power sytem photovoltic

7/29/2019 Power sytem photovoltic

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xx. Planning and dimensioning (PV roof)

SolarWorld Workshop


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Agenda

Basics about Roof Structures and Types Roof types

Mounting types

Roof sealing

Loads Wind

Assembly and Installation

Mounting Systems offered by SolarWorld

Sunfix Plus

Sunfix Flat roof

Sunfix Ground Mount

Module damage and planning errors


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SolarWorld Questionaire

Project name, commission

Generator size, module type

Module direction

Location

Building structure, size and construction

Dimensional drawing

Roof covering type

Communication components?

Load information (for own consumption)


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Roof top basics

Functions of a roof

SnowRain Sun

Attic

Shade and wheater

protection


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Roof top basics

Roofs can be differentiated by the inclination:

Flat roofs: Inclination < ca. 5 (Sometimes up to 10)

Slightly pitched roofs: Inclination 5 to 22

Pitched roofs: Inclination 22 to 45

Highly pitched roofs: Inclination > 45


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Roof top basics


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Roof top basics


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Roof top basics


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Mounting types

Additive solution

Integrated solution

Additive solution Integrated solution Additive solution Integrated solution Additive solution Integrated solution Additive solution Integrated solution Free field solution

Pitched Roofs Flat Roofs Fascades Sun Shades

Mounting Types


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Roof sealing

Standard Tile Plain Tile

Standard Tile on battens Standard Tile
http://upload.wikimedia.org/wikipedia/commons/3/38/Harzer_Pfanne_-_Gesamtbild.jpghttp://upload.wikimedia.org/wikipedia/commons/e/e4/Harzer_Pfanne_auf_Dachlattung.JPGhttp://upload.wikimedia.org/wikipedia/de/f/f2/Biberschwanz-3teilig-Doppel.jpg


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Roof sealing

Kalzip steel roofs for steel purlins

Kalzip steel roof with insulation

DPA roof sealing foile

Slate tiles
http://upload.wikimedia.org/wikipedia/commons/1/1f/Ro-Schiefer.jpg


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Loads- Important for Stress calculation

Drainage system, calculation should be referred to the century rain*

Load increase!!!

Additional Snow load (if required!)

Already existing objects on, or under the roof are they

included in the stress load calculation ???

Already existing objects on the roof are they included in the

stress load calculation ???


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Stress calculation is one of the most important parts in a roof top system

Additional weight has to be load on the roof, if a fixing of the structure is not possible,

On flat roofs the additional load can range from 17 kg/m to 80 kg/m

On slope roof additional 12.68 kg/m (Solarworld Sunmodule SW poly) weight +

mounting structure (1.5 to 3.5 kg/m)

Loads- Stress Calculation


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Wind load

Solar systems on exposed locations need special attention!!!

pressure suction

Force acting on the Module area:

- Lift up forces

- Break over forces

- Slide forces

Force acting on the roof:- Compressive force (total of wind load

,module and mounting structure load



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Wind loads

Wind loads need to be considered when planning and designing PV Systems and Structures Two types of forces that can act of structures and modules:

Suction Load (Due to wind)

Pressure load (Due to Snow)

Suction Load Pressure load

Need to ensure these values are not exceeded at the location of installation

Information to take into account:

Wind Speeds in the region

Installation height above ground level

Geography around installation Site (Urban Area, Open space, Agricultural land, Sea

side etc.)



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4-25Netzgekoppelte Photovoltaikanlagen

Shade reduces the energy generation


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4-26

Movements of shadows over a day


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Shading Analyses, shading shets

Height

Location: Freiburg, southern Germany(48 N)

We want that no shading occurs onnoon at the 21st of December

What angle does the sun have with thehorizon on the 21st of December? (23.5)

90- longitude-declination= sun angle

90 - 48 - 23.5 = 18.5

What is the minimum distance x toguarantee that there is no shading onnoon?

X = l * (cos + sin / tan 18.5)

In general it is always a compromise:Optimizing!

Suntool use optimize factorsx

=25

18.5l = 1.67m


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xx. Product Portfolio Mounting Structure

SolarWorld Workshop


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SolarWorld mounting systems
http://localhost/var/www/apps/conversion/tmp/scratch_7/25_Sunfix_Flachdach.ppthttp://c/Documents%20and%20Settings/karsten.loehken/My%20Documents/02%20Pr%C3%A4sentationen/02%20SolarWorld/01%20AD%20Pr%C3%A4sentation/Gelb/21_Sunfix_plus.ppthttp://localhost/var/www/apps/conversion/tmp/scratch_7/27_Sunfix_Freifl%C3%A4che.ppt


