{"id":2216,"date":"2024-02-13T13:56:15","date_gmt":"2024-02-13T13:56:15","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2216"},"modified":"2025-09-12T15:03:56","modified_gmt":"2025-09-12T15:03:56","slug":"sourcing-heat-from-everywhere-even-car-exhaust-fumes","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/sourcing-heat-from-everywhere-even-car-exhaust-fumes\/","title":{"rendered":"Sourcing heat from everywhere &#8211; even car exhaust fumes"},"content":{"rendered":"\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \" style=\"font-size:25px\"><strong>D12, Vienna<\/strong><\/p>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The residential building D12 is a block of 7 buildings with 4-6 storeys each, commercial use on the ground-floor (GF) with 8 shops on 900 m2 and 213 flats on the upper levels. Seven heat pumps have been installed to cover the buildings energy supply in combination with PV, solar thermal and solar hybrid modules.<\/p>\n<\/div>\n\n<div class=\"container\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"360\" height=\"221\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-house.png\" alt=\"\" class=\"wp-image-2217\" style=\"aspect-ratio:1.6289592760180995;width:448px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-house.png 360w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-house-300x184.png 300w\" sizes=\"auto, (max-width: 360px) 100vw, 360px\" \/><figcaption class=\"wp-element-caption\"><sup data-fn=\"56f4550a-92b4-49b4-ba3c-e242882597b9\" class=\"fn\"><a href=\"#56f4550a-92b4-49b4-ba3c-e242882597b9\" id=\"56f4550a-92b4-49b4-ba3c-e242882597b9-link\">1<\/a><\/sup><\/figcaption><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \"><strong>Lessons learned&nbsp;<\/strong><\/p>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<ul class=\"wp-block-list\">\n<li>The ground and groundwater coupled heat pumps supply the lion&#8217;s share of the heat, about four fifths of the total heat supplied was provided by these heat pump systems.<\/li>\n\n\n\n<li>Air source heat pump (parking garage) could be used mainly during summer to provide high temperature heat, whereas ground source heat pump mainly during winter (highest source temperature)<\/li>\n\n\n\n<li>The \u201cmultiple-heat source concept\u201d of the overall energy system is approved to deliver a high redundancy and availability. Generally, no heat backup \u2013 like district heating \u2013 is required. Nevertheless, the district heating function as a thermal backup and guarantees high thermal comfort during heating season.<\/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\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><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>Vienna, Austria<\/em><\/td><td>Number of HP<\/td><td><em>4 + 2 + 1<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>201<\/em>6<\/td><td>Installed power<\/td><td><em>4 x 144.1 kWh <br>2 x 65.1 kWh<br>1 x 57.8 kWh<\/em><\/td><\/tr><tr><td>Heat distribution<\/td><td><em>underfloor heating<\/em><\/td><td>Operation mode<\/td><td><em>monoenergetic<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>19,080 m\u00b2<\/em><\/td><td>Heat source<\/td><td><em>4 x groundwater<br>2 x ground<br>1 x exhaust air<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>213<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>level of insulation<\/td><td>very good<\/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>Heat demand<\/td><td><em>15.6 kWh \/ (m\u00b2a)<\/em><\/td><td>DHW demand<\/td><td><em>26 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><em>yes<\/em><\/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>PV &amp; ST installation<\/td><td><em>yes<\/em><\/td><td>COP<\/td><td><em>4 x 3.57<br>2 x 4.47<br>1 x 3<\/em><\/td><\/tr><tr><td>Solar thermal<\/td><td><em>90 kWth<\/em><\/td><td>Ground storage<\/td><td><em>40 MWh th<\/em><\/td><\/tr><tr><td>PVT<\/td><td><em>60 kWth \/ 16kWpel<\/em><\/td><td>Hot water storage<\/td><td>6 x 2000l backup for SH and DHW<\/td><\/tr><tr><td>Photovoltaics<\/td><td>20 kWp<\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\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\">\n<figure class=\"wp-block-image aligncenter size-full is-style-default\"><img loading=\"lazy\" decoding=\"async\" width=\"656\" height=\"397\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-scheme.png\" alt=\"\" class=\"wp-image-2218\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-scheme.png 656w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-scheme-300x182.