Load and Mass Verification for DS-3000 VAWT

1. DS-3000 Vertical Axis Wind Turbine
MASS, LOADS AND SETTING-OUT
Henry Kurniadi
Mechanical Engineer
Hi-VAWT Tech. Corp. Ltd.
August 2013
henry@hi-vawt.com.tw

2. 1MASS, LOADS AND SETTING-OUT
August 2013
Contents
Contents ......................................................................... 1
Generic Mass and Loads................................................. 2
Base Plate Drawings for 4 m Mast.................................. 3
Base Plate Drawings for 6 m Mast.................................. 4
Base Plate Drawings for 8 m Mast.................................. 5
Detailed Mass and Loads................................................ 6
Setting-Out ..................................................................... 7

3. 2MASS, LOADS AND SETTING-OUT
August 2013
Generic Mass and Loads
The DS-3000 rotor blades are about 4 m
tall and 4 m in diameter. When installed
(on top of a 4 m mast) the turbine
assembly will apply a vertical load of 7.4
kN. Under maximum wind loading of 60
m/s (134 mph) the lateral force acting
approximately at the center of the
turbine will exert a lateral/horizontal
force of 12.2 kN. Mast loads and weights
should be added to these figures
appropriate to the particular mast length
used.
These loads are indicative only and are
site and installation specific. Loads should
be confirmed with Hi-VAWT prior to
order. It is recommended that
appropriate structural advice is sought
before installation.
Ground installation
Foundation should be installed at least four
weeks (28 days) prior to the turbine
installation. This allows time for concrete to
harden and reach its optimum properties.
Hi-VAWT standard foundation specifications
can be provided for guidance only and should
be checked by a structural engineer following
soil investigations.
Rooftop installation
Fixings for roof mounted turbines on new
build projects can be incorporated into the
building structure at minimal additional cost.
Retrofitted turbines require a steel frame
mounting to carry the loads back to the core of
the building

4. 3MASS, LOADS AND SETTING-OUT
August 2013
Base Plate Drawings for 4 m Mast
This base plate forms part of the DS-3000
mast. To install the mast an anchoring
arrangement capable of withstanding the
loads must therefore be incorporated
into the foundation design.
Base specification: 30 mm thick
galvanized steel baseplate. Eight (8) slots
needed with 33 to 38 mm diameter each
for 8 pcs of M30 anchoring bolts.
1. Mast (4m) 3& 4. M30 capped nut& nut 6. Base plate
2. Gusset 5. Washer 7. Mast seating pad
0%
10%
20%
30%
40%
50%
Racing Mountain Touring Utility
Current
Future
It is essential that the anchoring bolts are galvanized and project from the foundation surface
by at least 100 mm. This projection must be perpendicular to the foundation and positioned
exactly. This allows for the precise fitting of the base plate and the correct alignment of the
working areas for the installation and maintenance positioning.
IMPORTANT NOTE:
Finish the exposed concrete surfaces with wood float or steel trowel. This is an essential
requirement as the base of the mast sits directly on the smooth and leveled concrete surface.

5. 4MASS, LOADS AND SETTING-OUT
August 2013
Base Plate Drawings for 6 m Mast
This base plate forms part of the DS-3000 mast.
To install the mast an anchoring arrangement
capable of withstanding the loads must
therefore be incorporated into the foundation
design.
Base specification: 32 mm thick galvanized steel
baseplate. Eight (8) slots needed with 33 to 38
mm diameter each for 8 pcs of M30 anchoring
bolts.
1. Mast (6m) 3 & 4. M30 capped nut& nut 6. Base plate
2. Gusset 5. Washer 7. Mast seating pad
0%
10%
20%
30%
40%
50%
Racing Mountain Touring Utility
Current
Future
It is essential that the anchoring bolts are galvanized and project from the foundation surface
by at least 100 mm. This projection must be perpendicular to the foundation and positioned
exactly. This allows for the precise fitting of the base plate and the correct alignment of the
working areas for the installation and maintenance positioning.
IMPORTANT NOTE:
Finish the exposed concrete surfaces with wood float or steel trowel. This is an essential
requirement as the base of the mast sits directly on the smooth and leveled concrete surface.

6. 5MASS, LOADS AND SETTING-OUT
August 2013
Base Plate Drawings for 8 m Mast
This base plate forms part of the DS-3000 mast.
To install the mast an anchoring arrangement
capable of withstanding the loads must
therefore be incorporated into the foundation
design.
Base specification: 35 mm thick galvanized steel
baseplate. Eight (8) slots needed with 39 to 44
mm diameter each for 8 pcs of M36 anchoring
bolts.
1. Mast (8m) 3& 4. M36 capped nut& nut 6. Base plate
2. Gusset 5. Washer 7. Mast seating pad
0%
10%
20%
30%
40%
50%
Racing Mountain Touring Utility
Current
Future
It is essential that the anchoring bolts are galvanized and project from the foundation surface
by at least 100 mm. This projection must be perpendicular to the foundation and positioned
exactly. This allows for the precise fitting of the base plate and the correct alignment of the
working areas for the installation and maintenance positioning.
IMPORTANT NOTE:
Finish the exposed concrete surfaces with wood float or steel trowel. This is an essential
requirement as the base of the mast sits directly on the smooth and leveled concrete surface.

7. 6MASS, LOADS AND SETTING-OUT
August 2013
Detailed Mass and Loads
The tables below contain a tabulated list of moments and forces acting on foundations as a
result of a DS-3000 wind turbine on mast of varying heights.
4 m mast for
DS-3000
Mass
475 kg
Vertical
mast &
wind
turbine
under
maximum
wind
condition
Horizontal
force
[kN]
15.0
Overturning
moment
[kN.m]
79.4
Vertical
force
[kN]
12.0
6 m mast for
DS-3000
Mass
700 kg
Vertical
mast &
wind
turbine
under
maximum
wind
condition
Horizontal
force
[kN]
18.3
Overturning
moment
[kN.m]
114.2
Vertical
force
[kN]
14.2
8 m mast for
DS-3000
Mass
875 kg
Vertical
mast &
wind
turbine
under
maximum
wind
condition
Horizontal
force
[kN]
18.2
Overturning
moment
[kN.m]
139.8
Vertical
force
[kN]
15.9
Modal analysis
All structures possess natural frequencies which can be excited when subjected to dynamic load
(e.g. turbine rotation, wind). Therefore, it is important to investigate the dynamic response of
the mast with DS-3000 on top of it. Hi-VAWT have performed modal analysis of its range of mast
sizes. A customized mast must be approved by Hi-VAWT before an installation.

8. 7MASS, LOADS AND SETTING-OUT
August 2013
Setting-Out
If the installation in raised above
the surroundings, a safe
maintenance solution to access
the turbine will need to be
provided.
Adequate drainage will be
required around the foundation
to prevent water pooling and
accelerated corrosion of the
steel structures.
Ensure that the surrounding
ground conditions are conducive
to vehicular access.