Energy Efficiency

In 2022, roughly 25% of our total refinery energy consumption originated from renewable sources, including:

Valero Wilmington Refinery Cogeneration Unit

Cogeneration Plants and Expanders

  • Cogeneration Plants: Our cogeneration plants reduce our dependency on local power grids, which are often more costly. Cogeneration is a highly efficient and reliable way of producing electricity and thermal energy or steam, with the steam recycled back into the refining process for other uses. Valero has cogeneration systems at refineries in Wilmington, Benicia, Port Arthur and Pembroke.

  • Expanders: At six of our refineries, we have installed “expanders” on processing units that generate power from exhaust gases. We have the world’s largest expander at our Corpus Christi West refinery. In all, our expanders are designed with the capacity to annually displace more than 600,000 tons of carbon dioxide that otherwise would be generated by conventional power plants.

Cogeneration Plants and Expanders

Cogeneration Systems Infographic 2020
Wind Farm at Dusk

Wind Power

Adjacent to our McKee refinery in the Texas Panhandle, our wind farm includes 33 wind turbines with 50 megawatts of power generation capacity.



Example of hydropower

More than 99% of the electricity used at our Quebec City refinery comes from renewable sources – mainly hydropower, with small portions from wind, biomass, nuclear and thermal.


EPA Efficient Producer Program for Ethanol

Superior Process Efficiency With Ethanol

Our ethanol plants have implemented refining operational best practices in safety, reliability and environmental responsibility.

Six of our ethanol plants, with three more pending, are recognized under this program for superior process efficiency, including:

  • Reduced on-site energy consumption,
  • Increased fuel output; or
  • Use of biomass or biogas to reduce greenhouse gas emissions.