Solar Roof. Building Integrated Solar Roofing Systems

Transcription

1 Solar Roof Building Integrated Solar Roofing Systems

2 FM Logistic - France - work in progress Attractive, emission-free, lightweight and low-maintenance Using solar energy is sensible and safe. Solar energy is an efficient modern technology which provides long-term environmentally friendly energy. Global partnership of specialists Sika and Solar Integrated are international solar roofing system partners. Sika manufactures and supplies high-quality polymeric membranes globally and Solar Integrated is a leading manufacturer and supplier of flexible photovoltaic systems. Sika and Solar Integrated combine their specialist fields and contribute their full expertise to the development of flexible solar roofing systems. These systems combine high-quality roof membranes with high-performance flexible thin-film solar cells. Customers benefit from specific technical expertise and support from both partners. Residence - Lugano, Switzerland Consultancy service: Efficiency calculation System planning Installation planning Wald-Solar-Heim building, Eberswalde, near Berlin

3 Energy Manufacturing process for the flexible PV panels Flexible, durable, high-performance solar cells 3 solar cells lying one on top of another maximize annual energy production Solar Integrated manufactures flexible BIPV (building integrated photovoltaic) solar roofing products at its manufacturing plant in Los Angeles. Solar Integrated is a pioneer in the development and manufacture of flexible solar roofing panels for commercial, industrial and mobile applications. The solar cells (mounted on a stainless steel film and encapsulated to provide long-term resistance to weathering) are connected together and laminated directly onto Sarnafil roofing membranes. Highly efficient even in diffuse light The flexible thin-film solar cells used on the Solar Integrated solar roofing panels generate above average electricity in cloudy conditions. Unaffected by partial shade With each cell having a bypass diode, performance in conditions of partial shade is significantly higher than in traditional modules. Greater efficiency in summer at higher temperatures The self-corrective process when module temperatures rise to above 40 C means that the efficiency of the Triple Junction Technology comes into its own during the summer months. By installing this solar roofing system without rear ventilation, this positive effect is increased. Preal /Pnom(STC) (%) Blue cell Green cell Total Wavelength (nm) Red cell Blue cell Green cell Red cell Spectral sensitivity of a UNI-SOLAR triple junction solar cell Greater efficiency in summer at higher temperatures Advantages: Light Flexible Durable -6-8 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Triple Junction Technology (solar roof) Crystalline modules 2 3

4 Tesco - California - 2 MW solar roof installation Generating clean electricity Clean electricity generated from a solar roof can be fed directly into the national grid, or it can be used to meet a customer s own needs. Approximately 20 m² of surface area is required to generate one kilowatt peak (kwp). Depending on the roof, a 30 kwp solar system can be installed on a roof area of approximately 900 m². In an increasing number of countries, energy suppliers are obliged to pur chase solar energy at fixed prices gover ned by statute. Consequently, solar roofing systems utilizing the statutory feed-in tariff can be operated under highly attrac tive financial conditions. Additional subsidies may be available in the form of tax credits or investment subsidies. Since solar energy is available precisely at peak demand periods around midday, it is often also a worthwhile investment to reduce peak loads and increase security of supply. We would be pleased to advise on possible subsidies applicable in any country where the implementation of a solar roof project is being considered. Feeding power into the national grid Examples of annual electricity production: Munich: 30 kwp 942 kwh/kwp p.a. = 28,260 kwh/year Athens: 30 kwp 1,280 kwh/kwp p.a = 38,400 kwh/year It pays to produce your own electricity.

5 Public relations and corporate responsibility Solar energy is becoming increasingly popular. This is evident from a number of surveys. More and more people regard solar energy as the preferred energy source for the future ahead of all other forms of electricity generation. Clean solar energy saves up to 866 g of CO 2 emissions harmful to the environment for each kilowatt-hour pro duced. The efficiency of this saving is demonstrated by comparing it with using forests as CO 2 sinks. The solar roof unit requires only 2.6 % of the area of forest needed to save an equivalent amount of CO 2. The public relations benefit of using solar technology can be easily exploited in a variety of ways using modern communi - cation technology. Solar energy is: Environmentally friendly Assured technologically advanced Job-creating Responsible Solar energy promotes a positive image! 30 kwp solar roof, 645 m 2 Annual CO 2 saving 25 t/year Area of forest 25,000 m 2 Annual CO 2 storage 25 t/year Example CO 2 saving by a 30 kwp unit in Munich Annual power generation: 30 kwp 942 kwh/kwp p.a. = 28,260 kwh/year Annual CO 2 saving: kg/kwh 28,260 kwh/year = 25,000 kg/year Equivalent area of forest: 1 kg/m 2 p.a. 25,000 kg p.a. = 25,000 m 2 Area of solar roof: 30,000 Wp/46.5 Wp/m 2 = 645 m 2 4 5

