{"id":3058,"date":"2020-11-24T13:46:46","date_gmt":"2020-11-24T12:46:46","guid":{"rendered":"https:\/\/termocent.com\/2020\/11\/24\/gas-retention-time-study\/"},"modified":"2025-04-05T21:50:27","modified_gmt":"2025-04-05T19:50:27","slug":"gas-retention-time-study","status":"publish","type":"post","link":"https:\/\/termocent.com\/en\/blog\/gas-retention-time-study\/","title":{"rendered":"Gas retention time study"},"content":{"rendered":"\n<p>Some rooms, such as a server room, must have particularly stringent safety and fire protection conditions.<\/p>\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft size-large is-resized\"><img decoding=\"async\" class=\"wp-image-1516\" src=\"https:\/\/termocent.com\/wp-content\/uploads\/2020\/11\/Obraz1.jpg\" alt=\"Gas retention time study\" width=\"435\" height=\"286\" srcset=\"https:\/\/termocent.com\/wp-content\/uploads\/2020\/11\/Obraz1.jpg 785w, https:\/\/termocent.com\/wp-content\/uploads\/2020\/11\/Obraz1-300x198.jpg 300w, https:\/\/termocent.com\/wp-content\/uploads\/2020\/11\/Obraz1-768x506.jpg 768w\" sizes=\"(max-width: 435px) 100vw, 435px\" \/><\/figure>\n<\/div>\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Spis tre\u015bci<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/termocent.com\/en\/blog\/gas-retention-time-study\/#Extinguishing_gases\" >Extinguishing gases<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/termocent.com\/en\/blog\/gas-retention-time-study\/#Gas_retention_time\" >Gas retention time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/termocent.com\/en\/blog\/gas-retention-time-study\/#Methods_for_testing_gas_retention_time\" >Methods for testing gas retention time<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/termocent.com\/en\/blog\/gas-retention-time-study\/#Are_you_interested_in_investigating_gas_retention_time\" >Are you interested in investigating gas retention time?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Extinguishing_gases\"><\/span><strong><span style=\"color: #e22526;\">Extinguishing gases<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>An effective and safe, as it involves low losses, method of extinguishing fires is the use of extinguishing gases. An additional advantage of this technique is the significantly reduced time required to resume operation of protected facilities and the lack of negative impact on <a href=\"https:\/\/termocent.com\/przeciwpozarowa-kontrola-instalacji-elektrycznej-2\/\">electrical equipment<\/a>. In the case of server rooms, this is crucial.  <\/p>\n\n<p>The <strong>extinguishing gases<\/strong> in use today can be classified according to the following division:<\/p>\n<ul>\n<li>Inert gases (e.g.: IG-100 [nitrogen], IG-01 [argon] and their mixtures IG-541, IG-55);<\/li>\n<li>Halogenated hydrocarbons (HFC-236fa, HFC-227ca, FK-5-1-12, NOVEC 1230);<\/li>\n<li>carbon dioxide (<sub>CO2<\/sub>);<\/li>\n<\/ul>\n<p>They are used primarily in Fixed Fire Extinguishing Systems (SUGs).<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Gas_retention_time\"><\/span><strong><span style=\"color: #e22526;\">Gas retention time<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>The effectiveness of the extinguishing system used is determined by the <strong>retention time<\/strong> of the <strong>gas<\/strong>. The retention time is called the holding time, that is, the expected time during which the extinguishing concentration in the protected space does not fall below a certain level. This time must not be less than 10 minutes. Its value depends largely on the tightness of the room and the density of the extinguishing gas used.   <\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Methods_for_testing_gas_retention_time\"><\/span><strong><span style=\"color: #e22526;\">Methods for testing gas retention time<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>There are two methods for testing gas retention time:<\/p>\n<ul>\n<li>actual <strong>measurement of the change in the value of gas concentration<\/strong> over time by the discharge of the extinguishing agent;<\/li>\n<li>execution of <a href=\"https:\/\/termocent.com\/badanie-szczelnosci-powietrznej-budynkow\/\"><strong>air tightness test of the room<\/strong><\/a> Using a supply door.