{"id":9213,"date":"2019-02-13T10:00:42","date_gmt":"2019-02-13T09:00:42","guid":{"rendered":"https:\/\/www.mitacoolingtechnologies.com\/risorse\/articoli-tecnici\/torri-evaporative-perche-la-vetroresina-e-sempre-attuale\/"},"modified":"2024-10-31T12:04:42","modified_gmt":"2024-10-31T11:04:42","slug":"fibreglass-cooling-towers-why-are-they-still-up-to-date","status":"publish","type":"articoli-tecnici","link":"https:\/\/www.mitacoolingtechnologies.com\/en\/sources\/technical-articles\/fibreglass-cooling-towers-why-are-they-still-up-to-date\/","title":{"rendered":"Fibreglass cooling towers: why are they still up-to-date?"},"content":{"rendered":"\n<p>di Giorgio Lorenzetti &#8211; Technical Manager<\/p>\n\n\n\n<p><!--more--><\/p>\n\n\n\n<p>Molti costruttori di torri evaporative a circuito aperto e chiuso, anche di grandi dimensioni, continuano ad utilizzare la <strong>vetroresina<\/strong> per la realizzazione di componenti di vario genere, se non addirittura di profili strutturali come nel caso delle torri \u201cfield erected\u201d.<\/p>\n\n\n\n<p>Viene da chiedersi quali siano le ragioni che inducono a questa scelta. Va tenuto conto che il materiale composito in questione ha costi ben pi\u00f9 alti della lamiera. Inoltre, sia per quanto riguarda la costruzione di <strong>componenti di \u201ccarrozzeria\u201d <\/strong>della macchina che di <strong>profili pultrusi dedicati<\/strong>, richiede investimenti non indifferenti a livello di attrezzature di produzione.<\/p>\n\n\n\n<p>Peraltro, una costruzione che prevede ad esempio l\u2019utilizzo di <strong>pannelli di lamiera presso-piegati e forati <\/strong>\u00e8 indubbiamente pi\u00f9 standardizzabile e semplice che non allestire un \u201cparco\u201d stampi per la produzione di componenti dedicati in vetroresina. A questi si richiede poi generalmente anche una finitura estetica\u2026 vicina a quella delle carrozzerie per l\u2019automotive o per componenti di arredamento.<\/p>\n\n\n\n<p><strong>Allora\u2026 perch\u00e8?<\/strong><\/p>\n\n\n\n<br>\n\n\n\n<h2 class=\"wp-block-heading\">Vantaggi della vetroresina<\/h2>\n\n\n\n<p>La risposta \u00e8 semplice nella sua essenza, ma frutto di considerazioni e valutazioni tecniche diverse a monte che richiedono conoscenza profonda della tecnologia di fabbricazione: in presenza costante di acqua, la <strong>vetroresina non si ossida, non si corrode, \u00e8 inalterabile nel tempo<\/strong>, non teme le intemperie ed <strong>\u00e8 quindi<\/strong> <strong>esente da manutenzione<\/strong>. \u00c8 inoltre <strong>pi\u00f9 leggera dell\u2019acciaio<\/strong> e, in caso di danno accidentale, \u00e8 facilmente riparabile a nuovo.<\/p>\n\n\n\n<p>Nel caso di <strong>componenti realizzati da stampo<\/strong>, la consistenza strutturale viene conferita al pezzo mediante stratificazione successiva di tessuto di vetro chiamato in gergo <strong>\u201cmat\u201d<\/strong>, imbevuto di resina. Una volta catalizzata, la resina fa corpo unico con i vari strati di mat. Si ottiene quindi <strong>un pezzo strutturalmente robusto e dalla superficie omogenea<\/strong> e continua.<\/p>\n\n\n\n<p>La protezione esterna viene realizzata mediante una verniciatura direttamente in stampo con <strong>gelcoat resistente ai raggi UV<\/strong>, mentre l\u2019impermeabilizzazione all\u2019acqua dall\u2019interno \u00e8 ottenuta mediante apposizione di gelcoat paraffinato che impedisce qualsiasi fenomeno di osmosi.