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HEW SOLAR CURTAIN

Cel

The proposed project is aimed to achieve evidence that a PV facade in an adjustable curtain shape is suitable for retrofitting a large variety of facades. The PV curtain will provide different services :Besides photovoltaic electricity production the buildings energy performance is improved: reduced cooling loads in summer and reduced heating requirements in winter. The user's benefit will be increased by improved room climate and additional space in form of atriums. The european cooperation in planning, construction, operation and monitoring ensures the spreading of know-how and experience, the exposed site and purpose of the building, the HEW customer's service center ensure maximum communication and acceptance effects and support HEW's own solar promotion activities.
The first part of the official consent (Förmliche Bauvoranfrage) was given in September 1997.
The reductions in energy consumption will result in reduced energy costs (though the energy reduction will not be the only benefit). They are calculated with the average price of the energy substituted (16 Pf/kWh for electricity, 10.5 Pf/kWh for district heat). The PV electricity production is calculated with the price of the German 'grid feeding law' 17.2 Pf/kWh.
An existing high quality office building in the center of Hamburg, the customer's service center of the utility Hamburgische Electricitäts-Werke AG (HEW), requires extensive repairs or replacement of its facade due to poor insulation and weatherproofing. The solution is to leave the existing skin in place eliminating the costs and environmental impact (and tenant impact) of demolition. A new PV/vision glass skin is applied over the old skin at a summer, recycling of heat in winter and cooling of the PV for improved electrical output.
At the center portion of the facade, a steel frame structure is used to pull the new skin farther away from the existing, creating a habitable wintergarden for the use of the public and buildings tenants. One goal of the form of the new skin is to demonstrate that a PV skin is of high architectural quality and visual interest, enhancing an already attractive building. This design has already won two major architectural competitions in Germany and the USA in 1996.
This project will be the first use of a point supported flush-glazed glazing structure for PV, if the authorities will give their agreement to the employment. Crystalline silicium is assigned for the ISPRA-prooved photovoltaic moduls, the capacity will be approximatively 103 kWpeak, grid connected.

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HAMBURGISCHE ELECTRICITÄTS-WERKE AG
Wkład UE
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Adres
ÜBERSEERING 12
22297 Hamburg
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