Difference between revisions of "Energy"

Revision as of 05:51, 28 February 2013

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

Solar updraft tower ^[1]

1 MW = 3,8 million EUR (+cost of land: approx 100,000-1,000,000) ^[2]

+ Low maintenance cost.

+ Uses greenhouses that can be used for agriculture.

+ Output is less variable compared to other solar methods

-Takes in a relatively large amount of space.

Solar power tower

+Desalinizes water.

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

-Solar has a variable output.

PV panels

1 MW = 1,8 million EUR (most sunny areas)

1 MW = 2,9 million EUR (least sunny areas)

The most important solar regions of Romania are the Black Sea coast, Dobrogea and Oltenia with an average of 1,600 kWh/ m2/year

960 kwh / m2 / year = 109 W m2^[3]

1 m2 = 200 eur^[4] = 109 W

+ Decentralized

- Variable output

Energy use

• Beamer

100-300 Watts. Can provide for +- 100 people. Per person: 2 Watt.^[5]

• Small led television

57 Watt. Per person: 14-57 Watt.^[6]

• Xbox

185 Watts ^[7]

• Wii

18 Watts^[8]

• Desktop (with peripherals):

60-250 Watts^[9]

• Laptop:

40 Watts^[10]

• Netbook:

16 Watts^[11]

• Tablet (Ipad2)

1-3 Watts ^[12]

• Iphone

Less than tablet^[13]

• Amplifier

40 Watts and up ^[14]

• DVD player

10 Watts and up

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

12 Watts ^[15]

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

6 Watts ^[16]

• Washing machine

0,81kwh/wash average 9 year average 500 EUR^[17] (If 10 people share one machine: 36 years = 200 EUR per person)

• Dishwasher

175 Kwh ^[18]

• Refrigerator

>12 Watt ^[19] (374 L, no freezer, 700 EUR)

12 V refrigerator 4,7 Watt 50L (700 USD)^[20]

Monetary cost

Solar updraft tower

5 USD per Watt, so 1 MW tower = 5 million USD ^[21] (Schlaig 2005)

This report from Schlaig (1995) suggests a 1 MW tower would cost no less than 20 million USD.^[22] The data is older, but it does account for rising cost when plant is smaller.

Collector diameter +- 750 meter = 400,000 m2 = 100 acre (60 soccer pitches)^[23]

Land price US +- 1,000 - 10,000 USD per acre

Argentina < 8,000 USD per acre ^[24]

100,000 - 1,000,000 for land

Cost of maintenance 40 years: +- 1,000,000 USD ^[25]

100 W capacity per settler when the sun is shining. This means using anything other than a tablet / smartphone is advised against. Watching television by yourself or with a handful of people should also not be a habit.

A 1 MW solar plant will produce +- 0.25 MW average over a 24 hour day.^[26]

References