Renewable Energy Essay

Another relevant metric is energy return on energy invested (EROI).

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EROI is the ratio of the energy delivered by a process to the energy used directly and indirectly in that process, and is part of lifecycle analysis (LCA).

An EROI of about 7 is considered break-even economically for developed countries.

A fuller account of EROI in electricity generation is in the information paper on Energy Return on Investment.

The (WEO2016) makes the points that VRE have five technical properties that make them distinct from more traditional forms of power generation.

I combine a large cross-sectional survey dataset on appliance ownership and household characteristics with data on local electricity prices.

Across three different appliance types, I find an elasticity of Energy Star ownership to retail electricity price of 0.58 to 0.66.There was never any doubt about the magnitude of these, the challenge was always in harnessing them so as to meet demand.Today we are well advanced in meeting that challenge, while also testing the practical limits of doing so from wind and solar (variable renewable energy, VRE).First, their maximum output fluctuates according to the real-time availability of wind and sunlight.Second, such fluctuations can be predicted accurately only a few hours to days in advance.As electricity demand escalated, with supply depending largely on fossil fuels plus some hydro power and then nuclear energy, concerns arose about carbon dioxide emissions contributing to possible global warming.Attention again turned to the huge sources of energy surging around us in nature – sun, wind, and seas in particular. Chapter 1 studies learning-by-doing during the generation process at wind and solar farms in the United States. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. This dissertation addresses three questions related to the economics of renewable energy.Solar thermal technologies in particular (with some heat storage) have great potential in sunny climates.With government encouragement to utilise wind and solar technologies, their costs have come down and are now in the same league per kilowatt-hour as the increased costs of fossil fuel technologies, especially with likely carbon emission charges on electricity generation from them.


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