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Sunfix plus

Individual adoption to the roof

construction and stat staticrequirements

Ideal and safe use of the installing

area

Pre-assembled components

guarantee a fast installation Static calculations within the Sunkit

by SolarWorld allows planning

reliability


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Example for the installation of Sunfix plus


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General Innovations

Side-connection of roof hooks

Assembly-aid for fixation of screws

Less connection points

Pre-assembled parts

Lower system weight


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General Information Roof Hooks

Roof hooks are offered for all common tile roofs

Hooks for battens with 24 and 30 mm height are available

Every roof hook (except Universal) is available in two editions, 0 and 90, so profiles

can be mounted vertical and horizontal

Selection of the suitable roof hook is calculated by the SolarWorld Team

Part dimensioning results from the static demands of the location (Optimal roof hooks

and profiles will be chosen)


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Roof Hooks General Changes

Corrugation increases the footing

Elongated holes in every roof hook

Simple adjustment of height

Roof Hook Universal:

increased adjustability due to largerelongated hole


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Roof Hooks Overview

Eco/Medium 0

Roof Hook Max 90

Eco/Medium 90

Roof hook for plain tile 90

Roof Hook Uni

Roof hook for slate 0


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Flanges - Overview

Double-flange Delivered in parts

Version M10/M12 and M12

long (Sandwich roofs)

Single-flange Version M10/M12

Application on fibre-cement corrugated sheet roofs,

trapezodial sheet, sandwich roof and various roofs for a

universal installation.


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Further mounting solutions

Special clamps for specialized roof types: Kalzip roofing

Zambelli Ribroof roofing

Standing seam roofing


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Aluminium Profile Types

Fix Plus 1 Fix Plus TFix Plus 2Fix Plus 3Fix Plus 4Fix Plus 5

- Larger profiles used for longer clamping distance and high load withstand ability

- Fix Plus T can be used for roof sheets which can be riveted (Thickness


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Trapezodial sheets mounting solution


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Profile Connector

Fitting to each aluminium

supporting profile

Insertion into the hollow chamberof the aluminium profile No additional bolts necessary!

Adjustment of linear extension bya spacer

Increase of the load capacity due

to a second connector (Profiles FixPlus 1 and 2)


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Profile clamp


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Module fastening

M8-Screw with Torx-drive (T40)

Press fitted and free-turning clamping washer

Additional benefit: Grounding between module frame and

mounting system

Spacer Edge will be assembled afterwards

Slot nut with assembly aid:

Pre-assembly and assembly aid allow a fast and safe mounting ofsolar modules


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Summary

Forceful further development in consideration of

Market requirements

User feedback

Mounting effort is significantly reduced through

Optimized parts

Pre-assembled units

Less parts in direct comparison to the preceding product

Optimal adjustment to the location

Integrated grounding in the module fastening set

f


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Module fastening

M8-Screw with Torx-drive (T40)

Press fitted and free-turning clamping washer

Additional benefit: Grounding between module frame and

mounting system

Spacer Edge will be assembled afterwards

S fi fl t f t


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Sunfix flat roof system

Connection to flat roofs without

ballastation Connection via Hanger bolts, Rivets,

Double-flange etc.

Optional ballastation without

breaching roofing

Optimal ventilation

S fi fl t f t
http://localhost/var/www/apps/conversion/tmp/scratch_7/Flachdach.wmv


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Flat roof mounting system for horizontal tilting

Sunfix flat roof system

Fl hd h h h bt


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Flachdachrahmen - verschraubt

Flat roof mounting system for horizontal tilting

Sh di i t l


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Height

Pitch Distance

Prevention of shading between the module rows

Shading intervals

A li ti fl t f t


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Application flat roof system



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Application details


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Roof connection possible trough ballastation or screws:

Similar parts used as in the rooftop system

- Hanger bolts

- Rivets

- Double-flange etc.

Comparison of ballastation :

Ballastation 6 module 223 - 349 Kg

Depends on the building site:

(Wind load, snow load, height above MSL, roof pitch, building height)

.

Application details

Sunfix Freifeld Montagesystem


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Sunfix-Freifeld Montagesystem

Profiles made of aluminum.

Screw connections made of stainlesssteel V2A.

Foundation via

Earth screws

Concrete foundation

Module tilt angle adjustable between 20

and 40.

Ground pitch compensation in X-axis up

to +/- 10

Module rows van be adjusted by

+/-6.

Sunfix Freefield


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The mounting system allows

ground pitch compensation in the

range of +/-10 in X/Z plane and

+/- 6 in Y/Z plane.

The tilt angle of the modules can be adjusted

to the local optimums for the site in the range of

20 to 40using telescopic legs.

Sunfix Freefield

Mounting Sunfix free field


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Mounting Sunfix free field

Application for Sunfix free field


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Application for Sunfix free field

Any questions?


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Any questions?


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Thank you for your attention!