Tables of costs and specifications
What follows is a "core dump" of the spreadsheets that I am
using to calculate heliostat costs and specifications. I am posting
them to give people an idea of some of the design and cost factors
under consideration. I have been promising certain people to show them
some numbers and I felt it was taking too long to get everything pretty;
at the very least I should show how far I've gotten.
I welcome comments and questions, but let's get
a few things perfectly clear: the so-called "business plan" is just a
few numbers I am tossing around - it is far from complete and it is
missing some very important elements. This is a work in progress.
- the costs of a receiver and generator systems are not covered.
They can be expected to be at least equal to the cost of the heliostat system.
- most of the electronics and calibration subsystems are not covered
in the heliostat costs, but I believe that they will be quite small in the
end. Please ignore the category "set of other pieces" in the
RH1.0 specification table - it is left-over from RH0.1.
- Sometimes the formatting is difficult to read - this is due to imperfect
translation from spreadsheet to HTML format. I am using StarOffice 5.0
for Linux, by the way.
Now, with all of that out of the way, here is the main number that you
want to know: the mini-heliostats will cost
US$45.95/m2
(or
Sfr68.87/m2)
of reflective surface.
Overview
Conventional vs MiniHeliostat costs
Mini_heliostat costs
Business plan
RH1_0 specifications
Miscellaneous material costs
Mold costs
Gear pricing schemes
Gear train specs
RH0_1 specifications
Sheet 1: Conventional vs MiniHeliostat costs
Comparison of the costs of a 150m2 second generation stretched-membrane heliostat*, a 150m2 first generation-style glass mirror heliostat*, and 150m2 of Mini-Heliostats** |
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|
Stretched-Membrane |
|
First-Generation |
|
Mini-Heliostats |
|
Mini-Heliostats |
|
|
($) |
($/m2) |
($) |
($/m2) |
($) |
($/m2) |
(Sfr) |
(Sfr/m2) |
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|
Mirror Module and Support Structure |
5,136.45 |
34.24 |
7,024.02 |
46.83 |
2,225.49 |
14.84 |
3,338.23 |
22.25 |
Materials |
4,357.33 |
29.05 |
6,244.90 |
41.63 |
1,299.56 |
8.66 |
1,949.34 |
13.00 |
Labor |
611.52 |
4.08 |
611.52 |
4.08 |
925.93 |
6.17 |
1,388.89 |
9.26 |
Equipment (including interest) |
157.66 |
1.05 |
157.66 |
1.05 |
0.00 |
0.00 |
0.00 |
0.00 |
Consumables |
9.94 |
0.07 |
9.94 |
0.07 |
0.00 |
0.00 |
0.00 |
0.00 |
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|
|
|
|
|
|
|
|
Drive and Pedestal |
2,067.00 |
13.78 |
2,067.00 |
13.78 |
3,204.73 |
21.36 |
4,807.09 |
32.05 |
Drive Assembly |
1,694.00 |
11.29 |
1,694.00 |
11.29 |
1,132.56 |
7.55 |
1,698.84 |
11.33 |
Pedestal |
266.00 |
1.77 |
266.00 |
1.77 |
1,527.78 |
10.19 |
2,291.67 |
15.28 |
Assembly Drive/Pedestal/Electric |
107.00 |
0.71 |
107.00 |
0.71 |
544.39 |
3.63 |
816.58 |
5.44 |
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|
Foundation |
934.00 |
6.23 |
934.00 |
6.23 |
46.30 |
0.31 |
69.44 |
0.46 |
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|
|