6 Economical welding of PV panels Fast and easy to install Solar Roof Solar Roofing systems can be installed quickly and efficiently and require little maintenance thereafter. The Solar Integra ted PV panels are welded using hot air welding tools. The flexibility of the PV panels means that it is possible to walk on the solar roof during installation and for maintenance purposes. Since the roofing is installed over the full area, there is no self-shading of modules. Loss of exposure to the sun due to the flat orien tation of the modules is comparatively modest, thanks to the Triple Junction Tech - nology. In the ideal instance, the entire surface of a roof can be used to generate electricity. This makes it possible to install the system with a speed and ease not known before. The direct current (DC) cables connecting the individual high-performance modules are concealed under a covering strip, inte grating them onto the roof surface to create a seamless appearance. The DC cables are fed to the current con - verter which converts the DC current from the solar cells into alternating current. The solar roof can be used universally on new buildings, on redevelopments and for retrofitting. For this, the PV panels are laid on top of the previously installed roof and welded onto it. There is no need for addi - tional metal supporting structures (which are expensive to install), and no need for a static test. Theoretical level of use of area 100% Loss due to self-shading 0% Generator alignment as preferred Yield in south-facing alignment 92 % Yield in south-west alignment 92 % Traditional crystalline system Theoretical level of use of area 33 % Loss due to self-shading 9% Generator alignment must be south-facing Yield in south-facing alignment 91 % Yield in south-west alignment 87 %

7 TDDK - Dresden, Germany kwp system Guaranteed durability and performance Solar roof low specific weight PV systems are environmentally friendly and robust. They generate clean electricity during their long lifetime and are extremely weather-resistant. Even high wind stresses do not present problems. Separate lightning protection is not required. With its high quality standards, Solar Inte gra ted is able to offer performance war ran ties for up to 20 years. Sika provi des guarantees on the Sarnafil roof sealing and the Sarnafil linear fastening systems (materials and wind uplift calculation). The Solar roofing systems are ideally suited for installation on low-incline roofs on industrial, commercial and larger resi dential buildings. There must be sufficient pitch on the roofs to allow rain water to run off. However, roofs with supporting structures or insulating levels without slopes can easily be equipped with tapered insulation to achieve the necessary pitch. Since the specific weight of the PV system is low, it does not compromise the statics of the roof construction or of the building. There is no need for a special sub const ruc tion, as is required with tradi tional crystal line solar panels. Solar roof, full use of area 4.9 kg/m 2 Propped system > 25 kg/m 2 6 7

8 Sika global integration, local presence Sika is a globally active company in the speciality and construction chemicals business. It has subsidiary manufacturing, sales and technical support facilities in over 70 countries around the world. Sika is THE global market and technology leader in waterproofing, sealing, bonding, dampening, strengthening and the protection of buildings and civil engineering structures. Sika has approx employees worldwide and is therefore ideally positioned to support the success of its customers. Solar Integrated leading provider of building integrated photovoltaic (BIPV) systems Solar Integrated manufactures and supplies highly efficient solar roofing systems using UNI-SOLAR thin film solar cells which are laminated directly onto high-quality Sika Sarnafil roofing membranes. Solar Integrated supports its customers with planning, efficiency costings and by providing technical support during implementation. Solar Integrated also provides warranties of up to 20 years on its solar roofing systems, which are ideally suited for use on warehouses, production facilities, schools, public buildings, shopping centres, residential and office buildings. UNI-SOLAR is a registered trade mark of United Solar Ovonic LLC Sika Solar Integrated Sika Supply Center AG BU Contractors Industriestrasse CH-6060 Sarnen Switzerland Phone Fax solar@ch.sika.com Solar Integrated Technologies GmbH Robert-Koch-Strasse 50 D Mainz Germany Phone Fax germany@solarintegrated.com Our most current General Sales Conditions shall apply. Please consult the Product Data Sheet prior to any use and processing. SOLAR ROOF / / SI GmbH