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In a general power system, a thermal engine having a thermal energy source with a compressor and turbine combination operating in a Brayton cycle with the compressor being driven by an electrical motor and the turbine driving a generator, the compressor compressing the motive gas which is thermally

In a general power system, a thermal engine having a thermal energy source with a compressor and turbine combination operating in a Brayton cycle with the compressor being driven by an electrical motor and the turbine driving a generator, the compressor compressing the motive gas which is thermally heated by the thermal energy source and the heated gas expanding in the turbine.

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1. In a general power system having an electrical storage and drive system, an improved thermal engine comprising:a. thermal energy source; and b. a Brayton cycle compressor and turbine combination in an open system wherein the combination has a single constant pressure compressor and a constant pre

1. In a general power system having an electrical storage and drive system, an improved thermal engine comprising:a. thermal energy source; and b. a Brayton cycle compressor and turbine combination in an open system wherein the combination has a single constant pressure compressor and a constant pressure turbine, where the compressor has a drive shaft connected to a drive means for driving the compressor independently from the turbine and the turbine has a driven output shaft for mechanical output disconnected from the drive shaft of the compressor, wherein the compressor compresses motive gas, the thermal energy source heats compressed gas from the compressor, and the turbine receives heated gas from the thermal energy source, the turbine having an output dependent on the amount of thermal energy transferred to the motive gas by the thermal energy source.