Tuesday, May 31, 2016

Information Simple solar power system diagram

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Simple solar power system diagram

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Solar Energy in Pakistan: Basic Architecture of Solar Power Generator

Solar Energy in Pakistan: Basic Architecture of Solar Power Generator

EXCLUSS SOLAR PV Solar Panels

EXCLUSS SOLAR PV Solar Panels

Survive Climate Change  The Future of Energy

Survive Climate Change The Future of Energy

Solar Thermal Power Plant Diagram Block diagram of a solar

Solar Thermal Power Plant Diagram Block diagram of a solar

Solar power. How to use its energy  Petervaldivia

Solar power. How to use its energy Petervaldivia

DIY Solar Powered Birdhouse Light

DIY Solar Powered Birdhouse Light

sample setup for a solar powered cabin.

Sample setup for a solar powered cabin.

Solar cell - wikipedia, A solar cell, or photovoltaic cell (previously termed "solar battery"), is an electrical device that converts the energy of light directly into electricity by the.
Solar panel - wikipedia, Solar panel refers to a panel designed to absorb the sun's rays as a source of energy for generating electricity or heating. a photovoltaic (pv) module is a packaged.
Nrg home solar – residential solar systems & financing, Nrg residential solar solutions llc d/b/a nrg home solar is a wholly-owned subsidiary of nrg energy, inc. nj:13vh06478300, ma: 170279, nyc: 2013158-dca, yonkers, ny.

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Windexchange: utility-scale land-based 80-meter wind maps, About the 80-meter wind resource maps. the u.s. map shows the predicted mean annual wind speeds at an 80-m height, presented at a spatial resolution of 2.5 kilometers.

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Monday, May 30, 2016

Climat et politique comment la mousson défaisait les dynasties chinoises

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En ce moment-même, comme chaque année, la mousson parcourt la Chine. S'engageant via la plateau tibétain pour la mousson indienne et la cote entre Canton et Shanghai pour la mousson sud-est asiatique, des masses de nuages remontent les 35 parallèles que couvrent le territoire chinois actuel - autant que de Nouakchott à Dublin !

Cette mousson d'été apporte à la Chine une bonne partie de ses précipitations annuelles et cette part augmente au fur et à mesure qu'elle remonte vers les régions arides du nord. A Pékin, par exemple, plus des deux-tiers des précipitation annuelles sont reçues en juillet et août.


Les variations de la mousson chinoise


On peut imaginer les conséquences si la mousson d'été s'affaiblissait et ne parvenait plus à atteindre ces régions... Or c'est précisément ce qui s'est passsé à plusieurs reprises au cours des deux derniers millénaires.

L'étude des dépots minéraux dans les grottes (Zhang et al., 2008) permet de reconstituer le niveau des précipitations avec un précision de 2 à 3 ans. Elle fait apparaitre de nettes variation dans le volumes des précipitations avec, notamment, une période plus humide pendant l'optimum climatique médiéval et une autre plus sèche pendant le petit age glaciaire. Cette reconstitution est confirmée par d'autres proxys (comme les sédiments lacustres) et aussi - en cela la Chine est unique - par les archives administratives.


Changement climatique et "mandat du Ciel"


L'histoire chinoise est une histoire d'alternances entre des dynasties fastes regnant sur une Chine unifiée et prospère et des décennies voire des siècles de chaos où des prétendants au trone s'affrontent au prix parfois de millions de morts.
Or la légitimité des empereurs chinois est basée sur le concept confucéen de "mandat du Ciel" : le Ciel approuve les dirigeants sages et vertueux mais peut retirer son approbation s'ils se conduisent mal. Dans ce système, les phénomènes naturels sont interprétés comme traduisant le jugement céleste, certains sont auspicieux d'autres, comme les innondations et les famines, traduisent sa réprobation et rendent légitime le renversement de la dynastie au pouvoir. En vertu de ce principe, les grandes catastrophes naturelles étaient souvent suivies d'insurrections populaires.

