Difference between revisions of "Village:Energy"
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Revision as of 21:23, 13 February 2016
The idea is that we create a metropole containing villages / people with tents that all use 42VDC (+/- 8V) as only power source.
WHY?!
- Because power hacking is COOL!
- DC grids are HOT!
- <50(60)VDC is relatively safe.
- You can connect your:
- Wind generators
- Solar cells
- Woodgas generator
- Electrical bacteria soup
- Hamster wheels
- Fitness gym equipment
- Pocket fusion generator
- INSERT YOUR POWER IDEA HERE
HOW MUCH POWER? 1.21 JIGOWATTS!
Benadski has a plan and some stuff prepared already. Contact him for the details in the RevSpace IRC channel, or read on.
Alternative power SHA2017: brainfarts benadski
Example grid above:
- red: power central, no user ends. except maybe for a few big power suppliers
- yellow: interconnect / user tap point
- green: user tap point. tap points are for delivering power too
The grid must be:
- Safe
- ELV (a voltage not exceeding 42.4 Vac peak or 60 Vdc) is safest thing fiddling with
- Grid cable strands individually fused at least on positive rail, negative: earthed.
- Fuses must all be DC rated 60V+ for a DC ELV grid!
- High current side not accessible for end users
- Accessible
- Not too expensive converters for delivering / using power to / from grid.
- Connecting should be painless for end users.
- High power connections for villages must be available
- 24/7 powered
- Power transformer(s) for power when alt-power is depleted (no sun / wind etc.) ←Benadski already has a 15kW power supply!
- Small battery backup (not more than 15 minutes?), also doubles as stabilizer.
- Maybe other kinds of backup solutions, like bio-gas / wood-gas generators?
- Simple and robust
- Cables must be able to handle more power than needed
- A shorted or disconnected cable should not affect the rest of the grid
- Smart and anonymous? (not really my expertise, but interesting)
- Should a user need more power temporarily, let her/him access the power grid somehow to get some more? Can this be made non-traceable / anonymous?
- Let the network warn people when power demands are too high / voltage is low?
- Voltage dependant power, users can control when they use power just looking at the grid voltage. A converter can auto-start when there is plenty of power for instance.
Numb3rs and sort of facts: (sucked out of my thumb): ←I know, I know that's not an English expression (yet!) But used in many other countries, so: adapt! :P
- 42VDC? (range 34-50V, some safety to make sure >60V will never be reached) (42V is 7 6V batteries in series)
- 2A per user (enough for charging laptops, having blinkenlights etc.), average use under 0,667A
- 16A per village (to power a fridge, 4 laptops and lots of lights and/or audio), avg 6A
- Power generation, 32A max. 4 connections totaling 64A max. per power node. ZB: 32+19+1+12
- 300 users * 0,667A + 10 villages * 6A = 260A. 260A * 42V => 11kW average usage, estimated peak 15kW.
- Cables should handle about 25% of max. current => 52A, fused at 50A slo-blo
- 4x6mm2 can probably handle the current, but there cannot be a yellow/green conductor carrying current.
- 5x10mm2 is better, earth wire is now used for earth only. Voltage drops are lower, less losses. 5x16mm2 is awesome but very expensive...
- PTC fuses are excellent for user end protection, but must be pre-fused. One 16A per 8 2A outputs should do the trick
- Battery backup / stabilizer: 7x6V 10Ah at every corner of the grid. Decouples below 35V, starts charging again above 42V. Maybe bigger one at the center of the grid, 12Ah or higher
- We need a big load for destroying excess power when >48V (or store it somehow, see below)
- The whole concept / ruleset must be open and accessible online at least one half year before the event.
Wild ideas next!
- Water tower for storing energy and big-ass stat display. (Energy capacity fairly low)
- Big crane structure lifting / lowering a concrete weight or an old car to store / deliver power.
- Woodgas generator
- Biogas generator (from local biological waste like dead food, NOT from feces and/or pee) ←This could create horrible stench, use with care!
- Electrical bacteria farm (http://www.nwo.nl/en/research-and-results/cases/bio-batteries-in-the-seabed.html)
- Bicycle gym with generators (near showers please!)
- Design nice converters people can buy for little money (open hardware):
- >36V => 19V / 12V / 5V for powering stuff, with grid status outputs ←Benadski already has some (30+!) >38V to 12V20A converters for the power lurkers. These will be installed inside the yellow/green tap points.
- 5..42V => 36..48V (auto optimum point detection) for delivering power to the grid.
- 48..120V => 36..48V same as above. for the awesome solar frontier panels for instance.
- Data over power, for general grid stats or other cool things.
- Use the motion of people to generate power somehow. (children's playground power / walkways)
- Store excess energy in water heating for dish washing / showering, pre-heated water needs further heating before it's used.
- Limited number of alt-power tickets for participants will make sure people can participate. No disappointments. But I don't like limitations... What to do?