Labor (Field Site) |
251.26 |
1.68 |
251.26 |
1.68 |
185.19 |
1.23 |
277.78 |
1.85 |
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Buildings (Including Interest) |
16.95 |
0.11 |
16.95 |
0.11 |
0.00 |
0.00 |
0.00 |
0.00 |
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|
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|
|
Field Wiring |
434.00 |
2.89 |
434.00 |
2.89 |
77.78 |
0.52 |
116.67 |
0.78 |
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|
|
Total Heliostat Cost |
8,839.66 |
58.93 |
10,727.23 |
71.51 |
5,739.47 |
38.26 |
8,609.21 |
57.39 |
ROI and Taxes @ 20% |
1,767.93 |
11.79 |
2,145.45 |
14.30 |
1,147.89 |
7.65 |
1,721.84 |
11.48 |
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|
|
Selling Price (unadjusted for PPI) |
10,607.59 |
70.72 |
12,872.68 |
85.82 |
6,887.37 |
45.92 |
10,331.05 |
68.87 |
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|
|
|
|
|
Selling Price in 1996 US dollars |
12,860.53 |
85.74 |
15,606.70 |
104.04 |
6,887.37 |
45.92 |
10,331.05 |
68.87 |
|
($) |
($/m2) |
($) |
($/m2) |
($) |
($/m2) |
(Sfr) |
(Sfr/m2) |
|
Stretched-Membrane |
|
First Generation |
|
Mini-Heliostats |
|
Mini-Heliostats |
|
|
|
|
|
|
|
|
|
|
* The original costs were reported in 1988 US$. The following data were used to convert to 1996 values. |
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Dollar conversion factors between 1988 and 1996 accounting for 1988 and 1996 accounting for inflation of the cost of CAPITAL EQUIPMENT (1982=100, source:BCI) |
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Year |
Producer Price Index |
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1988 |
113 |
|
|
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|
1996 |
137 |
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|
RATIO: |
1.21 |
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** The Mini-Heliostat costs have been calculated in Swiss francs. Use the following conversion table. |
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Sfr to US$ conversion factor |
0.67 |
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|
US$ to Sfr conversion factor |
1.50 |
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*Source of data for stretched membrane costs: |
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"Improved Stretched Membrane Heliostat Mirror Module Development", |
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by K.J. Beninga, B.L. Butler, and J.A. Sandubrae |
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Science Applications International Corporation (SAIC) |
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10401 Roselle Street |
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San Diego, California 92121, USA |
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page 139, Table 4 |
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Solar Thermal Technology - Research Development and Applications: |
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proceedings of the fourth (1988) international symposium |
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edited by B.P. Gupta |
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1990 Hemisphere |
