{"id":2231,"date":"2024-02-14T10:31:11","date_gmt":"2024-02-14T10:31:11","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2231"},"modified":"2025-09-12T14:49:57","modified_gmt":"2025-09-12T14:49:57","slug":"heat-pumps-a-towns-heating-network-and-gas-boilers-all-work-together","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/heat-pumps-a-towns-heating-network-and-gas-boilers-all-work-together\/","title":{"rendered":"Heat pumps, a town&#8217;s heating network and gas boilers all work together"},"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\">\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>Room with a view, Oostende<\/strong><\/p>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \" style=\"letter-spacing:0px\">In the centre of Ostend, on Belgium\u2019s coast, a new building project is being completed. The Waves complex will be made up of four buildings, \u2018Sea\u2019, \u2018Salt\u2019, \u2018Sand\u2019 and \u2018Sky\u2019. In a special room on top of \u2018Sea\u2019, there is a hybrid air-gas heat source, which will provide heating and sanitary hot water for the 118 flats and commercial spaces below.<\/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=\"437\" height=\"235\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/be001-house.png\" alt=\"\" class=\"wp-image-2232\" style=\"aspect-ratio:1.6289592760180995;width:494px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/be001-house.png 437w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/be001-house-300x161.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/be001-house-400x215.png 400w\" sizes=\"auto, (max-width: 437px) 100vw, 437px\" \/><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>&#8220;By constantly injecting a minimum amount of hot water to each floor of the building, the system makes it possible to draw hot water out of the taps almost instantly.&#8221; (D. Vanlandeghem, Vermote) <\/li>\n\n\n\n<li>&#8220;The heat output of the heat source was calculated according to the needs of the fully occupied building. In this way, substantial savings can be made on the total installed power for the production of hot water.&#8221; (L. Depaepe, Vaillant)<\/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>Ostend, Belgium<\/em><\/td><td>Number of HP<\/td><td><em>8<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>ongoing as of 11.2023<\/em><\/td><td>Installed power<\/td><td><em>8 x 8,5 kW<\/em><\/td><\/tr><tr><td>Heat distribution<\/td><td>&#8211;<\/td><td>Operation mode<\/td><td><em>bivalent<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>&#8211; m\u00b2<\/em><\/td><td>Heat source<\/td><td><em>air<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>118 + commercial spaces<\/em><\/td><td>Model<\/td><td><em>Vaillant aroTHERM plus VWL 125\/6 A<\/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>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>Type of system<\/td><td><em>central<\/em><\/td><td>Type of system<\/td><td><em>central<\/em><\/td><\/tr><tr><td>Heating<br>temperature<\/td><td><em>75 \u00b0C<\/em><\/td><td>Max. temperature<\/td><td><em>75 \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><em>additional heating units<\/em><\/td><td><em>gas<br>town&#8217;s heating network<\/em><\/td><td>COP<\/td><td><em>5.4<\/em><\/td><\/tr><tr><td>Capacity<\/td><td><em>600kW with gas condensing boiler<br>and 96 kW wirh air\/water monobloc heat pumps<\/em><\/td><td>Refrigerant<\/td><td><em>R290<\/em><\/td><\/tr><tr><td>Hot water storage<\/td><td><em>1,500l + 2,000l<\/em><\/td><td>Costs<\/td><td><em>~130.000\u20ac<\/em><\/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 container--no-margin\">\n<p class=\"wp-block-paragraph \">The room atop the 14-story building contains five Vaillant ecoTEC gas condensation boilers, an exhaust duct and two allSTOR plus reservoirs, of 1,500 and 2,000 litres. The large reservoir is connected to eight air-water aroTHERM plus heat pumps which sit on the roof, outside the building, while the smaller one is connected to the town\u2019s heating network. This will allow it to use the waste heat from Ostend\u2019s incinerator and industries.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Buffer tanks play an essential role in ensuring that heat pumps and gas boilers work together. The air-to-water heat pumps work at a lower temperature. The return water from the combined loop first passes through the heat pumps&#8217; buffer tank. It then flows into the small buffer tank connected to the Vaillant ecoTEC plus wall-mounted gas condensing boilers, where it is heated further if necessary. Vaillant has calculated the size of the buffer tanks to ensure sufficiently long operating times for the heat pumps and boilers.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In addition, Vaillant has a fully modular control system that can be expanded as required. All this ensures that the different energy sources (gas boilers, heat pumps) work together smoothly.<\/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\/2024\/01\/fact-sheet-vaillant-ostendv3.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 \">BE001 Room with a view&nbsp; <\/p>\n<\/div><\/div>\n<\/div>\n\n\n<ol class=\"wp-block-footnotes\"><li id=\"56f4550a-92b4-49b4-ba3c-e242882597b9\">https:\/\/www.ehpa.org\/news-and-resources\/publications\/heat-pumps-and-high-rise-homes-case-studies-from-across-europe\/ <a href=\"#56f4550a-92b4-49b4-ba3c-e242882597b9-link\" aria-label=\"Jump to footnote reference 1\">\u21a9\ufe0e<\/a><\/li><\/ol><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Room with a view, Oostende In the centre of Ostend, on Belgium\u2019s coast, a new building project is being completed&#8230;.<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[16],"applications":[7,41],"class_list":["post-2231","case_studies","type-case_studies","status-publish","hentry","markets-belgium","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2231","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":3,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2231\/revisions"}],"predecessor-version":[{"id":2285,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2231\/revisions\/2285"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2231"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2231"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2231"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}