Abstract: A gas turbine engine that includes an inlet volume flow control appliance and methods of operating the same are provided. The method includes operating the gas turbine engine with the inlet volume flow control appliance supplying a compressor inlet volume flow that is below a maximum compressor inlet volume flow. A mass flow of a liquid agent is added to a compressor gas mass flow while the gas turbine engine is operated with a compressor inlet volume flow below a maximum compressor inlet volume flow. The mass flow of a liquid agent may be controlled as a function of the pitch of variable inlet guide vanes. The method further comprises adjusting the volume flow control appliance to increase the compressor inlet volume flow and increasing the mass flow of liquid agent added to the compressor gas mass flow while the inlet volume flow control appliance increases the compressor inlet volume.

Abstract: A gas turbine engine that includes an inlet volume flow control appliance and methods of operating the same are provided. The method includes operating the gas turbine engine with the inlet volume flow control appliance supplying a compressor inlet volume flow that is below a maximum compressor inlet volume flow. A mass flow of a liquid agent is added to a compressor gas mass flow while the gas turbine engine is operated with a compressor inlet volume flow below a maximum compressor inlet volume flow. The mass flow of a liquid agent may be controlled as a function of the pitch of variable inlet guide vanes. The method further comprises adjusting the volume flow control appliance to increase the compressor inlet volume flow and increasing the mass flow of liquid agent added to the compressor gas mass flow while the inlet volume flow control appliance increases the compressor inlet volume.

Abstract: A multi cycle geothermal power plant (5) has at least the following cycles: a primary cycle (10) configured for a geothermal reservoir fluid; a closed loop second cycle (20) having a vaporizer (7), spanning the primary cycle (10) and second cycle (20), for transferring thermal energy from the primary cycle (10) to the second cycle (20); and at least one further closed loop water/steam cycle (30) having a heat exchanger (8), spanning the primary cycle (10) and each further cycle (30), for transferring thermal energy from the primary cycle (10) to each further cycle (30). By providing indirect secondary cycles, the power plant (5) is capable of exploiting high impurity wells with high energy extraction efficiency.