{"id":4685,"date":"2025-05-08T11:12:17","date_gmt":"2025-05-08T09:12:17","guid":{"rendered":"https:\/\/www.solites.de\/focal-points\/large-heat-accumulator\/"},"modified":"2025-08-06T15:51:41","modified_gmt":"2025-08-06T13:51:41","slug":"large-heat-storage","status":"publish","type":"page","link":"https:\/\/www.solites.de\/en\/focus\/large-heat-storage\/","title":{"rendered":"Large heat storages"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:140px;--awb-padding-bottom:140px;--awb-background-color:var(--awb-color3);--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-padding-right-small:10px;--awb-padding-left-small:10px;--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:50px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:16px;--awb-spacing-left-large:7.68%;--awb-width-medium:50%;--awb-order-medium:0;--awb-spacing-right-medium:7.68%;--awb-spacing-left-medium:7.68%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-margin-bottom-small:10px;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element\" style=\"--awb-margin-bottom:10px;--awb-max-width:100px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img decoding=\"async\" width=\"1200\" height=\"1200\" src=\"https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02.png\" data-orig-src=\"http:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02.png\" alt class=\"lazyload img-responsive wp-image-4397\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%271200%27%20height%3D%271200%27%20viewBox%3D%270%200%201200%201200%27%3E%3Crect%20width%3D%271200%27%20height%3D%271200%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02-200x200.png 200w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02-400x400.png 400w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02-600x600.png 600w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02-800x800.png 800w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/05\/Solites_Icon_02.png 1200w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 640px) 100vw, 600px\" \/><\/span><\/div><div class=\"fusion-title title fusion-title-1 fusion-sep-none fusion-title-text fusion-title-size-two\" style=\"--awb-margin-top:0px;--awb-margin-top-small:10px;--awb-margin-right-small:0px;--awb-margin-bottom-small:10px;--awb-margin-left-small:0px;\"><h2 class=\"fusion-title-heading title-heading-right sm-text-align-left fusion-responsive-typography-calculated\" style=\"margin:0;--fontSize:46;line-height:1.12;\">Large heat storages enable the heat supply systems of the future.<\/h2><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-padding-right-small:10px;--awb-padding-left-small:10px;--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:160px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:40px;--awb-spacing-left-large:7.68%;--awb-width-medium:50%;--awb-order-medium:0;--awb-spacing-right-medium:7.68%;--awb-spacing-left-medium:7.68%;--awb-width-small:100%;--awb-order-small:0;--awb-margin-top-small:0px;--awb-spacing-right-small:1.92%;--awb-margin-bottom-small:0px;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\" style=\"--awb-text-transform:none;--awb-margin-top:5px;\"><p>A sustainable heat supply combines various climate-neutral resources such as solar thermal, geothermal, environmental heat and industrial waste heat.<\/p>\n<p>These are available in their characteristic courses throughout the day or the year.<\/p>\n<p>Large heat storages collect the heat and pass it on to consumers at the right time.<\/p>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:16px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:40px;--awb-spacing-left-large:3.84%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-margin-bottom-small:0px;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:15px;margin-bottom:15px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:1px;\"><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-padding-right-small:10px;--awb-padding-left-small:10px;--awb-bg-size:cover;--awb-width-large:50%;--awb-margin-top-large:16px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:40px;--awb-spacing-left-large:7.68%;--awb-width-medium:50%;--awb-order-medium:0;--awb-spacing-right-medium:7.68%;--awb-spacing-left-medium:7.68%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-margin-bottom-small:0px;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\" style=\"--awb-text-transform:none;--awb-margin-top:5px;\"><h3>Large heat storages as the key to the integrated system<\/h3>\n<p>A large heat storage is the module in a large <a href=\"https:\/\/www.solites.de\/en\/focus\/integrated-system-and-district-heating\/\">heat supply system<\/a> that connects all heat and electricity sources.