<\/li>\n<\/ul>\n<p>The second method is by far more efficient, safer and, above all, cheaper, requiring no consumption of extinguishing agent and no refilling. With the help of a leak test and subsequent analysis of gas discharge models, we can determine the expected retention time. <\/p>\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-large is-resized\"><img decoding=\"async\" class=\"wp-image-1365\" src=\"https:\/\/termocent.com\/wp-content\/uploads\/2020\/07\/blower_door_termocent.jpg\" alt=\"blower_door_test_termocent\" width=\"453\" height=\"302\"\/><\/figure>\n<\/div>\n\n<p>Method of testing the airtightness of rooms by the method of <strong><em>blower door test<\/em><\/strong> for the purpose of obtaining retention time is the same as for testing buildings to reduce heat loss. A special <strong>supply door<\/strong> is installed, which, with the help of a fan, creates a pressure difference. The flow rate of the passing air is then analyzed.  <\/p>\n<p>The known <strong>value of the pressure inside and outside<\/strong> the room allows you to determine the total size of the leakage. Leakage tests should be carried out in accordance with EN ISO 9972:2015, and the results obtained should be interpreted in accordance with the applicable standards: NFPA 2001, ISO 14520, EN 15004 and VdS. <\/p>\n\n<p>If the size of the leak is found to be too large to maintain the specified minimum concentration of the extinguishing gas at a given retention time, the escape routes of the extinguishing agent should be located and sealed.<\/p>\n<p><strong>Leak detection<\/strong> is not such a simple matter. In addition to the leakage test itself, TERMOCENT also performs a test to locate significant air leaks. Such detection can be carried out in several ways: with <strong>a thermal imaging camera<\/strong> when a vacuum is created, with <strong>ultrasound<\/strong> or with <strong>a smoke generator<\/strong>. The use of <a href=\"https:\/\/termocent.com\/jakosc-pomiarow-termowizyjnych-kamera-flir-t-1020\/\">thermal im<\/a> aging is the most efficient and less time-consuming approach. However, it involves temperature requirements, i.e., a necessary temperature difference of at least 12\u1d52C between the two sides of the partition under investigation.     <\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Are_you_interested_in_investigating_gas_retention_time\"><\/span><strong><span style=\"color: #e22526;\">Are you interested in investigating gas retention time?<\/span><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>The company TERMOCENT offers measurements are performed by specialists in the relevant fields. This is confirmed by the qualifications held: <strong>ISO 18436-7<\/strong> (thermal imaging) and <strong>ISO 18436-8<\/strong> (leak localization &#8220;ultrasound&#8221;). <\/p>\n<p>TERMOCENT uses top-of-the-line equipment to ensure reliable, high-quality measurements. The best commercially available FLIR T1020 thermal imaging camera, smoke markers, UE Systems ultrasonic measurement equipment and professional RETROTEC brand leak test equipment from an authorized distributor are used for testing.   <\/p>\n\n<p style=\"text-align: center;\"><strong>Want to know more?<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>Call 530 105 398 or email <a href=\"mailto:kontakt@termocent.com\">kontakt@termocent.com<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Extinguishing gases Gas retention time Methods for testing gas retention time Are you interested in investigating gas retention time?<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3058","post","type-post","status-publish","format-standard","hentry","category-bez-kategorii"],"acf":[],"permalink_manager":null,"_links":{"self":[{"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/posts\/3058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/comments?post=3058"}],"version-history":[{"count":0,"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/posts\/3058\/revisions"}],"wp:attachment":[{"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/media?parent=3058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/categories?post=3058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/termocent.com\/en\/wp-json\/wp\/v2\/tags?post=3058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}