{"id":1605,"date":"2020-07-24T15:02:00","date_gmt":"2020-07-24T11:02:00","guid":{"rendered":"https:\/\/leureunion.fr\/?p=1605"},"modified":"2022-08-04T09:52:43","modified_gmt":"2022-08-04T05:52:43","slug":"experimentation-dune-ville-eolienne-a-la-reunion","status":"publish","type":"post","link":"https:\/\/leureunion.fr\/en\/experimentation-dune-ville-eolienne-a-la-reunion\/","title":{"rendered":"Exp\u00e9rimentation d&rsquo;une ville \u00e9olienne \u00e0 La R\u00e9union"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"622\" src=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion.jpg\" alt=\"\" class=\"wp-image-1607\" srcset=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion.jpg 1024w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion-300x182.jpg 300w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion-768x467.jpg 768w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion-18x12.jpg 18w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion-500x304.jpg 500w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/zac-coeur-de-ville-leu-reunion-100x61.jpg 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption><em>ZAC C\u0153ur de Ville &#8211; La Possession &#8211; LAB R\u00e9union<\/em><\/figcaption><\/figure><\/div>\n\n\n<p style=\"font-size:15px\"><a href=\"https:\/\/leureunion.fr\/en\/contre-la-clim-concevoir-des-villes-eoliennes-en-zone-tropicale\/\">D\u00e9but de l&rsquo;article&#8230;<\/a><\/p>\n\n\n\n<p style=\"font-size:18px\"><p>Mais un b\u00e2timent bien ventil\u00e9 ne suffit pas. Pour p\u00e9renniser sa performance dans le temps, il faut \u00e9viter que les constructions \u00e0 venir autour ne viennent alt\u00e9rer cette circulation d\u2019air \u00e0 l\u2019\u00e9chelle de son environnement proche.<\/p><p>La litt\u00e9rature est riche en exemples de villes prenant en compte la ventilation de leur trame urbaine, depuis l\u2019Antiquit\u00e9 avec Vitruve vers \u2013 15, en passant de nos jours par Masdar city ou Hongkong dans leurs plans d\u2019urbanisme.<\/p><p>On constate toutefois qu\u2019aucune ne se pr\u00e9occupe vraiment de la ventilation des b\u00e2timents dans cette trame, c\u2019est-\u00e0-dire qu\u2019elles ne tiennent compte que de l\u2019\u00e9chelle urbaine et pas de l\u2019\u00e9chelle b\u00e2timent. La ville est ainsi ventil\u00e9e, mais sans pouvoir garantir que les immeubles qu\u2019elle abrite le soient. Le recours \u00e0 la climatisation risque alors de s\u2019imposer sans autre alternative possible<span style=\"font-size: revert; color: initial;\">.<\/span><\/p><p>C\u2019est \u00e0 ce travail que nous nous sommes attach\u00e9s pour concevoir une\u00a0<a href=\"https:\/\/www.leureunion.fr\/en\/projets\/zac-coeur-de-ville-possession\/\">Zone d\u2019am\u00e9nagement concert\u00e9 (ZAC) \u00e0 La Possession<\/a>, une commune localis\u00e9e au nord-est de l\u2019\u00eele de La R\u00e9union, situ\u00e9e en climat tropical humide. \u00c0 terme y est pr\u00e9vue l\u2019implantation de 1700\u00a0logements, ainsi que les services et \u00e9quipements li\u00e9s. La premi\u00e8re phase est achev\u00e9e et a d\u00e9j\u00e0 fait l\u2019objet d\u2019une reconnaissance internationale avec un second prix aux\u00a0<a href=\"https:\/\/www.construction21.org\/france\/data\/sources\/users\/5\/docs\/180926-lmazpress-la-possession-ecoquartier-centre-ville-prime-aux-green-solutions-awards.pdf\">Green Solutions Awards<\/a>\u00a0lors de la COP 24.