<\/p>\n<\/div><div class=\"fusion-text fusion-text-3\" style=\"--awb-text-transform:none;--awb-margin-top:5px;\"><p>Depending on the size and function of the storage, different types &#8211; or even several &#8211; can be used:<\/p>\n<ul>\n<li><strong>Seasonal heat storages<\/strong>, for example, store heat from solar thermal in summer and supply it to the heating network in winter. <\/li>\n<li><strong>Buffer storages<\/strong>, for example, take up heat from waste heat sources and release it again after a few hours or days. <\/li>\n<li><strong>Multifunctional heat storages<\/strong> are so large and flexible in comparison to heat consumption that they can store heat both in the short and long term and transfer it back to the heat supply as required. Multifunctional heat storages connect sectors and ensure the supply. <\/li>\n<\/ul>\n<\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:5px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div><div class=\"fusion-image-element\" style=\"text-align:center;--awb-margin-right:0px;--awb-max-width:490px;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);--awb-filter:saturate(89%);--awb-filter-transition:filter 0.3s ease, -webkit-backdrop-filter 0.3s ease, backdrop-filter 0.3s ease;--awb-filter-hover:saturate(100%);\"><span class=\" fusion-imageframe imageframe-none imageframe-2 hover-type-none\"><img decoding=\"async\" width=\"808\" height=\"539\" src=\"https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3.jpg\" data-orig-src=\"https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3.jpg\" alt class=\"lazyload img-responsive wp-image-4418\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27808%27%20height%3D%27539%27%20viewBox%3D%270%200%20808%20539%27%3E%3Crect%20width%3D%27808%27%20height%3D%27539%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3-200x133.jpg 200w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3-400x267.jpg 400w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3-600x400.jpg 600w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3-800x534.jpg 800w, https:\/\/www.solites.de\/wp-content\/uploads\/2025\/08\/Multifunctional-TES_490x327-ratio-3.jpg 808w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 640px) 100vw, 600px\" \/><\/span><\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:10px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div><div class=\"fusion-text fusion-text-4\" style=\"--awb-text-transform:none;--awb-margin-top:5px;\"><p>The integration of the storage into the <a href=\"https:\/\/www.solites.de\/en\/focus\/integrated-system-and-district-heating\/\">overall system<\/a> is particularly important for efficient and therefore economical operation.<\/p>\n<\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:15px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div><div class=\"fusion-text fusion-text-5\" style=\"--awb-text-transform:none;\"><h4>Cost-effective construction methods<\/h4>\n<p>The larger the heat storages become, the more important cost-effective construction methods are. In order to save material, large multifunctional heat storages are partially or fully integrated into the ground and are therefore statically stabilized. <\/p>\n<p>These construction methods as underground heat storages are state of the art and are continuously being further developed in <a href=\"https:\/\/www.solites.de\/en\/services\/research\/\">research projects<\/a>.<\/p>\n<\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:45px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div><div style=\"text-align:center;\"><a class=\"fusion-button button-flat fusion-button-default-size button-custom fusion-button-default button-1 fusion-button-default-span fusion-button-default-type\" style=\"--awb-margin-top:0px;--awb-margin-right:0px;--awb-margin-bottom:0px;--awb-margin-left:0px;--awb-padding-top:15px;--awb-padding-right:15px;--awb-padding-bottom:15px;--awb-padding-left:15px;--button_accent_color:var(--awb-custom1);--button_border_color:var(--awb-color2);--button_accent_hover_color:var(--awb-color1);--button_border_hover_color:var(--awb-color3);--button_border_width-top:3px;--button_border_width-right:3px;--button_border_width-bottom:3px;--button_border_width-left:3px;--button_gradient_top_color:var(--awb-color1);--button_gradient_bottom_color:var(--awb-color1);--button_gradient_top_color_hover:var(--awb-custom2);--button_gradient_bottom_color_hover:var(--awb-custom2);\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"http:\/\/www.saisonalspeicher.de\"><span class=\"fusion-button-text