Abstract: A power generation system comprises a heat collector, a turbine generator system having a turbine and at least one doubly fed induction generator, a heat exchanger, a gas holding tank, an energy storage unit and a load. The heat collector is coupled to and in fluid communication with the heat exchanger, which is in turn coupled to the turbine of the turbine generator system. The turbine is coupled to the doubly fed induction generator, which is then coupled to the load. A controller is communicatively coupled to the at least one doubly fed induction generator for maintaining a constant electrical output and frequency. Depending upon the electrical output load, the doubly fed induction generator can operate in varying speeds to achieve efficiency. To enhance the expansion of the gas, the turbine generator system can further include a pre-heater for preheating the gas to be heated and expanded by the heat exchanger.

Abstract: The present disclosure describes embodiments of an efficient power management system and method for fuel efficiency. The power management system comprises an energy storage unit, at least one renewable energy resource, a controller and an engine. The engine is configured to operate at varying speeds to provide mechanical energy to a variable speed DC generator to generate power to charge up the energy storage unit. The speed of the engine is varied in response to a speed reference determined by the controller.