SUPERCRITICAL CARBON DIOXIDE POWER GENERATION SYSTEM INCLUDING DRY GAS SEAL AND METHOD OF OPERATING THE SAME
First Claim
1. A supercritical carbon dioxide power generation system including a dry gas seal, comprising:
- a turbine;
a cooler;
a compressor;
a heater;
a carbon dioxide injecting portion injecting carbon dioxide as a working fluid from a carbon dioxide tank into an intake side of the compressor;
a heater flow path provided in the heater and configured to introduce and heat carbon dioxide generated in the compressor and then to discharge carbon dioxide to the turbine;
a seal gas flow path diverged from the heater flow path and guiding at least part of carbon dioxide heated on the heater flow path to be injected into a dry gas seal portion of the compressor and to be used as a seal gas;
a seal gas valve installed on the seal gas flow path and opening/closing of the seal gas flow path; and
a controller controlling an amount of an opening degree of the seal gas valve according to a temperature of carbon dioxide heated by the heater.
1 Assignment
0 Petitions
Accused Products
Abstract
According to the present invention, part of carbon dioxide heated by a heater is supplied to a dry gas seal portion of a compressor so that a device for pressurizing and heating a seal gas is not additionally required, configuration can be simplified and cost can be reduced. In addition, a seal gas flow path includes a low-temperature seal gas flow path and a high-temperature seal gas flow path so that, in an initial driving mode, carbon dioxide heated by a high-temperature portion of the heater is used as a seal gas and in a turbine-driving mode, carbon dioxide heated by a low-temperature portion of the heater is used as a seal gas and thus a more efficient operation can be performed.
-
Citations
10 Claims
-
1. A supercritical carbon dioxide power generation system including a dry gas seal, comprising:
-
a turbine; a cooler; a compressor; a heater; a carbon dioxide injecting portion injecting carbon dioxide as a working fluid from a carbon dioxide tank into an intake side of the compressor; a heater flow path provided in the heater and configured to introduce and heat carbon dioxide generated in the compressor and then to discharge carbon dioxide to the turbine; a seal gas flow path diverged from the heater flow path and guiding at least part of carbon dioxide heated on the heater flow path to be injected into a dry gas seal portion of the compressor and to be used as a seal gas; a seal gas valve installed on the seal gas flow path and opening/closing of the seal gas flow path; and a controller controlling an amount of an opening degree of the seal gas valve according to a temperature of carbon dioxide heated by the heater. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of controlling a supercritical carbon dioxide power generation system including a dry gas seal, the method comprising:
-
in an initial driving mode in which injecting of carbon dioxide from a carbon dioxide injecting portion into a compressor starts, operating a heater; opening a high-temperature seal gas flow path diverged from a high-temperature portion of a heater flow path that passes through the heater and closing a low-temperature seal gas flow path diverged from a low-temperature portion of the heater flow path so that at least part of carbon dioxide heated by the high-temperature portion of the heater is capable of being supplied to a dry gas seal portion of a compressor and is capable of being used as a seal gas; and measuring temperature of carbon dioxide on the low-temperature seal gas flow path and when the measured temperature is equal to or higher than a predetermined setting temperature, closing the high-temperature seal gas flow path and opening the low-temperature seal gas flow path so that part of carbon dioxide heated by the low-temperature portion of the heater is capable of being supplied to the dry gas seal portion of the compressor. - View Dependent Claims (8, 9, 10)
-
Specification