{"id":32661,"date":"2019-10-31T21:48:16","date_gmt":"2019-10-31T18:48:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/chillernoe-ohlazhdenie-tsod-kakoj-teplonositel-vybrat\/"},"modified":"2019-10-31T21:48:16","modified_gmt":"2019-10-31T18:48:16","slug":"chillernoe-ohlazhdenie-tsod-kakoj-teplonositel-vybrat","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/administrirovanie\/chillernoe-ohlazhdenie-tsod-kakoj-teplonositel-vybrat","title":{"rendered":"H\u0171t\u00e9si rendszerek az adatk\u00f6zpontokban: melyik h\u0171t\u0151k\u00f6zeg a legjobb v\u00e1laszt\u00e1s?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Adatk\u00f6zpontok h\u0171t\u00e9s\u00e9re \u00e1ltal\u00e1ban k\u00f6zpontos\u00edtott, t\u00f6bbz\u00f3n\u00e1s rendszereket telep\u00edtenek v\u00edzh\u0171t\u0151 g\u00e9pekkel (chiller). Ezek hat\u00e9konyabbak, mint a h\u0171t\u0151g\u00e1zos kl\u00edmaberendez\u00e9sek, mert a k\u00fcls\u0151 \u00e9s bels\u0151 egys\u00e9gek k\u00f6z\u00f6tt cirkul\u00e1l\u00f3 h\u0171t\u0151k\u00f6zeg nem v\u00e1lt g\u00e1z halmaz\u00e1llapot\u00fav\u00e1, \u00e9s a chiller kompresszor-kondenz\u00e1l\u00f3 egys\u00e9ge csak akkor kapcsol be, ha a h\u0151m\u00e9rs\u00e9klet egy adott szint f\u00f6l\u00e9 emelkedik. Az egyik legfontosabb k\u00e9rd\u00e9s a chiller rendszer tervez\u00e9se sor\u00e1n: melyik h\u0171t\u0151k\u00f6zeg a legjobb v\u00e1laszt\u00e1s? Ez lehet v\u00edz vagy v\u00edzb\u00e1zis\u00fa t\u00f6bbatomos alkohol oldat - propil\u00e9n-glikol vagy etil\u00e9n-glikol. Pr\u00f3b\u00e1ljuk meg meg\u00e9rteni mindk\u00e9t lehet\u0151s\u00e9g el\u0151nyeit \u00e9s h\u00e1tr\u00e1nyait.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Fizika \u00e9s k\u00e9mia<\/h2>\n<p><\/p>\n<p>A fizikai tulajdons\u00e1gok (h\u0151kapacit\u00e1s, s\u0171r\u0171s\u00e9g, kinematikai viszkozit\u00e1s) szempontj\u00e1b\u00f3l a v\u00edz tekinthet\u0151 optim\u00e1lis h\u0171t\u0151k\u00f6zegnek. R\u00e1ad\u00e1sul biztons\u00e1gosan le lehet engedni a talajra vagy a csatorn\u00e1ba. Sajnos, a mi sz\u00e9less\u00e9gi k\u00f6r\u00fcnkben a vizet csak bels\u0151 haszn\u00e1latra alkalmazz\u00e1k, mivel 0 \u00b0C-on megfagy. Ekkor a h\u0171t\u0151k\u00f6zeg s\u0171r\u0171s\u00e9ge cs\u00f6kken, m\u00edg a t\u00e9rfogata n\u0151. A folyamat nem egyenletesen zajlik, \u00e9s ezt a t\u00e1gul\u00e1si tart\u00e1ly seg\u00edts\u00e9g\u00e9vel nem lehet kompenz\u00e1lni. A megfagyott r\u00e9szeket elk\u00fcl\u00f6n\u00edtik, a statikus nyom\u00e1s n\u00f6vekszik a cs\u00f6vek fal\u00e1n, \u00e9s v\u00e9g\u00fcl reped\u00e9s t\u00f6rt\u00e9nik. A t\u00f6bbatomos alkohol oldatok mentesek ezekt\u0151l a h\u00e1tr\u00e1nyokt\u00f3l. Sokkal alacsonyabb h\u0151m\u00e9rs\u00e9kleten fagyosodnak meg, an\u00e9lk\u00fcl hogy lok\u00e1lis fagy\u00e1si z\u00f3n\u00e1k alakuln\u00e1nak ki. K\u00e1l\u00e1szkod\u00e1skor a s\u0171r\u0171s\u00e9g\u00fck sokkal kev\u00e9sb\u00e9 cs\u00f6kken, mint a v\u00edz j\u00e9gg\u00e9 alakul\u00e1sa sor\u00e1n, \u00edgy a t\u00e9rfogatuk nem n\u0151 olyan m\u00e9rt\u00e9kben - m\u00e9g a megfagyott glikol oldatok sem k\u00e1ros\u00edtj\u00e1k a cs\u00f6veket.