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ISBN 1-56032-095-8 |
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Sheet 2: Mini_heliostat costs
Mini-heliostats cost (Sfr) |
150 |
m2 under consideration |
|
|
for X square metres |
0.54 |
m2/assembly |
|
|
|
|
|
|
|
|
(Sfr) |
(Sfr/m2) |
(Sfr/assembly) |
% of total |
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|
|
|
|
Mirror Module(s) |
3,338.23 |
22.25 |
12.02 |
32 |
Materials |
1,949.34 |
13.00 |
7.02 |
19 |
Labor |
1,388.89 |
9.26 |
5.00 |
13 |
Equipment (including interest) |
0.00 |
0.00 |
0.00 |
0 |
Consumables |
0.00 |
0.00 |
0.00 |
0 |
|
|
|
|
|
Drive and Pedestal/Support structure |
4,807.09 |
32.05 |
17.31 |
47 |
Drive Assembly |
1,698.84 |
11.33 |
6.12 |
16 |
Pedestal/Support structure |
2,291.67 |
15.28 |
8.25 |
22 |
Assembly Drive/Pedestal/Electric |
816.58 |
5.44 |
2.94 |
8 |
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|
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|
Foundation |
69.44 |
0.46 |
0.25 |
1 |
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Labor (Field Site) |
277.78 |
1.85 |
1.00 |
3 |
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Buildings (Including Interest) |
0.00 |
0.00 |
0.00 |
0 |
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|
Field Wiring |
116.67 |
0.78 |
0.42 |
1 |
|
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|
|
|
Total Heliostat Cost |
8,609.21 |
57.39 |
30.99 |
83 |
ROI and Taxes @ 20% |
1,721.84 |
11.48 |
6.20 |
17 |
|
|
|
|
100 |
Selling Price |
10,331.05 |
68.87 |
37.19 |
|
|
(Sfr) |
(Sfr/m2) |
(Sfr/assembly) |
% of total |
Sheet 3: Business plan
Rough estimates of pay-back time and income |
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Scenario Descriptions |
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|
Worst Case |
Best Case |
|
|
Solar Electricity Value |
Conversion System |
Pay-back time (heliostats only) |
years |
8.09 |
0.65 |
|
Worst Case |
low (Swiss legal limit) |
low efficiency |
Target gross annual income |
Sfr/year |
50000.00 |
50000.00 |
|
Best Case |
high (incentive programs) |
high efficiency |
Target gross annual income |
$/year |
33333.33 |
33333.33 |
|
|
|
|
Cost of needed heliostats |
Sfr |
404567.98 |
32365.44 |
|
|
|
|
Cost of needed heliostats |
$ |
269711.99 |
21576.96 |
|
|
|
|
Cost of heliostats per unit area |
Sfr/m2 |
68.87 |
68.87 |
|
|
|
|
Cost of heliostats per unit area |
$/m2 |
45.92 |
45.92 |
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|
|
|
Area of heliostats needed |
m2 |
5874.06 |
469.92 |
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|
|
|
Income per square metre per year |
Sfr/m2year |
8.51 |
106.40 |
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Income per square metre per year |
$/m2year |
5.67 |
70.93 |
|
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|
|
Value of electricity |
Sfr/kWh |
0.16 |
1.00 |
|
|
|
|
Value of electricity |
$/kWh |
0.11 |
0.67 |
|
|
|
|
Direct sunshine |
kWh/m2year |
700 |
700 |
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|
|
|
Efficiency of engine & receiver |
|
0.1 |
0.2 |
