Energy futurePG&E in 106 MW combined solar-thermal-biofuel hybrid power

Published 17 June 2008

Pacific Gas and Electricity to build a combined solar-thermal-biofuel hybrid power plant in California which will deliver a total of 700 gigawatt hours (GWh) annually of renewable electricity to PG&E customers throughout northern and central parts of the state

Pacific Gas and Electric Company has entered into two contracts with San Joaquin Solar LLC, a subsidiary of Martifer Renewables Electricity LLC, for a combined 106.8 megawatts (MW) of solar thermal-biofuel hybrid power. Located near Coalinga, California, the solar-biofuel projects will deliver a total of 700 gigawatt hours (GWh) annually of renewable electricity to PG&E customers throughout northern and central California. Martifer’s renewable hybrid projects combine Luz solar thermal trough technology and steam turbines powered by biomass fuel to produce hybrid solar-biofuel renewable electricity. The incorporation of biofuel increases the overall production of renewable power by allowing for around-the-clock production of clean energy, even at night or when sunlight is not at its strongest. Each hybrid project will require 250,000 tons of biofuel annually, to be supplied from a combination of locally produced agricultural wastes, green wastes, and livestock manure. These projects are expected to begin operation in 2011.

California law requires each investor-owned utility to increase the share of eligible renewable generating resources in its electric power portfolio to 20 percent by 2010. PG&E has made contractual commitments to have over 20 percent of its future deliveries from renewables.