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− | + | 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. | |
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− | == | + | == Energy generation == |
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− | === | + | === Centralized === |
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− | === | + | ==== Solar updraft tower <ref>http://en.wikipedia.org/wiki/Solar_updraft_tower</ref> ==== |
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− | + | + Low maintenance cost. | |
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− | === | + | +Uses greenhouses that can be used for agriculture. |
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+ | -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> | ||
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+ | 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 == | == References == | ||
{{Reflist}} | {{Reflist}} |