{"id":4178,"date":"2023-01-24T07:39:49","date_gmt":"2023-01-24T02:09:49","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=4178"},"modified":"2025-03-26T22:19:04","modified_gmt":"2025-03-26T16:49:04","slug":"air-independent-propulsion-aip-system","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/air-independent-propulsion-aip-system\/","title":{"rendered":"Air Independent Propulsion (AIP) System"},"content":{"rendered":"<h2><strong>About Submarines:<\/strong><\/h2>\n<ul>\n<li><strong>Conventional or Diesel-electric submarine: <\/strong>They need atmospheric oxygen to run the diesel generator which in turn charges the batteries.<\/li>\n<li><strong>Nuclear Submarine<\/strong>: It is a submarine powered by a nuclear reactor, but not necessarily nuclear-armed. They have considerable performance advantages over conventional submarines.<\/li>\n<\/ul>\n<h3><strong>What is an AIP?<\/strong><\/h3>\n<ul>\n<li>With the emergence of submarines, there was a <strong>problem finding satisfactory forms of propulsion underwater.<\/strong><\/li>\n<li>AIP is mostly implemented as an <strong>auxiliary source, with the traditional diesel engine handling surface propulsion<\/strong>. Most of these systems generate electricity, which in turn drives an electric motor for propulsion or recharges the boat\u2019s batteries.<\/li>\n<li><strong>AIP allows longer submergence<\/strong> than a conventionally propelled submarine. A typical conventional power plant provides 3 megawatts maximum, and an AIP source around 10 per cent of that. A nuclear submarine\u2019s propulsion plant is much greater than 20 megawatts.<\/li>\n<\/ul>\n<h3><strong>Key features of AIP System<\/strong><\/h3>\n<ul>\n<li>It <strong>allows the submarines to stay for longer hours in water<\/strong>. The submarines need to come to the surface of the water to charge their batteries. This is reduced by AIP System.<\/li>\n<li>It <strong>decreases the noise levels made by the submarines<\/strong>. This makes it hard to detect the submarines.<\/li>\n<\/ul>\n<h3><strong>Types of AIP<\/strong><\/h3>\n<ul>\n<li>Open-cycle systems<\/li>\n<li>Closed-cycle diesel engines<\/li>\n<li>Closed-cycle steam turbines<\/li>\n<li>Stirling cycle engines<\/li>\n<li>Fuel cells<\/li>\n<li><strong>DRDO is using the fuel cells-based AIP System<\/strong>. It is unique as the <strong>hydrogen is generated onboard. <\/strong>The plant was operated in endurance mode and max power mode as per the user requirements. The system is being developed by Naval Materials Research Laboratory (NMRL) of DRDO.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3>Q1) Which country has the most submarines?<\/h3>\n<p>The country with the most number of submarines in the entire world is China followed by Russia and USA<i>.<\/i><\/p>\n<p><strong>Source:\u00a0<\/strong><a href=\"https:\/\/www.pib.gov.in\/PressReleasePage.aspx?PRID=1893096\" target=\"_blank\" rel=\"nofollow noopener\"><u>Aatmanirbhar Bharat: DRDO\u2019s Fuel Cell-based Air Independent Propulsion system to soon be fitted onboard INS Kalvari, significantly enhancing its submerged endurance<\/u><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Air Independent Propulsion (AIP) System allows longer submergence than a conventionally propelled submarine.<\/p>\n","protected":false},"author":5,"featured_media":4179,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-4178","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/4178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=4178"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/4178\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/4179"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=4178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=4178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=4178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}