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US 11,846,232 B2Granted
Low-grade heat optimization of recuperative supercritical CO2 power cycles
Assignee8 Rivers Capital, LLC
InventorBrock Alan Forrest
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Abstract
The present disclosure provides systems and methods for power production. In particular, the systems and methods utilize the addition of heat to an expanded turbine exhaust stream in order to increase the available quantity of heat for recuperation and use therein for heating a compressed carbon dioxide stream for recycle back to a combustor of the power production system and method.
Claims13
A method for power generation, the method comprising:
- combusting a fuel in a combustor with an oxidant in the presence of a compressed stream of carbon dioxide to form a compressed combustion product stream;
- expanding the compressed combustion product stream across a turbine to generate power and provide an expanded combustion product stream;
- passing the expanded combustion product stream through a primary heat exchanger to recuperate an available quantity of heat therefrom and form a cooled turbine exhaust stream;
- removing water from the cooled turbine exhaust stream to provide a stream of carbon dioxide;
- compressing the stream of carbon dioxide to form the compressed stream of carbon dioxide;
- recycling the compressed stream of carbon dioxide back to the combustor;
- heating a circulating fluid stream in a low-grade heat source to form a heated circulating fluid stream;
- and
- using the heated circulating fluid stream to increase the available quantity of heat that is recuperated through heat exchange in one or both of the primary heat exchanger and a secondary heat exchanger, without intermixing of the heated circulating fluid stream and the expanded combustion product stream.
6 more elements
Dependencies are inferred from the claim text.