themes\/enfold-child_sonnenallee\/images\/mail.png\"\/><span class=\"avia_hidden_link_text\">mail<\/span><\/a><\/li><li class=\"av-share-link av-social-link-facebook\"><a aria-label=\"Facebook\" href=\"https:\/\/www.facebook.com\/sharer.php?u=https%3A%2F%2Fsonnenallee.sma.de%2Fen%2Fsolar-energy%2Fall-roads-lead-to-the-energy-transition%2F&amp;t=All%20roads%20lead%20to%20the%20energy%20transition\" title target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/sonnenallee.sma.de\/wp-content\/themes\/enfold-child_sonnenallee\/images\/facebook.png\"\/><span class=\"avia_hidden_link_text\">Facebook<\/span><\/a><\/li><\/ul><\/div><\/div><\/div><\/header>\n<div class=\"swe-post-container\">\n<div class=\"swe-author author\"><p><strong>Text:<\/strong> Oliver Sitt, 18.11.2021<\/p><\/div>\n<section  class='av_textblock_section av-hm5a1-04a1b10d35550a643b98b6cb1ed0bc82'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>Germany aims to be climate-neutral by 2045, and other countries have set similar goals. But how can these goals be achieved? One thing\u2019s for sure: Renewable energies will play a key role. A study conducted by the Fraunhofer Institute for Solar Energy Systems ISE calculated that solar power production will have to increase tenfold by 2045. In concrete terms, this means that the area given over to photovoltaics would also have to increase around tenfold. This is precisely where our roadways could play a vital role.<\/strong><\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-hm5a1-5-33125cc9043eebd9f52059cd62003287'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Green fields. A little further off, a clump of trees. The sun is shining. Trucks are thundering past. Here, the B12 federal highway takes a long curve around a residential area. The houses are isolated from the road by a noise barrier, which stands around 5 meters high and is 230 meters long. Hardly anyone driving along the road will be aware that this is no ordinary noise barrier \u2013 it also generates electricity. Only if you take a closer look will you see the shimmering blue tone characteristic of PV modules.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-l7rm9uax-b358930a928ec57e637a8403e6e29d46\">\n#top .hr.hr-invisible.av-l7rm9uax-b358930a928ec57e637a8403e6e29d46{\nheight:30px;\n}\n<\/style>\n<div  class='hr av-l7rm9uax-b358930a928ec57e637a8403e6e29d46 hr-invisible  avia-builder-el-5  el_after_av_textblock  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-l6w5dt5b-493994f0125649a01e76ff0f485d8d5f'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Solar power from noise barriers<\/strong><\/h2>\n<p>The idea of launching a groundbreaking project like this in the small town of Neu\u00f6tting in Upper Bavaria, Germany, was conceived by EnergieGenossenschaft Inn-Salzach eG (Egis). When the noise barrier was being planned, Egis wasted no time in advocating the idea of utilizing the space for solar power production. The municipality paid for the noise barrier, while Egis paid the extra cost of the modules. However, the electricity-generating noise barrier had to be specially developed, a task performed in collaboration with a solar specialist and the company R. Kohlhauer GmbH that had already developed its own prototype for noise abatement systems.<\/p>\n<h2><strong><br class=\"avia-permanent-lb\" \/><br class=\"avia-permanent-lb\" \/>Noise abatement \u2013 plus 50,000 kWh of solar power every year<\/strong><\/h2>\n<p>After years of intensive planning and development, the noise barrier was connected to the grid in 2016. Since then, it has been not only protecting the nearby Montessori school from traffic noise, but also supplying it with electricity. The south-facing noise barrier produces a good 50,000 kWh of power, around 80% as much as would be produced by a ground-based PV system \u2013 only without the extra space that a ground-based system requires. Jonas Huyeng from the Fraunhofer Institute for Solar Energy Systems ISE talks to SONNENALLEE about the background to this project: \u201cIt\u2019s always about finding a compromise between optimum electricity yield and noise abatement. The Neu\u00f6tting noise barrier stands not vertically but at a slight angle, which helps increase the energy yield with only a minimal reduction in noise abatement.