Dual reheat topping cycle for improved energy efficiency for compressed air energy storage plants with high air storage pressure
US-9938895-B2 · Apr 10, 2018 · US
Extended gas turbine process having an expander
US11492963B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11492963-B2 |
| Application number | US-201917050482-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 6, 2019 |
| Priority date | May 22, 2018 |
| Publication date | Nov 8, 2022 |
| Grant date | Nov 8, 2022 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A power plant including a compressor, a combustion chamber and a turbine, and a compressor air line, which connects the compressor to the combustion chamber, a first heat exchanger connected into the compressor air line and into an exhaust line branching off the turbine. A first expander is arranged between the first heat exchanger and the combustion chamber in the compressor air line, and the first expander and the compressor are arranged on a common shaft.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for operating a power plant having a compressor, a combustion chamber and a turbine, the method comprising: choosing an outlet pressure of the compressor to be higher than a required turbine inlet pressure, preheating the compressor air in a heat exchanger before the compressor air is expanded prior to the combustion, wherein the compressor air is preheated in the heat exchanger with an exhaust gas of the power plant, and wherein the expansion of the compressor air prior to the combustion is utilized for driving the compressor. 2. The method as claimed in claim 1 , wherein the compressor air is lowered by the expansion to a turbine pressure level and a maximum permissible temperature for the combustion chamber. 3. The method as claimed in claim 1 , wherein waste heat from the exhaust gas and from a compressor intercooling is utilized for driving a chiller that utilizes the waste heat, for the purpose of improved intercooling of the compressor. 4. The method as claimed in claim 3 , wherein water is heated in the heat exchange with the exhaust gas and compressed air and is then evaporated at least partially by a first flash evaporator, wherein the steam produced by the first flash evaporator is fed to a steam jet nozzle and the water produced is further cooled and fed to a second flash evaporator, in which the heated water is evaporated, the steam withdrawn by at least one steam jet nozzle for withdrawing the steam by suction, wherein the water cooled during the evaporation is fed to an inlet of at least part of the compressor intercooling.
Assignees
Inventors
Classifications
- F02C3/10Primary
with another turbine driving an output shaft but not driving the compressor · CPC title
Combined heat and power generation [CHP] · CPC title
- F02C7/143Primary
before or between the compressor stages · CPC title
Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title
in gas turbines · CPC title
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- What does patent US11492963B2 cover?
- A power plant including a compressor, a combustion chamber and a turbine, and a compressor air line, which connects the compressor to the combustion chamber, a first heat exchanger connected into the compressor air line and into an exhaust line branching off the turbine. A first expander is arranged between the first heat exchanger and the combustion chamber in the compressor air line, and the …
- Who is the assignee on this patent?
- Siemens Energy Global Gmbh & Co Kg
- What technology area does this patent fall under?
- Primary CPC classification F02C3/10. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 08 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).