{"id":714,"date":"2012-11-07T10:12:00","date_gmt":"2012-11-07T09:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/from_rocket_fuel_to_clean_cars\/"},"modified":"2026-10-08T00:31:27","modified_gmt":"2026-10-07T22:31:27","slug":"from_rocket_fuel_to_clean_cars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/from_rocket_fuel_to_clean_cars\/","title":{"rendered":"Fr\u00e5n raketbr\u00e4nsle till milj\u00f6v\u00e4nliga bilar"},"content":{"rendered":"<div class=\"lede\">\n<p>V\u00e4te, den l\u00e4ttaste av alla gaser, \u00e4r det vanligaste grund\u00e4mnet i universum. Det \u00e4r extremt l\u00e4ttant\u00e4ndligt i n\u00e4rvaro av syre. V\u00e4te, som anv\u00e4nds i Europas Ariane 5-b\u00e4rraketer, \u00e4r ett utm\u00e4rkt raketbr\u00e4nsle, men det \u00e4r mycket sv\u00e5rt att lagra. Det m\u00e5ste f\u00f6rvaras i dubbelv\u00e4ggiga tankar vid mycket l\u00e5ga temperaturer och sedan matas till raketmotorerna genom t\u00e4tt f\u00f6rseglade r\u00f6r.<\/p>\n<\/div>\n<p>De senaste framstegen fr\u00e5n ett \u00f6sterrikiskt f\u00f6retag tyder p\u00e5 att v\u00e4tgas \u00e4ven kan bli det fr\u00e4msta br\u00e4nslet f\u00f6r framtidens v\u00e4gtransporter och d\u00e4rmed l\u00f6sa problemet med hur man ska skapa milj\u00f6v\u00e4nliga bilar. I samarbete med den tyska biltillverkaren BMW har detta f\u00f6retag anpassat raketteknik f\u00f6r att utveckla v\u00e4tgasbeh\u00e5llare som \u00e4r tillr\u00e4ckligt sm\u00e5 f\u00f6r att f\u00e5 plats i bagageutrymmet p\u00e5 en sedan. \u00c5r 2007 ledde detta till lanseringen av en serietillverkad bil, BMW Hydrogen 7, som kan drivas med antingen v\u00e4tgas eller bensin. I praktiken \u00e4r den enda utsl\u00e4ppsprodukten fr\u00e5n bilen ofarlig vatten\u00e5nga!<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"Magna Steyr Aerospace\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/10\/Hydrogen_car_fuel_tank2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2012\/10\/hydrogen_car_fuel_tank2\/18250360-2-eng-GB\/Hydrogen_car_fuel_tank.jpg\" alt=\"Hydrogen car fuel tank\"><figcaption>Br\u00e4nsletank f\u00f6r v\u00e4tgasbil<\/figcaption><\/figure>\n<p>En av de st\u00f6rsta utmaningarna var att konstruera br\u00e4nsletanken. F\u00f6r att kunna lagras i flytande form m\u00e5ste v\u00e4tgas h\u00e5llas vid \u2013253 \u00b0C. Ist\u00e4llet f\u00f6r att anv\u00e4nda kontinuerlig kylning lagrar BMW Hydrogen 7-bilarna 114 liter flytande v\u00e4tgas i v\u00e4lisolerade tankar. Tankarnas isolering, som motsvarar ett 17 m tjockt lager av styrenplast, kan h\u00e5lla v\u00e4tgasen kall i n\u00e4stan tv\u00e5 veckor.<\/p>\n<p>Det finns fortfarande n\u00e5gra problem som m\u00e5ste l\u00f6sas innan v\u00e4tgasdrivna bilar blir vanliga. Ett av dem \u00e4r bristen p\u00e5 tankstationer. Ett annat \u00e4r f\u00f6rlusten av flytande v\u00e4tgas n\u00e4r den v\u00e4rms upp och l\u00e5ngsamt avdunstar som gas. En f\u00f6rare som till exempel l\u00e4mnar bilen p\u00e5 flygplatsen i tv\u00e5 veckor skulle \u00e5terv\u00e4nda till en tom br\u00e4nsletank. Det finns dock tydliga tecken p\u00e5 att rena bilar som drivs med v\u00e4tgas \u00e4r framtiden f\u00f6r utsl\u00e4ppsfri bilk\u00f6rning.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hydrogen, the lightest of all gases, is the most common element in the Universe. It is extremely easy to burn, if oxygen is present. Used in Europe\u2019s Ariane 5 launchers, [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2012\/10\/liquid_hydrogen-powered_combustion_engine2\/17879995-2-eng-GB\/Liquid_hydrogen-powered_combustion_engine.jpg","esa_banner_description":"Liquid hydrogen-powered combustion engine","esa_banner_credit":"BMW\/Magna Steyr Aerospace","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2012\/10\/Liquid_hydrogen-powered_combustion_engine2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,54,40],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-714","post","type-post","status-publish","format-standard","hentry","category-learn","category-space-technologies-on-earth","category-technology"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=714"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/714\/revisions"}],"predecessor-version":[{"id":4644,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/714\/revisions\/4644"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=714"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=714"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=714"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=714"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=714"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=714"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=714"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}