\u201d It\u2019s a compromise that everyone can live with.<\/p>\n<\/div><\/section>\n<div class=\"flex_column av_one_full flex_column_div  avia-builder-el-7  el_after_av_textblock  el_before_av_textblock \"><div class=\"swe-special-images swe-special-images-1 subtitle\"><div class=\"image-container image-container-image-1\"><img decoding=\"async\" src=\"https:\/\/sonnenallee.sma.de\/wp-content\/uploads\/2021\/11\/Verkehrswege_artikel_900x666_01.jpg\" alt=\"Wir sehen von unten fotografiert eine L\u00e4rmschutzwand, die im oberen Teil aus Photovoltaikmodulen besteht.\" aria-label=\"\u201cThe highway operators don\u2019t have a clue what to do with the electricity. They don\u2019t possess any expertise in marketing electricity.\u201d\" \/><small class=\"copyright avia-copyright\">\u00a9 R. Kohlhauer GmbH | Gaggenau<\/small><\/div><span class=\"image-subtitle\"><span class=\"image-subtitle-inner image-description\">\u201cThe highway operators don\u2019t have a clue what to do with the electricity. They don\u2019t possess any expertise in marketing electricity.\u201d<\/span><\/span><\/div><\/div>\n<section  class='av_textblock_section av-l6w5e404-32e8619a7678ab580f70e5eb02a5d339'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>The Fraunhofer Institute also sees the potential<\/strong><\/h2>\n<p>The project has already received numerous awards. R. Kohlhauer GmbH now mass-produces the noise barrier under the name \u201cVolta.\u201d As a pioneer in this field, the company is currently engaged in a Fraunhofer ISE project focusing on noise abatement and photovoltaics. \u201cOne of the aims,\u201d says Huyeng, the 33-year-old physicist, \u201cis to optimize the sound absorption capability of the modules. Currently, the sound is merely reflected. But if the solar modules were also capable of damping the sound, this would open up a whole new range of potential applications for the noise barriers.\u201d<\/p>\n<p>Research is also being conducted into how existing noise barriers could be retrofitted with photovoltaics. \u201cCombining photovoltaics with noise abatement capability offers a number of benefits,\u201d says Huyeng. \u201cWherever noise abatement systems are constructed, there are also always consumers who can utilize the electricity. After all, these noise barriers are ultimately always designed to protect people from noise. And the installation outlay is almost identical.\u201d The fact that no additional space is required is another reason why they enjoy a high level of acceptance among the population.<\/p>\n<p>The fruit of this partnership between Neu\u00f6tting and Egis is a noise abatement system that produces 50,000 kW of solar power every year.<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-hm5a1-4-50d773936cf112ce203272349c63287a'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Project almost thwarted by tendering regulations<\/strong><\/h2>\n<p>The idea of protecting against noise while simultaneously producing electricity sounds like a promising business model, but sales in this segment are currently rather modest. \u201cThe problem,\u201d says Huyeng, \u201cis that when noise abatement measures are put out to tender under public procurement law, it\u2019s always the lowest bidder that snaps up the contract. And there are no provisions for the barrier to do anything more than simply protect against noise.\u201d But it stands to reason that a noise barrier with integrated photovoltaics is more expensive than a standard noise barrier, so any provider of a concept like this is always going to be knocked out of the running. Huyeng, one of the leading researchers in this field, sees yet another problem: \u201cThe highway operators don\u2019t have a clue what to do with the electricity. They don\u2019t possess any expertise in marketing electricity.\u201d Given this fact, the success of the Neu\u00f6tting project seems to be something of a fluke because the energy cooperative already had a ready customer for the electricity: the local municipality itself. But the electricity-generating noise barrier now has yet another advocate. The CSU representative Dr. Martin Huber, who sits in the Bavarian state parliament, is keen to see more noise barriers with integrated photovoltaics in the near future \u2013 in Bavaria, at least.