{"id":117862,"date":"2023-08-18T13:22:08","date_gmt":"2023-08-18T11:22:08","guid":{"rendered":"https:\/\/www.velasolaris.com\/handbuch\/energy-flow-diagram\/"},"modified":"2026-08-13T13:54:55","modified_gmt":"2026-08-13T11:54:55","slug":"energy-flow-diagram","status":"publish","type":"handbuch","link":"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/results-and-analysis\/energy-flow-diagram\/","title":{"rendered":"Energy Flow Diagram"},"content":{"rendered":"\n<h1 id=\"h-creating-an-energy-flow-diagram-heat-pump-photovoltaic-system-and-more\" class=\"wp-block-heading\">Creating an Energy Flow Diagram: Heat Pump, Photovoltaic System and More<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The energy flow diagram in Polysun \u2014 also known as a Sankey diagram \u2014 visualizes a system&#8217;s energy balance in a clear graphical representation. The width of the arrows directly indicates the size of the respective energy flow. This makes it possible to transparently trace energy input, distribution, and losses, and quickly identify optimization potential.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" hcb-fetch-image-from=\"https:\/\/youtu.be\/RzV1fURYO54\" title=\"Creating an energy flow diagram in Polysun\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/RzV1fURYO54?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 id=\"h-energy-flow-diagram-layout-structure-and-color-coding\" class=\"wp-block-heading\">Energy Flow Diagram: Layout, Structure and Color Coding<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The energy flow diagram is accessed via the menu Results \u2192 Energy flow diagram.<\/p>\n\n\n\n<h3 id=\"h-structure-of-the-diagram\" class=\"wp-block-heading\">Structure of the Diagram<br><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The diagram is arranged from left to right:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Left<\/strong>: Energy sources (environmental energy, fuels, electricity from the grid)<\/li>\n\n\n\n<li><strong>Middle<\/strong>: Generators and converters (heat pump, boiler, CHP unit, solar collectors)<\/li>\n\n\n\n<li><strong>Right<\/strong>: Consumers (space heating, hot water) and losses<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The arrow width corresponds to the amount of energy transported \u2014 wider arrows mean larger energy flows.<\/p>\n\n\n\n<h3 id=\"h-color-coding\" class=\"wp-block-heading\">Color Coding<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Color<\/th><th>Type of energy<\/th><\/tr><\/thead><tbody><tr><td>Blue<\/td><td>Cooling energy<\/td><\/tr><tr><td>Red<\/td><td>Heating energy<\/td><\/tr><tr><td>Yellow<\/td><td>Electrical energy<\/td><\/tr><tr><td>Green<\/td><td>Environmental energy (geothermal, solar, outdoor air)<\/td><\/tr><tr><td>Copper<\/td><td>Combustion energy<\/td><\/tr><tr><td>Gray<\/td><td>Losses<\/td><\/tr><tr><td>Purple<\/td><td>Various energies<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"h-creating-an-energy-flow-diagram-for-cascaded-heat-pumps\" class=\"wp-block-heading\">Creating an Energy Flow Diagram for Cascaded Heat Pumps<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For systems with cascaded heat generators \u2014 such as booster heat pumps or multi-stage systems \u2014 Polysun detects this automatically. When creating the energy flow diagram, a dialog window opens to define the cascade layout.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"152\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1024x152.png\" alt=\"\" class=\"wp-image-144619\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1024x152.png 1024w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-300x44.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-768x114.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-200x30.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-400x59.png 400w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image.png 1040w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"824\" height=\"521\" src=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1.png\" alt=\"\" class=\"wp-image-144620\" srcset=\"https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1.png 824w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1-300x190.png 300w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1-768x486.png 768w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1-200x126.png 200w, https:\/\/www.velasolaris.com\/wp-content\/uploads\/2026\/08\/image-1-400x253.png 400w\" sizes=\"auto, (max-width: 824px) 100vw, 824px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><em>Heat Pump Cascade Dialog: Defining Stages<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the wrong selection was made, or if you want to make subsequent adjustments to the visualization, the dialog for defining the cascade layout can be reopened at any time. To do so, click the &#8220;Change cascade layout&#8221; button in the bottom right of the energy flow diagram.<\/p>\n\n\n\n<h2 id=\"h-identifying-deficits-in-the-system\" class=\"wp-block-heading\">Identifying Deficits in the System<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The energy flow diagram clearly highlights system deficits with a cross-text. This indicates when the system is unable to supply the required energy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In addition, the diagram shows the proportion in which each heat generator contributes to covering the energy demand \u2014 making it easy to identify optimization potential and inefficient components at a glance.<\/p>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1786541677107\"><h3 class=\"schema-faq-question\"><strong>Can I use the energy flow diagram to compare different system concepts?<\/h3><\/strong> <p class=\"schema-faq-answer\">Yes. Polysun creates a separate energy flow diagram for each system variant. This allows different generator configurations to be visually compared and evaluated on a well-founded basis<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786541716830\"><h3 class=\"schema-faq-question\">Are complex hybrid systems also displayed correctly?<\/h3> <p class=\"schema-faq-answer\">Yes. Polysun automatically detects cascaded systems \u2014 such as booster heat pumps or multivalent systems with a CHP unit, heat pump, and peak-load boiler \u2014 and displays the energy flows correctly.<br><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1786541769166\"><h3 class=\"schema-faq-question\"><strong>How does the energy flow diagram help with system sizing?<\/h3><\/strong> <p class=\"schema-faq-answer\">The diagram shows at a glance the coverage share provided by each heat generator. This makes it easy to check whether the sizing of the heat pump or boiler matches the heat consumption, and how much of the heat demand is covered by which heat generator.<br><\/p> <\/div> <\/div>\n","protected":false},"author":19748,"featured_media":0,"parent":117544,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-117862","handbuch","type-handbuch","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Creating Energy flow diagrams for energy systems in Polysun<\/title>\n<meta name=\"description\" content=\"Learn how the energy flow diagram visualizes energy systems in Polysun. Discover potential for optimization and efficiency.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/results-and-analysis\/energy-flow-diagram\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Energy Flow Diagram\" \/>\n<meta property=\"og:description\" content=\"Learn how the energy flow diagram visualizes energy systems in Polysun. 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Polysun creates a separate energy flow diagram for each system variant. This allows different generator configurations to be visually compared and evaluated on a well-founded basis","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/results-and-analysis\/energy-flow-diagram\/#faq-question-1786541716830","position":2,"url":"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-designer\/results-and-analysis\/energy-flow-diagram\/#faq-question-1786541716830","name":"Are complex hybrid systems also displayed correctly?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. 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