<\/p>\n<p><\/p>\n<p>A megrendel\u0151k gyakran v\u00e1lasztj\u00e1k a propil\u00e9n-glikolt, mert nem toxikus. Val\u00f3j\u00e1ban ez az E1520 enged\u00e9lyezett \u00e9lelmiszer-adal\u00e9kanyag, amelyet a s\u00fct\u0151iparban \u00e9s egy\u00e9b \u00e9lelmiszerekben haszn\u00e1lnak, mint nedvess\u00e9gtart\u00f3 \u00fcgyn\u00f6k\u00f6t. Kozmetikai term\u00e9kekben \u00e9s sok m\u00e1s ter\u00fcleten is alkalmazz\u00e1k. Ha a rendszert propil\u00e9n-glikol vizes oldat\u00e1val t\u00f6ltik fel, k\u00fcl\u00f6nleges \u00f3vint\u00e9zked\u00e9sek nem sz\u00fcks\u00e9gesek: a megrendel\u0151nek csak egy plusz tart\u00e1lyra lesz sz\u00fcks\u00e9ge a sziv\u00e1rg\u00e1sok kompenz\u00e1l\u00e1s\u00e1ra. Az etil\u00e9n-glikollal val\u00f3 munka nehezebb \u2013 ez a vegy\u00fclet m\u00e9rs\u00e9kelten toxikus (harmadik vesz\u00e9lyess\u00e9gi oszt\u00e1ly). A leveg\u0151ben l\u00e9v\u0151 maxim\u00e1lisan megengedett koncentr\u00e1ci\u00f3ja 5 mg\/m3, de az alacsony volatilit\u00e1s miatt norm\u00e1l h\u0151m\u00e9rs\u00e9kleten a sokatomos alkohol g\u0151zeivel t\u00f6rt\u00e9n\u0151 hosszabb idej\u0171 l\u00e9gz\u00e9s eset\u00e9n lehet m\u00e9rgez\u00e9s.<\/p>\n<p><\/p>\n<p>A szennyv\u00edz kezel\u00e9se a legrosszabb: a v\u00edz \u00e9s a propil\u00e9n-glikol nem ig\u00e9nyel kidob\u00e1st, de az etil\u00e9n-glikol koncentr\u00e1ci\u00f3nak nem szabad meghaladnia az 1 mg\/l-t a k\u00f6zhaszn\u00e1lat\u00fa v\u00edztestekben. Ez\u00e9rt az adatk\u00f6zpontok tulajdonosainak k\u00fcl\u00f6nleges leereszt\u0151 rendszereket, elszigetelt t\u00e1rol\u00f3kat \u00e9s\/vagy h\u00edg\u00edt\u00f3 rendszert kell be\u00e9p\u00edteni\u00fck, hogy a h\u0151hordoz\u00f3t ne lehessen egyszer\u0171en leengedni a csatorn\u00e1ba. A v\u00edz mennyis\u00e9ge a h\u00edg\u00edt\u00e1shoz sz\u00e1zszorosa a h\u0151hordoz\u00f3 mennyis\u00e9g\u00e9nek, \u00e9s rendk\u00edv\u00fcl nem k\u00edv\u00e1natos a talajra vagy a padl\u00f3ra \u00f6nteni \u2013 a toxikus sokatomos alkoholt nagy mennyis\u00e9g\u0171 v\u00edzzel kell el\u00f6bl\u00edteni. Mindazon\u00e1ltal az etil\u00e9n-glikolt a modern l\u00e9gkondicion\u00e1l\u00f3 rendszerekben is haszn\u00e1lj\u00e1k. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/kompaniya\/data-centers\/\"   title=\"adatk\u00f6zpontok\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4646\">adatk\u00f6zpontok<\/a> ez is teljesen biztons\u00e1gos, ha minden sz\u00fcks\u00e9ges \u00f3vint\u00e9zked\u00e9st betartanak.<\/p>\n<p><\/p>\n<h2>Gazdas\u00e1g<\/h2>\n<p><\/p>\n<p>A vizet szinte ingyenesnek tekinthetj\u00fck a t\u00f6bbsz\u00f6r\u00f6s alkoholok alap\u00fa h\u0171t\u0151folyad\u00e9kok \u00e1r\u00e1hoz k\u00e9pest. A propil\u00e9nglikol v\u00edzes oldata a chiller-fan coil rendszerhez meglehet\u0151sen dr\u00e1ga - nagyj\u00e1b\u00f3l 80 rubelt cost literenk\u00e9nt. Figyelembe kell venni, hogy a h\u0171t\u0151folyad\u00e9k id\u0151szakos cser\u00e9je jelent\u0151s k\u00f6lts\u00e9geket von maga ut\u00e1n. Az etil\u00e9n-glikol v\u00edzes oldat\u00e1nak \u00e1ra majdnem fele annyi, de ezt is bele kell kalkul\u00e1lni a kezel\u00e9s k\u00f6lts\u00e9geibe, amelyek viszont szint\u00e9n viszonylag alacsonyak. Vannak \u00e1rnyalatok, amelyek a viszkozit\u00e1ssal \u00e9s a h\u0151kapacit\u00e1ssal kapcsolatosak: a propil\u00e9nglikol alap\u00fa h\u0171t\u0151folyad\u00e9k magasabb nyom\u00e1st ig\u00e9nyel a keringet\u0151 szivatty\u00fa \u00e1ltal l\u00e9trehozott nyom\u00e1sra. \u00d6sszess\u00e9g\u00e9ben az etil\u00e9n-glikollal m\u0171k\u00f6d\u0151 rendszer \u00fczemeltet\u00e9si k\u00f6lts\u00e9gei l\u00e9nyegesen alacsonyabbak, ez\u00e9rt ezt a megold\u00e1st sokan v\u00e1lasztj\u00e1k, a h\u0171t\u0151folyad\u00e9k n\u00e9mi toxicit\u00e1sa ellen\u00e9re. Egy m\u00e1sik