<\/p>\n<h2><strong>Utilizing roads to generate electricity<\/strong><\/h2>\n<p>Only a limited number of noise barriers are suitable for generating electricity \u2013 but there are innumerable roads and cycle paths that are exposed to the heat of the sun all day. The potential here is likely huge \u2013 even just in terms of surface area alone. Jonas Huyeng confirms this: \u201cA study conducted by our organization quantifies the technical potential at 238 TWh per year.\u201d To put this figure in context, RWE\u2019s Neurath Power Station \u2013 Germany\u2019s biggest lignite-fired power station \u2013 feeds 31.3 TWh into the network per year.<\/p>\n<h2><strong>PV modules, not asphalt<\/strong><\/h2>\n<p>Maybe this is why so many startups and enterprises have tried over the past decade to come up with ways of generating electricity from our road infrastructure. In France, work began on constructing an almost 1,000-kilometer-long \u201csolar roadway.\u201d That same year, in the Netherlands, another company unveiled its first solar cycle path, with the company\u2019s most recent project being a 330-meter-long cycle path. In Germany, too, a 90-meter-long solar cycle path was built near Cologne in 2018. All these projects are still in the development stage. Challenges associated with road-based projects include not only the wear and tear of sustained traffic but also dirt caused by leaves, tire abrasion and damp getting into the system. (More detailed information about the companies and projects can be found in the info box at the end of the article.)<\/p>\n<\/div><\/section>\n<div class=\"flex_column av_one_full flex_column_div  avia-builder-el-10  el_after_av_textblock  el_before_av_textblock \"><div class=\"swe-special-images swe-special-images-2 subtitle\"><div class=\"image-container image-container-image-1\"><img decoding=\"async\" src=\"https:\/\/sonnenallee.sma.de\/wp-content\/uploads\/2021\/11\/Verkehrswege_artikel_900x666_02.jpg\" alt=\"\" aria-label=\"A cycle path made from PV modules constructed in 2014 by the Netherlands-based Solamove was the company\u2019s first solar cycle path.\" \/><small class=\"copyright avia-copyright\">\u00a9 SolaRoad BV; Den Haag<\/small><\/div><span class=\"image-subtitle\"><span class=\"image-subtitle-inner image-description\">A cycle path made from PV modules constructed in 2014 by the Netherlands-based Solamove was the company\u2019s first solar cycle path.<\/span><\/span><\/div><\/div>\n<section  class='av_textblock_section av-hm5a1-3-4efaa2a539ba6ac9797e0ec7eb77d855'  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong>Photovoltaics overhead, not on the ground<\/strong><\/h2>\n<p>A technically more reliable solution seems to be the one developed as part of the \u201cPV-S\u00fcd\u201d pilot project by the Fraunhofer ISE. Here, the PV modules are installed overhead, not along the ground. This has a number of advantages over ground-based systems, including the lack of shading and the fact that the panels are not subjected to the constant stresses and strains of sustained traffic. The challenges, however, lie elsewhere. Even Huyeng was surprised: \u201cSolar canopies over roads are subject to extremely high safety requirements and have to withstand even the forces generated if a truck collides with the canopy structure.\u201d But he\u2019s optimistic: \u201cIf everything goes to plan, we will be launching our prototype project in early 2022.\u201d<\/p>\n<h2><strong>An 80-meter solar canopy is legally a tunnel<\/strong><\/h2>\n<p>If the project meets expectations, this will open up enormous potential. However, for solar canopies to become more widespread, legislators will have to step in. Huyeng explains: \u201cCurrently, any type of road covering that\u2019s more than 80 meters long \u2013 even if it\u2019s open to the sides \u2013 is considered to be a tunnel, along with all the safety provisions like escape routes, ventilation, etc. that this entails. That would see costs skyrocket.\u201d<\/p>\n<h2><strong>Does asphalt last longer if it\u2019s covered?<\/strong><\/h2>\n<p>The PV-S\u00fcd consortium still has an ace up its sleeve. The canopy, which protects the road against frost and heat, could help increase the durability of the road surface. If this theory is confirmed, that would be an important added value for this technology.