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|
|
|
Efficiency of mirrors |
|
0.8 |
0.8 |
|
|
|
|
Efficiency of generator |
|
0.95 |
0.95 |
|
|
|
|
Efficiency of system |
|
0.08 |
0.15 |
|
|
|
|
Peak direct insolation |
kW/m2 |
0.94 |
0.94 |
|
|
|
|
Peak thermal power |
kW |
4413 |
353 |
|
|
|
|
Peak mechanical power |
kW |
441 |
71 |
|
|
|
|
Peak electrical power |
kW |
419 |
67 |
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Sfr to US$ conversion ratio |
0.667 |
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Sheet 4: RH1_0 specifications
ITEM |
MATERIAL |
AMOUNT |
|
COST |
|
FRACTION |
|
|
quantity |
unit |
Sfr/unit |
Sfr/assembly |
% |
Total |
|
0.54 |
m2 |
45.82 |
24.74 |
100.0 |
|
|
quantity |
unit |
Sfr/unit |
Sfr/assembly |
|
Reflectors |
|
6 |
|
1.17 |
7.02 |
28.4 |
mirror surface |
aluminum-coated mylar |
0.09 |
m2 |
2.88 |
0.26 |
|
mirror backing |
PVC plaque, 1 mm thick |
0.09 |
m2 |
9.78 |
0.88 |
|
mirror frame |
reflector part |
1 |
|
0.03 |
0.03 |
|
LENGTH MIRROR |
|
0.3 |
m |
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|
Reflector mounting and gear trains |
|
6 |
|
1.02 |
6.12 |
24.7 |
azimuth gear train |
azimuth drive gear train |
1 |
|
0.30 |
0.30 |
|
elevation gear train |
elevation drive gear train |
1 |
|
0.57 |
0.57 |
|
inclination support |
reflector part |
2 |
|
0.03 |
0.06 |
|
mirror support |
reflector part |
2 |
|
0.03 |
0.06 |
|
reflector base |
reflector part |
1 |
|
0.03 |
0.03 |
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Support Structures |
|
1 |
|
8.25 |
8.25 |
33.3 |
pipe with holes |
PVC electrical conduit 16 mm diameter |
8.1 |
m |
0.85 |
6.89 |
|
pipe T joints |
PVC T 16 mm diameter |
2 |
|
0.10 |
0.20 |
|
pipe elbows |
PVC elbow 16 mm diameter |
4 |
|
0.10 |
0.40 |
|
legs |
PVC electrical conduit 16 mm diameter |
0.9 |
m |
0.85 |
0.77 |
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Wiring system |
|
1 |
|
0.42 |
0.42 |
1.7 |
power line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
|
signal line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
|
ground line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
|
power connector |
stainless |
1 |
|
0.10 |
0.10 |
|
signal connector |
stainless |
1 |
|
0.10 |
0.10 |
|
ground connector |
stainless |
1 |
|
0.10 |
0.10 |
|
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Drive system |
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|
common drive |
|
1 |
|
1.30 |
1.30 |
5.3 |
toy DC motor |
steel, iron |
1 |
|
0.50 |
0.50 |
|
coupling magnets |
iron |
4 |
|
0.10 |
0.40 |
|
common drive gear train |
common drive gear train |
1 |
|
0.40 |
0.40 |
|
|
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|
|
selector drive |
|
1 |
|
1.64 |
1.64 |
6.6 |
toy DC motor |
steel, iron |
1 |
|
0.50 |
0.50 |
|
coupling magnets |
iron |
4 |
|
0.10 |
0.40 |
|
selector gear train |
axis selector gear train |
1 |
|
0.74 |
0.74 |
|
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|
set of other pieces |
|
1 |
|
5.07 |
5.07 |
|
mount |
recycled plastic |
1 |
|
0.07 |
0.07 |
|
batteries |
NiH AA batteries |
4 |
|
1.00 |
4.00 |
|
drive electronics |
1 pole, double throw switches |
2 |
|
0.25 |
0.50 |
|
