Methods and systems for starting and stopping a closed-cycle turbomachine
AssigneePeregrine Turbine Technologies, LLC
InventorsDavid Scott STAPP, III, Ian David STAPP
Life of this patent
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Abstract
The present disclosure relates to methods for starting and rapidly decelerating a turbomachine in a power generation system that utilizes a supercritical fluid in a closed cycle.
Claims27
In a system for generating power utilizing a closed cycle with a working fluid, when the working fluid is in a supercritical state, the closed cycle including a turbomachine comprising a supercritical fluid compressor connected via a shaft to a supercritical fluid turbine, a method for starting the turbomachine comprising the steps of:
- a) charging a mass of working fluid that is not in the supercritical state in the closed cycle up to a starting mass that is greater than a design operating mass, wherein the design operating mass is the mass of working fluid in the closed cycle when operating at steady-state design point conditions;
- b) heating the working fluid;
- and
- c) venting a discharge mass of working fluid from the closed cycle at a location in the closed cycle that is on an exhaust side of the supercritical fluid turbine.
In a system for generating power utilizing a supercritical fluid in a closed cycle, the closed cycle including a turbomachine comprising a supercritical fluid compressor connected via a shaft to a supercritical fluid turbine and at least one heat exchanger disposed along the closed cycle and configured to reduce a temperature of the supercritical fluid entering an inlet of the compressor, a method for decelerating the turbomachine comprising the steps of:
- a) directing a flow of supercritical fluid from the compressor to an inlet of the turbine;
- b) directing the flow of supercritical fluid from the turbine to the at least one heat exchanger;
- c) directing the flow of supercritical fluid from the at least one heat exchanger to the inlet of the compressor;
- and
- d) reducing a flow of a cooling medium to the at least one heat exchanger, thereby allowing the temperature of the supercritical fluid entering the compressor inlet to increase, wherein the increased temperature of the supercritical fluid entering the compressor inlet causes the turbomachine to decelerate.
Dependencies are inferred from the claim text.