{"id":2256,"date":"2024-02-14T13:28:54","date_gmt":"2024-02-14T13:28:54","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2256"},"modified":"2026-03-11T09:40:11","modified_gmt":"2026-03-11T09:40:11","slug":"green-buildings-geothermal","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/green-buildings-geothermal\/","title":{"rendered":"Green buildings &#8211; geothermal"},"content":{"rendered":"<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Ennepetal<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In Ennepetal, North Rhine-Westphalia in western Germany, a private investor is building three apartment buildings of which one is being used as a reference project for achieving energy efficiency in the most economical way.<\/p>\n<\/div>\n\n<div class=\"container\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"737\" height=\"248\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/de006-building-1.png\" alt=\"\" class=\"wp-image-2259\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/de006-building-1.png 737w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/de006-building-1-300x101.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/de006-building-1-400x135.png 400w\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" \/><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>What to look out for<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<ul class=\"wp-block-list\">\n<li>The target is to reach the &#8216;KfW Efficiency House 55 standard&#8217;<\/li>\n\n\n\n<li>Is the project economically viable and will the investment pay off?<\/li>\n<\/ul>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Key facts<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>Building<\/strong><\/td><td><\/td><td><strong>Heat Pump and Source<\/strong><\/td><td><\/td><\/tr><tr><td>Location<\/td><td><em>Ennepetal, Germany<\/em><\/td><td>Number of HP<\/td><td><em>1<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>ongoing<\/em> <em>at time of case study intake<\/em><\/td><td>Installed power<\/td><td><em>46 kW<\/em><\/td><\/tr><tr><td>Heat distribution<\/td><td><em>underfloor heating<\/em> <em>&amp; panel<\/em><\/td><td>Operation mode<\/td><td><em>monoenergetic<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>&#8211; m\u00b2<\/em><\/td><td>Heat source<\/td><td><em>ground<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>12<\/em><\/td><td>Function<\/td><td><em>Space Heating<\/em><\/td><\/tr><tr><td>level of insulation<\/td><td><em>very good<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><strong>Heating sytem<\/strong><\/td><td><\/td><td><strong>Domestic Hot Water<\/strong><\/td><td><\/td><\/tr><tr><td><\/td><td><\/td><td>DHW system<\/td><td><em>Electric wall heater<\/em><\/td><\/tr><tr><td>Heat demand<\/td><td><em>&#8211; kWh \/ (m\u00b2a)<\/em><\/td><td>DHW demand<\/td><td><em>&#8211; kWh \/ (m\u00b2a)<\/em><\/td><\/tr><tr><td>Heating<br>temperature<\/td><td><em>40 \u00b0C<\/em><\/td><td>Type of system<\/td><td><em>central<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td>Max. temperature<\/td><td><em>65 \u00b0C<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td>Circulation system <\/td><td>&#8211;<\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td><strong>Other information<\/strong><\/td><td><\/td><td><\/td><td><\/td><\/tr><tr><td>Cost (without drilling)<\/td><td><em>70,000\u20ac<\/em><\/td><td>COP<\/td><td>4.4<\/td><\/tr><tr><td><\/td><td><\/td><td>Refrigerant<\/td><td><em>R410A<\/em><\/td><\/tr><tr><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Description of the technical concept<\/strong><\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In order to reach the target \u2013 the \u2018KfW Efficiency House 55 standard \u2013 ten possible system configurations were compared.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In this particular case, the planners chose the option based on a geotherm brine\/water heat pump with an output of 46 kW. An eloBLOCK electric water wall heater secures peak loads and drinking water hygiene. A multi-functional storage tank with a capacity of 2,000 liters serves as a heat buffer to ensure sufficient hot water supply. Space heating is distributed via a panel heating system with a flow\/return temperature of 35\/30\u00b0C. All living spaces are also ventilated in a controlled manner.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">This approach massively saves operating costs. A further benefit is that everything comes from a single source. Thus, the various system components are perfectly matched to each other \u2013 from the heat pump to the supporting electric heating to the identical control system.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<div class=\"wp-block-buttons is-horizontal is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-b989473c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-vivid-cyan-blue-color has-white-background-color has-text-color has-background has-medium-font-size has-text-align-center has-custom-font-size wp-element-button\" href=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/01\/fact-sheet-vaillant-ennepetaln.pdf\" style=\"border-radius:5px;text-transform:none\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"845\" height=\"237\" class=\"wp-image-2196\" style=\"width: 300px\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic.png\" alt=\"\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic.png 845w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-300x84.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-768x215.png 768w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/fact-sheet-button-pic-400x112.png 400w\" sizes=\"auto, (max-width: 845px) 100vw, 845px\" \/> <\/a><\/div>\n<\/div>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"has-text-align-center wp-block-paragraph \">DE006 Ennepetal&nbsp; <\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Ennepetal In Ennepetal, North Rhine-Westphalia in western Germany, a private investor is building three apartment buildings of which one is&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[24],"applications":[7,41],"class_list":["post-2256","case_studies","type-case_studies","status-publish","hentry","markets-germany","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies"}],"about":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/types\/case_studies"}],"author":[{"embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/users\/41"}],"version-history":[{"count":5,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2256\/revisions"}],"predecessor-version":[{"id":3529,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2256\/revisions\/3529"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2256"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2256"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2256"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}