JPH0730337U - Intake duct for gas turbine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an intake duct for a gas turbine that does not cause pressure loss due to the intake cooler when the outside air temperature is low and cooling by the intake cooler is not required. [Structure] An intake duct 2 containing an intake cooler 4 is provided with a passage 6 that bypasses the intake cooler 4, and a damper 7 that opens and closes the passage 6 is provided in the passage 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an intake duct for a gas turbine, and more particularly to an intake duct for a gas turbine having an intake cooler built therein.

[0002]

[Prior art]

 Generally, a gas turbine has a characteristic that its output decreases as the temperature rises, and its output decreases especially in the summer when the demand for electricity is high. In order to compensate for this, the air supplied to the gas turbine is cooled by an intake cooler installed in the intake duct to prevent the output of the gas turbine from decreasing.

[0003]

[Problems to be solved by the device]

 However, due to the pressure loss due to the intake cooler and the mist separator (water droplet separator) attached to the downstream side of the intake cooler, the output of the gas turbine decreases except during the summer when the intake cooler is not required. For example, assuming that the output reduction of the gas turbine due to the pressure loss of the intake air cooler is about 0.5%, the power reduction of the gas turbine with an output of 15 MW is about 75 KW. Therefore, if the annual operating time that does not require the intake air cooler is 5000 hours and the electricity bill is 12 yen / KWH, the annual loss is about 4.5 million yen.

The present invention has been made in view of the above conventional drawbacks, and an object of the present invention is to reduce the pressure caused by the intake air cooler when the temperature of the outside air is low and cooling by the intake air cooler is not required. An object is to provide an intake duct for a gas turbine that does not cause a loss.

[0005]

[Means for Solving the Problems]

 An intake duct for a gas turbine according to the present invention that can achieve the above object is provided with a passage for bypassing the intake cooler in an intake duct containing an intake cooler, and a damper for opening and closing the passage in the above passage. Is provided. When the damper is closed in the summer when the temperature rises, the air introduced into the intake duct is cooled while passing through the intake cooler in the intake duct, preventing the output of the gas turbine from decreasing, while reducing the temperature. When the damper is opened except during the summer when the temperature drops, the air introduced into the intake duct bypasses the intake cooler, preventing pressure loss of the air introduced into the gas turbine.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a gas turbine package, and the gas turbine package 1 has an intake duct 2 for introducing air as shown by an arrow A. The intake duct 2 includes an intake filter 3, an intake cooler 4, and a mist separator (water droplet separator) 5 attached to the intake cooler 4 in this order from the upstream side to the downstream side.

Further, on both side surfaces of the intake duct 2, bypass passages 6 that bypass the intake cooler 4 and the mist separator 5 are provided at the installation positions of the intake cooler 4, and the inlet portions 6 a of each bypass passage 6 are provided. A damper 7 is provided for each. Next, the operation of the gas turbine intake duct will be described. In the summer when the temperature rises, the inlet dampers 7, 7 of the bypass passages 6, 6 on both sides of the intake air cooler 4 are closed. Then, the air introduced into the intake duct 2 passes through the intake cooler 4 without passing through the bypass passages 6 and 6, and is cooled in the meantime. Therefore, the output reduction of the gas turbine can be prevented.

On the other hand, the damper 7 is opened in the spring, autumn, and winter when the temperature drops. Then, the air introduced into the intake duct 2 bypasses the intake cooler 2 and passes through the bypass passage 6, so that the pressure loss of the air introduced into the gas turbine can be prevented. Since the intake air cooler 4 is not closed by the damper 7, some air also passes through the intake air cooler 4 at this time as well. The opening and closing of the damper 7 may be performed manually, but it is desirable to automate it.

[0009]

[Effect of device]

 As described above, according to the present invention, the intake duct having the built-in intake air cooler is provided with the passage for bypassing the intake air cooler, and the passage is provided with the damper for opening and closing the passage. In summer when the temperature is high, the output can be increased by cooling the introduced air through an intake air cooler, while in spring, autumn, winter when the temperature is low, the intake cooler is bypassed to prevent pressure loss. It is possible to prevent the output from decreasing.

[Brief description of drawings]

FIG. 1 is a plan view including a partial cross section of an intake duct for a gas turbine according to the present invention.

FIG. 2 is a side view including a partial cross section of an intake duct for a gas turbine according to the present invention.

[Explanation of symbols]

2 Intake duct 4 Intake cooler 6 Bypass passage 7 Damper

Claims (1)

[Scope of utility model registration request] 1. An intake duct for a gas turbine, wherein an intake duct having a built-in intake cooler is provided with a passage that bypasses the intake cooler, and a damper that opens and closes the passage is provided in the passage. .