Heather Clancy, GreenBiz
Summary
The not-so-little dirty secret of many "cleaner" cogeneration technologies available to companies today (cleaner than coal or diesel, that is) is that they’re powered by natural gas.
Increasingly, I’m hearing about installations where renewables coexist with cogen, and I suspect that will happen more frequently as more businesses start seeking to shrink the carbon footprint of their thermal energy loads.
Case in point: the hybrid microgrid powering the Taylor Farms processing plant in Gonzalez, California. Installed in December 2016, the site supports a 1.85-megawatt wind turbine, a 1-MW solar array and a 2.3-MW system called the Clean Power Station, designed by Concentric Power. The latter handles about 64 percent of the plant’s power consumption — and it uses waste heat to provide refrigeration. (The microgrid software that manages how the intermittent and "firm" loads interact also comes from Concentric.)
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