Renewable Energy

By admin at 3 January, 2009, 4:28 am

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Renewable Energy – Energy derived from resources that are regenerative or for all practical purposes cannot be depleted. Types of renewable energy resources include moving water (hydro, tidal and wave power), thermal gradients in ocean water, biomass, geothermal energy, solar energy, and wind energy. Municipal solid waste (MSW) is also considered to a renewable energy source because of the methane that it creates.

Renewable Portfolio Standard (RPS) – is a requirement for electric retail suppliers to source a minimum percentage of their electricity needs from eligible renewable resources.

R-Value – A measure of the capacity of a material to resist heat transfer. Building materials, ceiling wall and floor insulation are rated with R-values. The higher the R-Value of a material, the greater its insulating properties. R-value tables to determine the equivalent R-value of high mass wall construction materials are found in the 2000 International Energy Conservation Code. Thermal resistance calculations are based on changes in temperature over a given surface in time. No factors are in the calculation for humidity. Because of this, some materials or assemblies may exhibit different R-values in high humidity situations.

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