hermetic case |
PVC electrical box |
1 |
|
0.50 |
0.50 |
|
Sheet 5: Miscellaneous material costs
|
COST |
|
HARDWARE STORE |
WHOLESALERS |
Material |
Sfr |
unit |
Sfr |
Sfr |
ECP300 ? |
16.00 |
m2 |
16.00 |
16.00 |
aluminum-coated mylar |
2.88 |
m2 |
2.88 |
2.88 |
white plastic U profile |
1.00 |
m |
4.39 |
1.00 |
white plastic rectangle profile 3x10mm |
0.45 |
m |
2.45 |
0.45 |
white plastic rectangle profile 5x20mm |
1.50 |
m |
3.82 |
1.50 |
PVC plaque, 1 mm thick |
9.78 |
m2 |
|
9.78 |
PVC electrical conduit 16 mm diameter |
0.85 |
m |
0.67 |
0.85 |
PVC elbow 16 mm diameter |
0.10 |
each |
0.78 |
0.10 |
PVC T 16 mm diameter |
0.10 |
each |
0.98 |
0.10 |
PVC bride 16 mm diameter |
0.10 |
each |
0.57 |
0.10 |
PVC rod, 3 mm diameter |
0.11 |
m |
0.11 |
0.11 |
screw/nut pairs |
0.02 |
pair |
0.10 |
0.02 |
glass mirror tile |
20.00 |
m2 |
49.72 |
20.00 |
PVC electrical box |
0.50 |
each |
3.50 |
0.50 |
reduced motor |
10.00 |
each |
30.00 |
10.00 |
NiH AA batteries |
1.00 |
each |
4.00 |
1.00 |
1 pole, double throw switches |
0.25 |
each |
2.00 |
0.25 |
|
|
|
|
|
Specially fabricated parts |
|
|
|
|
General estimation method: |
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|
|
reflector part |
0.03 |
each |
|
|
array part |
0.07 |
each |
|
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|
|
Assemblies |
|
|
|
|
common drive gear train |
0.40 |
each |
|
|
azimuth drive gear train |
0.30 |
each |
|
|
elevation drive gear train |
0.57 |
each |
|
|
axis selector gear train |
0.74 |
each |
|
|
Sheet 6: Mold costs
MOLD FOR REFLECTOR UNITS |
|
|
Estimate of production mold |
Sfr |
13000.00 |
Mirror area |
m2 |
5874 |
Number of reflectors |
|
65267.34 |
Number of parts per reflector (estimate) |
|
40 |
Cost to do one molding |
Sfr |
1.00 |
Cost per part per molding |
Sfr |
0.03 |
Fixed cost divided by number of parts |
Sfr |
0.00 |
Total cost per reflector part |
Sfr |
0.03 |
|
|
|
MOLD FOR ARRAYS |
|
|
Estimate of production mold |
Sfr |
11000.00 |
Mirror area |
m2 |
5874 |
Number of arrays |
|
10877.89 |
Number of parts per array (estimate) |
|
30 |
Cost to do one molding |
Sfr |
1.00 |
Cost per part per molding |
Sfr |
0.03 |
Fixed cost divided by number of parts |
Sfr |
0.03 |
Total cost per array part |
Sfr |
0.07 |
Sheet 7: Gear pricing schemes
Mädler - Norm Antrieb AG |
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rebate (%) |
0 |
3 |
10 |
13 |
16 |
26 |
32 |
42 |
|
|
quantity |
1 |
5 |
10 |
25 |
50 |
100 |
250 |
500 |
quantity |
gear type |
teeth |
|
|
cost in Sfr 1996 |
|
|
|
|
|
teeth |
spur, mod 0.5, acetal |
12 |
0.31 |
0.30 |
0.28 |
0.27 |
0.26 |
0.23 |
0.21 |
0.18 |
12 |
EXTRUDED |
20 |
0.52 |
|
|
|
|
0.40 |
|
0.31 |
20 |
|
|
0.52 |
0.50 |
0.47 |
0.45 |
0.44 |
0.39 |
0.35 |
0.30 |
|
|
120 |
2.50 |
|
|
|
|
1.88 |
|
1.48 |
120 |
|
|
2.50 |
2.42 |
2.26 |
2.18 |
2.10 |
1.85 |
1.69 |
1.45 |
|
conic, mod 0.5, acetal |
16 |
0.40 |
|
|
|
|
0.33 |
|
0.28 |
16 |
MOLDED |
|
0.40 |
0.39 |
0.36 |
0.35 |
0.34 |
0.30 |
0.27 |
0.23 |
|
conic, mod 1.0, acetal |
15 |
1.21 |
|
|
|
|
1.00 |
|
0.82 |
15 |
MOLDED |
|
1.21 |
1.17 |
1.09 |
1.05 |
1.01 |
0.90 |
0.82 |
0.70 |
|
|
45 |
3.67 |
|
|
|
|
3.04 |
|
2.50 |
