EnviroStudies.net

Economic Development
and Redevelopment

“It is customary in books concerned with ecology to point out the need for further research. This need is apparent, but should not be overemphasized. The greater immediate need is for effective application of ecological principles that are already known.”
— 
Dasmann, Milton & Freeman, Ecological Principles for Economic Development (1978)
“just knowing that a journey is actually possible sweeps away half the excuses for not making the journey oneself”
— 
Ellerman & Stiglitz, in New Thinking in Macroeconomics (2003)
“successful economies have emphasized mobilization and use of national resources, not foreign aid, for capacity-building and development in general”
— 
Devendra Raj Panday, in Capacity for Development (2002)

Solar Thermal Electricity

Solar Thermal Electricity

Solar thermal electricity (STE) is the most cost-effective form of electricity generation. All global electricity needs can be met with solar thermal electricity generated in deserts and transmitted to the rest of the world using high voltage direct current (HVDC).

Figure 1. Solar trough collectors. Curved mirrors concentrate sunlight on pipes containing heat transfer fluid.

Sunlight in deserts is concentrated, to heat a liquid that produces steam to power a standard electricity generating turbine as used in natural gas power plants. These two types of plants are combined, with natural gas (or biogas) used for backup.

Solar thermal electricity plants are in deserts because much more solar radiation penetrates the dry atmosphere. Heat is efficiently stored in molten salt tanks to generate electricity at night. Deserts retain very little heat, radiating heat back to the sky at night. Intercepting a very small fraction of that energy is enough to provide all global electricity needs.

Figure 2. Areas marked red are suitable for generating solar thermal electricity. All global electricity demand can be met using a very small fraction of these areas. Map courtesy of Desertec.

High Voltage Direct Current

High Voltage Direct Current

Electricity from solar thermal electricity generating plants will be transported long distances to all parts of the world using high voltage direct current (HVDC) transmission lines.

HVDC transmits electricity much further using smaller towers and less wires.


Architecture, Engineering & Construction

Hemp
Wood substitute building material

Heliodons
Solar architecture


Development

Cuba

 
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Sunday, 24-Sep-2017 17:32:31 GMT