Energy

Energy can be saved through sharing appliances (for instance by using a beamer to watch film and television). Energy plays an important part in automation.

Energy generation

Centralized

Solar updraft tower <ref>http://en.wikipedia.org/wiki/Solar_updraft_tower</ref>

+ Low maintenance cost.

+Uses greenhouses that can be used for agriculture.

-Takes in a relatively large amount of space.

-Solar has a variable output.

Solar power tower

+Desalinizes water.

+Contains a furnace (that can be used for melting iron for instance).

-Solar has a variable output.

Energy use

• Beamer

100-300 Watts. Can provide for +- 100 people. Per person: 2 Watt.<ref> http://www.energieverbruikers.nl/categorie/28/Beeld+en+geluid/Beamers </ref>

• Small led television

57 Watt. Per person: 14-57 Watt.<ref> http://www.consumentenbond.nl/test/elektronica-communicatie/tv-en-video/televisies/extra/energieverbruik-tv/ </ref>

• Xbox

185 Watts <ref> http://tweakers.net/nieuws/46446/energieverbruik-xbox-360-ps3-wii-vergeleken.html </ref>

• Wii

18 Watts<ref> http://tweakers.net/nieuws/46446/energieverbruik-xbox-360-ps3-wii-vergeleken.html </ref>

• Desktop (with peripherals):

60-250 Watts<ref>http://michaelbluejay.com/electricity/computers.html </ref>

• Laptop:

40 Watts<ref>http://michaelbluejay.com/electricity/computers.html </ref>

• Netbook:

16 Watts<ref>http://michaelbluejay.com/electricity/computers.html </ref>

• Tablet (Ipad2)

1-3 Watts <ref>http://armdevices.net/wp-content/uploads/2012/04/nextgen_pixelqi_display.jpg </ref>

• Iphone

Less than tablet<ref> http://cdn.macrumors.com/article-new/2012/09/iphone_5_energy_use_compared.jpg</ref>

• Amplifier

40 Watts and up <ref>http://www.energieverbruikers.nl/categorie/195/2/Versterkers</ref>

• DVD player

10 Watts and up

• Nanolight (100W equivalent, 30,000 hours)

12 Watts <ref> http://www.thenanolight.com/index.php?option=com_content&view=article&id=38&Itemid=207 </ref>

• Led lamp (50-60W equivalent, 50,000 hours)

6 Watts <ref> http://www.ledlampendirect.nl/led-e27-lamp-230-volt-6-watt-vervangt-50-60-watt-gloeilamp.html </ref>

• Washing machine

0,81kwh/wash average 9 year average 500 EUR<ref>https://forum.www.trosradar.nl/viewtopic.php?f=51&t=125783 </ref> (If 10 people share one machine: 36 years = 200 EUR per person)

• Dishwasher

175 Kwh <ref>http://www.nuon.nl/energie-besparen/artikelen-apparaten/verbruik-vaatwasser.jsp</ref>

• Refrigerator

16 Watt <ref>http://www.greenem.nl/columns/2012/01/864/wat-kost-een-koelkast-per-jaar</ref>

Monetary cost

Solar updraft tower

Estimates of total costs range from 7 (for a 200 MW plant) and 21 (for a 5 MW plant) euro cents per kWh to 25-35 cents per kWh.<ref> http://physicaplus.org.il/zope/home/en/1124811264/1137833043_en </ref>

Capacity (guesstimate) 10 Watt x 10,000 = 100 MW

kwh per person 0,6 x 365 x 40 x 0,07 = 613 EUR out of total budget 7,000 EUR

0,9 x ... = 920 EUR

Highest kwh price: ... x 0,35 = 3,000 EUR

Average electricity use: <ref> http://www.nibud.nl/uitgaven/huishouden/gas-elektriciteit-en-water.html</ref> 5 x ... 4,800 EUR

Energy saved by replacing televisions and desktop computers by beamers and ipads seems to be a factor 10. Combining that with the lowest price comes to a favorable result (613 EUR / 7,000 EUR). This is all without heating and cooling, and a lot of other things.

Wikipedia states that wind costs 3 cent per kwh (100 MW). So if the costs turns out to be 25-35 per kWh, wind would be a better choice.

Recommendations

• It seems to be important to get accurate cost predictions when talking to a contractor.
• Replace computers by ipads and televisions by beamers.

References

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