45 |
|
|
3.67 |
3.55 |
3.31 |
3.20 |
3.08 |
2.72 |
2.49 |
2.13 |
|
|
quantity |
1 |
5 |
10 |
25 |
50 |
100 |
250 |
500 |
quantity |
|
|
|
|
|
|
|
|
|
|
|
|
log10 quantity |
0 |
0.7 |
1 |
1.4 |
1.7 |
2 |
2.4 |
2.7 |
|
|
calc. rebate |
3.29 |
6.41 |
8.54 |
12.48 |
16.63 |
22.16 |
32.38 |
43.14 |
|
|
diff^2 |
10.85 |
10.16 |
1.29 |
0.18 |
0.25 |
13.29 |
0.02 |
1.46 |
37.49 |
|
rebate exp. |
0.41 |
|
|
|
|
|
|
|
|
|
rebate coef. |
0.03 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Alfred Güdel AG |
|
|
|
|
|
|
|
|
|
|
|
rebate (%) |
0 |
5 |
10 |
20 |
|
|
|
|
|
|
quantity |
1 |
5 |
10 |
20 |
quantity |
|
|
|
|
gear type |
teeth |
cost in Sfr 1996 |
|
|
|
teeth |
|
|
|
|
spur, mod 0.5, acetal |
12 |
0.30 |
|
|
|
12 |
|
|
|
|
MOLDED |
|
0.30 |
0.29 |
0.27 |
0.24 |
|
|
|
|
|
|
20 |
0.40 |
|
|
|
20 |
|
|
|
|
|
|
0.40 |
0.38 |
0.36 |
0.32 |
|
|
|
|
|
|
120 |
1.60 |
|
|
|
120 |
|
|
|
|
|
|
1.60 |
1.52 |
1.44 |
1.28 |
|
|
|
|
|
conic, mod 0.5, acetal |
16 |
0.43 |
|
|
|
16 |
|
|
|
|
MOLDED |
|
0.43 |
0.40 |
0.38 |
0.34 |
|
|
|
|
|
conic, mod 1.0, acetal |
15 |
0.78 |
|
|
|
15 |
|
|
|
|
MOLDED |
|
0.78 |
0.74 |
0.70 |
0.62 |
|
|
|
|
|
|
45 |
2.33 |
|
|
|
45 |
|
|
|
|
|
|
2.33 |
2.21 |
2.09 |
1.86 |
|
|
|
|
|
|
quantity |
1 |
5 |
10 |
20 |
quantity |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nozag AG |
|
|
|
|
|
|
|
|
|
|
|
rebate (%) |
0 |
4 |
8 |
12 |
16 |
20 |
24 |
80 |
|
|
quantity |
1 |
5 |
10 |
25 |
50 |
100 |
200 |
3276800 |
quantity |
gear type |
teeth |
|
|
cost in Sfr 1996 |
|
|
|
|
|
teeth |
spur, mod 0.5, acetal |
12 |
0.50 |
|
|
|
|
|
|
|
12 |
MOLDED |
|
0.50 |
0.48 |
0.46 |
0.44 |
0.42 |
0.40 |
0.38 |
0.10 |
|
|
20 |
0.70 |
|
|
|
|
|
|
|
20 |
|
|
0.70 |
0.67 |
0.64 |
0.62 |
0.59 |
0.56 |
0.53 |
0.14 |
|
|
120 |
2.70 |
|
|
|
|
|
|
|
120 |
|
|
2.70 |
2.59 |
2.48 |
2.38 |
2.27 |
2.16 |
2.05 |
0.54 |
|
conic, mod 0.5, acetal |
16 |
0.60 |
|
|
|
|
|
|
|
16 |
MOLDED |
|
0.60 |
0.58 |
0.55 |
0.53 |
0.50 |
0.48 |
0.46 |
0.12 |
|
conic, mod 1.0, acetal |
15 |
1.33 |
|
|
|
|
|
|
|
15 |
MOLDED |
|
1.33 |
1.27 |
1.22 |
1.17 |
1.11 |
1.06 |
1.01 |
0.27 |
|
|
45 |
3.98 |
|
|
|
|
|
|
|
45 |
|
|
3.98 |
3.82 |
3.66 |
3.50 |
3.34 |
3.18 |
3.02 |
0.80 |
|
|
quantity |
1 |
5 |
10 |
25 |
50 |
100 |
200 |
3276800 |
quantity |
Sheet 8: Gear train specs
Miscellaneous specs |
|
|
|
|
|
|
|
sun rotation rate |
(RPM) |
0.0007 |
|
|
|
|
|
coasting time of motor |
(seconds) |
0.5 |
|
|
|
|
|
adjustment cycle time |
(seconds) |
0.523 |
|
|
|
|
|
reflector part |
Sfr |
0.030 |
|
|
|
|
|
array part |
Sfr |
0.067 |
|
|
|
|
|
number of reflector parts in gear trains |
|
29 |
|
|
|
|
|
number of array parts in gear trains |
|
17 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Order |
teeth / threads |
reduction of pair |
cumulative reduction |
RPM |
# turns for 0.1° change |
# turns while coasting |
cost |
|
|
|
|
|
|
|
|
common drive |
|
|
|
|
|
|
0.40 |
motor shaft |
0 |
1 |
1 |
2200 |
75 |
18.33 |
|
pinion |
12 |
1 |
1 |
2200 |
75 |
18.33 |
0.067 |
magnet gear |
120 |
10 |
10 |
220 |
7.5 |
1.83 |
0.067 |
"virtual" shaft |
0 |
1 |
10 |
220 |
7.5 |
1.83 |
|
magnet wheel |
0 |
1 |
10 |
220 |
7.5 |
1.83 |
0.067 |
shaft |