<\/p>\n\n\n\n<p>Nei pezzi pi\u00f9 complessi e delicati, viene posta particolare attenzione all\u2019orientamento delle fibre di vetro, in modo tale che queste possano meglio <strong>sopportare e distribuire i carichi statici e dinamici <\/strong>cui il pezzo \u00e8 sottoposto.<\/p>\n\n\n\n<br>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"has-text-align-center wp-block-heading\"><strong><a href=\"https:\/\/www.mitacoolingtechnologies.com\/contatti\/\" class=\"ek-link\">>> Richiedi maggiori informazioni sulle torri di raffreddamento in vetroresina<\/a><\/strong><\/h3>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<br>\n\n\n\n<h2 class=\"wp-block-heading\">Vetroresina e profili pultrusi<\/h2>\n\n\n\n<p>Nel caso di profili strutturali pultrusi, invece, questi vengono prodotti da trafila dedicata in base al disegno del profilo stesso, a monte della quale l\u2019impasto di resina catalizzata si amalgama con la fibra di vetro. Caratteristica peculiare del profilo pultruso \u00e8 <strong>l\u2019utilizzo di vetro a fibra continua<\/strong>: questo per garantire al profilo medesimo quella <strong>resistenza meccanica e strutturale<\/strong> che generalmente viene richiesta a questo tipo di prodotto.<\/p>\n\n\n\n<p>Anche i profili pultrusi possono essere <strong>protetti nei confronti dei raggi UV<\/strong> e contro il rischio di osmosi con l\u2019acqua.<\/p>\n\n\n\n<br>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3 class=\"has-text-align-center wp-block-heading\"><strong><a href=\"https:\/\/www.mitacoolingtechnologies.com\/contatti\/\" class=\"ek-link\">>> Chiedi informazioni sulle nostre tecnologie di raffreddamento<\/a><\/strong><\/h3>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<br>\n\n\n\n<h2 class=\"wp-block-heading\">Perch\u00e9 costruire torri di raffreddamento in vetroresina: conclusioni<\/h2>\n\n\n\n<p>Perch\u00e9, quindi, alcuni costruttori tra cui <strong>MITA Cooling Technologies e TORRAVAL Cooling<\/strong>, societ\u00e0 spagnola del Gruppo, da sempre prediligono questa tecnologia rispetto ad altre meno costose?<\/p>\n\n\n\n<p>Anche se la risposta sembra banale, la ragione non \u00e8 di convenienza fine a se stessa: \u00e8 bens\u00ec legata alla scelta di proporre al mercato <strong>un prodotto di<\/strong> <strong>qualit\u00e0 superiore<\/strong>. Il fine \u00e8 di ridurre, se non eliminare alla radice, qualsiasi problema di corrosione e conseguente <strong>manutenzione<\/strong> da parte dell\u2019utilizzatore.<\/p>\n\n\n\n<p>A fronte di un costo certamente pi\u00f9 elevato, l\u2019adozione di componenti in vetroresina permette al cliente una maggiore \u201cflessibilit\u00e0\u201d in presenza di <strong>acque anche chimicamente aggressive<\/strong>, rimanendo su una costruzione standard dal costo competitivo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many manufacturers of open and closed circuit cooling towers, even large ones, continue to use fibreglass: Giorgio Lorenzetti explains why.<\/p>\n","protected":false},"author":4,"featured_media":19130,"template":"","categorie-articoli-tecnici":[209],"class_list":["post-9213","articoli-tecnici","type-articoli-tecnici","status-publish","has-post-thumbnail","hentry","categorie-articoli-tecnici-evaporative-cooling"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fibreglass Cooling Towers: the amazing Advantages - MITA<\/title>\n<meta name=\"description\" content=\"Best Material for Evaporative Cooling? 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