{"id":2348,"date":"2024-02-27T10:03:31","date_gmt":"2024-02-27T10:03:31","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2348"},"modified":"2025-09-12T15:03:24","modified_gmt":"2025-09-12T15:03:24","slug":"soubeyran","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/soubeyran\/","title":{"rendered":"Soubeyran"},"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>Soubeyran, Geneva<\/strong><\/p>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Heat pumps on exhaust air for Space Heating (SH) and Domesic Hot Water (DHW) in a very high performance multifamily building.<\/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=\"440\" height=\"298\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-building.png\" alt=\"\" class=\"wp-image-2349\" style=\"aspect-ratio:1.476510067114094;width:520px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-building.png 440w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-building-300x203.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-building-400x271.png 400w\" sizes=\"auto, (max-width: 440px) 100vw, 440px\" \/><\/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>Heat recovery in new multifamily buildings, especially from ventilation, has the potential to cover a large part of their heat demand.<\/li>\n\n\n\n<li>While the use of heat pumps on exhaust air for the preheating of DHW is widespread, their use for combined DHW and SH production is much less known, results in a more complex system, for which standard solutions and hydraulic schemes need to be developed. <\/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>Geneva, Switzerland<\/em><\/td><td>Number of HP<\/td><td><em>2<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>2017<\/em><\/td><td>Installed power<\/td><td><em>44 kWth<\/em><\/td><\/tr><tr><td>Heat distribution<\/td><td><em>underfloor heating<\/em><\/td><td>Operation mode<\/td><td><em>bivalent<\/em><\/td><\/tr><tr><td>Heated area<\/td><td><em>4,607 m\u00b2<\/em> <em>(one block)<\/em><\/td><td>Heat source<\/td><td><em>exhaust air<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>&#8211;<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>Level of insulation<\/td><td><em>high performance<\/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>35 kWh \/ (m\u00b2a)<\/em><\/td><td>DHW demand<\/td><td><em>18 kWh \/ (m\u00b2a)<\/em><\/td><\/tr><tr><td>Heating<br>temperature<\/td><td><em>35 \u00b0C<\/em><\/td><td>Max. temperature<\/td><td><em>60 \u00b0C<\/em><\/td><\/tr><tr><td>SH share<\/td><td><em>38 %<\/em><\/td><td>DHW share<\/td><td><em>34%<\/em><\/td><\/tr><tr><td>back-up heat <br>production<\/td><td><em>gas boiler (125 kW)<\/em><\/td><td>Type of system<\/td><td><em>central<\/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>HP share<\/td><td><em>38%<\/em><\/td><td>COP<\/td><td><em>&#8211;<\/em><\/td><\/tr><tr><td>Gas boiler share<\/td><td><em>62%<\/em><\/td><td>SPF<\/td><td><em>3.28<\/em><\/td><\/tr><tr><td>PV installation<\/td><td><em>30 kWp<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>Ventilation<\/td><td><em>single-flow with heat <br>recovery<\/em><\/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 \">Located in Geneva and built in 2017 by two housing cooperatives, the building under consideration has a 4607&nbsp;m<sup>2<\/sup> heating reference area, which includes business premises on the ground floor and collective housing on the 5 upper floors. Its planned SH demand (18.6&nbsp;kWh\/m<sup>2<\/sup>\/year) meets the cantonal \u201cvery high energy performance\u201d standard.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Despite of the relative difference between planned and effective SH demand, which is a common situation, the SH demand of this building is close to the median of Geneva\u2019s multifamily buildings constructed between 2011 and 2020.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In contrast, the DHW production turns out to be at the lower end of a benchmark on existing MFBs in Geneva.<\/p>\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\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"643\" height=\"372\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-scheme.png\" alt=\"\" class=\"wp-image-2350\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-scheme.png 643w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-scheme-300x174.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch014-scheme-400x231.png 400w\" sizes=\"auto, (max-width: 643px) 100vw, 643px\" \/><\/figure>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The heat production system consists of two exhaust-air HPs (2 x 22&nbsp;kW<sub>th<\/sub>), which supply the underfloor SH system as well as DHW preheating, via common buffers. A condensing gas boiler (125&nbsp;kW) ensures the complementary SH and DHW production. A 3-way valve allows to send the return flow from SH and DHW production directly to the gas boiler heat exchanger if its temperature is higher than that available in the accumulators, which happens when the gas boiler is in operation.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Heat recovery in new MFB buildings, especially from ventilation, has the potential to cover a large part of their heat demand. While the use of HPs on exhaust air for the preheating of DHW is widespread, their use for combined DHW and SH production is much less known.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">In this case study, a HP system on exhaust air covers 38% of the heat production for SH and DHW of a new MFB, against a 61% projected value. Such discrepancy seems to be due to: i) a miss evaluation of the actual HP production \/ performance, as well as of the intrinsic HP temperature limitations in regard to DHW production; ii) a non-optimized hydraulic system, inducing unnecessary HP temperature degradation along the distribution chain.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">While such solutions seem of interest for high energy performance buildings, and a fortiori when the DHW demand is lower than the potential heat recovery on exhaust air, it results in a more complex heat production and distribution system, for which standard solutions and hydraulic schemes need to be developed, and further monitoring in real condition of use needs to be done.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Final report: CALLEGARI, Simon Augustin, HOLLMULLER, Pierre (2023). Soubeyran 7 : pompes \u00e0 chaleur sur air vici\u00e9 avec valorisation pour le chauffage et l\u2019eau chaude sanitaire, dans un immeuble d\u2019habitat collectif de tr\u00e8s haute performance \u00e9nerg\u00e9tique \u00e0 Gen\u00e8ve. <br>Url: <a href=\"https:\/\/archive-ouverte.unige.ch\/unige:169454\">https:\/\/archive-ouverte.unige.ch\/unige:169454<\/a><\/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\/02\/ch014factsheetsoubeyran.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 \">CH014 Soubeyran<\/p>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Soubeyran, Geneva Heat pumps on exhaust air for Space Heating (SH) and Domesic Hot Water (DHW) in a very high&#8230;<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[30],"applications":[7,41],"class_list":["post-2348","case_studies","type-case_studies","status-publish","hentry","markets-the-netherlands","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2348","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\/2348\/revisions"}],"predecessor-version":[{"id":2359,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2348\/revisions\/2359"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2348"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2348"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2348"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}