0 |
1 |
10 |
220 |
7.5 |
1.83 |
0.067 |
pinion |
12 |
1 |
10 |
220 |
7.5 |
1.83 |
0.067 |
main transmission gear |
120 |
10 |
100 |
22 |
0.75 |
0.18 |
0.067 |
|
|
|
|
|
|
|
|
Order |
teeth / threads |
reduction of pair |
cumulative reduction |
RPM |
# turns for 0.1° change |
# turns while coasting |
cost |
|
|
|
|
|
|
|
|
azimuth drive |
|
|
|
|
|
|
0.30 |
main transmission gear |
120 |
1 |
100 |
22 |
0.75 |
0.18 |
|
axis transmission gear |
12 |
0.1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
shaft |
0 |
1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
worm |
1 |
1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
wormgear |
30 |
30 |
300 |
7 |
0.25 |
0.06 |
0.030 |
shaft |
0 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
worm |
1 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
wormgear |
30 |
30 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
shaft |
0 |
1 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
spur |
20 |
1 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
az gear |
600 |
30 |
270000 |
0.0081 |
0 |
0 |
0.030 |
azimuth |
0 |
1 |
270000 |
0.0081 |
0 |
0 |
|
|
|
|
|
|
|
|
|
Order |
teeth / threads |
reduction of pair |
cumulative reduction |
RPM |
# turns for 0.1° change |
# turns while coasting |
cost |
|
|
|
|
|
|
|
|
elevation drive |
|
|
|
|
|
|
0.57 |
main transmission gear |
120 |
1 |
100 |
22 |
0.75 |
0.18 |
|
axis transmission gear |
12 |
0.1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
shaft |
0 |
1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
worm |
1 |
1 |
10 |
220 |
7.5 |
1.83 |
0.030 |
wormgear |
30 |
30 |
300 |
7 |
0.25 |
0.06 |
0.030 |
shaft |
0 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
shaft |
0 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
shaft |
0 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
miter |
16 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
shaft |
0 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
worm |
1 |
1 |
300 |
7 |
0.25 |
0.06 |
0.030 |
wormgear |
30 |
30 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
shaft |
0 |
1 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
spur |
20 |
1 |
9000 |
0.2444 |
0.01 |
0 |
0.030 |
az gear |
600 |
30 |
270000 |
0.0081 |
0 |
0 |
0.030 |
azimuth |
0 |
1 |
270000 |
0.0081 |
0 |
0 |
|
|
|
|
|
|
|
|
|
Order |
teeth / threads |
reduction of pair |
cumulative reduction |
RPM |
# turns for 15° change |
# turns while coasting |
cost |
axis selector |
|
|
|
|
|
|
0.74 |
motor shaft |
0 |
1 |
1 |
2200 |
37.5 |
18.33 |
|
pinion |
12 |
1 |
1 |
2200 |
37.5 |
18.33 |
0.067 |
magnet gear |
120 |
10 |
10 |
220 |
3.75 |
1.83 |
0.067 |
"virtual" shaft |
0 |
1 |
10 |
220 |
3.75 |
1.83 |
|
magnet wheel |
0 |
1 |
10 |
220 |
3.75 |
1.83 |
0.067 |
shaft |
0 |
1 |
10 |
220 |
3.75 |
1.83 |
0.067 |
worm |
1 |
1 |
10 |
220 |
3.75 |
1.83 |
0.067 |
wormgear |
30 |
30 |
300 |
7 |
0.13 |
0.06 |
0.067 |
shaft |
0 |
1 |
300 |
7 |
0.13 |
0.06 |
0.067 |
bevel |
15 |
1 |
300 |
7 |
0.13 |
0.06 |
0.067 |
bevel |
45 |
3 |
900 |
2.4444 |
0.04 |
0.02 |
0.067 |
shaft |
0 |
1 |
900 |
2.4444 |
0.04 |
0.02 |
0.067 |
circular cam |
0 |
1 |
900 |
2.4444 |
0.04 |
