Plug Power Inc.

General Electric Company

David Alan Gutenmann

Kenneth McClellan Rush

Lukas Mercer Hansen

Richard Hayes Cutright

Joshua Webb

Charles Clarence Hicks, Jr

Elwood A Eisler

Systems and methods for controlling an energy storage system are provided. In one embodiment, a method for controlling an energy storage system includes receiving a power demand associated with a grid service operation for an energy storage system and accessing data indicative of a time shift for responding to the power demand. The method includes implementing the time shift in the power demand to obtain a time shifted power demand; and controlling the charge or discharge of one or more energy storage devices in the energy storage system based at least in part on the time shifted power demand.

State of charge maintenance during operation of energy storage systems

A technique that is usable with a fuel cell includes generating a humidified reactant flow. The technique includes measuring a rate of condensate production from the reactant flow and controlling the generation of the humidified reactant flow in response to the measured rate of condensate production.

Humidifying a reactant flow of a fuel cell system

The invention relates to systems and associated methods of operating fuel cell systems where the rotational speed of a reactant humidification enthalpy wheel is dynamically controlled according to various process variables. In one embodiment, a method is provided for operating a fuel cell system, including the following steps: (1) rotating a porous desiccant material about a rotational axis; (2) flowing air through the desiccant material in a direction parallel to the rotational axis to a cathode inlet of a fuel cell; (3) flowing cathode exhaust from the fuel cell through the desiccant material; (4) monitoring a process performance variable; (5) detecting a change in a value of the process performance variable; and (6) varying a rotational speed of the desiccant material in response to the detected change in the value of the process performance variable.

Apparatus and method for dynamic control of an enthalpy wheel in a fuel cell system

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Clifton Park, NY, United States of America

David Alan Gutenmann