awb-button__text awb-button__text--default\">www.saisonalspeicher.de &#8211; The knowledge portal for seasonal heat storages<\/span><\/a><\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:15px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-4 fusion_builder_column_1_2 1_2 fusion-flex-column\" style=\"--awb-padding-top:20px;--awb-padding-right:30px;--awb-padding-bottom:30px;--awb-padding-left:30px;--awb-padding-right-small:10px;--awb-padding-left-small:10px;--awb-bg-color:var(--awb-color3);--awb-bg-color-hover:var(--awb-color3);--awb-bg-size:cover;--awb-border-color:var(--awb-color2);--awb-border-bottom:1px;--awb-border-style:solid;--awb-width-large:50%;--awb-margin-top-large:16px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:50px;--awb-spacing-left-large:3.84%;--awb-width-medium:50%;--awb-order-medium:0;--awb-spacing-right-medium:7.68%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-6\" style=\"--awb-text-transform:none;--awb-margin-top:-15px;--awb-margin-right:10px;--awb-margin-left:10px;\"><h3>Leading the way in the development of large heat storages<\/h3>\n<p><strong>Solites is a know-how leader for construction methods, component designs, system integration and possible applications of large heat storages.<\/strong><\/p>\n<p>We are currently working on the further development of construction methods, new materials and the economic integration of multifunctional heat storages into overall systems.<br \/>\nThe aim is to develop storage technologies that meet the requirements of the district heating sector and achieve long lifetimes &#8211; in other words, multifunctional.<\/p>\n<\/div><div class=\"fusion-separator\" style=\"align-self: center;margin-left: auto;margin-right: auto;margin-top:5px;margin-bottom:5px;width:100%;max-width:70%;\"><div class=\"fusion-separator-border sep-single sep-solid\" style=\"--awb-height:20px;--awb-amount:20px;border-color:var(--awb-color2);border-top-width:0px;\"><\/div><\/div>\n<div class=\"fusion-text fusion-text-7\" style=\"--awb-text-transform:none;--awb-margin-right:10px;--awb-margin-left:10px;\"><h4>30 years of experience with large heat storages<\/h4>\n<p>Solites experts have been working in the field of large heat storages since 1995. <strong>The scientific and technical support of pilot projects for seasonal heat storages<\/strong> formed the basis for further research. The team developed projects, used simulations to work out the optimum system integration and dimensioning, accompanied the structural implementation and then measured the systems for several years, i.e. compared the actual temperatures, pressures and conditions in the storage facility with the simulations.  <\/p>\n<p>The<strong> German working group on long-term heat storages<\/strong> has been in existence since 1999 under the leadership of <a href=\"https:\/\/www.solites.de\/en\/team\/#mangold\">Dirk Mangold<\/a>. The working group is now based at the <a href=\"https:\/\/www.agfw.de\/\" target=\"_blank\" rel=\"noopener\">district heating association AGFW<\/a> and currently comprises around 50 participants from industry and science from Germany, Austria, Switzerland and Denmark. <\/p>\n<p>Solites has been involved in an advisory capacity in the <strong>development of Danish underground heat storages<\/strong> since 2000. On behalf of the Danish Ministry of Energy, Solites has evaluated the operating data of the underground heat storages in Marstal, Dronninglund and Gram for the years 2014 to 2018. Since then, Solites has been a member of the Danish operator group for large heat storages, which meets once a year to share new findings and discuss operating experience.  <\/p>\n<p>Solites advises on the development of <strong>VDI guidelines. <\/strong><a href=\"https:\/\/www.solites.de\/en\/team\/#schmidt\">Thomas Schmidt<\/a> is responsible for this in <a href=\"https:\/\/www.vdi.de\/richtlinien\/details\/vdi-4640-blatt-3-thermische-nutzung-des-untergrunds-unterirdische-thermische-energiespeicher\" target=\"_blank\" rel=\"noopener\">VDI 4640 &#8211; Sheet 3<\/a> (Thermal utilization of the underground &#8211; Underground thermal energy storage).<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1331.2px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-5 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:16px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:16px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":4441,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"footnotes":""},"class_list":["post-4685","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - 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