While 8.5 million customers lost power during Sandy, a small number of facilities (including residential buildings, hospitals, universities, and public service facilities) kept their power, heat, and critical equipment running.
“These facilities were able to do this because they used a technology called combined heat and power (CHP), a suite of highly efficient technologies that can run on a variety of fuels. Unlike traditional backup generators, CHP systems typically provide heat and power to facilities during regular operations. They tend to use natural gas and highly efficient turbines and engines to serve their very local loads, but they can also use biomass or biogas, which can be equally as reliable in times of disaster.”
See on aceee.org