Slide 1 Jul 20, 2006 Viessmann UK
Why use solar energy Global warming Fossil fuels Fuel price increases Green statement Slide 2 Jul 20, 2006 Viessmann UK
Slide 3 Jul 20, 2006 Viessmann UK Choice of Collector - Positioning Vitosol 100 Vitosol 200 Vitosol 300
System Schematics Solar Collectors Solar Collectors Control Boiler Hot Water Cylinder Boiler Cylinder Slide 4 Jul 20, 2006 Viessmann UK
Solar Coverage (Europe) Slide 5 Jul 20, 2006 Viessmann UK
Solar Radiation Slide 6 Jul 20, 2006 Viessmann UK
Orientation and Inclination Slide 7 Jul 20, 2006 Viessmann UK
Vitosol Solar Collectors Slide 8 Jul 20, 2006 Viessmann UK
Vitosol 100 Flat plate solar collector: 2.3 sq m, Type w Slide 9 Jul 20, 2006 Viessmann UK
System Schematics Slide 10 Jul 20, 2006 Viessmann UK
Panel Installation Slide 11 Jul 20, 2006 Viessmann UK
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Vitosol 200 Vacuum tube solar collector, direct flow Slide 13 Jul 20, 2006 Viessmann UK
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Vitosol 300 Vacuum tube solar collector, heatpipe Sol-Titan coated absorber Energy efficient Duotec double pipe heat exchanger Absorber area: 2 and 3 sq m Slide 18 Jul 20, 2006 Viessmann UK
Vitosol 300 A B C D E Glass vacuum tube Heatpipe Absorber Condenser Double pipe heat exchanger Slide 19 Jul 20, 2006 Viessmann UK
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Green Building Manchester Slide 22 Jul 20, 2006 Viessmann UK
Domestic Solar Systems Standard solar systems include: Solar collectors connection sets pitched tiled roof fixing kit through-roof flexi pipes (1m) auto air vent Solar divicon PS10 expansion vessel Tyfocor LS heating medium air separator fill drain manifold hand fill pump cylinder sensor pocket Vitosolic 100 collector covers Slide 23 Jul 20, 2006 Viessmann UK
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Vitocell B 300 Solar cylinder with two heating coils - lower coil for solar - upper coil for boiler Manufactured from high alloy stainless steel for unvented operation No sacrificial anode necessary Cylinder capacity: 300 and 500 litres Slide 25 Jul 20, 2006 Viessmann UK
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Solar system sizing (1) Domestic hot water cylinder capacity V cyl = 2. Vp. P. (Th( Tc) (Tdhw Tc) where: Vcyl is minimum dhw cylinder capacity Vp is daily hot water consumption per person (typically 30 50 litres at 45 deg C) P is the number of people in the household Th is the temperature of the hot water used at the tap Tc is the temperature of the cold mains water Tdhw is the cylinder storage temperature Slide 27 Jul 20, 2006 Viessmann UK
Solar System Sizing (2) Commercial Accurate water measurement Available roof space Orientation Inclination Shading Slide 28 Jul 20, 2006 Viessmann UK
Typical large scale solar system Slide 29 Jul 20, 2006 Viessmann UK
Definition of a Large Solar System Effective solar collector area >20 M2 Stored fluid volume > 2000 litres Slide 30 Jul 20, 2006 Viessmann UK
Dimensioning of a Large Solar System Solar fraction - percentage of annual dhw requirement covered by solar Solar yield - solar energy collected per square meter of solar collector area per annum Objective? maximum possible solar fraction OR maximum possible solar yield Slide 31 Jul 20, 2006 Viessmann UK
Dimensioning Maximum solar fraction or maximum solar yield? Solar fraction (%) 70 60 50 40 30 20 10 small scale solar large scale solar 0 350 400 450 500 550 600 Solar yield (kwh/sqm.a) Slide 32 Jul 20, 2006 Viessmann UK
Dimensioning 70 Example: 4000 litres per day DHW requirement Solar fraction (%) 60 50 40 30 20 10 0 X 50 100 150 200 250 300 350 400 450 Solar collector area (sqm) Slide 33 Jul 20, 2006 Viessmann UK
Planning overview Determine actual domestic hot water requirement Calculate optimum solar collector area Determine actual solar collector area and solar field layout Select heat exchangers, buffer vessels, DHW cylinders Slide 34 Jul 20, 2006 Viessmann UK
Determining DHW requirement Consider periods of low water usage and high solar input. Solar input must not exceed DHW demand!! Slide 35 Jul 20, 2006 Viessmann UK
Determining DHW Requirement Long term actual water measurement Underestimate on your calculations! 25 litres/day @ 60 º C as a maximum figure. Slide 36 Jul 20, 2006 Viessmann UK
Calculating Optimum Solar Collector Area collector area which in periods of lowest DHW usage does not lead to excess solar energy input. 30 35 % solar fraction is desirable. 13 17 M 2 solar collector per 1000 litres/day DHW requirement Slide 37 Jul 20, 2006 Viessmann UK
Determining Actual Solar Collector Area Available roof area for solar panels. Collector fields the number of collectors grouped together. Pitched roofs Flat roofs Slide 38 Jul 20, 2006 Viessmann UK
Solar Circuit Components Buffer vessels - 50 litres/sqm solar collector area DHW preheat cylinder 15% of daily DHW requirement DHW cylinders standard calculation (as if no solar system existed) Slide 39 Jul 20, 2006 Viessmann UK
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Case study Green Building, Manchester Slide 43 Jul 20, 2006 Viessmann UK
Case study Green Building, Manchester Apartment block with 32 flats DHW and space heating provided centrally. 60 M 2 Vitosol 300 vacuum tube solar collectors 3 x 900 litres buffer vessels 350 litre DHW preheat cylinder 3 x 500 litres DHW cylinders 5 x 60 kw Vitodens gas condensing boilers Slide 44 Jul 20, 2006 Viessmann UK
Case study Green Building, Manchester 60 sqm Vitosol 300 3 x 500 litre dhw cylinders 350 litre dhw preheat cylinder 3 x 900 litre buffer vessels Slide 45 Jul 20, 2006 Viessmann UK
Case study Green Building, Manchester Anticipated annual performance Solar fraction 31% Solar yield 604 kwh/m 2 Solar energy to dhw 38 760 kwh Solar system efficiency 56 % Natural gas saving 4850 m3 CO2 emissions avoided 11,000 kg Slide 46 Jul 20, 2006 Viessmann UK
Case study Green Building, Manchester Slide 47 Jul 20, 2006 Viessmann UK
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