Renewable Energy Types

WIND

https://en.wikipedia.org/wiki/Wind_power

http://chitribune.blogspot.com/2015/03/wind-turbines.html

http://www.wind-works.org/cms/index.php?id=64&tx_ttnews%5Btt_news%5D=2220&cHash=b55932dfebd049ab01c1d968670afc1e

The summary well captures the document and the state of the technology then and now.

“The following recommendations are made concerning the viability of developing small VAWTs or HAWTs.

• The maximum aerodynamic efficiency of any VAWT will be lower than available HAWT designs. This difference is likely to be between 15 and 25%.

• Due to the lower efficiency, the VAWT will capture less energy for the same swept area.

• For a given swept area, the mass of the rotor and support structure of a VAWT will be greater than that of an equivalent HAWT. This mass difference is likely to translate into a cost difference.

• The savings that a VAWT may enjoy due to lower drive train and maintenance costs are unlikely to balance the lower energy capture and higher initial rotor costs.

• The same diseconomies of scale apply, in theory, to both HAWT and VAWT configurations.

• Both HAWTs and VAWTs suffer from fatigue loads. The basic aerodynamic principles of the VAWT lead to fatigue loads at the harmonic frequencies, but the VAWT is not as sensitive as is the HAWT to the effects of turbulence. However, the VAWT is more likely to suffer resonant conditions especially if operated at variable speeds.”

The total amount of economically extractable power available from the wind is considerably more than present human power use from all sources. Wind power is very consistent from year to year but has significant variation over shorter time scales. As of 2014, Denmark has been generating around 40% of its electricity from wind. Over the past five years the average growth in new installations has been 27.6% each year. In the forecast to 2013 the expected average annual growth rate is 15.7%.[63][64] More than 200 GW of new wind power capacity could come on line before the end of 2014. Wind power market penetration is expected to reach 3.35% by 2013 and 8% by 2018. Wind power is capital intensive, but has no fuel costs.[125] The price of wind power is therefore much more stable than the volatile prices of fossil fuel sources.[126] The marginal cost of wind energy once a station is constructed is usually less than 1-cent per kW·h. In 1919 the German physicist Albert Betz showed that for a hypothetical ideal wind-energy extraction machine, the fundamental laws of conservation of mass and energy allowed no more than 16/27 (59.3%) of the kinetic energy of the wind to be captured. This Betz limit can be approached in modern turbine designs, which may reach 70 to 80% of the theoretical Betz limit. The maximum aerodynamic efficiency of any VAWT will be lower than available HAWT designs. This difference is likely to be between 15 and 25%. Due to the lower efficiency, the VAWT will capture less energy for the same swept area.


SOLAR

https://en.wikipedia.org/wiki/Solar_power

https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1CHWA_enUS551US551&ion=1&espv=2&ie=UTF-8#q=clear%20solar%20panels

http://mitei.mit.edu/news/transparent-solar-cells


GEOTHERMAL

https://en.wikipedia.org/wiki/Geothermal_energy

https://www.google.com/search?q=geothermal+energy+potential+map&rlz=1C1CHWA_enUS551US551&espv=2&biw=1745&bih=868&tbm=isch&tbo=u&source=univ&sa=X&ved=0CDIQsARqFQoTCMvXwILkmMgCFUKYgAodiAMJTg#imgrc=5IhJbplA2izviM%3A

http://www.geni.org/globalenergy/library/renewable-energy-resources/world/north-america/geo-north-america/geo-us.shtml

http://www.nrel.gov/gis/geothermal.html


HYDRO

https://en.wikipedia.org/wiki/Watermill


PIEZO-ELECTRIC

http://www.puiaudio.com/resources-white-papers-piezo-bender.aspx


California Renewable Energy

http://www.energy.ca.gov/renewables/


http://www.pepractice.com/services/new-buildings/

https://corporate.nh-hoteles.es/en/corporate-responsibility-and-sustainability/csr-management/environment/environmental-management/energy

How much energy is consumed in one of our rooms?

Average energy consumption in a hotel is 40.4 kwh per guest/night. We used to consume 48 kw per guest/night which means that energy consumption has dropped 15.83% since the implementation of the Environmental Strategic Plan in 2008.