lehet\u0151s\u00e9g a k\u00f6lts\u00e9gek cs\u00f6kkent\u00e9s\u00e9re - a k\u00e9tk\u00f6r\u00f6s rendszer haszn\u00e1lata h\u0151cser\u00e9l\u0151vel, ahol a bels\u0151 helys\u00e9gekben, pozit\u00edv h\u0151m\u00e9rs\u00e9kleten, norm\u00e1l v\u00edz kering, m\u00edg a kinti h\u0151 elt\u00e1vol\u00edt\u00e1s\u00e1t fagy\u00e1ll\u00f3 glikolos oldat v\u00e9gzi. Az ilyen rendszer hat\u00e1sfoka valamivel alacsonyabb, de az \u00e9rt\u00e9kes h\u0171t\u0151folyad\u00e9k mennyis\u00e9ge jelent\u0151sen cs\u00f6kken.<\/p>\n<p><\/p>\n<h2>\u00d6sszegz\u00e9s<\/h2>\n<p><\/p>\n<p>Val\u00f3j\u00e1ban az \u00f6sszes felsorolt h\u0171t\u0151rendszer (kiv\u00e9ve a tiszt\u00e1n v\u00edzb\u00e1zis\u00fa rendszereket, amelyek a mi sz\u00e9less\u00e9gi k\u00f6r\u00fcnkben nem lehets\u00e9gesek) jogosult a l\u00e9tez\u00e9sre. A v\u00e1laszt\u00e1s a teljes tulajdonl\u00e1si k\u00f6lts\u00e9gt\u0151l f\u00fcgg, amelyet minden egyes esetben m\u00e1r a tervez\u00e9si szakaszban sz\u00e1m\u00edt\u00e1sba kell venni. Az egyetlen dolog, amit semmik\u00e9ppen sem szabad tenni: megv\u00e1ltoztatni a koncepci\u00f3t, amikor a projekt m\u00e1r szinte k\u00e9sz. K\u00fcl\u00f6n\u00f6sen nem szabad a h\u0171t\u0151folyad\u00e9kot megv\u00e1ltoztatni, amikor m\u00e1r zajlik a j\u00f6v\u0151beli adatk\u00f6zpont m\u00e9rn\u00f6ki rendszereinek telep\u00edt\u00e9se. A k\u00e9rd\u00e9sek \u00e9s v\u00edv\u00f3d\u00e1sok komoly k\u00f6lts\u00e9geket fognak okozni, ez\u00e9rt a v\u00e1laszt\u00e1sr\u00f3l egyszer \u00e9s mindenkorra d\u00f6nteni kell.<\/p>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/delta\/blog\/450006\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043b\u044f \u043a\u043e\u043d\u0434\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0446\u0435\u043d\u0442\u0440\u0430\u0445 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u044e\u0442 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0435 \u043c\u043d\u043e\u0433\u043e\u0437\u043e\u043d\u0430\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0441 \u0432\u043e\u0434\u043e\u043e\u0445\u043b\u0430\u0436\u0434\u0430\u044e\u0449\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 (\u0447\u0438\u043b\u043b\u0435\u0440\u0430\u043c\u0438). \u041e\u043d\u0438 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u0435\u0435 \u0444\u0440\u0435\u043e\u043d\u043e\u0432\u044b\u0445 \u043a\u043e\u043d\u0434\u0438\u0446\u0438\u043e\u043d\u0435\u0440\u043e\u0432, \u043f\u043e\u0442\u043e\u043c\u0443 \u0447\u0442\u043e \u0446\u0438\u0440\u043a\u0443\u043b\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u043c\u0435\u0436\u0434\u0443 \u0432\u043d\u0435\u0448\u043d\u0438\u043c\u0438 \u0438 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u043c\u0438 \u0431\u043b\u043e\u043a\u0430\u043c\u0438 \u0442\u0435\u043f\u043b\u043e\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c \u043d\u0435 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\u0432\u043e\u043f\u0440\u043e\u0441\u043e\u0432 \u043f\u0440\u0438 \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-32661","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043b\u044f \u043a\u043e\u043d\u0434\u0438\u0446\u0438\u043e\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u0446\u0435\u043d\u0442\u0440\u0430\u0445 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0447\u0430\u0449\u0435 \u0432\u0441\u0435\u0433\u043e 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