Abstract: In one embodiment, a closed cycle gas turbine system employs a precooler for cooling the gas prior to compression. A closed loop coolant circuit for the precooler includes a primary heat exchanger. A secondary heat exchanger is provided which may be employed during periods of peak demand on the turbine system to provide additional cooling for the coolant in the closed loop coolant circuit for the precooler. The secondary heat exchanger may also be employed to transfer heat in the reverse direction during periods of time in which the primary heat exchanger is operating at high effectiveness to provide storage of a fluid at low temperature to enhance operation in the initially described mode. In another embodiment, a similar coolant circuit operates in conjunction with a condenser for a steam power electrical generating facility.

Abstract: In one embodiment, a closed cycle gas turbine system employs a precooler for cooling the gas prior to compression. A closed loop coolant circuit for the precooler includes a primary heat exchanger. A secondary heat exchanger is provided which may be employed during periods of peak demand on the turbine system to provide additional cooling for the coolant in the closed loop coolant circuit for the precooler. The secondary heat exchanger may also be employed to transfer heat in the reverse direction during periods of time in which the primary heat exchanger is operating at high effectiveness to provide storage of a fluid at low temperature to enhance operation in the initially described mode. In another embodiment, a similar coolant circuit operates in conjunction with a condenser for a steam power electrical generating facility.