<\/p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1.jpg\" alt=\"\" class=\"wp-image-1609\" srcset=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1.jpg 1024w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1-300x200.jpg 300w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1-768x512.jpg 768w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1-18x12.jpg 18w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1-500x333.jpg 500w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/prix-zac-coeur-de-ville-lab-reunion-1024x682-1-100x67.jpg 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption><em>Les prix remport\u00e9s pour la ZAC C\u0153ur de Ville &#8211; La Possession &#8211; LAB R\u00e9union<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:25px\">Forme des b\u00e2timents et organisation de la ville<\/h2>\n\n\n\n<p style=\"font-size:18px\">Pour penser ce quartier de 34&nbsp;hectares en tenant compte de l\u2019enjeu \u00e9olien, nous avons d\u00e9velopp\u00e9 une strat\u00e9gie \u00ab&nbsp;a\u00e9roclimatique&nbsp;\u00bb fond\u00e9e sur la prise en compte de l\u2019environnement existant, d\u2019une int\u00e9gration des effets topographiques (plaine, talweg, colline, montagne), d\u2019une r\u00e9flexion \u00e0 toutes les \u00e9chelles (de l\u2019environnement lointain, de l\u2019organisation de la ville, de la forme du b\u00e2timent et de son organisation int\u00e9rieure).<\/p>\n\n\n\n<p style=\"font-size:18px\">En effet, le site du projet ne b\u00e9n\u00e9ficie pas d\u2019un fort potentiel de ventilation compte tenu de sa position g\u00e9ographique sous le vent de l\u2019\u00eele. Une optimisation de la conception \u00e9tait donc indispensable, ce qui a motiv\u00e9 le choix d\u2019une \u00e9tude a\u00e9raulique pouss\u00e9e et le recours \u00e0 la simulation en soufflerie physique avec le laboratoire Eiffel.<\/p>\n\n\n\n<p style=\"font-size:18px\">Nous avons superpos\u00e9 cette strat\u00e9gie a\u00e9roclimatique \u00e0 la strat\u00e9gie urbaine en plusieurs \u00e9tapes&nbsp;: nous avons tout d\u2019abord \u00e9labor\u00e9 des sc\u00e9narios d\u2019am\u00e9nagement qui ont \u00e9t\u00e9 valid\u00e9s ou modifi\u00e9s par les \u00e9changes avec un expert a\u00e9raulique. Ceci nous a permis de d\u00e9finir des organisations diff\u00e9renci\u00e9es&nbsp;: b\u00e2timents plots (typologie de b\u00e2timent o\u00f9 la largeur est \u00e9quivalente \u00e0 la profondeur et \u00e0 la hauteur), b\u00e2timents en forme de barres (b\u00e2timents plus longs que larges et de profondeur inf\u00e9rieure \u00e0 12&nbsp;m\u00e8tres ici), \u00e9chelle b\u00e2tie (variation de la hauteur b\u00e2tie de R+1 \u00e0 R+6). Il est en effet \u00e9tabli qu\u2019une vari\u00e9t\u00e9 de hauteurs favorise le potentiel de ventilation d\u2019un quartier, l\u00e0 o\u00f9 les r\u00e8gles urbaines des plans locaux d\u2019urbanisme (PLU) pr\u00e9conisent trop souvent des hauteurs uniformes dans une zone.<\/p>\n\n\n\n<p style=\"font-size:18px\">Ce travail fait, nous sommes pass\u00e9s \u00e0 l\u2019\u00e9chelle des b\u00e2timents pour optimiser leur morphologie au regard de leur potentiel de ventilation naturelle, dans cette trame urbaine pr\u00e9alablement d\u00e9finie.<\/p>\n\n\n\n<p style=\"font-size:18px\">Par exemple, nous avons pr\u00e9cis\u00e9 des principes de formes architecturales de type plots organis\u00e9es autour d\u2019un patio central ou en forme de U ouvert vers les vents dominants. Nous avons par ailleurs implant\u00e9 les b\u00e2timents en d\u00e9calage les uns par rapport aux autres selon la direction des vents, afin d\u2019\u00e9viter ce que l\u2019on appelle les effets de masque, lorsqu\u2019un b\u00e2timent tiers vient \u00ab&nbsp;prot\u00e9ger&nbsp;\u00bb du vent le b\u00e2timent consid\u00e9r\u00e9 et donc emp\u00eacher sa ventilation. L\u2019ensemble de ces diff\u00e9rents choix permet au final d\u2019obtenir un confort thermique sans recours \u00e0 la climatisation.<\/p>\n\n\n\n<p style=\"font-size:18px\">Le plan du quartier a ainsi pu \u00eatre finalis\u00e9 et transcrit r\u00e9glementairement&nbsp;: ces dispositions sont d\u00e9sormais opposables aux tiers dans le Plan local d\u2019urbanisme, afin de pr\u00e9server le potentiel de ventilation naturelle de chaque construction dans la trame urbaine du quartier.