US 11,927,116 B2
Methods and systems for starting and stopping a closed-cycle turbomachine
David Scott Stapp, Wiscasset, ME (US); and Ian David Stapp, Wiscasset, ME (US)
Assigned to Peregrine Turbine Technologies, LLC, Wiscasset, ME (US)
Appl. No. 17/772,208
Filed by Peregrine Turbine Technologies, LLC, Wiscasset, ME (US)
PCT Filed Oct. 28, 2020, PCT No. PCT/US2020/057772
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/086989, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/926,951, filed on Oct. 28, 2019.
Prior Publication US 2022/0403759 A1, Dec. 22, 2022
Int. Cl. F01K 13/02 (2006.01); F01K 3/22 (2006.01); F01K 7/32 (2006.01); F01K 25/10 (2006.01); F02C 1/10 (2006.01)
CPC F01K 13/02 (2013.01) [F01K 3/22 (2013.01); F01K 7/32 (2013.01); F01K 25/103 (2013.01); F02C 1/10 (2013.01); F05D 2260/85 (2013.01); F05D 2260/90 (2013.01)] 21 Claims
OG exemplary drawing
 
1. 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.