0.02 |
0.067 |
Sheet 9: RH0_1 specifications
ITEM |
MATERIAL |
AMOUNT |
|
COST |
|
|
|
quantity |
unit |
SFr/unit |
SFr/assembly |
Reflectors+Mounting+Support |
|
0.09 |
m2 |
86.09 |
7.75 |
|
|
quantity |
unit |
SFr/unit |
SFr/assembly |
Reflectors |
|
1 |
|
2.40 |
2.40 |
mirror |
glass mirror tile |
0.09 |
m2 |
20.00 |
1.80 |
mirror frame |
white plastic U profile |
0.6 |
m |
1.00 |
0.60 |
LENGTH MIRROR |
|
0.3 |
m |
|
|
|
|
|
|
|
|
Reflector mounting and gears |
|
1 |
|
2.16 |
2.16 |
azimuthal ring gear |
PVC rod, 3 mm diameter |
0.5 |
m |
0.11 |
0.05 |
inclination ring gear |
PVC rod, 3 mm diameter |
0.9 |
m |
0.11 |
0.10 |
azimuthal worm gear |
nylon |
1 |
|
0.03 |
0.03 |
inclination worm gear |
nylon |
1 |
|
0.03 |
0.03 |
inclination gear train |
PVC rod, 3 mm diameter |
0.5 |
m |
0.11 |
0.05 |
azimuthal ring |
white plastic rectangle profile 3x10mm |
1.1 |
m |
0.45 |
0.50 |
inclination support |
white plastic U profile |
0.37 |
m |
1.00 |
0.37 |
mirror support |
white plastic U profile |
0.77 |
m |
1.00 |
0.77 |
fasteners |
screw/nut pairs |
10 |
|
0.02 |
0.20 |
az. axis selector |
PVC rod, 3 mm diameter |
0.3 |
m |
0.11 |
0.03 |
inc. axis selector |
PVC rod, 3 mm diameter |
0.3 |
m |
0.11 |
0.03 |
|
|
|
|
|
|
Support Structures |
|
1 |
|
3.18 |
3.18 |
pipe with holes |
PVC electrical conduit 16 mm diameter |
1.35 |
m |
0.85 |
1.15 |
pipe T joints |
PVC T 16 mm diameter |
2 |
|
0.10 |
0.20 |
pipe elbows |
PVC elbow 16 mm diameter |
4 |
|
0.10 |
0.40 |
fasteners |
screw/nut pairs |
12 |
|
0.02 |
0.24 |
legs |
screw/nut pairs |
4 |
|
0.10 |
0.40 |
reflector bases |
PVC bride 16 mm diameter |
8 |
|
0.10 |
0.80 |
|
|
|
|
|
|
Wiring |
|
0 |
|
0.42 |
0.00 |
power line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
signal line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
ground line |
bare alu wire |
0.4 |
m |
0.10 |
0.04 |
power connector |
stainless |
1 |
|
0.10 |
0.10 |
signal connector |
stainless |
1 |
|
0.10 |
0.10 |
ground connector |
stainless |
1 |
|
0.10 |
0.10 |
|
|
|
|
|
|
Drive system |
|
1 |
|
12.94 |
12.94 |
main drive |
|
1 |
|
10.15 |
10.15 |
reduced DC motor |
reduced motor |
1 |
|
10.00 |
10.00 |
coupling magnets |
iron |
0 |
|
0.10 |
0.00 |
magnet mounts |
recycled plastic |
0 |
|
0.07 |
0.00 |
mount |
white plastic rectangle profile 5x20mm |
0.1 |
|
1.50 |
0.15 |
selector drive |
|
0 |
|
0.97 |
0.00 |
DC motor |
steel, iron |
1 |
|
0.50 |
0.50 |
coupling magnets |
iron |
2 |
|
0.10 |
0.20 |
magnet mounts |
recycled plastic |
2 |
|
0.07 |
0.13 |
"gap-tooth" cam |
hard plastic |
1 |
|
0.07 |
0.07 |
worm gear |
hard plastic |
1 |
|
0.07 |
0.07 |
other pieces |
|
|
|
|
|
mount |
recycled plastic |
0 |
|
0.07 |
0.00 |
batteries |
NiH AA batteries |
4 |
|
1.00 |
4.00 |
drive electronics |
1 pole, double throw switches |
2 |
|
0.25 |
0.50 |
hermetic case |
PVC electrical box |
1 |
|
0.50 |
0.50 |
--
Erik Rossen <rossen@rossen.ch>
OpenPGP key: 2935D0B9
Tel: +41 78 617 72 83
Home URL: http://www.rossen.ch
Copyright © 2000 until the heat-death of the Universe (thanks, Mickey!), by Erik Rossen
Last modified: 2016-02-07T12:43:24+0100
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