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion.jpg\" alt=\"\" class=\"wp-image-1610\" srcset=\"https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion.jpg 1024w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion-300x200.jpg 300w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion-768x512.jpg 768w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion-18x12.jpg 18w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion-500x333.jpg 500w, https:\/\/leureunion.fr\/wp-content\/uploads\/2022\/08\/batiment-zac-coeur-de-ville-leu-reunion-100x67.jpg 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption><em>Fa\u00e7ade d&rsquo;un b\u00e2timent de la ZAC C\u0153ur de Ville &#8211; La Possession &#8211; LAB R\u00e9union<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-size:25px\">La ville \u00e9olienne tropicale, un concept \u00e0 transposer<\/h2>\n\n\n\n<p style=\"font-size:18px\">La premi\u00e8re tranche de travaux est maintenant achev\u00e9e et nous a permis d\u2019en faire l\u2019\u00e9valuation. Ce nouveau quartier, gr\u00e2ce \u00e0 ses pr\u00e9conisations urbaines, laisse la part belle aux jardins, aux modes de transports doux et aux respirations entre b\u00e2timents, eux aussi essentiels au confort des habitants.<\/p>\n\n\n\n<p style=\"font-size:18px\">Le r\u00e9sultat est satisfaisant sur de nombreux aspects, mais la complexit\u00e9 de l\u2019a\u00e9raulique dans la conception d\u2019un b\u00e2timent a montr\u00e9 quelques dysfonctionnements pour certaines r\u00e9alisations (porosit\u00e9 trop faible, forme architecturale non efficace). Ceci a mis en \u00e9vidence la n\u00e9cessit\u00e9 imp\u00e9rative pour les architectes d\u2019int\u00e9grer l\u2019ing\u00e9nierie a\u00e9raulique d\u00e8s la gen\u00e8se de leurs projets en co-conception d\u00e8s la phase d\u2019esquisse, o\u00f9 se dessinent des choix d\u00e9terminants pour le potentiel de ventilation d\u2019un b\u00e2timent.<\/p>\n\n\n\n<p style=\"font-size:18px\">Ce travail nous a permis de montrer la possibilit\u00e9 de d\u00e9finir et valider le concept de ville \u00e9olienne tropicale dans laquelle le \u00ab&nbsp;droit \u00e0 la ventilation naturelle&nbsp;\u00bb pour tous serait assur\u00e9. Ceci r\u00e9duit de mani\u00e8re notable le recours aux syst\u00e8mes actifs \u00e9nergivores, l\u2019impact carbone de la ville et la concentration des polluants.<\/p>\n\n\n\n<p style=\"font-size:18px\">Il est aussi envisageable de transposer une partie de ces concepts dans les villes temp\u00e9r\u00e9es, de plus en plus soumises aux cons\u00e9quences du r\u00e9chauffement climatique.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-right\" style=\"font-size:11px\">Source :&nbsp;<a href=\"https:\/\/theconversation.com\/contre-la-clim-concevoir-des-villes-eoliennes-en-zone-tropicale-132483\">https:\/\/theconversation.com\/contre-la-clim-concevoir-des-villes-eoliennes-en-zone-tropicale-132483<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9but de l&rsquo;article&#8230; Mais un b\u00e2timent bien ventil\u00e9 ne suffit pas. Pour p\u00e9renniser sa performance dans le temps, il faut \u00e9viter que les constructions \u00e0 venir autour ne viennent alt\u00e9rer cette circulation d\u2019air \u00e0 l\u2019\u00e9chelle de son environnement proche. La litt\u00e9rature est riche en exemples de villes prenant en compte la ventilation de leur trame urbaine, depuis l\u2019Antiquit\u00e9 avec Vitruve &#8230; <\/p>\n<div><a href=\"https:\/\/leureunion.fr\/en\/experimentation-dune-ville-eolienne-a-la-reunion\/\" class=\"more-link\">Read More<\/a><\/div>","protected":false},"author":1,"featured_media":1630,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1605","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Exp\u00e9rimentation d&#039;une ville \u00e9olienne pionni\u00e8re \u00e0 La R\u00e9union. 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