Dans ces conditions, il n'est pas surprenant que l'affaiblissement de la mousson d'été corresponde à des périodes de chaos. C'est notamment le cas lors de la chute de la dynastie Tang, un des âges d'or de la civilisation chinoise. Elle est suivie par 70 années de division (les "cinq dynasties et de dix royaumes") et la Chine n'est réunifiée qu'au moment où les précipitations reviennent à leur niveau normal. Un scénario similaire se retrouve à la fin des dynasties Yuan et Ming.


Adaptation

Cependant, la correspondance n'est pas parfaite : dans certains cas, les périodes d'instabilité interviennent plusieurs années après la baisse des précipitations, voire pas du tout...

Cela est peut-être du aux mesures d'adaptation mise en place par l'administration chinoise (Fan, 2009). Il en existe principalement deux. D'abord la création de stocks importants qui permettent d'alimenter la population en période de disette, ces stocks peuvent expliquer un décalage de 5 à 10 ans entre la baisse des précipitations et le début des troubles.

Ensuite, il y a le Grand Canal. Une voie d'eau artificielle coupant la Chine en deux sur près de 2000 kilomètres de Pékin à Hangzhou (près de Shanghai). Sa construction a débuté dès l'antiquité et s'est poursuivie pour atteindre ses dimensions actuelles autour du VIIe siècle. Cette infrastructure extraordinaire permettait de transporter d'immenses quantités de nourriture du centre de la Chine vers le nord : jusqu'à 300.000 tonnes de grains atteignaient Pékin chaque année par cette voie. Une telle capacité de transport permettait, aussi longtemps que les récoltes étaient bonnes au sud, d'alimenter les régions moins favorisées du nord.
Le Grand Canal aujourd'hui



Conclusion


La variation de la mousson d'été semble bien avoir joué un rôle important dans l'histoire chinoise. Elle montre comment un empire aussi puissant et organisé que la Chine a pu tenter de s'adapter à la variabilité de son climat, tout en y restant très vulnérable. Elle montre aussi, encore une fois, que les effets d'un changement climatique sur une société sont complexes et difficilement prévisible : le système politique, la culture, l'organisation administrative peuvent les réduire, ou au contraire les aggraver...

Cet article fait partie d'une série consacrée aux conséquences des changements climatiques passés pour les sociétés qui les ont subi. Déjà parus :
  • Quelques degrés de plus, opportunité ou menace (pour l'homme préhistorique)
  • Quand les résistances sociales sont trop fortes : l'effondrement de la colonie viking du Groenland

This Homemade windmill electricity generator

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DIY Wind Turbines, savonius, DIY water wheels, Darrieus wind turbine
DIY Wind Turbines, savonius, DIY water wheels, Darrieus wind turbine
Homemade Wind Turbine Generator together with Homemade Vertical Wind
Homemade Wind Turbine Generator together with Homemade Vertical Wind
HOMEMADE WINDMILL PLANS - House Plans & Home Designs
HOMEMADE WINDMILL PLANS - House Plans & Home Designs
Homemade Windmills  Life Free Energy
Homemade Windmills Life Free Energy
Homemade Wind Turbine Generator together with Homemade Vertical Wind
Homemade Wind Turbine Generator together with Homemade Vertical Wind
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Windmills homemade download video windmills homemade

Saturday, May 28, 2016

Useful How to build a pool solar panel rack

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For Free How to build a pool solar panel rack

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Install a Solar Pool Heater this Weekend!  InTheSwim Pool Blog

Install a Solar Pool Heater this Weekend! InTheSwim Pool Blog

Solar Panels

Solar Panels

Pool Safety, Green Pool Products, Pool Technical Articles

Pool Safety, Green Pool Products, Pool Technical Articles

Solar Pool Heaters for Flat Roofs

Solar Pool Heaters for Flat Roofs

Solar Pool Heaters for Flat Roofs

Solar Pool Heaters for Flat Roofs

Photovolatic panel for powering pump and controller

Photovolatic panel for powering pump and controller

BNB Rack EXPLORER HITCH Mount Premium Bike Carrier  GTmall Online

BNB Rack EXPLORER HITCH Mount Premium Bike Carrier GTmall Online


Friday, May 27, 2016

Guide Diy solar hot water panel design

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Diy solar hot water panel design