<\/p>\n<h2><strong>Identifying what\u2019s possible<\/strong><\/h2>\n<p>It\u2019s amazing to see just how many photovoltaics-based concepts already exist for utilizing our traffic infrastructure to generate electricity. Only time will tell how much economic and ecological potential can be reasonably leveraged in this way over the long run. Or, as Huyeng puts it: \u201cIt\u2019s not about finding one catch-all solution, but about identifying what\u2019s possible.\u201c One thing\u2019s for sure: There is a whole range of exciting developments that are worth keeping an eye on.<\/p>\n<\/div><\/section>\n<div  class='av_promobox av-kbupbijg-05a9835c75e9a7cc0eed1aba9c9b2342 avia-button-no  avia-builder-el-12  el_after_av_textblock  avia-builder-el-last '><div class='avia-promocontent'><h2>Photovoltaics as a road surface<\/h2>\n<p>European companies active in the field of electricity-generating roadways:<\/p>\n<p><a href=\"https:\/\/www.wattwaybycolas.com\/en\/homepage.html\" target=\"_blank\" rel=\"noopener\"><u>Wattways<\/u><\/a> \u2013 A brand founded by the French road construction firm Colas. The French government wanted to embed PV modules along around 1,000 kilometers of roads, but the project encountered problems and building work had to be halted. Efforts are being made to improve the system.<\/p>\n<p><a href=\"https:\/\/www.SolaRoad.nl\/\" target=\"_blank\" rel=\"noopener\"><u>SolaRoad<\/u><\/a> \u2013 In 2016, this Dutch company unveiled a 90-meter-long solar cycle path. The company has since launched a number of pilot projects for motorized traffic \u2013 a bus lane, for example. SolaRoad uses concrete elements in which PV modules are embedded.<\/p>\n<p><a href=\"https:\/\/www.solmove.com\/en\/\" target=\"_blank\" rel=\"noopener\"><u>Solmove<\/u><\/a> \u2013 Instead of working with rigid modules, this German startup uses a \u201csolar carpet\u201d that can be bonded to the existing road surface. In 2018, Solmove unveiled a 90-meter-long solar cycle path, although the project was beset with teething troubles caused by damp and moisture.<\/p>\n<p>A number of projects have also been launched in East Asia. In 2017, China opened a 2-kilometer-long route of  solar panels along a city highway, while South Korea can boast a cycle path with a canopy of solar panels.<\/p>\n<\/div><\/div>\n<div class=\"center-content\"><a href=\"https:\/\/sonnenallee.sma.de\/en\/\" class=\"btn inverted\">Close article<\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Just how much power-generating potential is lying dormant in and around our traffic infrastructure? Can PV modules withstand the weight of sustained truck traffic? What\u2019s feasible and what\u2019s not?<\/p>\n","protected":false},"author":26,"featured_media":6260,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","beyondwords_generate_audio":"1","beyondwords_project_id":"16115","beyondwords_content_id":"","beyondwords_preview_token":"","beyondwords_player_content":"","beyondwords_player_style":"","beyondwords_language_code":"","beyondwords_language_id":"","beyondwords_title_voice_id":"","beyondwords_body_voice_id":"","beyondwords_summary_voice_id":"","beyondwords_error_message":"","beyondwords_disabled":"","beyondwords_delete_content":"","beyondwords_podcast_id":"4862592","beyondwords_hash":"4d89f2b7c5b5c8a2dc26012d8f3c3fcdc95745ef","publish_post_to_speechkit":"","speechkit_hash":"","speechkit_generate_audio":"","speechkit_project_id":"","speechkit_podcast_id":"","speechkit_error_message":"","speechkit_disabled":"","speechkit_access_key":"","speechkit_error":"","speechkit_info":"","speechkit_response":"","speechkit_retries":"","speechkit_status":"Updated","speechkit_updated_at":"","_speechkit_link":"","_speechkit_text":""},"categories":[77],"tags":[89],"class_list":["post-6279","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solar-energy","tag-solar-energy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>All roads lead to the energy transition - Sonnenallee<\/title>\n<meta name=\"description\" content=\"The embedding of photovoltaics in existing infrastructure offers a multitude of benefits. 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