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/at003-scheme-400x242.png 400w\" sizes=\"auto, (max-width: 656px) 100vw, 656px\" \/><figcaption class=\"wp-element-caption\"><sup data-fn=\"cd90139c-b080-48cd-9997-35b4180767e7\" class=\"fn\"><a href=\"#cd90139c-b080-48cd-9997-35b4180767e7\" id=\"cd90139c-b080-48cd-9997-35b4180767e7-link\">2<\/a><\/sup><\/figcaption><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The innovative energy supply system of the D12 is using several heat pump technologies combined with various sources (air, soil, groundwater, solar) and storage technologies. The control strategy operates the combinations of heat pumps with the most efficient heat source (based on demand and the external boundary conditions) and loads the thermal storage system. The connection between those plant components of the heat supply and the heat consumers is realized with two loops for high and low temperature supply of a set point of 65 \u00b0C for domestic hot water (DHW) and 40\u00b0C for space heating (SH). Using a so called \u2018stratifier lance module\u2019 the solar heat can be fed into high, middle and low temperature level storages, so that collector operating time and performance is maximized.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The heat generation systems are located in 6 building service rooms, each with SH and DHW buffer storages (6 X 2,000 l) connected with the two loops. The electrical energy demand of the HVAC system is supplied by the PV collectors, hybrid collectors and the battery storage and, if not available, from the public electricity grid.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">As SH emission system, a floor heating system is installed. It is connected to the low temperature water loop and consists of 228 heating circuits. 17 main pumps circulate water to the ascending major distribution pipes with a total mass flow rate of 95 m\u00b3\/h. The DHW production is provided by 5 freshwater modules connected to the high temperature loop. Each of these plate heat exchangers has a maximum heat transfer capacity of 315 kWth. The building complex is as well connected to the local district heating network with a capacity of 1.5 MWth. The heat system is operated in a holistic approach and the required\/delivered energy is exchanged homogeneously over the hydraulic rings. However, the current water flow direction \/ frequency of the changes of direction cannot be determined explicitly. There are basically two operational modes depending on pressure difference:<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">1) Two or more active components operate the water network: The pumps produce the required pressure to direct the water flow, the pumps supply heat to the heating circuit and load the buffer tanks.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">2) No heat generators running: The thermal water tanks are discharged and supply heat to the heating circuit.<\/p>\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\"><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 has-custom-font-size is-style-outline has-medium-font-size is-style-outline--1\" style=\"text-transform:none\"><a class=\"wp-block-button__link has-vivid-cyan-blue-color has-white-background-color has-text-color has-background has-text-align-center wp-element-button\" href=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2023\/11\/fact-sheet-d12.pdf\" style=\"border-radius:5px\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"84\" 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: 300px) 100vw, 300px\" \/> <\/a><\/div>\n<\/div>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"has-text-align-center wp-block-paragraph \">AT003 D12&nbsp; <\/p>\n<\/div><\/div>\n<\/div>\n\n\n<ol class=\"wp-block-footnotes\"><li id=\"56f4550a-92b4-49b4-ba3c-e242882597b9\">Pictures: IEA HPT Annex 49 \u201cnZEB &#8211; Residential Building D12 \u2013 Aspern \/ Vienna \/ Austria\u201d <a href=\"#56f4550a-92b4-49b4-ba3c-e242882597b9-link\" aria-label=\"Jump to footnote reference 1\">\u21a9\ufe0e<\/a><\/li><li id=\"cd90139c-b080-48cd-9997-35b4180767e7\">ibid. <a href=\"#cd90139c-b080-48cd-9997-35b4180767e7-link\" aria-label=\"Jump to footnote reference 2\">\u21a9\ufe0e<\/a><\/li><\/ol>","protected":false},"excerpt":{"rendered":"<p>D12, Vienna The residential building D12 is a block of 7 buildings with 4-6 storeys each, commercial use on the&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[15],"applications":[7,41],"class_list":["post-2216","case_studies","type-case_studies","status-publish","hentry","markets-austria","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2216","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":2,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2216\/revisions"}],"predecessor-version":[{"id":2686,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2216\/revisions\/2686"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2216"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2216"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2216"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}