Inclusion in Portfolio Standards

The majority of U.S. states have enacted a renewable portfolio standard or renewable energy standard (RPS or RES), specifying the amount of electricity that must come from renewable sources. Almost half of the states have enacted an energy efficiency resource standard (EERS), requiring a percentage reduction in energy use from energy efficiency measures.

Waste Heat to Power (electricity generated from industrial waste heat or pressure) is considered by some states to be a renewable energy, and is recognized as such in renewable portfolio standards. Similar to other renewables, it uses no additional fuel and creates no additional emissions. Furthermore, it adds a way for industrial facilities to participate (and even profit from) renewable portfolio standards.

Combined heat and power is fundamentally an energy efficiency measure. States that have not specifically included CHP in their EERS may see beneficial results from adding it, since it is more efficient than separate heat and power generation.

Southwest Region Status: Arizona's RPS includes renewable-fueled CHP but does not include waste heat to power. Arizona's EERS, does include CHP. Colorado's RPS does include waste heat to power; Colorado does not yet have an EERS. New Mexico's RPS is unclear as to whether waste heat to power qualifies. Utah only has a renewable portfolio goal, not a mandatory standard, but it does include waste heat to power as an eligible resource. Wyoming has neither an RPS nor an EERS.

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