{"id":704,"date":"2025-05-26T17:01:46","date_gmt":"2025-05-26T15:01:46","guid":{"rendered":"https:\/\/planeto-energy.ch\/?page_id=704"},"modified":"2026-03-04T17:39:36","modified_gmt":"2026-03-04T16:39:36","slug":"strom-sa","status":"publish","type":"page","link":"https:\/\/planeto-energy.ch\/it\/customer-stories\/strom-sa\/","title":{"rendered":"5th Generation Shallow Geothermal Heating and Cooling"},"content":{"rendered":"

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How Planeto helped Str\u00f6m SA bring geothermal energy to a historic UNESCO site<\/h1>\n

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Using Planeto’s software, Str\u00f6m SA developed a groundbreaking sustainable solution that could revolutionize energy systems for thousands of historic villages worldwide.<\/h2>\n

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Less energy for pumping<\/p>\n

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Single-tube thermal loop<\/p>\n

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Less geothermal boreholes<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ custom_padding_last_edited=”on|phone” admin_label=”Section” module_id=”next” _builder_version=”4.27.0″ _module_preset=”default” background_enable_color=”off” custom_margin=”0px||0px||false|false” custom_padding=”||||true|false” custom_padding_tablet=”50px||50px||true|false” custom_padding_phone=”25px||25px||true|false” da_popup_slug=”next” da_disable_devices=”off|off|off” border_width_top=”1px” border_color_top=”rgba(204,204,204,0.35)” locked=”off” global_colors_info=”{}” da_is_popup=”off” da_exit_intent=”off” da_has_close=”on” da_alt_close=”off” da_dark_close=”off” da_not_modal=”on” da_is_singular=”off” da_with_loader=”off” da_has_shadow=”on”][et_pb_row column_structure=”1_4,3_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_4″ _builder_version=”4.27.0″ _module_preset=”default” background_color=”#ffffff” custom_padding=”24px|24px|24px|24px|true|true” border_radii=”on|12px|12px|12px|12px” box_shadow_style=”preset1″ box_shadow_color=”#DDE4FF” global_colors_info=”{}”][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/strom-logo.png” alt=”Strom logo” title_text=”strom logo” _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” custom_padding=”0px|0px|0px|0px|true|true” hover_enabled=”0″ border_radii=”on|12px|12px|12px|12px” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n

Company<\/strong>
Str\u00f6m SA<\/p>\n

Industry<\/strong>
Energy engineering office<\/p>\n

Project<\/strong>
67 buildings<\/p>\n

Budget<\/strong>
7 million CHF project<\/p>\n

Location
<\/strong>Grandvaux, VD, Switzerland<\/p>\n

Award Winner<\/strong>
Infrawatt innovation award<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”3_4″ _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_heading title=”Company details” _builder_version=”4.27.0″ _module_preset=”default” title_level=”h3″ title_font_size=”28px” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

STR\u00d6M SA<\/a> is an energy engineering office that brings and deploys optimized energy systems using different sort of renewable heating and cooling solutions. They offers smart homes and eco energy solutions services for personal houses and industrial environments.<\/p>\n

[\/et_pb_text][et_pb_divider color=”#DDE4FF” _builder_version=”4.27.0″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” global_colors_info=”{}”][\/et_pb_divider][et_pb_heading title=”The challenge” _builder_version=”4.27.0″ _module_preset=”default” title_level=”h3″ title_font_size=”28px” custom_padding=”0px|||||” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

The village of Grandvaux (CH) is a UNESCO World Heritage site. This historic village, nestled on the steep slopes above Lake L\u00e9man, overlooks surrounding vineyards. Decarbonizing such a site poses unique challenges due to heritage preservation requirements, limited thermal resources, and the low energy efficiency of historic buildings.<\/p>\n

The village comprises 67 buildings, mainly built between the 15th and 19th centuries, with a total heat demand of 2.3 GWh\/year.<\/p>\n

To tackle this challenging case, our client Str\u00f6m Energy, with support from the Swiss Federal Office of Energy, designed a novel 5th generation district heating and cooling system using shallow geothermal wells.<\/p>\n

<\/p>\n

[\/et_pb_text][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/lavaux.jpg” alt=”Lavaux Switzerland” title_text=”lavaux” _builder_version=”4.27.0″ _module_preset=”default” border_radii=”on|6px|6px|6px|6px” global_colors_info=”{}”][\/et_pb_image][et_pb_divider color=”#DDE4FF” _builder_version=”4.27.0″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” global_colors_info=”{}”][\/et_pb_divider][et_pb_heading title=”The solution” _builder_version=”4.27.0″ _module_preset=”default” title_level=”h3″ title_font_size=”28px” custom_padding=”0px|||||” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#232627″ text_font_size=”20px” text_line_height=”1.8em” global_colors_info=”{}”]<\/p>\n