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Springs make: Making windmill school project

Springs make: Making windmill school project

Solar panels in parallel Solar panels in series

Solar panels in parallel Solar panels in series

Pin Solar Controller Circuit Diagram on Pinterest

Pin Solar Controller Circuit Diagram on Pinterest

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Solar water heating diy solar water heating solar water heating panels

Colors-LED-Mini-Wind-Power-Generation-Model-Windmill-Generators

Colors-LED-Mini-Wind-Power-Generation-Model-Windmill-Generators

 can solar heater, v2, completed  Solar Heater, Diy Solar and Solar

can solar heater, v2, completed Solar Heater, Diy Solar and Solar

News Info: Diy solar panel tracking system

News Info: Diy solar panel tracking system

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Thursday, May 26, 2016

Here Solar power generation plants in andhra pradesh

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Solar power generation plants in andhra pradesh

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315 MW Solar PPA Signed In Andhra Pradesh

315 MW Solar PPA Signed In Andhra Pradesh

GreentechLead  First Solar wins Andhra Pradesh solar tender with

GreentechLead First Solar wins Andhra Pradesh solar tender with

Development of Solar Power in Andhra Pradesh 1

Development of Solar Power in Andhra Pradesh 1

Solar Desalination Plants in Visakhapatnam, Andhra Pradesh, India

Solar Desalination Plants in Visakhapatnam, Andhra Pradesh, India

Figure 2: Solar hotspots demarcated over the annual solar energy map

Figure 2: Solar hotspots demarcated over the annual solar energy map

Welcome to Elite Energy Solutions

Welcome to Elite Energy Solutions

Welcome to Elite Energy Solutions

Welcome to Elite Energy Solutions


Solar power generation plants in andhra pradesh

Andhra pradesh thermal power plants - maps of india, Some of the other andhra pradesh thermal power plants are enumerated below: ramagundem (b) thermal power station a.p. power generation corporation limited.
Power sector of andhra pradesh - wikipedia, Power sector of andhra pradesh is divided into 4 categories namely regulation, generation, transmission and distribution. andhra pradesh electricity regulatory.
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Sunday, May 22, 2016

Diy solar and wind power for homes

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Solar Panel Wiring Diagram on Solar Panels For Homes
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Lamar alexander, off grid cabin, solar powered cabin, tiny cabin, diy
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Dual-Mode Hot-Water System Heated with Solar and Wood - Renewable
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Wind-tree-wind-turbine-3100-watt-wind-turbine
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Off Grid Solar Powered Tiny House is Completely Self Sufficient “Out
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Best pedal powered washing machine designs - Green Diary - Green

Saturday, May 21, 2016

Access Solar power plant kadiri

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Solar power plant kadiri

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Green blog: Build mini wind turbine generator

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Green blog: Diy solar panel combiner box

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Diy wind direction sensor

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Build It Yourself Electronic Wind Sensor

Build It Yourself Electronic Wind Sensor

WH1080 WH1090 Weather Station Wind Direction Sensor  eBay

WH1080 WH1090 Weather Station Wind Direction Sensor eBay

Basic layout of an ultrasonic anemometer (Source: http

Basic layout of an ultrasonic anemometer (Source: http

Taylor Weather Station Wind Sensor-2752 - The Home Depot

Taylor Weather Station Wind Sensor-2752 - The Home Depot

Ultrasonic Anemometer Sensor Ultrasonic Anemometer Ultrasonic Wind

Ultrasonic Anemometer Sensor Ultrasonic Anemometer Ultrasonic Wind

Inspeed Wind Sensor Hand Held Wind Meter Anemometer Storm Chaser

Inspeed Wind Sensor Hand Held Wind Meter Anemometer Storm Chaser

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