{"id":2337,"date":"2024-02-27T09:29:25","date_gmt":"2024-02-27T09:29:25","guid":{"rendered":"https:\/\/heatpumpingtechnologies.org\/annex62\/?page_id=2337"},"modified":"2025-09-12T14:55:42","modified_gmt":"2025-09-12T14:55:42","slug":"les-vergers","status":"publish","type":"case_studies","link":"https:\/\/heatpumpingtechnologies.org\/project62\/case-studies\/les-vergers\/","title":{"rendered":"Les Vergers"},"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>Les Vergers, Geneva<\/strong><\/p>\n<\/div><\/div>\n\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">An eco-district including 33 high performance buildings heated by a 5 MWth heat pump on shallow groundwater.<\/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=\"439\" height=\"247\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-building.png\" alt=\"\" class=\"wp-image-2338\" style=\"aspect-ratio:1.777327935222672;width:509px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-building.png 439w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-building-300x169.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-building-400x225.png 400w\" sizes=\"auto, (max-width: 439px) 100vw, 439px\" \/><\/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>High DH return temperature (mainly in mid-season in SH mdoe, all year round in DHW mode) causes a degradation of the heat pump Seasonal Performance Factor (SPF), or causes HP shutdowns.<\/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>1<\/em><\/td><\/tr><tr><td>Construction<\/td><td><em>2015-2020<\/em><\/td><td>Installed power<\/td><td><em>5,000 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>170,000 m\u00b2<\/em><\/td><td>Heat source<\/td><td><em>groundwater,<br>heat recovery<\/em><\/td><\/tr><tr><td>No. of apartments<\/td><td><em>1,350 in 33 buildings<br><strong>\u2300<\/strong> 41 per building<\/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>46 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>35 \u00b0C<\/em><\/td><td>Max. temperature<\/td><td><em>60 \u00b0C<\/em><\/td><\/tr><tr><td>SH share<\/td><td><em>64 %<\/em><\/td><td>DHW share<\/td><td><em>36%<\/em><\/td><\/tr><tr><td>Add. heat <br>production<\/td><td><em>Geneva&#8217;s main DH <\/em><br><em>(gas boilers &amp;<br>waste incineration)<\/em><\/td><td>Type of system<\/td><td><em>central per building<\/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>85%<\/em><\/td><td>COP<\/td><td><em>&#8211;<\/em><\/td><\/tr><tr><td>Backup heat source share<\/td><td><em>15%<\/em><\/td><td>SPF<\/td><td><em>3.7<\/em><\/td><\/tr><tr><td>PV installation<\/td><td><em>12,000 m\u00b2<\/em><\/td><td><\/td><td><\/td><\/tr><tr><td>Heat Cost (LCOE)<\/td><td><em>CHF 13.-\/ (m\u00b2a)<\/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 \">\u201cLes Vergers\u201d is an eco-district composed of 33 high performance buildings, whose main heat source is a low temperature district heating network. This network is mainly supplied by a water-to-water HP using two resources: groundwater from the Rhone River and waste heat from the neighboring industries.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The results show that this eco-district is in line with the cantonal energy master plan, both in terms of building energy efficiency and massive integration of renewable energies.<\/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 is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"737\" height=\"353\" src=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-scheme.png\" alt=\"\" class=\"wp-image-2339\" style=\"aspect-ratio:2.087818696883853;width:783px;height:auto\" srcset=\"https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-scheme.png 737w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-scheme-300x144.png 300w, https:\/\/heatpumpingtechnologies.org\/content\/uploads\/sites\/75\/2024\/02\/ch012-scheme-400x192.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 \">\u201cLes Vergers\u201d is an eco-district including 33 high performance buildings, with around 1\u2019350 dwellings and various activities, totalizing 170\u2019000&nbsp;m\u00b2 of heated area. A local low-temperature district heating network (LTDH) distributes heat to the buildings for SH and DHW. Since all connected buildings meet high energy performance standards, the LTDH supplies heat at a low temperature level (50\u00b0C). At fixed time, twice a day, the supply temperature of the network is raised from 50\u00b0C to 65\u00b0C to heat up DHW tanks located within the buildings over a 2-hour period. Compared to a network with a constant supply temperature of 65\u00b0C, this lowers DH heat losses and increases the energy performance of the heat production. The LTDH is supplied by a 5&nbsp;MW<sub>th<\/sub> HP, whose heat source is shallow groundwater. Before reaching the HP, this cold water at approximately 12\u00b0C supplies a district cooling network, recovering waste heat from the nearby industries, thereby increasing the resource temperature for the HP and improving its efficiency. As complementary or back-up heat source, the LTDH is connected to Geneva\u2019s high-temperature main district heating network, which is supplied by gas boilers and heat recovery from the city\u2019s waste incineration plant.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The DH substations consist here of two parallel primary heat exchangers, one for SH distribution and the other for DHW production. Buildings are equipped with ventilation heat recovery, mostly by way of exhaust air HP, producing heat for DHW preheating and\/or SH.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">The LTDH heat production (July 2019 \u2013 June 2020) is covered at 85% by the HP and at 15% by CAD-SIG (due to HP maintenance). The monitored HP SPF is 3.7, the COP reaches 4.3 in SH mode (condenser outlet at 50\u00b0C) and 3.3 in DHW mode (condenser outlet at 65\u00b0C). The heat source\/evaporator inlet varies between 13-16\u00b0C.<\/p>\n<\/div>\n\n<div class=\"container container--no-margin\">\n<p class=\"wp-block-paragraph \">Final report: SCHNEIDER, Stefan, BRISCHOUX, Pauline, HOLLMULLER, Pierre (2022). Retour d\u2019exp\u00e9rience \u00e9nerg\u00e9tique sur le quartier des Vergers \u00e0 Meyrin (Gen\u00e8ve). <br>Url: <a href=\"https:\/\/archive-ouverte.unige.ch\/unige:164877\">https:\/\/archive-ouverte.unige.ch\/unige:164877<\/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\/ch012factsheetles-vergers.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 \">CH012 Les Vergers&nbsp; <\/p>\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les Vergers, Geneva An eco-district including 33 high performance buildings heated by a 5 MWth heat pump on shallow groundwater&#8230;.<\/p>\n","protected":false},"author":41,"featured_media":0,"menu_order":0,"template":"","filters":[],"markets":[29],"applications":[7,41],"class_list":["post-2337","case_studies","type-case_studies","status-publish","hentry","markets-switzerland","applications-buildings","applications-multi-family-buildings"],"acf":[],"_links":{"self":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2337","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\/2337\/revisions"}],"predecessor-version":[{"id":2362,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/case_studies\/2337\/revisions\/2362"}],"wp:attachment":[{"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/media?parent=2337"}],"wp:term":[{"taxonomy":"filters","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/filters?post=2337"},{"taxonomy":"markets","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/markets?post=2337"},{"taxonomy":"applications","embeddable":true,"href":"https:\/\/heatpumpingtechnologies.org\/project62\/wp-json\/wp\/v2\/applications?post=2337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}