To address these challenges, Planeto’s Software Tessa helped Str\u00f6m SA to design the new DHC network for this historic 67-building village.<\/p>\n

<\/p>\n

[\/et_pb_text][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/Grandvaux-2.png” alt=”Strom SA – Using tessa software” title_text=”Grandvaux-2″ _builder_version=”4.27.0″ _module_preset=”default” border_radii=”on|6px|6px|6px|6px” box_shadow_style=”preset1″ global_colors_info=”{}”][\/et_pb_image][et_pb_heading title=”1. Use of a single-tube loop” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h4″ title_font_size=”20px” custom_margin=”0px||0px|0px|true|false” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

<\/span><\/span>The single-pipe loop concept reduces construction costs, network pressure losses, operating costs, the number of probes and energy recovery.<\/strong><\/span><\/p>\n

A 5th-generation DHC network saves space and energy by using a low-temperature thermal vector (between 3 and 15\u00b0C) with uninsulated single-tube pipes, to which buildings are fed in series via a heat pump (HP) – and not via a heat exchanger, as is the case with 3rd- and 4th-generation DHC.<\/p>\n

Each building produce their own hot water and heat, as well as cooling. An important characteristic from 5th-generation network as cooling demands are going to increase in the next years. (By the year 2069 demands could increase by +4\u2019840%)<\/p>\n

[\/et_pb_text][et_pb_heading title=” 2. Re-using heat loss” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h4″ title_font_size=”20px” custom_margin=”0px||0px|0px|true|false” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

<\/span><\/span><\/span>5th-generation CAD networks make it possible to recycle consumption waste that can be used directly to recharge geothermal probes.<\/strong><\/span><\/p>\n

[\/et_pb_text][et_pb_heading title=”3. Reduction of the total number of boreholes” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h4″ title_font_size=”20px” custom_margin=”0px||0px|0px|true|false” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

In order to optimize the borehole configuration and minimize the long-term thermal resistance of the soil, Planeto used an optimization strategy proving that too dense a group leads to a reduction in energy performance due to significant thermal interference between probes.<\/p>\n

The layout of the 64 boreholes presented is optimally distributed, maximizing the potential for efficient extraction of heat from the boreholes.<\/p>\n

[\/et_pb_text][et_pb_image src=”https:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/06\/Boreholes.jpg” alt=”Boreholes” title_text=”Boreholes” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

<\/span><\/span>Image legend: <\/span><\/strong>Original Boreholes removed thanks to Tessa |<\/span> <\/strong>64 optimized boreholes<\/span><\/strong><\/span><\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

<\/span><\/span>This is mainly possible due to the spacing between borehole along the roads, limiting the interaction between borehole and allowing the valorization of additional regenerative sources due to the network’s low temperature. These decentralized energy recovery systems are installed to regenerate the network during the warm period of the year, allowing energy storage in the boreholes.<\/span><\/p>\n

[\/et_pb_text][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/Grandvaux.png” alt=”Strom SA – Using tessa software” title_text=”Grandvaux” _builder_version=”4.27.0″ _module_preset=”default” border_radii=”on|6px|6px|6px|6px” box_shadow_style=”preset1″ global_colors_info=”{}”][\/et_pb_image][et_pb_divider color=”#DDE4FF” _builder_version=”4.27.0″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” global_colors_info=”{}”][\/et_pb_divider][et_pb_heading title=”The results” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ title_font_size=”28px” custom_padding=”0px|||||” global_colors_info=”{}”][\/et_pb_heading][et_pb_heading title=”100% Compliance with regulations on geothermal heat extraction.” _builder_version=”4.27.0″ _module_preset=”default” title_level=”h4″ title_font_size=”20px” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Str\u00f6m SA selected Planeto\u2019s solution for it\u2019s unique ability simulate low temperature networks simultaneously with geothermal probe field over multiple decades. This capability was essential to validate the designs\u2019 compliance with regulations on geothermal heat extraction.<\/p>\n

[\/et_pb_text][et_pb_heading title=”The village’s heritage was preserved” _builder_version=”4.27.0″ _module_preset=”default” title_level=”h4″ title_font_size=”20px” global_colors_info=”{}”][\/et_pb_heading][et_pb_text _builder_version=”4.27.0″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

