{"id":55743,"date":"2020-07-21T15:33:50","date_gmt":"2020-07-21T13:33:50","guid":{"rendered":"https:\/\/velasolaris.com\/apparthotel-in-bern\/"},"modified":"2025-04-24T09:16:58","modified_gmt":"2025-04-24T07:16:58","slug":"ice-energy-storage-and-pv-t-apparthotel-in-bern","status":"publish","type":"post","link":"https:\/\/www.velasolaris.com\/en\/ice-energy-storage-and-pv-t-apparthotel-in-bern\/","title":{"rendered":"Aparthotel in Bern"},"content":{"rendered":"\n
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Ice energy storage and PV-T: Example commercial building <\/h1>\n
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A globally unique flagship project<\/p>\n <\/div>\n\t\t\t\t <\/div>\n <\/div>\n\t\t <\/div>\n\n\n<\/section>\n\n\n\n\t \n

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Innovative energy concept that combines ice energy storage with PV-T<\/h2>\n\n\n\n

On the former site of Gebr\u00fcder M\u00fcller AG at Murtenstrasse 147 in Bern, an apartment hotel with around 200 apartments, commercial premises, and rental apartments was built until May 2022. The lighthouse project is unique in the world: an ice energy storage tank combined with a Hybrid Solar Panels<\/a> (PV-T) on the roof will cover the entire demand for heating energy, hot water, and electricity.\u00a0 In summer, the ice storage unit ensures pleasantly cool room temperatures.\u00a0 The building is planned without fossil backup heating. The project came about thanks to Peter \u00d6sch: As the owner of the company M\u00fcller AG, he pursued the clear vision of constructing a sustainable and, at the same time, highly efficient energy-operated building on his land.\u00a0 The company Marti Gesamtleistungen AG was commissioned as the general contractor. The overall energy concept, with the combination of PVT and ice storage of company B-Solartec was able to prevail over well-known competitors. “The PVT technology was absolutely convincing from a technical and economic point of view”, says Michael Geissb\u00fchler, B-Solartec AG<\/a>.\u00a0<\/p>\n\n\n\n

Variant comparison with Polysun<\/h2>\n\n\n\n

In the further course of the project, energy system simulations were central: The optimal dimensioning of the ice storage tank, the surface area of the PV-T system, and the design of a two-stage heat pump<\/a> storage tank in combination with the ice energy storage tank were simulated, taking into account various temperature scenarios. “One scenario always includes a significant temperature increase over the next 30 years, with doubled cooling load in summer and 30 percent less heating load in winter,” says Michael Geissb\u00fchler.\u00a0 Using the Polysun<\/a> simulation software, the desired scenarios were quickly calculated, and variant comparisons<\/a> drawn. “The energy system simulation has led to a significant optimization of the overall energy system, with around 10% lower investment costs and 10% higher overall system efficiency. The exchange with the Polysun experts was always competent and collaborative, just as one would wish,” says Michael Geissb\u00fchler.<\/p>\n\n\n

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Michael Geissb\u00fchler<\/p>

B-Solartec AG <\/p>\n

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“With the Polysun simulation software and through personal exchanges with Vela Solaris experts, the energy system could be simulated quickly and reliably. I was able to gain confidence that the system would function even under different temperature scenarios and that the control logic of the hydraulics would be efficiently designed.\u201d<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/span> Previous<\/span> <\/a> <\/span> Next<\/span> <\/a>\n

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    Key points of the project<\/h2>\n\t \n\t\t\t \n\t\t\t\t\t\t\t\t\t \n\t\t\t
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    Client<\/strong><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t

    B-Solartec<\/p>\n<\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t

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    Energy system components for simulation<\/strong><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t

    PVT solar system, heat pump, ice storage tank, buffer tank heating energy, hot water tank<\/p>\n<\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t

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    Vela Solaris service<\/strong><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t

    Performance of complete system simulations with Polysun software, taking into account various temperature scenarios and system designs.<\/p>\n<\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t

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    Result<\/strong><\/p>\n<\/div><\/div>\n\t\t\t\t\t\t\t

    Reduction of investment costs by 10% and increase of overall energy system efficiency by 10% (annual performance factor). Successful testing of energy system operation under various temperature scenarios.<\/p>\n<\/div><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t <\/div>\n\t\t\t \n\t\t\t \n\t\t\t\t\t\t\t \n\t\t\t \n\t\t\t \n\t\t\t \n <\/div>\n\n <\/div>\n <\/div>\n\t\t\t \n<\/section>\n\n \n\t \n\t \n\n\n\n

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    Get in touch<\/p>\n

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    \n\t\t\t\t <\/div>\n\t\t\t\t contact<\/a>\n\t\t\t\t <\/div>\n <\/div>\n\t\t <\/div>\n\n\n<\/section>\n\n\n\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

    Innovative energy concept that combines ice energy storage with PV-T On the former 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