Shaped by man since the 12th century, Lavaux is famous for its terraced vineyards and vines planted as far back as Roman times.<\/p>\n

The many laws governing land-use planning at federal, cantonal and municipal level are exceptionally protective. This landscape is even enshrined in the Vaud Constitution. These strong measures have led to UNESCO recognizing Lavaux as a World Heritage Site.<\/p>\n

It is in this context, that Planeto delivered further value though its optimisation algorithms which could reduce the geothermal field size by making use of thermal regeneration and respected the village\u2019s laws and heritage.<\/strong><\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n

-> Access the official report here.<\/a><\/p>\n

[\/et_pb_text][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/Grandvaux-photo.jpg” alt=”Grandvaux” title_text=”Grandvaux photo” _builder_version=”4.27.0″ _module_preset=”default” border_radii=”on|12px|12px|12px|12px” global_colors_info=”{}”][\/et_pb_image][et_pb_divider color=”#DDE4FF” _builder_version=”4.27.0″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” global_colors_info=”{}”][\/et_pb_divider][et_pb_heading title=”InfraWatt Innovation award Winner – 2026″ _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ title_font_size=”28px” custom_padding=”0px|||||” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″][\/et_pb_heading][et_pb_image src=”https:\/\/planeto-energy.ch\/wp-content\/uploads\/2026\/03\/infrawatt.jpg” _builder_version=”4.27.4″ _module_preset=”default” title_text=”infrawatt” border_radii=”on|12px|12px|12px|12px” hover_enabled=”0″ sticky_enabled=”0″][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n

At the 2026 District Heating Forum, InfraWatt presented the 2026 Innovation Award \u2013 Thermal Networks, recognizing this project as a decisive contribution to the decarbonization of heat and cooling supply in Switzerland.<\/strong><\/p>\n

-> Find out more here <-\u00a0<\/strong><\/a><\/p>\n

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Who supporting us<\/span><\/p>\n

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Project supported by<\/h5>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row use_custom_gutter=”on” gutter_width=”2″ _builder_version=”4.27.0″ _module_preset=”default” custom_margin=”60px||0px||false|false” custom_padding=”0px||0px||false|false” locked=”off” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.17.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”http:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/05\/Logo_RGB_farbig_positiv.png” alt=”Swiss confederation logo” title_text=”Logo_RGB_farbig_positiv” align=”center” _builder_version=”4.27.0″ _module_preset=”default” module_alignment=”center” max_height=”80px” custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

How Planeto helped Str\u00f6m SA bring geothermal energy to a historic UNESCO siteUsing Planeto’s software, Str\u00f6m SA developed a groundbreaking sustainable solution that could revolutionize energy systems for thousands of historic villages worldwide.

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”Discover<\/span><\/a><\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div><\/p>","protected":false},"author":2,"featured_media":0,"parent":730,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-704","page","type-page","status-publish","hentry"],"yoast_head":"\n5th Generation Shallow Geothermal Heating and Cooling - Planeto<\/title>\n<meta name=\"description\" content=\"Planeto helped Str\u00f6m bring 5th generation heating and cooling energy with shallow geothermal energy to a UNESCO world site in Grandvaux\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/planeto-energy.ch\/it\/customer-stories\/strom-sa\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Geothermal energy in UNESCO Grandvaux\" \/>\n<meta property=\"og:description\" content=\"Planeto helped Str\u00f6m bring geothermal energy to a history UNESCO site in Grandvaux, to revolutionize energy systems for thousands of villages\" \/>\n<meta property=\"og:url\" content=\"https:\/\/planeto-energy.ch\/it\/customer-stories\/strom-sa\/\" \/>\n<meta property=\"og:site_name\" content=\"Planeto\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-04T16:39:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/06\/Thumbnail-Home.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Geothermal energy in UNESCO Grandvaux\" \/>\n<meta name=\"twitter:description\" content=\"Planeto helped Str\u00f6m bring geothermal energy to a history UNESCO site in Grandvaux, to revolutionize energy systems for thousands of villages\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/planeto-energy.ch\/wp-content\/uploads\/2025\/06\/Thumbnail-Home.png\" \/>\n<meta name=\"twitter:label1\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/planeto-energy.ch\\\/customer-stories\\\/strom-sa\\\/\",\"url\":\"https:\\\/\\\/planeto-energy.ch\\\/customer-stories\\\/strom-sa\\\/\",\"name\":\"5th Generation Shallow Geothermal Heating and Cooling - 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